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| document no. u17336ej5v0ud00 (5th edition) date published february 2007 n cp(k) printed in japan 2005 pd78f0511 pd78f0511(a) pd78f0511(a2) pd78f0512 pd78f0512(a) pd78f0512(a2) pd78f0513 pd78f0513(a) pd78f0513(a2) pd78f0514 pd78f0514(a) pd78f0514(a2) pd78f0515 pd78f0515(a) pd78f0515(a2) pd78f0513d pd78f0515d 78k0/kc2 8-bit single-chip microcontrollers user?s manual the pd78f0513d and 78f0515d have on-chip debug functions. do not use these products for mass production because it s reliability cannot be guaranteed after the on-chip debug function has been used, due to issues with respect to the num ber of times the flash memory can be rewritten. nec electronics does not accept complaints concerning these products. www..net
user?s manual u17336ej5v0ud 2 [memo] user?s manual u17336ej5v0ud 3 1 2 3 4 voltage application waveform at input pin waveform distortion due to input noise or a reflected wave may cause malfunction. if the input of the cmos device stays in the area between v il (max) and v ih (min) due to noise, etc., the device may malfunction. take care to prevent chattering noise from entering the device when the input level is fixed, and also in the transition period when the input level passes through the area between v il (max) and v ih (min). handling of unused input pins unconnected cmos device inputs can be cause of malfunction. if an input pin is unconnected, it is possible that an internal input level may be generated due to noise, etc., causing malfunction. cmos devices behave differently than bipolar or nmos devices. input levels of cmos devices must be fixed high or low by using pull-up or pull-down circuitry. each unused pin should be connected to v dd or gnd via a resistor if there is a possibility that it will be an output pin. all handling related to unused pins must be judged separately for each device and according to related specifications governing the device. precaution against esd a strong electric field, when exposed to a mos device, can cause destruction of the gate oxide and ultimately degrade the device operation. steps must be taken to stop generation of static electricity as much as possible, and quickly dissipate it when it has occurred. environmental control must be adequate. when it is dry, a humidifier should be used. it is recommended to avoid using insulators that easily build up static electricity. semiconductor devices must be stored and transported in an anti-static container, static shielding bag or conductive material. all test and measurement tools including work benches and floors should be grounded. the operator should be grounded using a wrist strap. semiconductor devices must not be touched with bare hands. similar precautions need to be taken for pw boards with mounted semiconductor devices. status before initialization power-on does not necessarily define the initial status of a mos device. immediately after the power source is turned on, devices with reset functions have not yet been initialized. hence, power-on does not guarantee output pin levels, i/o settings or contents of registers. a device is not initialized until the reset signal is received. a reset operation must be executed immediately after power-on for devices with reset functions. power on/off sequence in the case of a device that uses different power supplies for the internal operation and external interface, as a rule, switch on the external power supply after switching on the internal power supply. when switching the power supply off, as a rule, switch off the external power supply and then the internal power supply. use of the reverse power on/off sequences may result in the application of an overvoltage to the internal elements of the device, causing malfunction and degradation of internal elements due to the passage of an abnormal current. the correct power on/off sequence must be judged separately for each device and according to related specifications governing the device. input of signal during power off state do not input signals or an i/o pull-up power supply while the device is not powered. the current injection that results from input of such a signal or i/o pull-up power supply may cause malfunction and the abnormal current that passes in the device at this time may cause degradation of internal elements. input of signals during the power off state must be judged separately for each device and according to related specifications governing the device. notes for cmos devices 5 6 user?s manual u17336ej5v0ud 4 eeprom is a trademark of nec electronics corporation. windows and windows nt are registered trademarks or trademarks of microsoft co rporation in the united states and/or other countries. pc/at is a trademark of internati onal business machines corporation. hp9000 series 700 and hp-ux are trademarks of hewlett-packard company. sparcstation is a trademark of sparc international, inc. solaris and sunos are trademar ks of sun microsystems, inc. superflash is a registered trademark of silicon stor age technology, inc. in several countries including the united states and japan. user?s manual u17336ej5v0ud 5 caution: this product uses superflash ? technology licensed from silicon storage technology, inc. the information in this document is current as of december, 2006. the information is subject to change without notice. for actual design-in, refer to the latest publications of nec electronics data sheets or data books, etc., for the most up-to-date specifications of nec electronics products. not all products and/or types are available in every country. please check with an nec electronics sales representative for availability and additional information. no part of this document may be copied or reproduced in any form or by any means without the prior written consent of nec electronics. nec electronics assumes no responsibility for any errors that may appear in this document. nec electronics does not assume any liability for infringement of patents, copyrights or other intellectual property rights of third parties by or arising from the use of nec electronics products listed in this document or any other liability arising from the use of such products. no license, express, implied or otherwise, is granted under any patents, copyrights or other intellectual property rights of nec electronics or others. descriptions of circuits, software and other related information in this document are provided for illustrative purposes in semiconductor product operation and application examples. the incorporation of these circuits, software and information in the design of a customer's equipment shall be done under the full responsibility of the customer. nec electronics assumes no responsibility for any losses incurred by customers or third parties arising from the use of these circuits, software and information. while nec electronics endeavors to enhance the quality, reliability and safety of nec electronics products, customers agree and acknowledge that the possibility of defects thereof cannot be eliminated entirely. to minimize risks of damage to property or injury (including death) to persons arising from defects in nec electronics products, customers must incorporate sufficient safety measures in their design, such as redundancy, fire-containment and anti-failure features. nec electronics products are classified into the following three quality grades: "standard", "special" and "specific". the "specific" quality grade applies only to nec electronics products developed based on a customer- designated "quality assurance program" for a specific application. the recommended applications of an nec electronics product depend on its quality grade, as indicated below. customers must check the quality grade of each nec electronics product before using it in a particular application. the quality grade of nec electronics products is "standard" unless otherwise expressly specified in nec electronics data sheets or data books, etc. if customers wish to use nec electronics products in applications not intended by nec electronics, they must contact an nec electronics sales representative in advance to determine nec electronics' willingness to support a given application. (note) ? ? ? ? ? ? m8e 02. 11-1 (1) (2) "nec electronics" as used in this statement means nec electronics corporation and also includes its majority-owned subsidiaries. "nec electronics products" means any product developed or manufactured by or for nec electronics (as defined above). computers, office equipment, communications equipment, test and measurement equipment, audio and visual equipment, home electronic appliances, machine tools, personal electronic equipment and industrial robots. transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster systems, anti-crime systems, safety equipment and medical equipment (not specifically designed for life support). aircraft, aerospace equipment, submersible repeaters, nuclear reactor control systems, life support systems and medical equipment for life support, etc. "standard": "special": "specific": user?s manual u17336ej5v0ud 6 introduction readers this manual is intended for user engineer s who wish to understand the functions of the 78k0/kc2 and design a nd develop applicatio n systems and programs for these devices. the target products are as follows. 78k0/kc2: pd78f0511, 78f0512, 78f0513, 78f0514, 78f0515, 78f0513d, 78f0515d, 78f0511(a), 78f0512( a), 78f0513(a), 78f0514(a), 78f0515(a), 78f0511(a2), 78f0512(a2 ), 78f0513(a2), 78f0514(a2), 78f0515(a2) purpose this manual is intended to give users an understanding of the functions described in the organization below. organization the 78k0/kc2 manual is separated into two parts: this manual and the instructions edition (common to 78k0 microcontrollers). 78k0/kc2 user?s manual (this manual) 78k/0 series user?s manual instructions ? pin functions ? internal block functions ? interrupts ? other on-chip peripheral functions ? electrical specifications ? cpu functions ? instruction set ? explanation of each instruction how to read this manual it is assumed that the readers of this ma nual have general knowledge of electrical engineering, logic circuits, and microcontrollers. ? when using this manual as the manual for (a) grade products and (a2) grade products: only the quality grade differs between st andard products, (a) grade products, and (a2) grade products. read the part number as follows. ? pd78f0511 pd78f0511(a), 78f0511(a2) ? pd78f0512 pd78f0512(a), 78f0512(a2) ? pd78f0513 pd78f0513(a), 78f0513(a2) ? pd78f0514 pd78f0514(a), 78f0514(a2) ? pd78f0515 pd78f0515(a), 78f0515(a2) ? to gain a general understanding of functions: read this manual in the order of the contents . the mark ? user?s manual u17336ej5v0ud 7 ? to check the details of a register when you know the register name: see appendix c register index . ? to know details of the 78k 0 microcontroller instructions: refer to the separate document 78k/0 series instructions user?s manual (u12326e) . conventions data significance: higher digits on the left and lower digits on the right active low representations: (overscore over pin and signal name) note : footnote for item marked with note in the text caution : information requiring particular attention remark : supplementary information numerical representations: binary ... or b decimal ... hexadecimal ... h related documents the related documents indicated in this pu blication may include preliminary versions. however, preliminary versions are not marked as such. documents related to devices document name document no. 78k0/kc2 user?s manual this manual 78k/0 series instructions user?s manual u12326e 78k0/kx2 flash memory programming (pr ogrammer) application note u17739e 78k0/kx2 flash memory self programming user?s manual note u17516e 78k0/kx2 eeprom tm emulation application note note u17517e note this document is under engineering management. for details, consult an nec electronics sales representative. documents related to development tools (software) (user?s manuals) document name document no. operation u17199e language u17198e ra78k0 ver. 3.80 assembler package structured assembly language u17197e operation u17201e cc78k0 ver. 3.70 c compiler language u17200e operation u17246e sm+ system simulator user open interface u17247e id78k0-qb ver. 2.90 integrat ed debugger operation u17437e pm plus ver. 5.20 u16934e caution the related documents listed above are subject to change without notice. be sure to use the latest version of each document when designing. user?s manual u17336ej5v0ud 8 documents related to development tools (hardware) (user?s manuals) document name document no. qb-78k0kx2 in-circuit emulator u17341e qb-78k0mini on-chip debug emulator u17029e qb-mini2 on-chip debug emulator with programming function u18371e documents related to flash memo ry programming (u ser?s manuals) document name document no. pg-fp4 flash memory programmer u15260e pg-fpl3 flash memory programmer u17454e other documents document name document no. semiconductor selection guide ? products and packages ? x13769x semiconductor device mount manual note quality grades on nec semiconductor devices c11531e nec semiconductor device reliability/quality control system c10983e guide to prevent damage for semiconductor devi ces by electrostatic discharge (esd) c11892e note see the ?semiconductor device m ount manual? website (h ttp://www.necel.com/pkg/en/mount/index.html). caution the related documents listed above are subject to change without notice. be sure to use the latest version of each document when designing. user?s manual u17336ej5v0ud 9 contents chapter 1 outline ........................................................................................................... ................. 17 1.1 features ................................................................................................................... ................. 17 1.2 applications ............................................................................................................... .............. 18 1.3 ordering information ....................................................................................................... ........ 19 1.4 pin configuration (top view).................................. ............................................................. ... 20 1.5 78k0/kx2 microcontroller lineup...... ..................................................................................... 2 6 1.6 block diagram.............................................................................................................. ............ 29 1.7 outline of functions ....................................................................................................... ......... 30 chapter 2 pin functions .................................................................................................... ........... 33 2.1 pin function list.......................................................................................................... ............ 33 2.2 description of pin functions .................................... ........................................................... ... 36 2.2.1 p00 and p01 (por t 0)..................................................................................................... .............36 2.2.2 p10 to p17 (por t 1)...................................................................................................... ...............37 2.2.3 p20 to p27 (por t 2)...................................................................................................... ...............38 2.2.4 p30 to p33 (por t 3)...................................................................................................... ...............38 2.2.5 p40 and p41 (port 4) (44- pin and 48-pin pr oducts only) ............................................................39 2.2.6 p60 to p63 (por t 6)...................................................................................................... ...............39 2.2.7 p70 to p75 (por t 7)...................................................................................................... ...............40 2.2.8 p120 to p124 (por t 12)................................................................................................... ............40 2.2.9 p130 (port 13) ( 48-pin produc ts only).................................................................................... .....41 2.2.10 p140 (port 14) ( 48-pin produc ts only)................................................................................... ......41 2.2.11 av ref .............................................................................................................................. ..........42 2.2.12 av ss .............................................................................................................................. ............42 2.2.13 reset ................................................................................................................... ....................42 2.2.14 regc.................................................................................................................... .....................42 2.2.15 v dd .............................................................................................................................. ..............42 2.2.16 v ss .............................................................................................................................. ..............42 2.2.17 flmd0 ................................................................................................................... ....................42 2.3 pin i/o circuits and recommended connection of unused pins....................................... 43 chapter 3 cpu architecture ................................................................................................. ..... 47 3.1 memory space............................................................................................................... ........... 47 3.1.1 internal progr am memory space ............................................................................................ ....56 3.1.2 internal data memory space............................................................................................... ........58 3.1.3 special function register (s fr) area ..................................................................................... .....59 3.1.4 data memo ry addre ssing ................................................................................................... ........59 3.2 processor registers ........................................................................................................ ........ 65 3.2.1 control registers........................................................................................................ .................65 3.2.2 general-purpo se regi sters ................................................................................................ .........69 3.2.3 special function register s (sfrs)........................................................................................ .......70 3.3 instruction address addressing .................................. .......................................................... 7 5 3.3.1 relative addre ssing...................................................................................................... ..............75 user?s manual u17336ej5v0ud 10 3.3.2 immediat e addre ssing ..................................................................................................... .......... 76 3.3.3 table indi rect addr essing ................................................................................................ .......... 77 3.3.4 register addre ssing ...................................................................................................... ............ 77 3.4 operand address addre ssing ................................................................................................ 7 8 3.4.1 impli ed addres sing ....................................................................................................... ............. 78 3.4.2 register addre ssing ...................................................................................................... ............ 79 3.4.3 direct addre ssing ........................................................................................................ .............. 80 3.4.4 short dire ct addressing .................................................................................................. ........... 81 3.4.5 special function r egister (sfr ) addre ssing ............................................................................... 82 3.4.6 register i ndirect addr essing............................................................................................. ......... 83 3.4.7 based addres sing......................................................................................................... ............. 84 3.4.8 based index ed addres sing ................................................................................................. ....... 85 3.4.9 stack addressi ng......................................................................................................... .............. 86 chapter 4 port functions ................................................................................................... ........ 87 4.1 port functions ............................................................................................................. ............. 87 4.2 port configurat ion ......................................................................................................... .......... 89 4.2.1 port 0................................................................................................................... ...................... 90 4.2.2 port 1................................................................................................................... ...................... 92 4.2.3 port 2................................................................................................................... ...................... 97 4.2.4 port 3................................................................................................................... ...................... 99 4.2.5 port 4 (44-pin and 48-pin pro ducts only) ................................................................................. .102 4.2.6 port 6................................................................................................................... .....................103 4.2.7 port 7................................................................................................................... .....................105 4.2.8 po rt 12.................................................................................................................. ....................106 4.2.9 port 13 (48-pi n products only) ........................................................................................... .......109 4.2.10 port 14 (48- pin products only) .......................................................................................... ........110 4.3 registers controlling port functi on .................................................................................... 111 4.4 port function operations................................................. .................................................. ... 116 4.4.1 writing to i/o port ...................................................................................................... ...............116 4.4.2 reading from i/o port.................................................................................................... ...........116 4.4.3 operatio ns on i/o port................................................................................................... ...........116 4.5 settings of port mode register and output latch when using alternate function....... 117 4.6 cautions on 1-bit manipulation instruction for port register n (pn) ................................ 119 chapter 5 clock generator .................................................................................................. .. 120 5.1 functions of clock generator....................................... ........................................................ 120 5.2 configuration of clock genera tor ........................................................................................ 121 5.3 registers controlling clock generator ....................... ........................................................ 123 5.4 system clock oscillator .................................................................................................... .... 132 5.4.1 x1 o scillat or............................................................................................................ ..................132 5.4.2 xt1 o scillato r ........................................................................................................... ................132 5.4.3 when subsystem clock is not us ed ......................................................................................... .135 5.4.4 internal high- speed osci llator ........................................................................................... ........135 5.4.5 internal lo w-speed osc illat or............................................................................................ .........135 5.4.6 pre scaler ................................................................................................................ ..................135 5.5 clock generator operation .............................................. .................................................... . 136 5.6 controlling clock .......................................................................................................... ......... 140 user?s manual u17336ej5v0ud 11 5.6.1 controlling high -speed system clock...................................................................................... ..140 5.6.2 example of controlling internal high-speed oscill ation cl ock .....................................................143 5.6.3 example of contro lling subsyste m clock................................................................................... 145 5.6.4 example of controlling intern al low-speed osc illation cl ock ......................................................147 5.6.5 clocks supplied to cp u and peripheral hardwar e....................................................................147 5.6.6 cpu clock status transitio n diagr am ...................................................................................... ..148 5.6.7 condition bef ore changing cpu clock and processing after c hanging cpu clock ...................153 5.6.8 time required for switchover of cpu clock and main system cl ock .........................................154 5.6.9 conditions before clock oscillation is stopped..........................................................................1 55 5.6.10 peripheral hardw are and source clocks ................................................................................... 156 chapter 6 16-bit timer/event counter 00........................................................................... 157 6.1 functions of 16-bit timer/ event counter 00 .............................. ......................................... 157 6.2 configuration of 16-bit timer/e vent counter 00................................................................. 158 6.3 registers controlling 16-bit ti mer/event counter 00 ..................... ................................... 163 6.4 operation of 16-bit timer/event counter 00 ....................................................................... 171 6.4.1 interval ti mer operation ................................................................................................. ...........171 6.4.2 square wave output oper ation ............................................................................................. ....174 6.4.3 external event counter o peration ......................................................................................... ....177 6.4.4 operation in clear & start mode entered by ti000 pin va lid edge in put....................................180 6.4.5 free-running timer oper ation............................................................................................. .......193 6.4.6 ppg output operation..................................................................................................... ..........202 6.4.7 one-shot puls e output op eration.......................................................................................... ....205 6.4.8 pulse width me asurement operati on ........................................................................................ 210 6.5 special use of tm00 ........................................................................................................ ...... 218 6.5.1 rewriting cr010 dur ing tm00 oper ation .................................................................................218 6.5.2 setting l vs00 and lv r00 .................................................................................................. .....218 6.6 cautions for 16-bit timer/event counter 00........................................................................ 220 chapter 7 8-bit timer/event counters 50 and 51 .......................................................... 224 7.1 functions of 8-bit time r/event counters 50 and 51.................. ......................................... 224 7.2 configuration of 8-bit timer/event counters 50 a nd 51 .................................................... 224 7.3 registers controlling 8- bit timer/event counters 50 and 51............................................ 227 7.4 operations of 8-bit timer/event counters 50 and 51......................................................... 232 7.4.1 operation as interval timer .............................................................................................. .........232 7.4.2 operation as ex ternal event count er ...................................................................................... ..234 7.4.3 square-wave output oper ation ............................................................................................. ....235 7.4.4 pwm output operat ion ..................................................................................................... ........236 7.5 cautions for 8-bit timer/event counters 50 and 51 ........................................................... 240 chapter 8 8-bit timers h0 and h1 ........................................................................................ .. 241 8.1 functions of 8-bit timers h0 and h1 ................................................................................... 241 8.2 configuration of 8-bit timers h0 and h1............................................................................. 241 8.3 registers controlling 8-bi t timers h0 and h1 .................................................................... 245 8.4 operation of 8-bit timers h0 and h1 ..................... .............................................................. 251 8.4.1 operation as interval timer/square-wa ve out put....................................................................... 251 8.4.2 operation as pwm output.................................................................................................. ......254 user?s manual u17336ej5v0ud 12 8.4.3 carrier generator operati on (8-bit timer h1 only )......................................................................26 0 chapter 9 watch timer...................................................................................................... .......... 267 9.1 functions of watch timer ................................................................................................... .. 267 9.2 configuration of watch timer....................................... ........................................................ 268 9.3 register controlling watch timer .............................. .......................................................... 269 9.4 watch timer operations..................................................................................................... ... 271 9.4.1 watch time r operation .................................................................................................... ..........271 9.4.2 interval ti mer operation................................................................................................. ............271 9.5 cautions for watch timer ................................................................................................... .. 272 chapter 10 watchdog timer .................................................................................................. ... 273 10.1 functions of watchdog timer .............................................................................................. 2 73 10.2 configuration of watchdog timer ................................ ........................................................ 274 10.3 register controlling watchdog timer ......................... ........................................................ 275 10.4 operation of watchdog timer............................................................................................... 276 10.4.1 controlling operat ion of watc hdog ti mer ................................................................................. ..276 10.4.2 setting overflow ti me of watc hdog ti mer................................................................................. ..277 10.4.3 setting window open period of watchdo g time r ........................................................................278 chapter 11 clock output controller (48-pin products only) .............................. 280 11.1 functions of clock outp ut controller.................................................................................. 280 11.2 configuration of clock output controller ........................................................................... 281 11.3 registers controlling clock output controller................................................................... 281 11.4 operations of clock output controller................................................................................ 283 chapter 12 a/d converter ................................................................................................... ...... 284 12.1 function of a/d converter ................................................................................................. ... 284 12.2 configuration of a/d converter .............................. .............................................................. 285 12.3 registers used in a/d converter.......................................................................................... 2 87 12.4 a/d converter operations .................................................................................................. ... 295 12.4.1 basic operations of a/d c onverter ....................................................................................... .....295 12.4.2 input volt age and conversi on results .................................................................................... ....297 12.4.3 a/d converte r operati on mode ............................................................................................ .....298 12.5 how to read a/d converter char acteristics table............................................................. 300 12.6 cautions for a/d converter................................................................................................ ... 302 chapter 13 serial interface uart0 ...................................................................................... 306 13.1 functions of serial interface uart0............................ ........................................................ 306 13.2 configuration of serial interf ace uart0 ............................................................................. 307 13.3 registers controlling serial in terface uart0..................................................................... 310 13.4 operation of serial interface uart0.......................... .......................................................... 315 13.4.1 operatio n stop mode ..................................................................................................... ...........315 13.4.2 asynchronous serial interface (uar t) m ode ........................................................................... 316 13.4.3 dedicated baud rate generator........................................................................................... ......322 13.4.4 calculatio n of bau d rate ................................................................................................ ...........323 user?s manual u17336ej5v0ud 13 chapter 14 serial interface uart6 ...................................................................................... 327 14.1 functions of serial interface uart6 .......................... ......................................................... 327 14.2 configuration of serial interfac e uart6 ............................................................................. 331 14.3 registers controlling serial interface uart6 ...... .............................................................. 334 14.4 operation of serial interface uart6........................ ............................................................ 343 14.4.1 operatio n stop mode..................................................................................................... ...........343 14.4.2 asynchronous serial interface (uar t) m ode ........................................................................... 344 14.4.3 dedicated baud rate generator ........................................................................................... .....357 14.4.4 calculation of baud rate ....................................................................................................... ....359 chapter 15 serial interface csi10 ........................................................................................ 3 64 15.1 functions of serial interface csi1 0 ..................................................................................... 36 4 15.2 configuration of serial interfac e csi10 ............................................................................... 365 15.3 registers controlling serial interf ace csi10 ...................................................................... 367 15.4 operation of serial interface csi10........................ .............................................................. 3 71 15.4.1 operatio n stop mode..................................................................................................... ...........371 15.4.2 3-wire se rial i/o mode .................................................................................................. ............371 chapter 16 serial interface iic0 .......................................................................................... . 382 16.1 functions of serial interface iic0............................. ........................................................... . 382 16.2 configuration of serial interfac e iic0 .................................................................................. 38 5 16.3 registers to control serial interface iic0............. ............................................................... 388 16.4 i 2 c bus mode functions ........................................................................................................ 401 16.4.1 pin conf iguration ....................................................................................................... ...............401 16.5 i 2 c bus definitions and control methods................... ......................................................... 402 16.5.1 start conditi ons ........................................................................................................ ................402 16.5.2 addr esses ............................................................................................................... .................403 16.5.3 transfer direct ion specif ication ........................................................................................ ........403 16.5.4 ack..................................................................................................................... .....................404 16.5.5 stop c onditio n .......................................................................................................... ................405 16.5.6 wait.................................................................................................................... ......................406 16.5.7 cance ling wa it.......................................................................................................... ................408 16.5.8 interrupt request (intiic0) generation timing and wa it cont rol.................................................408 16.5.9 address matc h detection method.......................................................................................... ...409 16.5.10 erro r detec tion ........................................................................................................ .................409 16.5.11 ext ension code ......................................................................................................... ...............410 16.5.12 arbi tration............................................................................................................ .....................411 16.5.13 wak eup func tion ........................................................................................................ ..............412 16.5.14 communicati on reservation .............................................................................................. .......413 16.5.15 c autio ns............................................................................................................... ....................416 16.5.16 communica tion oper ations ............................................................................................... .......417 16.5.17 timing of i 2 c interrupt request (i ntiic0) occu rrence ...............................................................425 16.6 timing charts............................................................................................................. ............ 446 chapter 17 multiplier/divider ( pd78f0514, 78f0515, and 78f0515d only)............... 453 17.1 functions of multiplier/divider ............................... ............................................................ .. 453 17.2 configuration of multiplier/divi der....................................................................................... 453 user?s manual u17336ej5v0ud 14 17.3 register controlling multiplie r/divider ................................................................................ 457 17.4 operations of multiplier/divi der.......................................................................................... .. 458 17.4.1 multiplicati on operation................................................................................................ .............458 17.4.2 division operat ion...................................................................................................... ...............460 chapter 18 interrupt functions ............................................................................................ 4 62 18.1 interrupt function types.................................................................................................. ..... 462 18.2 interrupt sources and configuration ........................... ........................................................ 462 18.3 registers controlling interrupt functions .......................................................................... 466 18.4 interrupt servicing operations ............................................................................................ . 474 18.4.1 maskable interr upt ackno wledgm ent ....................................................................................... .474 18.4.2 software interrupt r equest acknow ledgm ent ............................................................................ 476 18.4.3 multiple inte rrupt servicing............................................................................................ ............477 18.4.4 interrupt request hold .................................................................................................. .............480 chapter 19 key interrupt function ..................................................................................... 481 19.1 functions of key interrupt ............................................ .................................................... .... 481 19.2 configuration of key interrupt............................................................................................ .. 481 19.3 register controlling key interrupt ............................. .......................................................... 4 82 chapter 20 standby function ................................................................................................ .. 483 20.1 standby function and configurat ion................................................................................... 483 20.1.1 standby function........................................................................................................ ...............483 20.1.2 registers contro lling standby function.................................................................................. ....483 20.2 standby function operation................................................................................................ . 486 20.2.1 halt mode ............................................................................................................... ...............486 20.2.2 stop mode ............................................................................................................... ..............491 chapter 21 reset function.................................................................................................. ...... 497 21.1 register for confirming reset source................................................................................. 505 chapter 22 power-on-clear circuit...................................................................................... 506 22.1 functions of power-on-c lear circuit ................................................................................... 506 22.2 configuration of power-on-clear circuit ............................................................................. 507 22.3 operation of power-on-clear circuit.......................... .......................................................... 507 22.4 cautions for power-on-clear circuit .................................................................................... 510 chapter 23 low-voltage detector ....................................................................................... 512 23.1 functions of low-voltage detect or...................................................................................... 512 23.2 configuration of low-voltage detector ............................................................................... 513 23.3 registers controlling low-voltag e detector ...................................................................... 513 23.4 operation of low-voltage detector............................ .......................................................... 516 23.4.1 when used as re set ...................................................................................................... ...........517 23.4.2 when used as inte rrupt .................................................................................................. ..........522 23.5 cautions for low-voltage detector ............................ .......................................................... 527 user?s manual u17336ej5v0ud 15 chapter 24 option byte..................................................................................................... .......... 530 24.1 functions of option byte s ................................................................................................. ... 530 24.2 format of option byte ..................................................................................................... ...... 532 chapter 25 flash memory.................................................................................................... ...... 535 25.1 internal memory size switching register ............. .............................................................. 535 25.2 internal expansion ram size switching register.. ............................................................ 536 25.3 writing with flash memory programmer............... .............................................................. 537 25.4 programming environment................................................................................................... 545 25.5 communication mode ........................................................................................................ ... 545 25.6 handling of pins on board................................................................................................. ... 547 25.6.1 flmd 0 pi n ............................................................................................................... ................547 25.6.2 serial in terface pins................................................................................................... ...............547 25.6.3 reset pin ............................................................................................................... ................549 25.6.4 port pi ns............................................................................................................... ....................549 25.6.5 regc pin................................................................................................................ .................549 25.6.6 other signal pins ....................................................................................................... ...............549 25.6.7 powe r supply ............................................................................................................ ...............550 25.7 programming method........................................................................................................ .... 551 25.7.1 controllin g flash memory ................................................................................................ .........551 25.7.2 flash memory programming mode ..........................................................................................5 51 25.7.3 selecting co mmunicati on mode ............................................................................................ ...552 25.7.4 communicati on commands.................................................................................................. ....553 25.8 security settings......................................................................................................... ........... 554 25.9 processing time for each command when pg-fp4 is used (reference) ...................... 556 25.10 flash memory programming by self programming.. ......................................................... 557 25.10.1 boot sw ap func tion..................................................................................................... ..............564 chapter 26 on-chip debug function ( pd78f0513d and 78f0515d only)................... 566 26.1 connecting qb-78k0mini or qb-mini2 to pd78f0513d and 78f0515d......................... 566 26.2 reserved area used by qb-78k0mini and qb-min i2 ........................................................ 568 chapter 27 instruction set ................................................................................................. ..... 569 27.1 conventions used in operation list...................... .............................................................. 569 27.1.1 operand identifiers and specification method s ........................................................................569 27.1.2 description of operation column......................................................................................... ......570 27.1.3 description of fl ag operati on colu mn .................................................................................... ....570 27.2 operation list............................................................................................................ ............. 571 27.3 instructions listed by addressing type ............... .............................................................. 579 chapter 28 electrical specifications (standard products)................................... 582 chapter 29 electrical specifications ((a) grade products).................................... 603 chapter 30 electrical specifications ((a2) grade products: t a = ? 40 to +110 c)........................................................................................................ 622 user?s manual u17336ej5v0ud 16 chapter 31 electrical specifications ((a2) grade products: t a = ? 40 to +125 c)........................................................................................................ 641 chapter 32 package drawings ................................................................................................ 660 chapter 33 recommended soldering conditions........................................................... 665 chapter 34 cautions for wait.............................................................................................. ... 666 34.1 cautions for wait......................................................................................................... ........... 666 34.2 peripheral hardware that generates wait ................ .......................................................... 667 appendix a development tools............................................................................................... 668 a.1 software package ........................................................................................................... ....... 672 a.2 language processing so ftware............................................................................................ 672 a.3 control software ........................................................................................................... ......... 673 a.4 flash memory writing tools ................................................................................................. 674 a.4.1 when using flash memory programmer pg-fp4, fl-pr4, pg-f pl3, and fp -lite3 ..............674 a.4.2 when using on-chip d ebug emulator with progra mming function qb-mini2 ............................674 a.5 debugging tools (hardware) ................................................................................................ 6 75 a.5.1 when using in-circuit emulator qb -78k0 kx2........................................................................... 675 a.5.2 when using on-c hip debug emulator qb-78k0m ini.................................................................676 a.5.3 when using on-chip d ebug emulator with progra mming function qb-mini2 ............................676 a.6 debugging tools (software) ................................................................................................. 677 appendix b notes on target system design ................................................................... 678 appendix c register index .................................................................................................. ....... 680 c.1 register index (in alphabetical order with re spect to register names) ........................ 680 c.2 register index (in alphabetical order with re spect to register symbol) ....................... 683 appendix d list of cautions ............................................................................................... ...... 687 appendix e revision history................................................................................................. ...... 713 e.1 major revisions in this edition............................................................................................ 713 e.2 revision history of preceding editions....................... ........................................................ 719 user?s manual u17336ej5v0ud 17 chapter 1 outline 1.1 features { minimum instruction execution time can be changed from high speed (0.1 s: @ 20 mhz operation with high- speed system clock) to ultra low-speed (122 s: @ 32.768 khz operation with subsystem clock) { general-purpose register: 8 bits 32 registers (8 bits 8 registers 4 banks) { rom, ram capacities data memory item part number program memory (rom) internal high-speed ram note internal expansion ram note pd78f0511 16 kb 768 bytes pd78f0512 24 kb pd78f0513, 78f0513d 32 kb ? pd78f0514 48 kb 1 kb pd78f0515, 78f0515d flash memory note 60 kb 1 kb 2 kb note the internal flash memory, internal high-speed ram capacities, and internal expansion ram capacities can be changed using the internal memory size swit ching register (ims) and the internal expansion ram size switching register (i xs). for ims and ixs, see 25.1 memory size switching register and 25.2 internal expansion ram size switching register . { on-chip single-power-supply flash memory { self-programming (with boot swap function) { on-chip debug function ( pd78f0513d and 78f0515d only) note { on-chip power-on-clear (poc) circuit and low-voltage detector (lvi) { on-chip watchdog timer (operable with the on-chip internal low-speed oscillation clock) { on-chip multiplier/divider (16 bits 16 bits, 32 bits / 16 bits) ( pd78f0514, 78f0515, and 78f0515d only) { on-chip key interrupt function { on-chip clock output controller { i/o ports: 38-pin products: 31 (n-ch open drain: 4) 44-pin products: 37 (n-ch open drain: 4) 48-pin products: 41 (n-ch open drain: 4) note the pd78f0513d and 78f0515d have on-chip debug function s. do not use these products for mass production because its reliability c annot be guaranteed after the on-chip debug function has been used, due to issues with respect to the number of times the fl ash memory can be rewritten. nec electronics does not accept complaints concerning these products. chapter 1 outline user?s manual u17336ej5v0ud 18 { timer: 7 channels ? 16-bit timer/event counter: 1 channel ? 8-bit timer/event counter: 2 channels ? 8-bit timer: 2 channels ? watch timer: 1 channel ? watchdog timer: 1 channel { serial interface: 3 channels ? uart (lin (local interconnect network)-bus supported: 1 channel ? csi/uart note : 1 channel ? i 2 c: 1 channel { 10-bit resolution a/d converter (av ref = 2.3 to 5.5 v): 8 channels (38-pin products: 6 channels) { power supply voltage ? standard products, (a) grade products: v dd = 1.8 to 5.5 v ? (a2) grade products: v dd = 2.7 to 5.5 v { operating ambient temperature ? standard products, (a) grade products: t a = ?40 to +85 c ? (a2) grade products: t a = ?40 to +110 c, t a = ?40 to +125 c note select either of the functions of these alternate-function pins. 1.2 applications { automotive equipment (compatible with (a) and (a2) grade products) ? system control for body electricals (power windows, keyless entry reception, etc.) ? sub-microcontrollers for control { car audio { av equipment, home audio { pc peripheral equipment (keyboards, etc.) { household electrical appliances ? air conditioners ? microwave ovens, electric rice cookers { industrial equipment ? pumps ? vending machines ? fa (factory automation) chapter 1 outline user?s manual u17336ej5v0ud 19 1.3 ordering information ? flash memory version part number package quality grade pd78f0511ga-8eu-a 48-pin plastic lqfp (fine pitch) (7 x 7) standard pd78f0511gb-ues-a 44-pin plastic lqfp (10 x 10) standard pd78f0511mc-gaa-ax note 1 38-pin plastic ssop (7.62 mm (300)) standard pd78f0512ga-8eu-a 48-pin plastic lqfp (fine pitch) (7 x 7) standard pd78f0512gb-ues-a 44-pin plastic lqfp (10 x 10) standard pd78f0512mc-gaa-ax note 1 38-pin plastic ssop (7.62 mm (300)) standard pd78f0513ga-8eu-a 48-pin plastic lqfp (fine pitch) (7 x 7) standard pd78f0513gb-ues-a 44-pin plastic lqfp (10 x 10) standard pd78f0513mc-gaa-ax note 1 38-pin plastic ssop (7.62 mm (300)) standard pd78f0514ga-8eu-a 48-pin plastic lqfp (fine pitch) (7 x 7) standard pd78f0515ga-8eu-a 48-pin plastic lqfp (fine pitch) (7 x 7) standard pd78f0513dgb-ues-a note 2 44-pin plastic lqfp (10 x 10) standard pd78f0513dmc-gaa-ax notes 1, 2 38-pin plastic ssop (7.62 mm (300)) standard pd78f0515dga-8eu-a note 2 48-pin plastic lqfp (fine pitch) (7 x 7) standard pd78f0511ga(a)-gam-ax 48-pin plastic lqfp (fine pitch) (7 x 7) special pd78f0511gb(a)-gaf-ax 44-pin plastic lqfp (10 x 10) special pd78f0512ga(a)-gam-ax 48-pin plastic lqfp (fine pitch) (7 x 7) special pd78f0512gb(a)-gaf-ax 44-pin plastic lqfp (10 x 10) special pd78f0513ga(a)-gam-ax 48-pin plastic lqfp (fine pitch) (7 x 7) special pd78f0513gb(a)-gaf-ax 44-pin plastic lqfp (10 x 10) special pd78f0514ga(a)-gam-ax 48-pin plastic lqfp (fine pitch) (7 x 7) special pd78f0515ga(a)-gam-ax 48-pin plastic lqfp (fine pitch) (7 x 7) special pd78f0511ga(a2)-gam-ax 48-pin plastic lqfp (fine pitch) (7 x 7) special pd78f0511gb(a2)-gaf-ax 44-pin plastic lqfp (10 x 10) special pd78f0512ga(a2)-gam-ax 48-pin plastic lqfp (fine pitch) (7 x 7) special pd78f0512gb(a2)-gaf-ax 44-pin plastic lqfp (10 x 10) special pd78f0513ga(a2)-gam-ax 48-pin plastic lqfp (fine pitch) (7 x 7) special pd78f0513gb(a2)-gaf-ax 44-pin plastic lqfp (10 x 10) special pd78f0514ga(a2)-gam-ax 48-pin plastic lqfp (fine pitch) (7 x 7) special pd78f0515ga(a2)-gam-ax 48-pin plastic lqfp (fine pitch) (7 x 7) special notes 1. under development 2. the pd78f0513d and 78f0515d have on-chip debug functi ons. do not use these products for mass production because its reliability cannot be guarant eed after the on-chip debug function has been used, due to issues with respect to the number of times t he flash memory can be rewritten. nec electronics does not accept complaints concerning these products. remark products with -a and -ax at the end of t he part number are lead-free products. please refer to "quality grades on nec semiconductor devices" (document no. c11531e) published by nec electronics corporation to know the specification of the quality grade on the device and its recommended applications. chapter 1 outline user?s manual u17336ej5v0ud 20 1.4 pin configuration (top view) ? 38-pin plastic ssop (7.62 mm (300)) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 ani1/p21 ani0/p20 p01/ti010/to00 p00/ti000 p120/intp0/exlvi reset p124/xt2/exclks p123/xt1 flmd0 p122/x2/exclk/ocd0b note p121/x1/ocd0a note regc v ss v dd p60/scl0 p61/sda0 p62/exscl0 p63 p33/ti51/to51/intp4 ani2/p22 ani3/p23 ani4/p24 ani5/p25 av ss av ref p10/sck10/txd0 p11/si10/rxd0 p12/so10 p13/txd6 p14/rxd6 p15/toh0 p16/toh1/intp5 p17/ti50/to50 p30/intp1 p31/intp2/ocd1a note p32/intp3/ocd1b note p70/kr0 p71/kr1 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 note pd78f0513d (product with on-chip debug function) only cautions 1. make av ss the same potential as v ss . 2. connect the regc pin to v ss via a capacitor (0.47 to 1 f: recommended). 3. ani0/p20 to ani5/p25 ar e set in the analog input mode after release of reset. chapter 1 outline user?s manual u17336ej5v0ud 21 pin identification ani0 to ani5: analog input p70, p71: port 7 av ref : analog reference voltage p120 to p124: port 12 av ss : analog ground regc: regulator capacitance exclk: external clock input reset: reset (main system clock) rxd0, rxd6: receive data exclks: external clock input sck 10, scl0: serial clock input/output (subsystem clock) sda0: serial data input/output exlvi: external potential input si10: serial data input for low-voltage detector so10: serial data output exscl0: external serial clock input ti000, ti010, flmd0: flash programming mode ti50, ti51: timer input intp0 to intp5: external interrupt input to00, kr0, kr1: key return to50, to51, ocd0a note , ocd0b note , toh0, toh1: timer output ocd1a note , ocd1b note : on-chip debug input/output txd0, txd6: transmit data p00, p01: port 0 v dd : power supply p10 to p17: port 1 v ss : ground p20 to p25: port 2 x1, x2: crystal oscillator (main system p30 to p33: port 3 clock) p60 to p63: port 6 xt1, xt2: cr ystal oscillator (subsystem clock) note pd78f0513d (product with on-chip debug function) only chapter 1 outline user?s manual u17336ej5v0ud 22 ? 44-pin plastic lqfp (10 10) 1 2 3 4 5 6 7 8 9 10 11 33 32 31 30 29 28 27 26 25 24 23 p41 p40 reset p124/xt2/exclks p123/xt1 flmd0 p122/x2/exclk/ocd0b note p121/x1/ocd0a note regc v ss v dd av ss av ref p10/sck10/txd0 p11/si10/rxd0 p12/so10 p13/txd6 p14/rxd6 p15/toh0 p16/toh1/intp5 p17/ti50/to50 p30/intp1 12 13 14 15 16 17 18 19 20 21 22 44 43 42 41 40 39 38 37 36 35 34 p60/scl0 p61/sda0 p62/exscl0 p63 p33/ti51/to51/intp4 p73/kr3 p72/kr2 p71/kr1 p70/kr0 p32/intp3/ocd1b note p31/intp2/ocd1a note p120/intp0/exlvi p00/ti000 p01/ti010/to00 ani0/p20 ani1/p21 ani2/p22 ani3/p23 ani4/p24 ani5/p25 ani6/p26 ani7/p27 note pd78f0513d (product with on-chip debug function) only cautions 1. make av ss the same potential as v ss . 2. connect the regc pin to v ss via a capacitor (0.47 to 1 f: recommended). 3. ani0/p20 to ani7/p27 ar e set in the analog input mode after release of reset. chapter 1 outline user?s manual u17336ej5v0ud 23 pin identification ani0 to ani7: analog input p70 to p73: port 7 av ref : analog reference voltage p120 to p124: port 12 av ss : analog ground regc: regulator capacitance exclk: external clock input reset: reset (main system clock) rxd0, rxd6: receive data exclks: external clock input sck 10, scl0: serial clock input/output (subsystem clock) sda0: serial data input/output exlvi: external potential input si10: serial data input for low-voltage detector so10: serial data output exscl0: external serial clock input ti000, ti010, flmd0: flash programming mode ti50, ti51: timer input intp0 to intp5: external interrupt input to00, kr0 to kr3: key return to50, to51, ocd0a note , ocd0b note , toh0, toh1: timer output ocd1a note , ocd1b note : on-chip debug input/output txd0, txd6: transmit data p00, p01: port 0 v dd : power supply p10 to p17: port 1 v ss : ground p20 to p27: port 2 x1, x2: crystal oscillator (main system clock) p30 to p33: port 3 xt1, xt2: cr ystal oscillator (subsystem clock) p40, p41: port 4 p60 to p63: port 6 note pd78f0513d (product with on-chip debug function) only chapter 1 outline user?s manual u17336ej5v0ud 24 ? 48-pin plastic lqfp (fine pitch) (7 7) p60/scl0 p61/sda0 p62/exscl0 p63 p33/ti51/to51/intp4 p75 p74 p73/kr3 p72/kr2 p71/kr1 p70/kr0 p32/intp3/ocd1b note 1 2 3 4 5 6 7 8 9 10 11 12 48 47 46 45 44 43 42 41 40 39 38 37 13 14 15 16 17 18 19 20 21 22 23 24 36 35 34 33 32 31 30 29 28 27 26 25 p140/pcl/intp6 p00/ti000 p01/ti010/to00 p130 p20/ani0 ani1/p21 ani2/p22 ani3/p23 ani4/p24 ani5/p25 ani6/p26 ani7/p27 p31/intp2/ocd1a note p30/intp1 p17/ti50/to50 p16/toh1/intp5 p15/toh0 p14/rxd6 p13/txd6 p12/so10 p11/sl10/rxd0 p10/sck10/txd0 av ref av ss v dd v ss regc p121/x1/ocd0a note p122/x2/exclk/ocd0b note flmd0 p123/xt1 p124/xt2/exclks reset p40 p41 p120/intp0/exlvi note pd78f0515d (product with on-chip debug function) only cautions 1. make av ss the same potential as v ss . 2. connect the regc pin to v ss via a capacitor (0.47 to 1 f: recommended). 3. ani0/p20 to ani7/p27 ar e set in the analog input mode after release of reset. chapter 1 outline user?s manual u17336ej5v0ud 25 pin identification ani0 to ani7: analog input av ref : analog reference voltage av ss : analog ground exclk: external clock input (main system clock) exclks: external clock input (subsystem clock) exlvi: external potential input for low-voltage detector exscl0: external serial clock input flmd0: flash programming mode intp0 to intp6: external interrupt input kr0 to kr3: key return ocd0a note , ocd0b note , ocd1a note , ocd1b note : on-chip debug input/output p00, p01: port 0 p10 to p17: port 1 p20 to p27: port 2 p30 to p33: port 3 p40, p41: port 4 p60 to p63: port 6 p70 to p75: port 7 p120 to p124: port 12 p130: port 13 p140: port 14 pcl: programmable clock output regc: regulator capacitance reset: reset rxd0, rxd6: receive data sck10, scl0: serial clock input/output sda0: serial data input/output si10: serial data input so10: serial data output ti000, ti010, ti50, ti51: timer input to00, to50, to51, toh0, toh1: timer output txd0, txd6: transmit data v dd : power supply v ss : ground x1, x2: crystal oscillat or (main system clock) xt1, xt2: crystal oscillator (subsystem clock) note pd78f0515d (product with on-chip debug function) only chapter 1 outline user?s manual u17336ej5v0ud 26 1.5 78k0/kx2 microcontroller lineup 78k0/kb2 78k0/kc2 78k0/kd2 78k0/ke2 78k0/kf2 rom ram 30/36 pins 38/44 pins 48 pins 52 pins 64 pins 80 pins pd78f0527d note pd78f0537d note pd78f0547d note 128 kb 7 kb ? ? ? pd78f0527 pd78f0537 pd78f0547 96 kb 5 kb ? ? ? pd78f0526 pd78f0536 pd78f0546 pd78f0515d note 60 kb 3 kb ? ? pd78f0515 pd78f0525 pd78f0535 pd78f0545 48 kb 2 kb ? ? pd78f0514 pd78f0524 pd78f0534 pd78f0544 pd78f0503d note pd78f0513d note 32 kb 1 kb pd78f0503 pd78f0513 pd78f0513 pd78f0523 pd78f0533 ? 24 kb 1 kb pd78f0502 pd78f0512 pd78f0522 pd78f0532 ? 16 kb 768 b pd78f0501 pd78f0511 pd78f0521 pd78f0531 ? 8 kb 512 b pd78f0500 ? ? ? ? note product with on-chip debug function chapter 1 outline user?s manual u17336ej5v0ud 27 the list of functions of the 78k0/kx2 microcontrollers is shown below. (1/2) 78k0/kb2 78k0/kc2 part number item 30/36 pins 38/44 pins 48 pins flash memory (kb) 8 16 24 32 16 24 32 16 24 32 48 60 ram (kb) 0.5 0.75 1 1 0.75 1 1 0.75 1 1 2 3 bank (flash memory) ? power supply voltage ? standard products, (a) grade products: v dd = 1.8 to 5.5 v ? (a2) grade products: v dd = 2.7 to 5.5 v regulator provided minimum instruction execution time 0.1 s (20 mhz: v dd = 4.0 to 5.5 v)/0.2 s (10 mhz: v dd = 2.7 to 5.5 v)/ 0.4 s (5 mhz: v dd = 1.8 to 5.5 v) high-speed system 20 mhz: v dd = 4.0 to 5.5 v/10 mhz: v dd = 2.7 to 5.5 v/5 mhz: v dd = 1.8 to 5.5 v main internal high-speed oscillation 8 mhz (typ.): v dd = 1.8 to 5.5 v subsystem ? 32.768 khz (typ.): v dd = 1.8 to 5.5 v clock internal low-speed oscillation 240 khz (typ.): v dd = 1.8 to 5.5 v total 23 31 (38 pins)/ 37 (44 pins) 41 port n-ch o.d. (6 v tolerance) 2 4 4 16 bits (tm0) 1 ch 8 bits (tm5) 2 ch 8 bits (tmh) 2 ch watch ? 1 ch timer wdt 1 ch 3-wire csi ? automatic transmit/ receive 3-wire csi ? uart/3-wire csi note 1 ch uart supporting lin- bus 1 ch serial interface i 2 c bus 1 ch 10-bit a/d 4 ch 6 ch (38 pins)/ 8 ch (44 pins) 8 ch external 6 7 8 interrupt internal 14 16 key interrupt ? 2 ch (38 pins)/ 4 ch (44 pins) 4 ch reset pin provided poc 1.59 v 0.15 v (rise time to 1.8 v: 3.6 ms (max.)) lvi the detection level of the supply voltage is selectable in 16 steps. reset wdt provided clock output/buzzer output ? clock output only multiplier/divider ? provided on-chip debug function pd78f0503d only pd78f0513d only pd78f0515d only operating ambient temperature ? standard products, (a) grade products: t a = ?40 to +85 c ? (a2) grade products: t a = ?40 to +110 c, t a = ?40 to +125 c note select either of the functions of these alternate-function pins. chapter 1 outline user?s manual u17336ej5v0ud 28 (2/2) 78k0/kd2 78k0/ke2 78k0/kf2 part number item 52 pins 64 pins 80 pins flash memory (kb) 16 24 32 48 60 96 128 16 24 32 48 60 96 128 48 60 96 128 ram (kb) 0.75 1 1 2 3 5 7 0.75 1 1 2 3 5 7 2 3 5 7 bank (flash memory) ? 4 6 ? 4 6 ? 4 6 power supply voltage ? standard products, (a) grade products: v dd = 1.8 to 5.5 v ? (a2) grade products: v dd = 2.7 to 5.5 v regulator provided minimum instruction execution time 0.1 s (20 mhz: v dd = 4.0 to 5.5 v)/0.2 s (10 mhz: v dd = 2.7 to 5.5 v)/ 0.4 s (5 mhz: v dd = 1.8 to 5.5 v) high-speed system 20 mhz: v dd = 4.0 to 5.5 v/10 mhz: v dd = 2.7 to 5.5 v/5 mhz: v dd = 1.8 to 5.5 v main internal high-speed oscillation 8 mhz (typ.): v dd = 1.8 to 5.5 v subsystem 32.768 khz (typ.): v dd = 1.8 to 5.5 v clock internal low-speed oscillation 240 khz (typ.): v dd = 1.8 to 5.5 v total 45 55 71 port n-ch o.d. (6 v tolerance) 4 4 4 16 bits (tm0) 1 ch 2 ch 8 bits (tm5) 2 ch 8 bits (tmh) 2 ch watch 1 ch timer wdt 1 ch 3-wire csi ? 1 ch automatic transmit/ receive 3-wire csi ? 1 ch uart/3-wire csi note 1 ch uart supporting lin- bus 1 ch serial interface i 2 c bus 1 ch 10-bit a/d 8 ch external 8 9 interrupt internal 16 19 20 key interrupt 8 ch reset pin provided poc 1.59 v 0.15 v (rise time to 1.8 v: 3.6 ms (max.)) lvi the detection level of the supply voltage is selectable in 16 steps. reset wdt provided clock output/buzzer output clock output only provided multiplier/divider ? provided ? provided on-chip debug function pd78f0527d only pd78f0537d only pd78f0547d only operating ambient temperature ? standard products, (a) grade products: t a = ?40 to +85 c ? (a2) grade products: t a = ?40 to +110 c, t a = ?40 to +125 c note select either of the functions of these alternate-function pins. chapter 1 outline user?s manual u17336ej5v0ud 29 1.6 block diagram port 0 p00, p01 2 port 1 p10 to p17 port 2 p20 to p25, p26 note 1 , p27 note 1 8 port 3 p30 to p33 4 port 4 v ss flmd0 v dd 8 power-on-clear/ low-voltage indicator poc/lvi control reset control port 6 p60 to p63 4 port 7 p70, p71, p72 note 1 , p73 note 1 , p74 note 2 , p75 note 2 port 12 p120 to p124 port 13 note 2 p130 note 2 6 p40 note 1 , p41 note 1 2 port 14 note 2 p140 note 2 clock output control note 2 pcl/p140 note 2 key return 4 kr0/p70, kr1/p71, kr2/p72 note 1 , kr3/p73 note 1 exlvi/p120 system control reset x1/p121 x2/exclk/p122 xt1/p123 xt2/exclks/p124 ani0/p20 to ani5/p25, ani6/p26 note 1 , ani7/p27 note 1 interrupt control 8 a/d converter av ref av ss intp1/p30 to intp4/p33 4 intp0/p120 serial interface iic0 exscl0/p62 sda0/p61 scl0/p60 intp5/p16 intp6/p140 note 2 internal high-speed ram internal expansion ram note 3 78k/0 cpu core flash memory 8-bit timer h0 toh0/p15 8-bit timer h1 toh1/p16 ti50/to50/p17 8-bit timer/ event counter 50 rxd0/p11 txd0/p10 serial interface uart0 watchdog timer rxd6/p14 txd6/p13 serial interface uart6 ti51/to51/p33 8-bit timer/ event counter 51 watch timer serial interface csi10 si10/p11 so10/p12 sck10/p10 16-bit timer/ event counter 00 to00/ti010/p01 ti000/p00 multiplier & divider note 3 on-chip debug note 4 rxd6/p14 (linsel) rxd6/p14 (linsel) linsel 5 ocd0a note 4 /x1, ocd1a note 4 /p31 ocd0b note 4 /x2, ocd1b note 4 /p32 internal low-speed oscillator internal high-speed oscillator voltage regulator regc notes 1. available only in the 44-pin and 48-pin products. 2 available only in the 48-pin products. 3. available only in the pd78f0514, 78f0515, and 78f0515d. 4. available only in the pd78f0513d and 78f0515d. chapter 1 outline user?s manual u17336ej5v0ud 30 1.7 outline of functions (1/2) item pd78f0511 pd78f0512 pd78f0513 pd78f0513d pd78f0514 pd78f0515 pd78f0515d flash memory (self-programming supported) note 16 k 24 k 32 k 48 k 60 k high-speed ram note 768 1 k internal memory (bytes) expansion ram note ? 1 k 2 k memory space 64 kb high-speed x1 (crystal/ceramic) oscillation, extern al main system clock input (exclk) standard products, (a) grade products 1 to 20 mhz: v dd = 4.0 to 5.5 v, 1 to 10 mhz: v dd = 2.7 to 5.5 v, 1 to 5 mhz: v dd = 1.8 to 5.5 v system clock (a2) grade products 1 to 20 mhz: v dd = 4.0 to 5.5 v, 1 to 10 mhz: v dd = 2.7 to 5.5 v internal high- speed oscillation internal oscillation standard products, (a) grade products 8 mhz (typ.): v dd = 1.8 to 5.5 v main system clock (oscillation frequency) clock (a2) grade products 8 mhz (typ.): v dd = 2.7 to 5.5 v subsystem clock xt1 (crystal) oscillation, external subsystem clock input (exclks) standard products, (a) grade products 32.768 khz (typ.): v dd = 1.8 to 5.5 v (oscillation frequency) (a2) grade products 32.768 khz (typ.): v dd = 2.7 to 5.5 v internal low-speed internal oscillation standard products, (a) grade products 240 khz (typ.): v dd = 1.8 to 5.5 v oscillation clock (for tmh1, wdt) (a2) grade products 240 khz (typ.): v dd = 2.7 to 5.5 v general-purpose registers 8 bits 32 registers (8 bits 8 registers 4 banks) 0.1 s (high-speed system clock: @ f xh = 20 mhz operation) 0.25 s (internal high-speed oscillation clock: @ f rh = 8 mhz (typ.) operation) minimum instruction execution time 122 s (subsystem clock: @ f sub = 32.768 khz operation) note the internal flash memory capacity, internal high-sp eed ram capacity, and internal expansion ram capacity can be changed using the internal memory size switchi ng register (ims) and the internal expansion ram size switching register (ixs). chapter 1 outline user?s manual u17336ej5v0ud 31 (2/2) item pd78f0511 pd78f0512 pd78f0513 pd78f0513d pd78f0514 pd78f0515 pd78f0515d instruction set ? 8-/16-bit operation ? multiply/divide (8 bits 8 bits, 16 bits 8 bits) ? bit manipulate (set, reset, test, and boolean operation) ? bcd adjust, etc. i/o ports total: 31 (38-pin products) 37 (44-pin products) 41 (48-pin products) cmos i/o: 27 33 36 cmos output: 0 0 1 n-ch open-drain i/o (6 v tolerance): 4 4 4 timers ? 16-bit timer/event counter: 1 channel ? 8-bit timer/event counter: 2 channels ? 8-bit timer: 2 channels ? watch timer: 1 channel ? watchdog timer: 1 channel timer outputs 5 (pwm output: 4, ppg output: 1) clock output (48-pin products only) ? 156.25 khz, 312.5 khz, 625 khz, 1.25 mhz, 2.5 mhz, 5 mhz, 10 mhz (peripheral hardware clock: @ f prs = 20 mhz operation) ? 32.768 khz (subsystem clock: @ f sub = 32.768 khz operation) a/d converter ? 38-pin products: 10-bit resolution 6 channels (av ref = 2.3 to 5.5 v) ? 44-pin, 48-pin products: 10-bit resolution 8 channels (av ref = 2.3 to 5.5 v) serial interface ? uart mode su pporting lin-bus: 1 channel ? 3-wire serial i/o mode/uart mode note : 1 channel ? i 2 c bus mode: 1 channel multiplier/divider ? ? 16 bits 16 bits = 32 bits (multiplication) ? 32 bits 16 bits = 32 bits remainder of 16 bits (division) internal 16 vectored interrupt sources external 7 (38-pin, 44-pin products), 8 (48-pin products) key interrupt key interrupt (intkr) occurs by detec ting falling edge of key input pins (kr0 and kr1 (38-pin products), kr0 to kr3 (44-pin, 48-pin products)). reset ? reset using reset pin ? internal reset by watchdog timer ? internal reset by power-on-clear ? internal reset by low-voltage detector on-chip debug function ? provided ? provided power supply voltage ? standard products, (a) grade products: v dd = 1.8 to 5.5 v ? (a2) grade products: v dd = 2.7 to 5.5 v operating ambient temperature ? standard products, (a) grade products: t a = ?40 to +85 c ? (a2) grade products: t a = ?40 to +110 c, t a = ?40 to +125 c package ? 38-pin plastic ssop (7.62 mm (300)) ? 44-pin plastic lqfp (10 10) ? 48-pin plastic lqfp (fine pitch) (7 7) note select either of the functions of these alternate-function pins. chapter 1 outline user?s manual u17336ej5v0ud 32 an outline of the timer is shown below. 16-bit timer/ event counter 00 8-bit timer/ event counters 50 and 51 8-bit timers h0 and h1 tm00 tm50 tm51 tmh0 tmh1 watch timer watchdog timer interval timer 1 channel 1 channel 1 channel 1 channel 1 channel 1 c hannel note 1 ? external event counter 1 channel 1 channel 1 channel ? ? ? ? ppg output 1 output ? ? ? ? ? ? pwm output ? 1 output 1 output 1 output 1 output ? ? pulse width measurement 2 inputs ? ? ? ? ? ? square-wave output 1 output 1 output 1 output 1 output 1 output ? ? carrier generator ? ? ? ? 1 output note 2 ? ? watch timer ? ? ? ? ? 1 channel note 1 ? function watchdog timer ? ? ? ? ? ? 1 channel interrupt source 2 1 1 1 1 1 ? notes 1. in the watch timer, the watch timer function and interval timer function can be used simultaneously. 2. tm51 and tmh1 can be used in combination as a carrier generator mode. user?s manual u17336ej5v0ud 33 chapter 2 pin functions 2.1 pin function list there are two types of pin i/o buffer power supplies: av ref and v dd . the relationship between these power supplies and the pins is shown below. table 2-1. pin i/o buffer power supplies power supply corresponding pins av ref p20 to p27 v dd pins other than p20 to p27 (1) port functions (1/2) function name i/o function after reset alternate function p00 ti000 p01 i/o port 0. 2-bit i/o port. input/output can be specified in 1-bit units. use of an on-chip pull-up resistor can be specified by a software setting. input port ti010/to00 p10 sck10/txd0 p11 si10/rxd0 p12 so10 p13 txd6 p14 rxd6 p15 toh0 p16 toh1/intp5 p17 i/o port 1. 8-bit i/o port. input/output can be specified in 1-bit units. use of an on-chip pull-up resistor can be specified by a software setting. input port ti50/to50 p20 to p25 ani0 to ani7 p26 note 1 , p27 note 1 i/o port 2. 8-bit i/o port. input/output can be specified in 1-bit units. analog input ani6 note 1 , ani7 note 1 p30 intp1 p31 intp2/ocd1a note 2 p32 intp3/ocd1b note 2 p33 i/o port 3. 4-bit i/o port. input/output can be specified in 1-bit units. use of an on-chip pull-up resistor can be specified by a software setting. input port ti51/to51/intp4 notes 1. 44-pin and 48-pin products only for the 38-pin products, be sure to set bits 6 and 7 of pm2 to ?1?, and bits 6 and 7 of p2 to ?0?. 2. pd78f0513d and 78f0515d only chapter 2 pin functions user?s manual u17336ej5v0ud 34 (1) port functions (2/2) function name i/o function after reset alternate function p40 note 1 and p41 note 1 i/o port 4. 2-bit i/o port. input/output can be specified in 1-bit units. use of an on-chip pull-up resistor can be specified by a software setting. input port ? p60 scl0 p61 sda0 p62 exscl0 p63 i/o port 6. 4-bit i/o port. output of p60 to p63 is n-ch open-drain output (6 v tolerance). input/output can be specified in 1-bit units. input port ? p70, p71 kr0, kr1 p72 note 1 and p73 note 1 kr2 note 1 and kr3 note 1 p74 note 2 and p75 note 2 i/o port 7. 6-bit i/o port. input/output can be specified in 1-bit units. use of an on-chip pull-up resistor can be specified by a software setting. input port ? p120 intp0/exlvi p121 x1/ocd0a note 3 p122 x2/exclk/ocd0b note 3 p123 xt1 p124 i/o port 12. 5-bit i/o port. input/output can be specified in 1-bit units. only for p120, use of an on-chip pull-up resistor can be specified by a software setting. input port xt2/exclks p130 note 2 output port 13. 1-bit output-only port. output port ? p140 note 2 i/o port 14. 1-bit i/o port. input/output can be specified in 1-bit units. use of an on-chip pull-up resistor can be specified by a software setting. input port pcl/intp6 note 2 notes 1. 44-pin and 48-pin products only for the 38-pin products, be sure to set bits 0 and 1 of pm4, bits 2 and 3 of pm7, bits 0 and 1 of p4, and bits 2 and 3 of p7 to ?0?. 2. 48-pin products only 3. pd78f0513d and 78f0515d only chapter 2 pin functions user?s manual u17336ej5v0ud 35 (2) non-port functions (1/2) function name i/o function after reset alternate function ani0 to ani5 p20 to p25 ani6 note 1 , ani7 note 1 input a/d converter analog input analog input p26 note 1 , p27 note 1 exlvi input potential input for external low-voltage detection input port p120/intp0 exscl0 input external clock input for serial interface. to input an external clock, input a clock of 6.4 mhz. input port p62 flmd0 ? flash memory programming mode setting ? ? intp0 p120/exlvi intp1 p30 intp2 p31/ocd1a note 2 intp3 p32/ocd1b note 2 intp4 p33/ti51/to51 intp5 p16/toh1 intp6 note 3 input external interrupt request input for which the valid edge (rising edge, falling edge, or both rising and falling edges) can be specified input port p140/pcl note 3 kr0, kr1 p70, p71 kr2 note 1 and kr3 note 1 input key interrupt input input port p72 note 1 and p73 note 1 pcl note 3 output clock output (for trimming of high-speed system clock, subsystem clock) input port p140/intp6 note 3 regc ? connecting regulator output (2.5 v) stabilization capacitance for internal operation. connect to v ss via a capacitor (0.47 to 1 f: recommended). ? ? reset input system reset input ? ? rxd0 p11/si10 rxd6 input serial data input to asynchr onous serial interface input port p14 sck10 p10/txd0 scl0 i/o clock input/output for serial interface input port p60 sda0 i/o serial data i/o for serial interface input port p61 si10 input serial data input to serial interface input port p11/rxd0 so10 output serial data output from serial interface input port p12 ti000 external count clock input to 16-bit timer/event counter 00 capture trigger input to captur e registers (cr000, cr010) of 16-bit timer/event counter 00 p00 ti010 input capture trigger input to capture register (cr000) of 16-bit timer/event counter 00 input port p01/to00 ti50 external count clock input to 8-bit timer/event counter 50 p17/to50 ti51 input external count clock input to 8-bit timer/event counter 51 input port p33/to51/intp4 to00 output 16-bit timer/event counter 00 output input port p01/ti010 notes 1. 44-pin and 48-pin products only for the 38-pin products, be sure to set bits 6 and 7 of pm2 to ?1?, and bits 2 and 3 of pm7, bits 6 and 7 of p2, and bits 2 and 3 of p7 to ?0?. 2. pd78f0513d and 78f0515d only 3. 48-pin products only chapter 2 pin functions user?s manual u17336ej5v0ud 36 (2) non-port pins (2/2) function name i/o function after reset alternate function to50 8-bit timer/event counter 50 output p17/ti50 to51 output 8-bit timer/event counter 51 output input port p33/ti51/intp4 toh0 8-bit timer h0 output p15 toh1 output 8-bit timer h1 output input port p16/intp5 txd0 p10/sck10 txd6 output serial data output from asynch ronous serial interface input port p13 x1 input p121/ocd0a note x2 ? connecting resonator for main system clock input port p122/exclk/ ocd0b note exclk input external clock input for main system clock input port p122/x2/ ocd0b note xt1 input input port p123 xt2 ? connecting resonator fo r subsystem clock input port p124/exclks exclks input external clock input fo r subsystem clock input port p124/xt2 v dd ? positive power supply for pins other than p20 to p27 ? ? av ref input a/d converter reference voltage input and positive power supply for p20 to p27 and a/d converter ? ? v ss ? ground potential for pins other than p20 to p27 ? ? av ss ? a/d converter ground potential. make the same potential as v ss . ? ? ocd0a note p121/x1 ocd1a note input p31/intp2 ocd0b note p122/x2/exclk ocd1b note ? connection for on-chip debug mode setting pins ( pd78f0513d and 78f0515d only) input port p32/intp3 note pd78f0513d and 78f0515d only 2.2 description of pin functions 2.2.1 p00 and p01 (port 0) p00 and p01 function as a 2-bit i/o port. these pins also function as timer i/o. the following operation modes can be specified in 1-bit units. (1) port mode p00 and p01 function as a 2- bit i/o port. p00 and p01 can be set to input or output port in 1-bit units using port mode register 0 (pm0). use of an on -chip pull-up resistor can be specified by pull-up resistor option register 0 (pu0). (2) control mode p00 and p01 function as timer i/o. (a) ti000 this is a pin for inputting an external count clock to 16-bit timer/event counter and is also for inputting a capture trigger signal to the ca pture registers (cr000, cr010) of 16-bit timer/event counter 00. chapter 2 pin functions user?s manual u17336ej5v0ud 37 (b) ti010 this is a pin for inputting a capture trigger signal to t he capture register (cr000) of 16-bit timer/event counter 00. (c) to00 this is a timer output pin of 16-bit timer/event counter 00. 2.2.2 p10 to p17 (port 1) p10 to p17 function as an 8-bit i/o port. t hese pins also function as pins for ex ternal interrupt re quest input, serial interface data i/o, cl ock i/o, and timer i/o. the following operation modes can be specified in 1-bit units. (1) port mode p10 to p17 function as an 8-bit i/o port. p10 to p17 can be set to input or output por t in 1-bit units using port mode register 1 (pm1). use of an on -chip pull-up resistor can be specified by pull-up resistor option register 1 (pu1). (2) control mode p10 to p17 function as external interrupt request in put, serial interface data i/o, clock i/o, and timer i/o. (a) si10 this is a serial data input pi n of serial interface csi10. (b) so10 this is a serial data output pin of serial interface csi10. (c) sck10 this is a serial clock i/o pin of serial interface csi10. (d) rxd0 this is a serial data input pi n of serial interface uart0. (e) rxd6 this is a serial data input pi n of serial interface uart6. (f) txd0 this is a serial data output pin of serial interface uart0. (g) txd6 this is a serial data output pin of serial interface uart6. (h) ti50 this is the pin for inputting an external c ount clock to 8-bit timer/event counter 50. (i) to50 this is a timer output pin of 8-it timer/event counter 50. chapter 2 pin functions user?s manual u17336ej5v0ud 38 (j) toh0, toh1 these are the timer output pins of 8-bit timers h0 and h1. (k) intp5 this is an external interrupt request input pin for whic h the valid edge (rising edge, falling edge, or both rising and falling edges) can be specified. 2.2.3 p20 to p27 (port 2) p20 to p27 function as an 8-bit i/o port. these pins also function as pins for a/d converter analog input. the following operation modes can be specified in 1-bit units. (1) port mode p20 to p27 function as an 8-bit i/o port. p20 to p27 can be set to input or output por t in 1-bit units using port mode register 2 (pm2). (2) control mode p20 to p27 function as a/d converter analog input pins (ani0 to ani7). when using these pins as analog input pins, see (5) ani0/p20 to ani7/p27 in 12.6 cautions for a/d converter . cautions 1. for the 38-pin products, be sure to set bits 6 and 7 of pm2 to ?1?, and bits 6 and 7 of p2 to ?0?. 2. ani0/p20 to ani7/p27 ar e set in the analog input mode after release of reset. remark 38-pin products: ani0/p20 to ani5/p05 44-pin and 48-pin products: ani0/p20 to ani7/p07 2.2.4 p30 to p33 (port 3) p30 to p33 function as a 4-bit i/o port. these pins also function as pins for external interrupt request input and timer i/o. the following operation modes can be specified in 1-bit units. (1) port mode p30 to p33 function as a 4-bit i/o port. p30 to p33 can be set to input or output port in 1-bit units using port mode register 3 (pm3). use of an on -chip pull-up resistor can be specified by pull-up resistor option register 3 (pu3). (2) control mode p30 to p33 function as external interrupt request input and timer i/o. (a) intp1 to intp4 these are the external interrupt request input pins fo r which the valid edge (rising edge, falling edge, or both rising and falling edges) can be specified. (b) ti51 this is an external count clock input pin to 8-bit timer/event counter 51. chapter 2 pin functions user?s manual u17336ej5v0ud 39 (c) to51 this is a timer output pin from 8-bit timer/event counter 51. cautions 1. in the products with an on-chip debug function ( pd78f0513d and 78f0515d), be sure to pull the p31/intp2/ocd1a note pin down before a reset re lease, to prevent malfunction. 2. for products without an on-chip debug function, with the flash memory of 48 kb or more ( pd78f0514 and 78f0515), and having a product rank of ?i?, ?k?, or ?e?, and for the products with an on-chip debug function ( pd78f0513d and 78f0515d), connect p31/intp2/ocd1a note as follows when writing the fl ash memory with a flash memory programmer. ? p31/intp2/ocd1a note : connect to v ss via a resistor (10 k : recommended). the above connection is not necessary when wr iting the flash memory by means of self programming. note ocd1a is provided to the pd78f0513d and 78f0515d only. remarks 1. for the product ranks, consult an ne c electronics sales representative. 2. only for the pd78f0513d and 78f0515d, p31 and p32 can be used as on-chip debug mode setting pins (ocd1a, ocd1b) when the on-chip debug function is used. for how to connect an in-circuit emulator supporting on-chip debugging (qb-78k0mini or qb-mini2), see chapter 26 on-chip debug function ( pd78f0513d and 78f0515d only). 2.2.5 p40 and p41 (port 4) (44-pin and 48-pin products only) p40 and p41 function as a 2- bit i/o port. p40 and p41 can be set to input or output port in 1- bit units using port mode register 4 (pm4). use of an on-chip pull-up resistor can be specified by pull-up resist or option register 4 (pu4). caution for the 38-pin products, be sure to set bits 0 and 1 of pm4 and p4 to ?0?. 2.2.6 p60 to p63 (port 6) p60 to p63 function as a 4-bit i/o port. these pins also function as pins for serial in terface data i/o, clock i/o, and external clock input. the following operation modes can be specified in 1-bit units. (1) port mode p60 to p63 function as a 4-bit i/o port. p60 to p63 can be se t to input port or output port in 1-bit units using port mode register 6 (pm6). output of p60 to p63 is n-ch open-drain output (6 v tolerance). (2) control mode p60 to p63 function as serial interface dat a i/o, clock i/o, and external clock input. (a) sda0 this is a serial data i/o pin for serial interface iic0. (b) scl0 this is a serial clock i/o pi n for serial interface iic0. chapter 2 pin functions user?s manual u17336ej5v0ud 40 (c) exscl0 this is an external cl ock input pin to serial interface iic0. to input an external clock, input a clock of 6.4 mhz. 2.2.7 p70 to p75 (port 7) p70 to p75 function as a 6-bit i/o port. p70 to p73 also function as key interrupt input pins. the following operation modes can be specified in 1-bit units. (1) port mode p70 to p75 function as a 6-bit i/o port. p70 to p75 can be set to input or output port in 1-bit units using port mode register 7 (pm7). use of an on -chip pull-up resistor can be specified by pull-up resistor option register 7 (pu7). (2) control mode (p70 to p73 only) p70 to p73 function as key interrupt input pins. (a) kr0 to kr3 these are the key interrupt input pins. caution for the 38-pin products, be sure to set bits 2 and 3 of pm7 and p7 to ?0?. remark 38-pin products: p70/kr0, p71/kr1 44-pin products: p70/kr0 to p73/kr3 48-pin products: p70/kr0 to p73/kr3, p74, p75 2.2.8 p120 to p124 (port 12) p120 to p124 function as a 5-bit i/o port. these pins also function as pins for extern al interrupt request input, potential input for external low-voltag e detection, connecting resonator for ma in system clock, connecting resonator for subsystem clock, external clock input for main system clock, and external clock input for subsystem clock. the following operation modes can be specified in 1-bit units. (1) port mode p120 to p124 function as a 5-bit i/o por t. p120 to p124 can be set to input or output port using port mode register 12 (pm12). only for p120, use of an on-chip pull-up resistor can be specifie d by pull-up resistor option register 12 (pu12). (2) control mode p120 to p124 function as pins for external interrupt request input, potential input for external low-voltage detection, connecting resonator for main system clock, connecting resonator for subsystem clock, external clock input for main system clock, and exter nal clock input for subsystem clock. (a) intp0 this functions as an external interrupt request inpu t (intp0) for which the valid edge (rising edge, falling edge, or both rising and falling edges) can be specified. (b) exlvi this is a potential input pin for external low-voltage detection. chapter 2 pin functions user?s manual u17336ej5v0ud 41 (c) x1, x2 these are the pins for connecting a resonator for main system clock. (d) exclk this is an external clock inpu t pin for main system clock. (e) xt1, xt2 these are the pins for connecting a resonator for subsystem clock. (f) exclks this is an external clock in put pin for subsystem clock. caution for products without an on-chi p debug function, with the flash memory of 48 kb or more ( pd78f0514 and 78f0515), and having a product rank of ?i?, ?k?, or ?e?, and for the product with an on-chip debug function ( pd78f0513d and 78f0515d), connect p121/x1/ocd0a note as follows when writing the fl ash memory with a flash memory programmer. ? p121/x1/ocd0a note : when using this pin as a port, connect it to v ss via a resistor (10 k : recommended) (in the input mode) or leave it open (in the output mode). the above connection is not necessary when wr iting the flash memory by means of self programming. note ocd0a is provided to the pd78f0513d and 78f0515d only. remarks 1. for the product ranks, consult an ne c electronics sales representative. 2. only for the pd78f0513d and 78f0515d, x1 and x2 can be used as on-chip debug mode setting pins (ocd0a, ocd0b) when the on-chip debug function is used. for how to connect an in-circuit emulator supporting on-chip debugging (qb-78k0mini or qb-mini2), see chapter 26 on-chip debug function ( pd78f0513d and 78f0515d only). 2.2.9 p130 (port 13) (48-pin products only) p130 functions as a 1-bit output-only port. remark when the device is reset, p130 outputs a low level. therefore, to output a high level from p130 before the device is reset, the output signa l of p130 can be used as a pseudo reset signal of the cpu (see the figure for remark in 4.2.9 port 13 (48 pin products only) ). 2.2.10 p140 (port 14) (48-pin products only) p140 functions as a 1-bit i/o port. this pin also functi ons as external interrupt request input, and clock output. the following operation modes can be specified in 1-bit units. (1) port mode p140 functions as a 1-bit i/o port. p140 can be set to input or output port in 1-bit units using port mode register 14 (pm14). use of an on-chip pull-up resistor can be spec ified by pull-up resistor option register 14 (pu14). (2) control mode p140 functions as external interrupt request input, and clock output. chapter 2 pin functions user?s manual u17336ej5v0ud 42 (a) intp6 this is an external interrupt request input pin for whic h the valid edge (rising edge, falling edge, or both rising and falling edges) can be specified. (b) pcl this is a clock output pin. 2.2.11 av ref this is the a/d converter reference voltage input pin and the positive power supply pin of p20 to p27 and a/d converter. when the a/d converter is not used, connect this pin directly to v dd note . note make the av ref pin the same potential as the v dd pin when port 2 is used as a digital port. 2.2.12 av ss this is the a/d converter ground potenti al pin. even when the a/d converter is not used, always use this pin with the same potential as the v ss pin. 2.2.13 reset this is the active-low system reset input pin. 2.2.14 regc this is the pin for connecting regulator output (2.5 v) stabilization capacitance for internal operation. connect this pin to v ss via a capacitor (0.47 to 1 f: recommended). regc v ss caution keep the wiring length as short as possible for the broken- line part in the above figure. 2.2.15 v dd v dd is the positive power supply pin for pins other than p20 to p27. 2.2.16 v ss v ss is the ground potential pin for pins other than p20 to p27. 2.2.17 flmd0 this is a pin for setting flash memory programming mode. connect flmd0 to v ss in the normal operation mode. in flash memory programming mode, connect this pin to the flash memory programmer. chapter 2 pin functions user?s manual u17336ej5v0ud 43 2.3 pin i/o circuits and recommended connection of unused pins table 2-2 shows the types of pin i/o circuits and the recommended connections of unused pins. see figure 2-1 for the configuration of the i/o circuit of each type. table 2-2. pin i/o circuit types (1/2) pin name i/o circuit type i/o recommended connection of unused pins p00/ti000 p01/ti010/to00 p10/sck10/txd0 p11/si10/rxd0 5-ah p12/so10 p13/txd6 5-ag p14/rxd6 5-ah p15/toh0 5-ag p16/toh1/intp5 p17/ti50/to50 5-ah input: independently connect to v dd or v ss via a resistor. output: leave open. ani0/p20 to ani5/p25 note 1 ani6/p26, ani7/p27 notes 1, 2 11-g chapter 2 pin functions user?s manual u17336ej5v0ud 44 table 2-2. pin i/o circuit types (2/2) pin name i/o circuit type i/o recommended connection of unused pins p70/kr0, p71/kr1 p72/kr0, p73/kr3 note 1 p74, p75 note 2 p120/intp0/exlvi 5-ah input: independently connect to v dd or v ss via a resistor. output: leave open. p121/x1/ocd0a notes 3, 4, 7 p122/x2/exclk/ ocd0b notes 3, 7 p123/xt1 note 3 p124/xt2/exclks note 3 37 i/o input: independently connect to v dd or v ss via a resistor. output: leave open. p130 note 2 3-c output leave open. p140/pcl/intp6 note 2 5-ah i/o input: independently connect to v dd or v ss via a resistor. output: leave open. av ref connect directly to v dd note 5 . av ss ? ? connect directly to v ss . flmd0 38 ? connect to v ss note 6 . reset 2 input connect directly to v dd or via a resistor. notes 1. p72/kr0 and p73/kr3 are for 44- pin and 48-pin products only. 2. p74, p75, p130, and p140/pcl/intp6 are for 48-pin products only. 3. use recommended connection above in i/o port mode (see figure 5-2 format of clock operation mode select register (oscctl) ) when these pins are not used. 4. for products without an on-chip debug functi on, with the flash memory of 48 kb or more ( pd78f0514 and 78f0515), and having a product r ank of ?i?, ?k?, or ?e?, and for the product with an on-chip debug function ( pd78f0513d and 78f0515d), connect p121/x1/ocd0a note 7 as follows when writing the flash memory with a flash memory programmer. ? p121/x1/ocd0a note 7 : when using this pin as a port, connect it to v ss via a resistor (10 k : recommended) (in the input mode) or leave it open (in the output mode). the above connection is not necessary when writi ng the flash memory by means of self programming. 5. make the same potential as the v dd pin when port 2 is used as a digital port. 6. flmd0 is a pin that is used to wr ite data to the flash memory. to re write the data of the flash memory on-board, connect this pin to v ss via a resistor (10 k : recommended). the same applies when executing on-chip debugging with a prod uct with an on-chip debug function ( pd78f0513d and 78f0515d). 7. ocd0a and ocd0b are provided to the pd78f0513d and 78f0515d only. remark for the product ranks, consult an ne c electronics sales representative. chapter 2 pin functions user?s manual u17336ej5v0ud 45 figure 2-1. pin i/o circuit list (1/2) type 2 type 5-ah schmitt-triggered input with hysteresis characteristics in pull-up enable data output disable input enable v dd p-ch v dd p-ch in/out n -ch v ss type 3-c type 11-g v dd p-ch n-ch data out v ss data output disable av ref p-ch in/out n-ch p-ch n-ch series resistor string voltage comparator input enable + _ av ss av ss type 5-ag type 13-p pull-up enable data output disable input enable v dd p-ch v dd p-ch in/out n -ch v ss data output disable input enable in/out n-ch v ss chapter 2 pin functions user?s manual u17336ej5v0ud 46 figure 2-1. pin i/o circuit list (2/2) type 13-ad type 38 data output disable input enable in/out n-ch v ss input enable in type 37 reset reset data output disable input enable v dd p-ch x1, xt1 n -ch v ss data output disable input enable v dd p-ch n -ch v ss p-ch n-ch x2, xt2 user?s manual u17336ej5v0ud 47 chapter 3 cpu architecture 3.1 memory space products in the 78k0/kc2 can access a 64 kb memory sp ace. figures 3-1 to 3-7 show the memory maps. caution regardless of the internal memory capacity, the initial valu es of the internal memory size switching register (ims) and internal expansion ram size switching register (ixs) of all products in the 78k0/kc2 are fixed (ims = cfh, ixs = 0ch). therefore, set the value corresponding to each product as indicated below. table 3-1. set values of internal memo ry size switching register (ims) and internal expansion ram si ze switching register (ixs) flash memory version (78k0/kc2) ims ixs rom capacity internal high-speed ram capacity internal expansion ram capacity pd78f0511 04h 16 kb 768 bytes pd78f0512 c6h 24 kb pd78f0513, 78f0513d note c8h 0ch 32 kb ? pd78f0514 cch 0ah 48 kb 1 kb pd78f0515, 78f0515d note cfh 08h 60 kb 1 kb 2 kb note the rom and ram capacities of the products with the on-chip debug function can be debugged by setting ims and ixs, according to the debug target products . set ims and ixs according to the debug target products. chapter 3 cpu architecture user?s manual u17336ej5v0ud 48 figure 3-1. memory map ( pd78f0511) special function registers (sfr) 256 8 bits internal high-speed ram 768 8 bits general-purpose registers 32 8 bits reserved flash memory 16384 8 bits ffffh ff00h feffh fee0h fedfh fc00h fbffh 4000h 3fffh 0000h program memory space data memory space vector table area 64 x 8 bits callt table area 64 x 8 bits program area 1915 x 8 bits option byte area note 1 5 x 8 bits callf entry area 2048 x 8 bits program area program area option byte area note 1 5 x 8 bits boot cluster 0 note 2 boot cluster 1 0040h 003fh 0000h 0080h 007fh 0800h 07ffh 1000h 0fffh 1085h 1084h 1080h 107fh 0085h 0084h 3fffh 1fffh notes 1. when boot swap is not used: set the option bytes to 0080h to 0084h. when boot swap is used: set the option bytes to 0080h to 0084h and 1080h to 1084h. 2. writing boot cluster 0 can be prohibited depending on the setting of security (see 25.8 security setting ). remark the flash memory is divided into blocks (one block = 1 kb). for the address values and block numbers, see table 3-2 correspondence between address va lues and block numbers in flash memory . block 00h block 01h block 0fh 1 kb 3fffh 07ffh 0000h 0400h 03ffh 3c00h 3bffh chapter 3 cpu architecture user?s manual u17336ej5v0ud 49 figure 3-2. memory map ( pd78f0512) special function registers (sfr) 256 8 bits internal high-speed ram 1024 8 bits general-purpose registers 32 8 bits reserved ffffh ff00h feffh fee0h fedfh fb00h faffh 6000h 5fffh 0000h program memory space data memory space flash memory 24576 8 bits vector table area 64 x 8 bits callt table area 64 x 8 bits program area 1915 x 8 bits option byte area note 1 5 x 8 bits callf entry area 2048 x 8 bits program area program area option byte area note 1 5 x 8 bits boot cluster 0 note 2 boot cluster 1 0040h 003fh 0000h 0080h 007fh 0800h 07ffh 1000h 0fffh 1085h 1084h 1080h 107fh 0085h 0084h 5fffh 1fffh notes 1. when boot swap is not used: set the option bytes to 0080h to 0084h. when boot swap is used: set the option bytes to 0080h to 0084h and 1080h to 1084h. 2. writing boot cluster 0 can be prohibited depending on the setting of security (see 25.8 security setting ). remark the flash memory is divided into blocks (one block = 1 kb). for the address values and block numbers, see table 3-2 correspondence between address va lues and block numbers in flash memory . block 00h block 01h block 17h 1 kb 5fffh 07ffh 0000h 0400h 03ffh 5c00h 5bffh chapter 3 cpu architecture user?s manual u17336ej5v0ud 50 figure 3-3. memory map ( pd78f0513) special function registers (sfr) 256 8 bits internal high-speed ram 1024 8 bits general-purpose registers 32 8 bits reserved flash memory 32768 8 bits ffffh ff00h feffh fee0h fedfh fb00h faffh 8000h 7fffh 0000h program memory space data memory space vector table area 64 x 8 bits callt table area 64 x 8 bits program area 1915 x 8 bits option byte area note 1 5 x 8 bits callf entry area 2048 x 8 bits program area program area option byte area note 1 5 x 8 bits boot cluster 0 note 2 boot cluster 1 0040h 003fh 0000h 0080h 007fh 0800h 07ffh 1000h 0fffh 1085h 1084h 1080h 107fh 0085h 0084h 7fffh 1fffh notes 1. when boot swap is not used: set the option bytes to 0080h to 0084h. when boot swap is used: set the option bytes to 0080h to 0084h and 1080h to 1084h. 2. writing boot cluster 0 can be prohibited depending on the setting of security (see 25.8 security setting ). remark the flash memory is divided into blocks (one block = 1 kb). for the address values and block numbers, see table 3-2 correspondence between address va lues and block numbers in flash memory . block 00h block 01h block 1fh 1 kb 7fffh 07ffh 0000h 0400h 03ffh 7c00h 7bffh chapter 3 cpu architecture user?s manual u17336ej5v0ud 51 figure 3-4. memory map ( pd78f0513d) ffffh ff00h feffh fee0h fedfh fb00h faffh 8000h 7fffh 0000h program memory space data memory space special function registers (sfr) 256 8 bits internal high-speed ram 1024 8 bits general-purpose registers 32 8 bits flash memory 32768 8 bits reserved vector table area 64 x 8 bits callt table area 64 x 8 bits program area 1905 x 8 bits option byte area note 1 5 x 8 bits callf entry area 2048 x 8 bits program area program area option byte area note 1 5 x 8 bits boot cluster 0 note 2 boot cluster 1 0040h 003fh 0000h 0080h 007fh 0800h 07ffh 1000h 0fffh 1085h 1084h 1080h 107fh 0085h 0084h 7fffh 1fffh 108fh 108eh 008fh 008eh on-chip debug security id setting area note 1 10 x 8 bits on-chip debug security id setting area note 1 10 x 8 bits notes 1. when boot swap is not used: set the option bytes to 0080h to 0084h, and the on-chip debug security ids to 0085h to 008eh. when boot swap is used: set the option bytes to 0080h to 0084h and 1080h to 1084h, and the on-chip debug security ids to 0085h to 008eh and 1085h to 108eh. 2. writing boot cluster 0 can be prohibited depending on the setting of security (see 25.8 security setting ). remark the flash memory is divided into blocks (one block = 1 kb). for the address values and block numbers, see table 3-2 correspondence between address va lues and block numbers in flash memory . block 00h block 01h block 1fh 1 kb 7fffh 07ffh 0000h 0400h 03ffh 7c00h 7bffh chapter 3 cpu architecture user?s manual u17336ej5v0ud 52 figure 3-5. memory map ( pd78f0514) special function registers (sfr) 256 8 bits internal high-speed ram 1024 8 bits internal expansion ram 1024 8 bits reserved general-purpose registers 32 8 bits reserved ffffh ff00h feffh fee0h fedfh fb00h faffh f800h f7ffh f400h f3ffh c000h bfffh 0000h program memory space ram space in which instruction can be fetched data memory space flash memory 49152 8 bits vector table area 64 x 8 bits callt table area 64 x 8 bits program area 1915 x 8 bits option byte area note 1 5 x 8 bits callf entry area 2048 x 8 bits program area program area option byte area note 1 5 x 8 bits boot cluster 0 note 2 boot cluster 1 0040h 003fh 0000h 0080h 007fh 0800h 07ffh 1000h 0fffh 1085h 1084h 1080h 107fh 0085h 0084h bfffh 1fffh notes 1. when boot swap is not used: set the option bytes to 0080h to 0084h. when boot swap is used: set the option bytes to 0080h to 0084h and 1080h to 1084h. 2. writing boot cluster 0 can be prohibited depending on the setting of security (see 25.8 security setting ). remark the flash memory is divided into blocks (one block = 1 kb). for the address values and block numbers, see table 3-2 correspondence between address va lues and block numbers in flash memory . block 00h block 01h block 2fh 1 kb bfffh 07ffh 0000h 0400h 03ffh bc00h bbffh chapter 3 cpu architecture user?s manual u17336ej5v0ud 53 figure 3-6. memory map ( pd78f0515) special function registers (sfr) 256 8 bits internal high-speed ram 1024 8 bits internal expansion ram 2048 8 bits general-purpose registers 32 8 bits reserved flash memory 61440 8 bits ffffh ff00h feffh fee0h fedfh fb00h faffh f800h f7ffh f000h efffh 0000h program memory space ram space in which instruction can be fetched data memory space vector table area 64 x 8 bits callt table area 64 x 8 bits program area 1915 x 8 bits option byte area note 1 5 x 8 bits callf entry area 2048 x 8 bits program area program area option byte area note 1 5 x 8 bits boot cluster 0 note 2 boot cluster 1 0040h 003fh 0000h 0080h 007fh 0800h 07ffh 1000h 0fffh 1085h 1084h 1080h 107fh 0085h 0084h efffh 1fffh notes 1. when boot swap is not used: set the option bytes to 0080h to 0084h. when boot swap is used: set the option bytes to 0080h to 0084h and 1080h to 1084h. 2. writing boot cluster 0 can be prohibited depending on the setting of security (see 25.8 security setting ). remark the flash memory is divided into blocks (one block = 1 kb). for the address values and block numbers, see table 3-2 correspondence between address va lues and block numbers in flash memory . block 00h block 01h block 3bh 1 kb efffh 07ffh 0000h 0400h 03ffh ec00h ebffh chapter 3 cpu architecture user?s manual u17336ej5v0ud 54 figure 3-7. memory map ( pd78f0515d) ffffh ff00h feffh fee0h fedfh fb00h faffh f800h f7ffh f000h efffh 0000h program memory space ram space in which instruction can be fetched data memory space special function registers (sfr) 256 8 bits internal high-speed ram 1024 8 bits internal expansion ram 2048 8 bits general-purpose registers 32 8 bits reserved flash memory 61440 8 bits vector table area 64 x 8 bits callt table area 64 x 8 bits program area 1905 x 8 bits option byte area note 1 5 x 8 bits callf entry area 2048 x 8 bits program area program area option byte area note 1 5 x 8 bits boot cluster 0 note 2 boot cluster 1 0040h 003fh 0000h 0080h 007fh 0800h 07ffh 1000h 0fffh 1085h 1084h 1080h 107fh 0085h 0084h efffh 1fffh 108fh 108eh 008fh 008eh on-chip debug security id setting area note 1 10 x 8 bits on-chip debug security id setting area note1 10 x 8 bits notes 1. when boot swap is not used: set the option bytes to 0080h to 0084h, and the on-chip debug security ids to 0085h to 008eh. when boot swap is used: set the option bytes to 0080h to 0084h and 1080h to 1084h, and the on-chip debug security ids to 0085h to 008eh and 1085h to 108eh. 2. writing boot cluster 0 can be prohibited depending on the setting of security (see 25.8 security setting ). remark the flash memory is divided into blocks (one block = 1 kb). for the address values and block numbers, see table 3-2 correspondence between address va lues and block numbers in flash memory . block 00h block 01h block 3bh 1 kb efffh 07ffh 0000h 0400h 03ffh ec00h ebffh chapter 3 cpu architecture user?s manual u17336ej5v0ud 55 correspondence between the address values and block numbers in the flash memory are shown below. table 3-2. correspondence between address values and block number s in flash memory address value block number address value block number address value block number address value block number 0000h to 03ffh 00h 4000h to 43ffh 10h 8000h to 83ffh 20h c000h to c3ffh 30h 0400h to 07ffh 01h 4400h to 47ffh 11h 8400h to 87ffh 21h c400h to c7ffh 31h 0800h to 0bffh 02h 4800h to 4bffh 12h 8800h to 8bffh 22h c800h to cbffh 32h 0c00h to 0fffh 03h 4c00h to 4fffh 13h 8c00h to 8fffh 23h cc00h to cfffh 33h 1000h to 13ffh 04h 5000h to 53ffh 14h 9000h to 93ffh 24h d000h to d3ffh 34h 1400h to 17ffh 05h 5400h to 57ffh 15h 9400h to 97ffh 25h d400h to d7ffh 35h 1800h to 1bffh 06h 5800h to 5bffh 16h 9800h to 9bffh 26h d800h to dbffh 36h 1c00h to 1fffh 07h 5c00h to 5fffh 17h 9c00h to 9fffh 27h dc00h to dfffh 37h 2000h to 23ffh 08h 6000h to 63ffh 18h a000h to a3ffh 28h e000h to e3ffh 38h 2400h to 27ffh 09h 6400h to 67ffh 19h a400h to a7ffh 29h e400h to e7ffh 39h 2800h to 2bffh 0ah 6800h to 6bffh 1ah a800h to abffh 2ah e800h to ebffh 3ah 2c00h to 2fffh 0bh 6c00h to 6fffh 1bh ac00h to afffh 2bh ec00h to efffh 3bh 3000h to 33ffh 0ch 7000h to 73ffh 1ch b000h to b3ffh 2ch 3400h to 37ffh 0dh 7400h to 77ffh 1dh b400h to b7ffh 2dh 3800h to 3bffh 0eh 7800h to 7bffh 1eh b800h to bbffh 2eh 3c00h to 3fffh 0fh 7c00h to 7fffh 1fh bc00h to bfffh 2fh remark pd78f0511: block numbers 00h to 0fh pd78f0512: block numbers 00h to 17h pd78f0513, 78f0513d: block numbers 00h to 1fh pd78f0514: block numbers 00h to 2fh pd78f0515, 78f0515d: block numbers 00h to 3bh chapter 3 cpu architecture user?s manual u17336ej5v0ud 56 3.1.1 internal program memory space the internal program memory space stores the program and table data. normally, it is addressed with the program counter (pc). 78k0/kc2 products incorporate internal rom (flash memory), as shown below. table 3-3. intern al rom capacity internal rom part number structure capacity pd78f0511 16384 8 bits (0000h to 3fffh) pd78f0512 24576 8 bits (0000h to 5fffh) pd78f0513, 78f0513d 32768 8 bits (0000h to 7fffh) pd78f0514 49152 8 bits (0000h to bfffh) pd78f0515, 78f0515d flash memory 61440 8 bits (0000h to efffh) the internal program memory space is divided into the following areas. (1) vector table area the 64-byte area 0000h to 003fh is reserved as a vect or table area. the program start addresses for branch upon reset or generation of each interrupt reques t are stored in the vector table area. of the 16-bit address, the lower 8 bits are stored at ev en addresses and the higher 8 bits are stored at odd addresses. table 3-4. vector table vector table address interrupt source vector table address interrupt source 0000h reset input, poc, lvi, wdt 001ch inttmh0 0004h intlvi 001eh inttm50 0006h intp0 0020h inttm000 0008h intp1 0022h inttm010 000ah intp2 0024h intad 000ch intp3 0026h intsr0 000eh intp4 0028h intwti 0010h intp5 002ah inttm51 0012h intsre6 002ch intkr 0014h intsr6 002eh intwt 0016h intst6 0030h intp6 note 1 0018h intcsi10/intst0 0034h intiic0/intdmu note 2 001ah inttmh1 003eh brk notes 1. available only in the 48-pin products. 2. available only in the pd78f0514, 78f0515, and 78f0515d. chapter 3 cpu architecture user?s manual u17336ej5v0ud 57 (2) callt instruction table area the 64-byte area 0040h to 007fh can st ore the subroutine entry address of a 1-byte call instruction (callt). (3) option byte area a 5-byte area of 0080h to 0084h and 1080h to 1084h can be used as an option byte ar ea. set the option byte at 0080h to 0084h when the boot swap is not used, and at 0080h to 0084h and 1080h to 1084h when the boot swap is used. for details, see chapter 24 option byte . (4) callf instruction entry area the area 0800h to 0fffh can perform a direct subrout ine call with a 2-byte ca ll instruction (callf). (5) on-chip debug security id setting area ( pd78f0513d and 78f0515d only) a 10-byte area of 0085h to 008eh and 1085h to 108eh can be used as an on-chip debug security id setting area. set the on-chip debug security id of 10 bytes at 0085h to 008eh when the boot swap is not used and at 0085h to 008eh and 1085h to 108eh when the boot swap is used. for details, see chapter 26 on-chip debug function ( pd78f0513d and 78f0515d only) . chapter 3 cpu architecture user?s manual u17336ej5v0ud 58 3.1.2 internal data memory space 78k0/kc2 products incorporate the following rams. (1) internal high-speed ram table 3-5. internal high-speed ram capacity part number internal high-speed ram pd78f0511 768 8 bits (fc00h to feffh) pd78f0512 pd78f0513, 78f0513d pd78f0514 pd78f0515, 78f0515d 1024 8 bits (fb00h to feffh) the 32-byte area fee0h to feffh is assigned to four g eneral-purpose register banks consisting of eight 8-bit registers per bank. this area cannot be used as a program area in which instructions are written and executed. the internal high-speed ram can also be used as a stack memory. (2) internal expansion ram table 3-6. internal expansion ram capacity part number internal expansion ram pd78f0511 pd78f0512 pd78f0513, 78f0513d ? pd78f0514 1024 8 bits (f400h to f7ffh) pd78f0515, 78f0515d 2048 8 bits (f000h to f7ffh) the internal expansion ram can also be used as a normal data area similar to the internal high-speed ram, as well as a program area in which inst ructions can be written and executed. the internal expansion ram cannot be used as a stack memory. chapter 3 cpu architecture user?s manual u17336ej5v0ud 59 3.1.3 special function register (sfr) area on-chip peripheral hard ware special function registers (sfrs) ar e allocated in the area ff00h to ffffh (see table 3-7 special function register list in 3.2.3 special func tion registers (sfrs) ). caution do not access addresses to which sfrs are not assigned. 3.1.4 data memory addressing addressing refers to the method of specifying the address of the instruction to be ex ecuted next or the address of the register or memory relevant to the execution of instructions. several addressing modes are provided for addressing the memo ry relevant to the executi on of instructions for the 78k0/kc2, based on operability and other c onsiderations. for areas containing da ta memory in particular, special addressing methods designed for the functions of special function registers (sfr) and general-purpose registers are available for use. figures 3-8 to 3-14 show correspondence between data memory and addressing. for details of each addressing mode, see 3.4 operand address addressing . chapter 3 cpu architecture user?s manual u17336ej5v0ud 60 figure 3-8. correspondence between data memory and addressing ( pd78f0511) special function registers (sfr) 256 8 bits short direct addressing sfr addressing ffffh ff20h ff1fh 0000h ff00h feffh fee0h fedfh fe20h fe1fh fc00h fbffh 4000h 3fffh internal high-speed ram 768 8 bits general-purpose registers 32 8 bits reserved flash memory 16384 8 bits register addressing direct addressing register indirect addressing based addressing based indexed addressing chapter 3 cpu architecture user?s manual u17336ej5v0ud 61 figure 3-9. correspondence between data memory and addressing ( pd78f0512) special function registers (sfr) 256 8 bits short direct addressing sfr addressing ffffh ff20h ff1fh 0000h ff00h feffh fee0h fedfh fe20h fe1fh fb00h faffh 6000h 5fffh internal high-speed ram 1024 8 bits general-purpose registers 32 8 bits reserved flash memory 24576 8 bits register addressing direct addressing register indirect addressing based addressing based indexed addressing chapter 3 cpu architecture user?s manual u17336ej5v0ud 62 figure 3-10. correspondence between data memory and addressing ( pd78f0513 and 78f0513d) special function registers (sfr) 256 8 bits short direct addressing sfr addressing ffffh ff20h ff1fh 0000h ff00h feffh fee0h fedfh fe20h fe1fh fb00h faffh 8000h 7fffh internal high-speed ram 1024 8 bits general-purpose registers 32 8 bits reserved flash memory 32768 8 bits register addressing direct addressing register indirect addressing based addressing based indexed addressing chapter 3 cpu architecture user?s manual u17336ej5v0ud 63 figure 3-11 . correspondence between data memory and addressing ( pd78f0514) special function registers (sfr) 256 8 bits short direct addressing sfr addressing ffffh ff20h ff1fh 0000h ff00h feffh fee0h fedfh fe20h fe1fh c000h bfffh internal high-speed ram 1024 8 bits general-purpose registers 32 8 bits reserved flash memory 49152 8 bits register addressing direct addressing register indirect addressing based addressing based indexed addressing f800h f7ffh f400h f3ffh fb00h faffh internal expansion ram 1024 8 bits reserved chapter 3 cpu architecture user?s manual u17336ej5v0ud 64 figure 3-12. correspondence between data memory and addressing ( pd78f0515 and 78f0515d) special function registers (sfr) 256 8 bits short direct addressing sfr addressing ffffh ff20h ff1fh 0000h ff00h feffh fee0h fedfh fe20h fe1fh f000h efffh internal high-speed ram 1024 8 bits general-purpose registers 32 8 bits reserved flash memory 61440 8 bits register addressing direct addressing register indirect addressing based addressing based indexed addressing f800h f7ffh fb00h faffh internal expansion ram 2048 8 bits chapter 3 cpu architecture user?s manual u17336ej5v0ud 65 3.2 processor registers the 78k0/kc2 products incorporate t he following processor registers. 3.2.1 control registers the control registers control the program sequence, statuses and stack memory. the control registers consist of a program counter (pc), a program status word (psw) and a stack pointer (sp). (1) program counter (pc) the program counter is a 16-bit regist er that holds the address information of the next program to be executed. in normal operation, pc is automatically incremented acco rding to the number of byte s of the instruction to be fetched. when a branch instruction is execut ed, immediate data and regi ster contents are set. reset signal generation sets the reset vector table va lues at addresses 0000h and 0001h to the program counter. figure 3-13. format of program counter 15 pc pc15 pc14 pc13 pc12 pc11 pc10 pc9 pc8 pc7 pc6 pc5 pc4 pc3 pc2 pc1 pc0 0 (2) program status word (psw) the program status word is an 8-bit r egister consisting of various flags set/reset by instruction execution. program status word contents are stored in the stack area upon interr upt request generation or push psw instruction execution and are re stored upon execution of the retb , reti and pop psw instructions. reset signal generation sets psw to 02h. figure 3-14. format of program status word ie z rbs1 ac rbs0 isp cy 70 0 psw (a) interrupt enable flag (ie) this flag controls the interrupt reques t acknowledge operations of the cpu. when 0, the ie flag is set to the interrupt disabled (di) state, and all maskable interrupt requests are disabled. when 1, the ie flag is set to the interrupt enabled (ei) state and interrupt request acknowledgment is controlled with an in-service priority flag (isp), an in terrupt mask flag for various interrupt sources, and a priority specification flag. the ie flag is reset (0) upon di instruction executi on or interrupt acknowledgment and is set (1) upon ei instruction execution. chapter 3 cpu architecture user?s manual u17336ej5v0ud 66 (b) zero flag (z) when the operation result is zero, this flag is se t (1). it is reset (0 ) in all other cases. (c) register bank select flags (rbs0 and rbs1) these are 2-bit flags to select one of the four register banks. in these flags, the 2-bit information that indicates t he register bank selected by sel rbn instruction execution is stored. (d) auxiliary carry flag (ac) if the operation result has a carry from bit 3 or a borrow at bi t 3, this flag is set (1). it is reset (0) in all other cases. (e) in-service priority flag (isp) this flag manages the priority of acknowledgeable ma skable vectored interrupts. when this flag is 0, low- level vectored interrupt requests specified by a priority specification flag register (pr0l, pr0h, pr1l, pr1h) (see 18.3 (3) priority specifi cation flag registers (pr0l, pr0h, pr1l, pr1h) ) can not be acknowledged. actual request acknowledgment is contro lled by the interrupt enable flag (ie). (f) carry flag (cy) this flag stores overflow and underflow upon add/subtract instruction execution. it stores the shift-out value upon rotate instruction execution and functions as a bit accumulator during bit operation instruction execution. (3) stack pointer (sp) this is a 16-bit register to hold the start address of t he memory stack area. only the internal high-speed ram area can be set as the stack area. figure 3-15. format of stack pointer 15 sp sp15 sp14 sp13 sp12 sp11 sp10 sp9 sp8 sp7 sp6 sp5 sp4 sp3 sp2 sp1 sp0 0 the sp is decremented ahead of write (save) to the stack memory and is incremented after read (restored) from the stack memory. each stack operation saves/restores dat a as shown in figures 3-16 and 3-17. caution since reset signal genera tion makes the sp contents undefined, be sure to initialize the sp before using the stack. chapter 3 cpu architecture user?s manual u17336ej5v0ud 67 figure 3-16. data to be saved to stack memory (a) push rp instruction (when sp = fee0h) register pair lower fee0h sp sp fee0h fedfh fedeh register pair higher fedeh (b) call, callf, callt instructions (when sp = fee0h) pc15 to pc8 fee0h sp sp fee0h fedfh fedeh pc7 to pc0 fedeh (c) interrupt, brk instruct ions (when sp = fee0h) pc15 to pc8 psw fedfh fee0h sp sp fee0h fedeh feddh pc7 to pc0 feddh chapter 3 cpu architecture user?s manual u17336ej5v0ud 68 figure 3-17. data to be restored from stack memory (a) pop rp instruction (when sp = fedeh) register pair lower fee0h sp sp fee0h fedfh fedeh register pair higher fedeh (b) ret instruction (when sp = fedeh) pc15 to pc8 fee0h sp sp fee0h fedfh fedeh pc7 to pc0 fedeh (c) reti, retb instructions (when sp = feddh) pc15 to pc8 psw fedfh fee0h sp sp fee0h fedeh feddh pc7 to pc0 feddh chapter 3 cpu architecture user?s manual u17336ej5v0ud 69 3.2.2 general-purpose registers general-purpose registers are mapp ed at particular addresses (fee0h to feffh) of the data memory. the general-purpose registers consists of 4 bank s, each bank consisting of eight 8-bit r egisters (x, a, c, b, e, d, l, and h). each register can be used as an 8-bit register, and two 8-bit r egisters can also be used in a pair as a 16-bit register (ax, bc, de, and hl). these registers can be described in terms of function names (x, a, c, b, e, d, l, h, ax, bc, de, and hl) and absolute names (r0 to r7 and rp0 to rp3). register banks to be used for instructi on execution are set by the cpu control instruction (sel rbn). because of the 4-register bank configuration, an efficient program ca n be created by switching between a register for normal processing and a register for interrupts for each bank. figure 3-18. configuration of general-purpose registers (a) function name register bank 0 register bank 1 register bank 2 register bank 3 feffh fef8h fee0h hl de bc ax h 15 0 7 0 l d e b c a x 16-bit processing 8-bit processing fef0h fee8h (b) absolute name register bank 0 register bank 1 register bank 2 register bank 3 feffh fef8h fee0h rp3 rp2 rp1 rp0 r7 15 0 7 0 r6 r5 r4 r3 r2 r1 r0 16-bit processing 8-bit processing fef0h fee8h chapter 3 cpu architecture user?s manual u17336ej5v0ud 70 3.2.3 special function registers (sfrs) unlike a general-purpose register, each special f unction register has a special function. sfrs are allocated to the ff00h to ffffh area. special function registers can be manipulated like general -purpose registers, using o peration, transfer, and bit manipulation instructions. the manipulatable bit units, 1, 8, and 16, depend on the spec ial function register type. each manipulation bit unit can be specified as follows. ? 1-bit manipulation describe the symbol reserved by the assembler for the 1-bit manipulation instruction operand (sfr.bit). this manipulation can also be specified with an address. ? 8-bit manipulation describe the symbol reserved by the assembler fo r the 8-bit manipulation instruction operand (sfr). this manipulation can also be specified with an address. ? 16-bit manipulation describe the symbol reserved by the assembler fo r the 16-bit manipulation instruction operand (sfrp). when specifying an address, describe an even address. table 3-7 gives a list of the special f unction registers. the meanings of items in the table are as follows. ? symbol symbol indicating the address of a special function regist er. it is a reserved word in the ra78k0, and is defined as an sfr variable using the #pragma sfr directive in the cc78k0. when using the ra78k0, id78k0-qb, and sm+ for 78k0/kx2, symbols can be wr itten as an instruction operand. ? r/w indicates whether the corresponding special f unction register can be read or written. r/w: read/write enable r: read only w: write only ? manipulatable bit units indicates the manipulatable bit unit (1, 8, or 16). ? ? ? indicates a bit unit for which manipulation is not possible. ? after reset indicates each register status upon reset signal generation. chapter 3 cpu architecture user?s manual u17336ej5v0ud 71 table 3-7. special function register list (1/4) manipulatable bit unit address special function regist er (sfr) name symbol r/w 1 bit 8 bits 16 bits after reset ff00h port register 0 p0 r/w ? 00h ff01h port register 1 p1 r/w ? 00h ff02h port register 2 p2 r/w ? 00h ff03h port register 3 p3 r/w ? 00h ff04h port register 4 p4 r/w ? 00h ff06h port register 6 p6 r/w ? 00h ff07h port register 7 p7 r/w ? 00h ff08h 10-bit a/d conversion result register adcr r ? ? 0000h ff09h 8-bit a/d conversion result register adcrh r ? ? 00h ff0ah receive buffer register 6 rxb6 r ? ? ffh ff0bh transmit buffer register 6 txb6 r/w ? ? ffh ff0ch port register 12 p12 r/w ? 00h ff0dh port register 13 note p13 r/w ? 00h ff0eh port register 14 note p14 r/w ? 00h ff0fh serial i/o shift register 10 sio10 r ? ? 00h ff10h ff11h 16-bit timer counter 00 tm00 r ? ? 0000h ff12h ff13h 16-bit timer capture/compare register 000 cr000 r/w ? ? 0000h ff14h ff15h 16-bit timer capture/compare register 010 cr010 r/w ? ? 0000h ff16h 8-bit timer counter 50 tm50 r ? ? 00h ff17h 8-bit timer compare register 50 cr50 r/w ? ? 00h ff18h 8-bit timer h compare register 00 cmp00 r/w ? ? 00h ff19h 8-bit timer h compare register 10 cmp10 r/w ? ? 00h ff1ah 8-bit timer h compare register 01 cmp01 r/w ? ? 00h ff1bh 8-bit timer h compare register 11 cmp11 r/w ? ? 00h ff1fh 8-bit timer counter 51 tm51 r ? ? 00h ff20h port mode register 0 pm0 r/w ? ffh ff21h port mode register 1 pm1 r/w ? ffh ff22h port mode register 2 pm2 r/w ? ffh ff23h port mode register 3 pm3 r/w ? ffh ff24h port mode register 4 pm4 r/w ? ffh ff26h port mode register 6 pm6 r/w ? ffh ff27h port mode register 7 pm7 r/w ? ffh ff28h a/d converter mode register adm r/w ? 00h ff29h analog input channel specification register ads r/w ? 00h ff2ch port mode register 12 pm12 r/w ? ffh ff2eh port mode register 14 note pm14 r/w ? ffh ff2fh a/d port configuration register adpc r/w ? 00h note available only in the 48-pin products. chapter 3 cpu architecture user?s manual u17336ej5v0ud 72 table 3-7. special function register list (2/4) manipulatable bit unit address special function regist er (sfr) name symbol r/w 1 bit 8 bits 16 bits after reset ff30h pull-up resistor option register 0 pu0 r/w ? 00h ff31h pull-up resistor option register 1 pu1 r/w ? 00h ff33h pull-up resistor option register 3 pu3 r/w ? 00h ff34h pull-up resistor option register 4 pu4 r/w ? 00h ff37h pull-up resistor option register 7 pu7 r/w ? 00h ff3ch pull-up resistor option register 12 pu12 r/w ? 00h ff3eh pull-up resistor option register 14 note 1 pu14 r/w ? 00h ff40h clock output selection register note 1 cks r/w ? 00h ff41h 8-bit timer compare register 51 cr51 r/w ? ? 00h ff43h 8-bit timer mode control register 51 tmc51 r/w ? 00h ff48h external interrupt risi ng edge enable register egp r/w ? 00h ff49h external interrupt fa lling edge enable register egn r/w ? 00h ff4fh input switch control register isc r/w ? 00h ff50h asynchronous serial interface operation mode register 6 asim6 r/w ? 01h ff53h asynchronous serial interface reception error status register 6 asis6 r ? ? 00h ff55h asynchronous serial interface transmission status register 6 asif6 r ? ? 00h ff56h clock selection register 6 cksr6 r/w ? ? 00h ff57h baud rate generator control register 6 brgc6 r/w ? ? ffh ff58h asynchronous serial interface control register 6 asicl6 r/w ? 16h ff60h sdr0l ? 00h ff61h remainder data register 0 note 2 sdr0 sdr0h r ? 00h ff62h mda0ll ? 00h ff63h mda0l mda0lh r/w ? 00h ff64h mda0hl ? 00h ff65h multiplication/division data register a0 note 2 mda0h mda0hh r/w ? 00h ff66h mdb0l ? 00h ff67h multiplication/division data register b0 note 2 mdb0 mdb0h r/w ? 00h ff68h multiplier/divider control register 0 note 2 dmuc0 r/w ? 00h ff69h 8-bit timer h mode register 0 tmhmd0 r/w ? 00h ff6ah timer clock selection register 50 tcl50 r/w ? 00h ff6bh 8-bit timer mode control register 50 tmc50 r/w ? 00h ff6ch 8-bit timer h mode register 1 tmhmd1 r/w ? 00h ff6dh 8-bit timer h carrier control register 1 tmcyc1 r/w ? 00h ff6eh key return mode register krm r/w ? 00h ff6fh watch timer operation mode register wtm r/w ? 00h ff70h asynchronous serial interface operation mode register 0 asim0 r/w ? 01h notes 1. available only in the 48-pin products. 2. available only in the pd78f0514, 78f0515, and 78f0515d. chapter 3 cpu architecture user?s manual u17336ej5v0ud 73 table 3-7. special function register list (3/4) manipulatable bit unit address special function regist er (sfr) name symbol r/w 1 bit 8 bits 16 bits after reset ff71h baud rate generator control register 0 brgc0 r/w ? ? 1fh ff72h receive buffer register 0 rxb0 r ? ? ffh ff73h asynchronous serial interface reception error status register 0 asis0 r ? ? 00h ff74h transmit shift register 0 txs0 w ? ? ffh ff80h serial operation mode register 10 csim10 r/w ? 00h ff81h serial clock select ion register 10 csic10 r/w ? 00h ff84h transmit buffer register 10 sotb10 r/w ? ? 00h ff8ch timer clock selection register 51 tcl51 r/w ? 00h ff99h watchdog timer enable register wdte r/w ? ? note 1 1ah/9ah ff9fh clock operation mode select register oscctl r/w ? 00h ffa0h internal oscillation mode register rcm r/w ? 80h note 2 ffa1h main clock mode register mcm r/w ? 00h ffa2h main osc control register moc r/w ? 80h ffa3h oscillation stabilization time counter status register ostc r ? 00h ffa4h oscillation stabilization time select register osts r/w ? ? 05h ffa5h iic shift register 0 iic0 r/w ? ? 00h ffa6h iic control register 0 iicc0 r/w ? 00h ffa7h slave address register 0 sva0 r/w ? ? 00h ffa8h iic clock selection register 0 iiccl0 r/w ? 00h ffa9h iic function expansion register 0 iicx0 r/w ? 00h ffaah iic status register 0 iics0 r ? 00h ffabh iic flag register 0 iicf0 r/w ? 00h ffach reset control flag register resf r ? ? 00h note 3 ffbah 16-bit timer mode control register 00 tmc00 r/w ? 00h ffbbh prescaler mode register 00 prm00 r/w ? 00h ffbch capture/compare control register 00 crc00 r/w ? 00h ffbdh 16-bit timer output control register 00 toc00 r/w ? 00h ffbeh low-voltage detection register lvim r/w ? 00h note 3 ffbfh low-voltage detection level selection register lvis r/w ? 00h note 3 ffe0h interrupt request flag register 0l if0 if0l r/w 00h ffe1h interrupt request flag register 0h if0h r/w 00h ffe2h interrupt request flag register 1l if1 if1l r/w 00h ffe3h interrupt request flag register 1h if1h r/w 00h ffe4h interrupt mask flag register 0l mk0 mk0l r/w ffh ffe5h interrupt mask flag register 0h mk0h r/w ffh notes 1. the reset value of wdte is determined by setting of option byte. 2. the value of this register is 00h immediately afte r a reset release but automatically changes to 80h after oscillation accuracy stabilization of hi gh-speed internal oscillator has been waited. 3. the reset values of resf, lvim, and lvis vary depending on the reset source. chapter 3 cpu architecture user?s manual u17336ej5v0ud 74 table 3-7. special function register list (4/4) manipulatable bit unit address special function regist er (sfr) name symbol r/w 1 bit 8 bits 16 bits after reset ffe6h interrupt mask flag register 1l mk1 mk1l r/w ffh ffe7h interrupt mask flag register 1h mk1h r/w ffh ffe8h priority specification flag register 0l pr0 pr0l r/w ffh ffe9h priority specification flag register 0h pr0h r/w ffh ffeah priority specification flag register 1l pr1 pr1l r/w ffh ffebh priority specification flag register 1h pr1h r/w ffh fff0h internal memory size switching register note 1 ims r/w ? ? cfh fff4h internal expansion ram size switching register note 1 ixs r/w ? ? 0ch fffbh processor clock control register pcc r/w ? 01h notes 1. regardless of the internal memory c apacity, the initial values of the inte rnal memory size switching register (ims) and internal expansion ram size switching register (ixs) of all products in the 78k0/kc2 are fixed (ims = cfh, ixs = 0ch). therefore, set the value corresponding to each product as indicated below. flash memory version (78k0/kc2) ims ixs rom capacity internal high-speed ram capacity internal expansion ram capacity pd78f0511 04h 16 kb 768 bytes pd78f0512 c6h 24 kb pd78f0513, 78f0513d note 2 c8h 0ch 32 kb ? pd78f0514 cch 0ah 48 kb 1 kb pd78f0515, 78f0515d note 2 cfh 08h 60 kb 1 kb 2 kb 2. the rom and ram capacities of t he products with the on-chip debug function can be debugged by setting ims and ixs, according to the debug target products . set ims and ixs according to the debug target products. chapter 3 cpu architecture user?s manual u17336ej5v0ud 75 3.3 instruction address addressing an instruction address is determined by contents of the program counter (pc), and is normally incremented (+1 for each byte) automatically according to the number of bytes of an instruction to be fetched each time another instruction is executed. when a branch instruction is executed, the branch destination information is set to pc and branched by the following addressing (for details of instructions, refer to the 78k/0 series instructions user?s manual (u12326e) ). 3.3.1 relative addressing [function] the value obtained by adding 8-bit immediate data (displ acement value: jdisp8) of an instruction code to the start address of the following instruction is transfe rred to the program counter (pc) and branched. the displacement value is treated as signed two?s complement data ( ? 128 to +127) and bit 7 becomes a sign bit. in other words, relative addressing consists of relati ve branching from the start address of the following instruction to the ? 128 to +127 range. this function is carried out when the br $addr16 instruct ion or a conditional branch instruction is executed. [illustration] 15 0 pc + 15 0 876 s 15 0 pc jdisp8 when s = 0, all bits of are 0. when s = 1, all bits of are 1. pc indicates the start address of the instruction after the br instruction. ... chapter 3 cpu architecture user?s manual u17336ej5v0ud 76 3.3.2 immediate addressing [function] immediate data in the instruction word is tran sferred to the program counter (pc) and branched. this function is carried out when the call !addr16 or br !addr16 or callf !addr11 instruction is executed. call !addr16 and br !addr16 instructions can be branched to the entire memory space. the callf !addr11 instruction is br anched to the 0800h to 0fffh area. [illustration] in the case of call !addr16 and br !addr16 instructions 15 0 pc 87 70 call or br low addr. high addr. in the case of callf !addr11 instruction 15 0 pc 87 70 fa 10?8 11 10 00001 643 callf fa 7?0 chapter 3 cpu architecture user?s manual u17336ej5v0ud 77 3.3.3 table indirect addressing [function] table contents (branch destinat ion address) of the particular location to be addressed by bits 1 to 5 of the immediate data of an operation co de are transferred to the progr am counter (pc) and branched. this function is carried out when the ca llt [addr5] instruction is executed. this instruction references the address stored in the me mory table from 40h to 7fh, and allows branching to the entire memory space. [illustration] 15 1 15 0 pc 70 low addr. high addr. memory (table) effective address+1 effective address 01 00000000 87 87 65 0 0 1 11 765 10 ta 4?0 operation code 3.3.4 register addressing [function] register pair (ax) contents to be spec ified with an instruction word are trans ferred to the program counter (pc) and branched. this function is carried out when t he br ax instruction is executed. [illustration] 70 rp 07 ax 15 0 pc 87 chapter 3 cpu architecture user?s manual u17336ej5v0ud 78 3.4 operand address addressing the following methods are available to specify the r egister and memory (addressing) to undergo manipulation during instruction execution. 3.4.1 implied addressing [function] the register that functions as an accumulator (a and ax) among the general-purpose registers is automatically (implicitly) addressed. of the 78k0/kc2 instruction words, the followi ng instructions employ implied addressing. instruction register to be s pecified by implied addressing mulu a register for multiplicand and ax register for product storage divuw ax register for dividend and quotient storage adjba/adjbs a register for storage of numeric va lues that become decimal correction targets ror4/rol4 a register for storage of di git data that undergoes digit rotation [operand format] because implied addressing can be automatically determined with an instruction, no particular operand format is necessary. [description example] in the case of mulu x with an 8-bit 8-bit multiply instruction, the pr oduct of a register and x register is stored in ax. in this example, the a and ax registers are specified by implied addressing. chapter 3 cpu architecture user?s manual u17336ej5v0ud 79 3.4.2 register addressing [function] the general-purpose register to be specified is accesse d as an operand with the regi ster bank select flags (rbs0 to rbs1) and the register s pecify codes of an operation code. register addressing is carried out when an instruction wi th the following operand format is executed. when an 8-bit register is specified, one of the eight registers is specified with 3 bits in the operation code. [operand format] identifier description r x, a, c, b, e, d, l, h rp ax, bc, de, hl ?r? and ?rp? can be described by absolute names (r0 to r7 and rp0 to rp3) as well as function names (x, a, c, b, e, d, l, h, ax, bc, de, and hl). [description example] mov a, c; when selecting c register as r operation code 0 1 1 0 0 0 1 0 register specify code incw de; when selecting de register pair as rp operation code 1 0 0 0 0 1 0 0 register specify code chapter 3 cpu architecture user?s manual u17336ej5v0ud 80 3.4.3 direct addressing [function] the memory to be manipulated is directly addressed with immediate data in an instruction word becoming an operand address. [operand format] identifier description addr16 label or 16-bit immediate data [description example] mov a, !0fe00h; when setting !addr16 to fe00h operation code 10001110 op c ode 00000000 00h 11111110 feh [illustration] memory 0 7 addr16 (lower) addr16 (upper) op code chapter 3 cpu architecture user?s manual u17336ej5v0ud 81 3.4.4 short direct addressing [function] the memory to be manipulated in the fixed space is di rectly addressed with 8-bit data in an instruction word. this addressing is applied to the 256-byte space fe20h to ff1fh. internal high-speed ram and special function registers (sfrs) are mapped at fe20h to feffh and ff00h to ff1fh, respectively. the sfr area (ff00h to ff1fh) where short direct addressing is applied is a part of the overall sfr area. ports that are frequently accessed in a program and compare and capture regi sters of the timer/event counter are mapped in this area, allowing sfrs to be mani pulated with a small number of bytes and clocks. when 8-bit immediate data is at 20h to ffh, bit 8 of an effe ctive address is set to 0. when it is at 00h to 1fh, bit 8 is set to 1. see the [illustration] shown below. [operand format] identifier description saddr immediate data that indicate label or fe20h to ff1fh saddrp immediate data that indicate label or fe20h to ff1fh (even address only) [description example] lb1 equ 0fe30h ; defines fe30h by lb1. : mov lb1, a ; when lb1 indicates fe30h of the saddr ar ea and the value of register a is transferred to that address operation code 1 1 1 1 0 0 1 0 op code 0 0 1 1 0 0 0 0 30h (saddr-offset) [illustration] 15 0 short direct memory effective address 1 111111 87 0 7 op code saddr-offset when 8-bit immediate data is 20h to ffh, = 0 when 8-bit immediate data is 00h to 1fh, = 1 chapter 3 cpu architecture user?s manual u17336ej5v0ud 82 3.4.5 special function register (sfr) addressing [function] a memory-mapped special function register (sfr) is addre ssed with 8-bit immediate data in an instruction word. this addressing is applied to the 240-byte spaces ff00h to ffcfh and ffe0h to ffff h. however, the sfrs mapped at ff00h to ff1fh can be ac cessed with short direct addressing. [operand format] identifier description sfr special function register name sfrp 16-bit manipulatable special func tion register name (even address only) [description example] mov pm0, a; when selecting pm0 (ff20h) as sfr operation code 1 1110110 op c ode 0 0100000 20h (sfr-offset) [illustration] 15 0 sfr effective address 1 111111 87 0 7 op code sfr-offset 1 chapter 3 cpu architecture user?s manual u17336ej5v0ud 83 3.4.6 register indirect addressing [function] register pair contents specified by a register pair spec ify code in an instruction word and by a register bank select flag (rbs0 and rbs1) serve as an operand address for addressing the memory. [operand format] identifier description ? [de], [hl] [description example] mov a, [de]; when selecting [de] as register pair operation code 1 0 0 0 0 1 0 1 [illustration] 16 0 8 d 7 e 0 7 7 0 a de the contents of the memory addressed are transferred. memory the memory address specified with the register pair de chapter 3 cpu architecture user?s manual u17336ej5v0ud 84 3.4.7 based addressing [function] 8-bit immediate data is added as offset data to the content s of the base register, that is , the hl register pair in the register bank specifie d by the register bank select flag (rbs0 and rbs1), and the sum is used to address the memory. addition is performed by expanding the offs et data as a positive number to 16 bits. a carry from the 16th bit is ignored. [operand format] identifier description ? [hl + byte] [description example] mov a, [hl + 10h]; when setting byte to 10h operation code 10101110 00010000 [illustration] 16 0 8 h 7 l 0 7 7 0 a hl the contents of the memory addressed are transferred. memory +10h chapter 3 cpu architecture user?s manual u17336ej5v0ud 85 3.4.8 based indexed addressing [function] the b or c register contents specified in an instruction word are added to the contents of the base register, that is, the hl register pair in the register bank specified by the register bank select flag (rbs0 and rbs1), and the sum is used to address the memory. addition is perform ed by expanding the b or c register contents as a positive number to 16 bits. a carry from the 16th bit is ignored. [operand format] identifier description ? [hl + b], [hl + c] [description example] mov a, [hl +b]; when selecting b register operation code 1 0 1 0 1 0 1 1 [illustration] 16 0 h 7 8 l 0 7 b + 0 7 7 0 a hl the contents of the memory addressed are transferred. memory chapter 3 cpu architecture user?s manual u17336ej5v0ud 86 3.4.9 stack addressing [function] the stack area is indirectly addressed with the stack pointer (sp) contents. this addressing method is automatically employed when the push, pop, subroutine call, and return instructions are executed or the register is sa ved/reset upon generation of an interrupt request. with stack addressing, only the internal high-speed ram area can be accessed. [description example] push de; when saving de register operation code 10110101 [illustration] e fee0h sp sp fee0h fedfh fedeh d memory 0 7 fedeh user?s manual u17336ej5v0ud 87 chapter 4 port functions 4.1 port functions there are two types of pin i/o buffer power supplies: av ref and v dd . the relationship between these power supplies and the pins is shown below. table 4-1. pin i/o buffer power supplies power supply corresponding pins av ref p20 to p27 v dd pins other than p20 to p27 78k0/kc2 products are provi ded with the ports shown in figure 4-1, whic h enable variety of control operations. the functions of each port are shown in table 4-2. in addition to the func tion as digital i/o ports, these ports have several alternate f unctions. for details of the alternate functions, see chapter 2 pin functions . figure 4-1. port types port 0 p00 p01 p60 p63 p70 p75 note 2 p120 p140 note 2 p130 note 2 p124 port 6 port 7 port 12 port 14 port 13 port 2 p20 p27 note 1 port 3 p30 p33 port 1 p10 p17 port 4 p40 note 1 p41 note 1 p74 note 2 p73 note 1 p72 note 1 p71 p26 note 1 notes 1. 44-pin and 48-pin products only 2. 48-pin products only chapter 4 port functions user?s manual u17336ej5v0ud 88 table 4-2. port functions (1/2) function name i/o function after reset alternate function p00 ti000 p01 i/o port 0. 2-bit i/o port. input/output can be specified in 1-bit units. use of an on-chip pull-up resistor can be specified by a software setting. input port ti010/to00 p10 sck10/txd0 p11 si10/rxd0 p12 so10 p13 txd6 p14 rxd6 p15 toh0 p16 toh1/intp5 p17 i/o port 1. 8-bit i/o port. input/output can be specified in 1-bit units. use of an on-chip pull-up resistor can be specified by a software setting. input port ti50/to50 p20 to p25 ani0 to ani5 p26 note 1 and p27 note 1 i/o port 2. 8-bit i/o port. input/output can be specified in 1-bit units. analog input ani6 note 1 and ani7 note 1 p30 intp1 p31 intp2/ocd1a note 2 p32 intp3/ocd1b note 2 p33 i/o port 3. 4-bit i/o port. input/output can be specified in 1-bit units. use of an on-chip pull-up resistor can be specified by a software setting. input port ti51/to51/intp4 p40 note 1 and p41 note 1 i/o port 4. 2-bit i/o port. input/output can be specified in 1-bit units. use of an on-chip pull-up resistor can be specified by a software setting. input port ? p60 scl0 p61 sda0 p62 exscl0 p63 i/o port 6. 4-bit i/o port. output of p60 to p63 is n-ch open-drain output (6 v tolerance). input/output can be specified in 1-bit units. input port ? p70 and p71 kr0 and kr1 p72 note 1 and p73 note 1 kr2 note 1 and kr3 note 1 p74 note 3 and p75 note 3 i/o port 7. 6-bit i/o port. input/output can be specified in 1-bit units. use of an on-chip pull-up resistor can be specified by a software setting. input port ? p120 intp0/exlvi p121 x1/ocd0a note 2 p122 x2/exclk/ocd0b note 2 p123 xt1 p124 i/o port 12. 5-bit i/o port. input/output can be specified in 1-bit units. only for p120, use of an on-chip pull-up resistor can be specified by a software setting. input port xt2/exclks p130 note 3 output port 13. 1-bit output-only port. output port ? notes 1. 44-pin and 48-pin products only for the 38-pin products, be sure to set bits 6 and 7 of pm2 to ?1?, and bits 0 and 1 of pm4, bits 2 and 3 of pm7, bits 6 and 7 of p2, bits 0 and 1 of p4, and bits 2 and 3 of p7 to ?0?. 2. pd78f0513d and 78f0515d only 3. 48-pin products only chapter 4 port functions user?s manual u17336ej5v0ud 89 table 4-2. port functions (2/2) function name i/o function after reset alternate function p140 note i/o port 14. 1-bit i/o port. input/output can be specified in 1-bit units. use of an on-chip pull-up resistor can be specified by a software setting. input port pcl/intp6 note note 48-pin products only 4.2 port configuration ports include the following hardware. table 4-3. port configuration item configuration control registers port mode register (pm0 to pm4, pm6, pm7, pm12, pm14 note ) port register (p0 to p4, p6, p7, p12, p13 note , p14 note ) pull-up resistor option register (pu0, pu1, pu3, pu4, pu7, pu12, pu14 note ) a/d port configuration register (adpc) port ? 38-pin products total: 31 (cmos i/o: 27, cmos output: 0, n-ch open drain i/o: 4) ? 44-pin products total: 37 (cmos i/o: 33, cmos output: 0, n-ch open drain i/o: 4) ? 48-pin products total: 41 (cmos i/o: 36, cmos output: 1, n-ch open drain i/o: 4) pull-up resistor ? 38-pin products total: 17 ? 44-pin products total: 21 ? 48-pin products total: 24 note 48-pin products only chapter 4 port functions user?s manual u17336ej5v0ud 90 4.2.1 port 0 port 0 is a 2-bit i/o port with an output latch. port 0 can be set to the input mode or output mode in 1-bit units using port mode register 0 (pm0). when the p00 and p 01 pins are used as an input port, use of an on-chip pull-up resistor can be specified in 1-bit units by pull-up resistor option register 0 (pu0). this port can also be used for timer i/o. reset signal generation sets port 0 to input mode. figures 4-2 and 4-3 show block diagrams of port 0. figure 4-2. block diagram of p00 internal bus p00/ti000 wr pu rd pu0 pm0 wr port wr pm pu00 alternate function output latch (p00) pm00 v dd p-ch p0 selector p0: port register 0 pu0: pull-up resistor option register 0 pm0: port mode register 0 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 91 figure 4-3. block diagram of p01 p01/ti010/to00 wr pu rd wr port wr pm pu01 pm01 v dd p-ch pu0 pm0 p0 internal bus alternate function output latch (p01) selector alternate function p0: port register 0 pu0: pull-up resistor option register 0 pm0: port mode register 0 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 92 4.2.2 port 1 port 1 is an 8-bit i/o port with an output latch. port 1 can be set to the input mode or output mode in 1-bit units using port mode register 1 (pm1). when the p10 to p17 pi ns are used as an input port, use of an on-chip pull-up resistor can be specified in 1-bit units by pull-up resistor option register 1 (pu1). this port can also be used for external interrupt requ est input, serial interfac e data i/o, clock i/o, and timer i/o. reset signal generation sets port 1 to input mode. figures 4-4 to 4-8 show block diagrams of port 1. caution to use p10/sck10/txd0 and p12/so10 as general-purpose ports, set serial operation mode register 10 (csim10) and serial clock selection regi ster 10 (csic10) to the default status (00h). figure 4-4. block diagram of p10 p10/sck10/txd0 wr pu rd wr port wr pm pu10 alternate function output latch (p10) pm10 alternate function v dd p-ch selector internal bus pu1 pm1 p1 p1: port register 1 pu1: pull-up resistor option register 1 pm1: port mode register 1 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 93 figure 4-5. block diagram of p11 and p14 p11/si10/rxd0, p14/rxd6 wr pu rd wr port wr pm pu11, pu14 alternate function output latch (p11, p14) pm11, pm14 v dd p-ch selector internal bus pu1 pm1 p1 p1: port register 1 pu1: pull-up resistor option register 1 pm1: port mode register 1 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 94 figure 4-6. block diagram of p12 and p15 p12/so10 p15/toh0 wr pu rd wr port wr pm pu12, pu15 output latch (p12, p15) pm12, pm15 alternate function v dd p-ch selector internal bus pu1 pm1 p1 p1: port register 1 pu1: pull-up resistor option register 1 pm1: port mode register 1 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 95 figure 4-7. block diagram of p13 p13/txd6 wr pu rd wr port wr pm pu13 output latch (p13) pm13 alternate function v dd p-ch internal bus selector pu1 pm1 p1 p1: port register 1 pu1: pull-up resistor option register 1 pm1: port mode register 1 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 96 figure 4-8. block diagram of p16 and p17 p16/toh1/intp5, p17/ti50/to50 wr pu rd wr port wr pm pu16, pu17 alternate function output latch (p16, p17) pm16, pm17 alternate function v dd p-ch selector internal bus pu1 pm1 p1 p1: port register 1 pu1: pull-up resistor option register 1 pm1: port mode register 1 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 97 4.2.3 port 2 port 2 is an 8-bit i/o port with an output latch. port 2 can be set to the input mode or output mode in 1-bit units using port mode register 2 (pm2). this port can also be used for a/d converter analog input. to use p20/ani0 to p27/ani7 note as digital input pins, set them in the digital i/o mode by using the a/d port configuration register (adpc) and in the input mode by using pm2. use t hese pins starting from the lower bit. to use p20/ani0 to p27/ani7 note as digital output pins, set them in t he digital i/o mode by using adpc and in the output mode by using pm2. table 4-4. setting functions of p20/ani0 to p27/ani7 note pins adpc pm2 ads p20/ani0 to p27/ani7 note pins input mode ? digital input digital i/o selection output mode ? digital output selects ani. analog input (to be converted) input mode does not select ani. analog input (not to be converted) selects ani. analog input selection output mode does not select ani. setting prohibited all p20/ani0 to p27/ani7 note are set in the analog input mode when the reset signal is generated. figure 4-9 shows a block diagram of port 2. note 38-pin products: p20/ani0 to p25/ani5 44-pin and 48-pin products: p20/ani0 to p27/ani7 cautions 1. make the av ref pin the same potential as the v dd pin when port 2 is used as a digital port. 2. for the 38-pin products, be sure to set bits 6 and 7 of pm2 to ?1?, and bits 6 and 7 of p2 to ?0?. chapter 4 port functions user?s manual u17336ej5v0ud 98 figure 4-9. block diagram of p20 to p27 internal bus p20/ani0 to p27/ani7 note rd wr port wr pm output latch (p20 to p27) pm20 to pm27 selector pm2 a/d converter p2 note 38-pin products: p20/ani0 to p25/ani5 44-pin and 48-pin products: p20/ani0 to p27/ani7 p2: port register 2 pm2: port mode register 2 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 99 4.2.4 port 3 port 3 is a 4-bit i/o port with an output latch. port 3 can be set to the input mode or output mode in 1-bit units using port mode register 3 (pm3). when the p30 to p33 pi ns are used as an input port, use of an on-chip pull-up resistor can be specified in 1-bit units by pull-up resistor option register 3 (pu3). this port can also be used for external interrupt request input and timer i/o. reset signal generation sets port 3 to input mode. figures 4-10 and 4-11 show block diagrams of port 3. cautions 1. in the products with an on-chip debug function ( pd78f0513d and 78f0515d), be sure to pull the p31/intp2/ocd1a note pin down before a reset re lease, to prevent malfunction. 2. for products without an on -chip debug function, with the flash memory of 48 kb or more ( pd78f0514 and 78f0515), and having a product ra nk of ?i?, ?k?, or ?e?, and for the products with an on-chip debug function ( pd78f0513d and 78f0515d), connect p31/intp2/ocd1a note as follows when writing the fl ash memory with a flash memory programmer. ? p31/intp2/ocd1a note : connect to v ss via a resistor (10 k : recommended). the above connection is not necessary when writing the flash memory by means of self programming. note ocd1a is provided to the pd78f0513d and 78f0515d only. remarks 1. for the product ranks, consult an ne c electronics sales representative. 2. only for the pd78f0513d and 78f0515d, p31 and p32 can be used as on-chip debug mode setting pins (ocd1a, ocd1b) when the on-chip de bug function is used. for how to connect an in- circuit emulator supporting on-chip debugging (qb-78k0mini or qb-mini2), see chapter 26 on-chip debug function ( pd78f0513d and 78f0515d only). chapter 4 port functions user?s manual u17336ej5v0ud 100 figure 4-10. block di agram of p30 to p32 p30/intp1, p31/intp2/ocd1a note , p32/intp3/ocd1b note wr pu rd wr port wr pm pu30 to pu32 alternate function output latch (p30 to p32) pm30 to pm32 v dd p-ch selector internal bus pu3 pm3 p3 note pd78f0513d and 78f0515d only p3: port register 3 pu3: pull-up resistor option register 3 pm3: port mode register 3 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 101 figure 4-11. blo ck diagram of p33 p33/intp4/ti51/to51 wr pu rd wr port wr pm pu33 alternate function output latch (p33) pm33 alternate function v dd p-ch selector internal bus pu3 pm3 p3 p3: port register 3 pu3: pull-up resistor option register 3 pm3: port mode register 3 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 102 4.2.5 port 4 (44-pin and 48-pin products only) port 4 is a 2-bit i/o port with an output latch. port 4 can be set to the input mode or output mode in 1-bit units using port mode register 4 (pm4). when the p40 and p 41 pins are used as an input port, use of an on-chip pull-up resistor can be specified in 1-bit units by pull-up resistor option register 4 (pu4). reset signal generation sets port 4 to input mode. figure 4-12 shows a block diagram of port 4. caution for the 38-pin products, be sure to set bits 0 and 1 of pm4 and p4 to ?0?. figure 4-12. block diagra m of p40, p41 (44-pin and 48-pin products only) rd p40, p41 p-ch wr pu wr port wr pm pu40, pu41 pm40, pm41 v dd pu4 pm4 p4 internal bus output latch (p40, p41) selector p4: port register 4 pu4: pull-up resistor option register 4 pm4: port mode register 4 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 103 4.2.6 port 6 port 6 is a 4-bit i/o port with an output latch. port 6 can be set to the input mode or output mode in 1-bit units using port mode register 6 (pm6). the output of the p60 to p63 pins is n- ch open-drain output (6 v tolerance). this port can also be used for serial interf ace data i/o, clock i/o, and external clock input. reset signal generation sets port 6 to input mode. figures 4-13 to 4-15 show block diagrams of port 6. remark when using p62/exscl0 as an external clock input pin of the serial interface, input a clock of 6.4 mhz to it. figure 4-13. block diagram of p60 and p61 p60/scl0, p61/sda0 rd wr port wr pm alternate function output latch (p60, p61) pm60, pm61 alternate function internal bus selector pm6 p6 p6: port register 6 pm6: port mode register 6 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 104 figure 4-14. block diagram of p62 p62/exscl0 rd wr port wr pm alternate function output latch (p62) pm62 internal bus selector pm6 p6 p6: port register 6 pm6: port mode register 6 rd: read signal wr : write signal figure 4-15. block diagram of p63 p63 rd wr port wr pm output latch (p63) pm63 internal bus selector pm6 p6 p6: port register 6 pm6: port mode register 6 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 105 4.2.7 port 7 port 7 is a 6-bit i/o port with an output latch. port 7 can be set to the input mode or output mode in 1-bit units using port mode register 7 (pm7). when the p70 to p75 note pins are used as an input port, use of an on-chip pull-up resistor can be specified in 1-bit units by pull-up resistor option register 7 (pu7). p70 to p73 can also be used for key return input. reset signal generation sets port 7 to input mode. figure 4-16 shows a block diagram of port 7. note 38-pin products: p70/kr0, p71/kr1 44-pin products: p70/kr0 to p73/kr3 48-pin products: p70/kr0 to p73/kr3, p74, p75 caution for the 38-pin products, be sure to set bits 2 and 3 of pm7 and p7 to ?0?. figure 4-16. block di agram of p70 to p75 p70/kr0 to p73/kr3 note 1 , p74 note 1 , p75 note 1 wr pu rd wr port wr pm pu70 to pu75 note 2 alternate function note 3 output latch (p70 to p75 notes 2, 4 ) pm70 to pm75 notes 2, 4 v dd p-ch selector internal bus pu7 pm7 notes 1. 38-pin products: p70/kr0, p71/kr1 44-pin products: p70/kr0 to p73/kr3 48-pin products: p70/kr0 to p73/kr3, p74, p75 2. p74, p75, pm74, pm75, pu74, and pu75 ar e available only in the 48-pin products. 3. the alternate function is available only in the p70 to p73 pins. p7: port register 7 pu7: pull-up resistor option register 7 pm7: port mode register 7 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 106 4.2.8 port 12 port 12 is a 5-bit i/o port with an output latch. port 12 can be set to the input mode or output mode in 1-bit units using port mode register 12 (pm12). when used as an input por t only for p120, use of an on-chip pull-up resistor can be specified by pull-up resistor option register 12 (pu12). this port can also be used as pins for external interru pt request input, potential input for external low-voltage detection, connecting resonator for main system clock, connecti ng resonator for subsystem clock, external clock input for main system clock, and external clock input for subsystem clock. reset signal generation sets port 12 to input mode. figures 4-17 and 4-18 show block diagrams of port 12. cautions 1. when using the p121 to p124 pins to co nnect a resonator for the ma in system clock (x1, x2) or subsystem clock (xt1, xt2), or to input an external clock for the main system clock (exclk) or subsystem clock (exclks), the x1 oscillation mode, xt1 oscillation mode, or external clock input mode must be set by us ing the clock operation mode select register (oscctl) (for details, see 5.3 (1 ) clock operation mode select register (oscctl) and (3) setting of operation mode for subsystem clock pin) . the reset value of oscctl is 00h (all of the p121 to p124 pins are i/o port pins). at this time, setting of the pm121 to pm124 and p121 to p124 pins is not necessary. 2. for products without an on -chip debug function, with the flash memory of 48 kb or more ( pd78f0514 and 78f0515), and having a product rank of ?i?, ?k ?, or ?e?, and for the product with an on-chip debug function ( pd78f0513d and 78f0515d), connect p121/x1/ocd0a note as follows when writing the flash memo ry with a flash memory programmer. ? p121/x1/ocd0a note : when using this pin as a port, connect it to v ss via a resistor (10 k : recommended) (in the input mode) or leave it open (in the output mode). the above connection is not necessary when writing the flash memory by means of self programming. note ocd0a is provided to the pd78f0513d and 78f0515d only. remarks 1. for the product ranks, consult an ne c electronics sales representative. 2. the x1 and x2 pins of the pd78f0513d and 78f0515d can be used as on-chip debug mode setting pins (ocd0a, ocd0b) when the on-chip de bug function is used. for how to connect an in- circuit emulator supporting on-chip debu gging (qb-78k0mini or qb-mini2), see chapter 26 on- chip debug function ( pd78f0513d and 78f0515d only). chapter 4 port functions user?s manual u17336ej5v0ud 107 figure 4-17. blo ck diagram of p120 p120/intp0/exlvi wr pu rd wr port wr pm pu120 alternate function output latch (p120) pm120 v dd p-ch pu12 pm12 p12 selector internal bus p12: port register 12 pu12: pull-up resistor option register 12 pm12: port mode register 12 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 108 figure 4-18. block di agram of p121 to p124 p122/x2/exclk/ocd0b note , p124/xt2/exclks rd wr port wr pm output latch (p122/p124) pm122/pm124 pm12 p12 rd wr port wr pm output latch (p121/p123) pm121/pm123 pm12 p12 exclk, oscsel/ exclks, oscsels oscctl oscsel/ oscsels oscctl p121/x1/ocd0a note , p123/xt1 oscsel/ oscsels oscctl oscsel/ oscsels oscctl internal bus selector selector note pd78f0513d and 78f0515d only p12: port register 12 pu12: pull-up resistor option register 12 pm12: port mode register 12 oscctl: clock operation mode select register rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 109 4.2.9 port 13 (48-pin products only) port 13 is a 1-bit output-only port. figure 4-19 shows a block diagram of port 13. figure 4-19. block diagram of p130 (48-pin products only) rd output latch (p130) wr port p130 internal bus p13 p13: port register 13 rd: read signal wr : write signal remark when reset is effected, p130 outputs a low level. if p130 is set to output a high level before reset is effected, the output signal of p130 ca n be dummy-output as the cpu reset signal. p130 set by software reset signal chapter 4 port functions user?s manual u17336ej5v0ud 110 4.2.10 port 14 (48-pin products only) port 14 is a 1-bit i/o port with an output latch. port 14 can be set to the input mode or output mode in 1-bit units using port mode register 14 (pm14). when the p140 pin is used as an input port, use of an on-chip pull-up resistor can be specified in 1-bit units by pull-up resistor option register 14 (pu14). this port can also be used for external interrupt request input and clock output. reset signal generation sets port 14 to input mode. figures 4-20 shows a block diagram of port 14. figure 4-20. block diagram of p140 (48-pin products only) p140/pcl/intp6 wr pu rd wr port wr pm pu140 alternate function output latch (p140) pm140 alternate function v dd p-ch selector internal bus pu14 pm14 p14 p14: port register 14 pu14: pull-up resistor option register 14 pm14: port mode register 14 rd: read signal wr : write signal chapter 4 port functions user?s manual u17336ej5v0ud 111 4.3 registers controlling port function port functions are controlled by the following four types of registers. ? port mode registers (pm0 to pm4, pm6, pm7, pm12, pm14 note ) ? port registers (p0 to p4, p6, p7, p12, p13 note , p14 note ) ? pull-up resistor option registers (p u0, pu1, pu3, pu4, pu7, pu12, pu14 note ) ? a/d port configuration register (adpc) note 48-pin products only (1) port mode registers (pm0 to pm4, pm6, pm7, pm12, and pm14 note ) these registers specify input or output mode for the port in 1-bit units. these registers can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets these registers to ffh. when port pins are used as alternate-function pi ns, set the port mode register by referencing 4.5 settings of port mode register and output latch when using alternate function . note 48-pin products only chapter 4 port functions user?s manual u17336ej5v0ud 112 figure 4-21. format of port mode register 7 1 symbol pm0 6 1 5 1 4 1 3 1 2 1 1 pm01 0 pm00 address ff20h after reset ffh r/w r/w pm17 pm1 pm16 pm15 pm14 pm13 pm12 pm11 pm10 ff21h ffh r/w pm27 pm2 pm26 pm25 pm24 pm23 pm22 pm21 pm20 ff22h ffh r/w 1 pm3 1 1 1 pm33 pm32 pm31 pm30 ff23h ffh r/w 1 pm4 1 1 1 1 1 pm41 pm40 ff24h ffh r/w 1 pm6 1 1 1 pm63 pm62 pm61 pm60 ff26h ffh r/w 1 pm7 1 pm75 note pm74 note pm73 pm72 pm71 pm70 ff27h ffh r/w 1 pm12 1 1 pm124 pm123 pm122 pm121 pm120 ff2ch ffh r/w 1 pm14 note 1 1 1 1 1 1 pm140 ff2eh ffh r/w pmmn pmn pin i/o mode selection (m = 0 to 4, 6, 7, 12, 14; n = 0 to 7) 0 output mode (output buffer on) 1 input mode (output buffer off) note 48-pin products only caution for the 38-pin products, be sure to set bits 2 to 7 of pm0, bits 6 and 7 of pm2, bits 4 to 7 of pm3, bits 2 to 7 of pm4, bits 4 to 7 of pm 6, bits 4 to 7 of pm7, and bits 5 to 7 of pm12 to ?1?. also, be sure to set bits 0 and 1 of pm4, and bits 2 and 3 of pm7 to ?0?. for the 44-pin products, be sure to set bits 2 to 7 of pm0, bits 4 to 7 of pm3, bits 2 to 7 of pm4, bits 4 to 7 of pm6, bits 4 to 7 of pm7, and bits 5 to 7 of pm12 to ?1?. for the 48-pin products, be sure to set bits 2 to 7 of pm0, bits 4 to 7 of pm3, bits 2 to 7 of pm4, bits 4 to 7 of pm6, bits 6 and 7 of pm7, bits 5 to 7 of pm12, and bits 1 to 7 of pm14 to ?1?. chapter 4 port functions user?s manual u17336ej5v0ud 113 (2) port registers (p0 to p4, p6, p7, p12, p13 note , and p14 note ) these registers write the data t hat is output from the chip when data is output from a port. if the data is read in the input mode, the pin level is read. if it is read in the output mode, the value of the output latch is read. these registers can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets these registers to 00h. note 48-pin products only figure 4-22. format of port register 7 0 symbol p0 6 0 5 0 4 0 3 0 2 0 1 p01 0 p00 address ff00h after reset 00h (output latch) r/w r/w p17 p1 p16 p15 p14 p13 p12 p11 p10 ff01h 00h (output latch) r/w r/w p27 p2 p26 p25 p24 p23 p22 p21 p20 ff02h 00h (output latch) 0 p3 0 0 0 p33 p32 p31 p30 ff03h 00h (output latch) r/w 0 p4 0 0 0 0 0 p41 p40 ff04h 00h (output latch) r/w 0 p6 0 0 0 p63 p62 p61 p60 ff06h 00h (output latch) r/w 0 p7 0 p75 note 1 p74 note 1 p73 p72 p71 p70 ff07h 00h (output latch) r/w 0 p12 0 0 p124 note 2 p123 note 2 p122 note 2 p121 note 2 p120 ff0ch 00h (output latch) r/w 0 p13 note 1 0 0 0 0 0 0 p130 note 1 ff0dh 00h (output latch) r/w 0 p14 note 1 0 0 0 0 0 0 p140 note 1 ff0eh 00h (output latch) r/w m = 0 to 4, 6, 7, 12 to 14; n = 0 to 7 pmn output data control (in output mode) input data read (in input mode) 0 output 0 input low level 1 output 1 input high level notes 1. 48-pin products only 2. ?0? is always read from the output latch of p121 to p124 if the pin is in the external clock input mode. caution for the 38-pin products, be su re to set bits 6 and 7 of p2, bits 0 and 1 of p4, and bits 2 and 3 of p7 to ?0?. chapter 4 port functions user?s manual u17336ej5v0ud 114 (3) pull-up resistor option registers (pu0 , pu1, pu3, pu4, pu7, pu12, and pu14 note ) these registers specify whether the on-ch ip pull-up resistors of p00, p01, p10 to p17, p30 to p33, p40, p41, p70 to p73, p74 note , p75 note , p120, and p140 note are to be used or not. on-chip pull-up resistors can be used in 1-bit units only for the bits set to input mode of the pins to which the use of an on-chip pull-up resistor has been specified in pu0, pu1, pu3, pu4, pu7, pu12, and pu14 note . on-chip pull-up resistors cannot be connected to bits set to output mode and bits used as alternate-functi on output pins, regardless of the settings of pu0, pu1, pu3, pu4, pu7, pu12, and pu14 note . these registers can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets these registers to 00h. note 48-pin products only figure 4-23. format of pull-up resistor option register 7 0 symbol pu0 6 0 5 0 4 0 3 0 2 0 1 pu01 0 pu00 address ff30h after reset 00h r/w r/w pu17 pu1 pu16 pu15 pu14 pu13 pu12 pu11 pu10 ff31h 00h r/w 0 pu3 0 0 0 pu33 pu32 pu31 pu30 ff33h 00h r/w 0 pu4 0 0 0 0 0 pu41 pu40 ff34h 00h r/w 0 pu7 0 pu75 note pu74 note pu73 pu72 pu71 pu70 ff37h 00h r/w 0 pu12 0 0 0 0 0 0 pu120 ff3ch 00h r/w 0 pu14 note 0 0 0 0 0 0 pu140 ff3eh 00h r/w pumn pmn pin on-chip pull-up resistor selection (m = 0, 1, 3, 4, 7, 12, 14; n = 0 to 7) 0 on-chip pull-up resistor not connected 1 on-chip pull-up resistor connected note 48-pin products only chapter 4 port functions user?s manual u17336ej5v0ud 115 (4) a/d port configuration register (adpc) this register switches the p20/ani0 to p27/ani7 note pins to digital i/o of port or analog input of a/d converter. adpc can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to 00h. note 38-pin products: p20/ani0 to p25/ani5 pins 44-pin and 48-pin products: p20/ani0 to p27/ani7 pins figure 4-24. format of a/d port configuration register (adpc) adpc0 adpc1 adpc2 adpc3 0 0 0 0 digital i/o (d)/analog input (a) switching setting prohibited adpc3 0 1 2 3 4 5 6 7 adpc address: ff2fh after reset: 00h r/w symbol p27/ ani7 a a a a a a a a d p26/ ani6 a a a a a a a d d p25/ ani5 a a a a a a d d d p24/ ani4 a a a a a d d d d p23/ ani3 a a a a d d d d d p22/ ani2 a a a d d d d d d p21/ ani1 a a d d d d d d d p20/ ani0 a d d d d d d d d 0 0 0 0 0 0 0 0 1 adpc2 0 0 0 0 1 1 1 1 0 adpc1 0 0 1 1 0 0 1 1 0 adpc0 0 1 0 1 0 1 0 1 0 other than above cautions 1. set the channel used for a/d conversion to the input mode by using port mode register 2 (pm2). 2. if data is written to adpc, a wait cycle is ge nerated. do not write data to adpc when the cpu is operating on the subsystem clock and the pe ripheral hardware clock is stopped. for details, see chapter 34 cautions for wait. 3. for the 38-pin products, setting adpc3, adpc2, adpc1, adpc0 to 0, 1, 1, 1 or 1, 0, 0, 0 is prohibited. chapter 4 port functions user?s manual u17336ej5v0ud 116 4.4 port function operations port operations differ depending on whether the inpu t or output mode is set, as shown below. 4.4.1 writing to i/o port (1) output mode a value is written to the output latch by a transfer instruct ion, and the output latch content s are output from the pin. once data is written to the output latch, it is reta ined until data is written to the output latch again. the data of the output latch is clear ed when a reset signal is generated. (2) input mode a value is written to the output latch by a transfer instruction, but since the output buffer is off, the pin status does not change. once data is written to the output latch, it is reta ined until data is written to the output latch again. the data of the output latch is clear ed when a reset signal is generated. 4.4.2 reading from i/o port (1) output mode the output latch contents ar e read by a transfer instruction. t he output latch content s do not change. (2) input mode the pin status is read by a transfer instruct ion. the output latch c ontents do not change. 4.4.3 operations on i/o port (1) output mode an operation is performed on the output latch contents, and the result is wr itten to the output latch. the output latch contents are output from the pins. once data is written to the output latch, it is reta ined until data is written to the output latch again. the data of the output latch is clear ed when a reset signal is generated. (2) input mode the pin level is read and an operation is performed on its cont ents. the result of the op eration is written to the output latch, but since the output buffer is off, the pin status does not change. the data of the output latch is clear ed when a reset signal is generated. chapter 4 port functions user?s manual u17336ej5v0ud 117 4.5 settings of port mode register and output latch when using alternate function to use the alternate function of a por t pin, set the port mode register and output latch as shown in table 4-5. table 4-5. settings of port mode register and output latch when using alternate function alternate function pin name function name i/o pm p p00 ti000 input 1 ti010 input 1 p01 to00 output 0 0 input 1 sck10 output 0 1 p10 txd0 output 0 1 si10 input 1 p11 rxd0 input 1 p12 so10 output 0 0 p13 txd6 output 0 1 p14 rxd6 input 1 p15 toh0 output 0 0 toh1 output 0 0 p16 intp5 input 1 ti50 input 1 p17 to50 output 0 0 p20 to p27 notes 1, 2 ani0 to ani7 notes 1, 2 input 1 p30 to p32 intp1 to intp3 input 1 intp4 input 1 ti51 input 1 p33 to51 output 0 0 p60 scl0 i/o 0 0 p61 sda0 i/o 0 0 p62 exscl0 input 1 p70 to p73 note 1 kr0 to kr3 note 1 input 1 intp0 input 1 p120 exlvi input 1 p121 x1 note 3 ? x2 note 3 ? p122 exclk note 3 input p123 xt1 note 3 ? xt2 note 3 ? p124 exclks note 3 input pcl output 0 0 p140 note 4 intp6 input 1 chapter 4 port functions user?s manual u17336ej5v0ud 118 notes 1. 38-pin products: p20/ani0 to p25/ani5, p70/kr0, p71/kr1 44-pin and 48-pin products: p20/ani0 to p27/ani7, p70/kr0 to p73/kr3 2. the function of the ani0/p20 to ani7/p27 pins ca n be selected by using t he a/d port configuration register (adpc), the analog input channel specification register (ads), and pm2. table 4-6. setting functions of ani0/p20 to ani7/p27 pins adpc pm2 ads ani0/p20 to ani7/p27 pins selects ani. analog input (to be converted) input mode does not select ani. analog input (not to be converted) selects ani. analog input selection output mode does not select ani. setting prohibited input mode ? digital input digital i/o selection output mode ? digital output 3. when using the p121 to p124 pins to connect a resonator for the main system clock (x1, x2) or subsystem clock (xt1, xt2), or to input an exte rnal clock for the main system clock (exclk) or subsystem clock (exclks), the x1 oscillation mode , xt1 oscillation mode, or external clock input mode must be set by using the clock operation mode select register (oscctl) (for details, see 5.3 (1) clock operation mode select register (oscctl) and (3) setting of operation mode for subsystem clock pin ). the reset value of os cctl is 00h (all of the p121 to p124 are i/o port pins). at this time, setting of pm121 to pm124 and p121 to p124 is not necessary. 4. 48-pin products only remarks 1. : don?t care pm : port mode register p : port output latch 2. the x1, x2, p31, and p32 pins of the pd78f0513d and 78f0515d can be used as on-chip debug mode setting pins (ocd0a, ocd0b, ocd1a, ocd1b) when the on-chip debug function is used. for how to connect an in-circuit emulator supporti ng on-chip debugging (qb-78k0mini or qb-mini2), see chapter 26 on-chip debug function ( pd78f0513d and 78f0515d only). chapter 4 port functions user?s manual u17336ej5v0ud 119 4.6 cautions on 1-bit manipulation in struction for port register n (pn) when a 1-bit manipulation instruction is executed on a por t that provides both input and output functions, the output latch value of an input port that is not subject to manipulation may be written in addition to the targeted bit. therefore, it is recommended to rewr ite the output latch when switching a port from input mode to output mode. user?s manual u17336ej5v0ud 120 chapter 5 clock generator 5.1 functions of clock generator the clock generator generates the clock to be supplied to the cpu and peripheral hardware. the following three kinds of system clo cks and clock oscillators are selectable. (1) main system clock <1> x1 oscillator this circuit oscillates a clock of f x = 1 to 20 mhz by connecting a resonator to x1 and x2. oscillation can be stopped by executing the stop inst ruction or using the main osc control register (moc). <2> internal high-speed oscillator this circuit oscillates a clock of f rh = 8 mhz (typ.). after a reset release, the cpu always starts operating with this internal high-speed oscillation clock. oscillation can be stopped by executing the stop instruction or using the internal oscillation mode register (rcm). an external main system clock (f exclk = 1 to 20 mhz) can also be supplied from the exclk/x2/p122 pin. an external main system clock input can be disabled by executing the stop in struction or using rcm. as the main system clock, a high-spee d system clock (x1 clock or external ma in system clock) or internal high- speed oscillation clock can be selected by using the main clock mode register (mcm). (2) subsystem clock ? subsystem clock oscillator this circuit oscillates at a frequency of f xt = 32.768 khz by connecting a 32.768 khz resonator across xt1 and xt2. oscillation can be stopped by using the pr ocessor clock control register (pcc) and clock operation mode select register (oscctl). an external subsystem clock (f exclks = 32.768 khz) can also be supplied from the exclks/xt2/p124 pin. an external subsystem clock input can be disabled by setting pcc and oscctl. remarks 1. f x : x1 clock oscillation frequency 2. f rh : internal high-speed oscillation clock frequency 3. f exclk : external main system clock frequency 4. f xt : xt1 clock oscillation frequency 5. f exclks : external subsystem clock frequency chapter 5 clock generator user?s manual u17336ej5v0ud 121 (3) internal low-speed oscillation clock (clock for watchdog timer) ? internal low-speed oscillator this circuit oscillates a clock of f rl = 240 khz (typ.). after a reset releas e, the internal low-speed oscillation clock always starts operating. oscillation can be stopped by using the internal oscill ation mode register (rcm) when ?internal low-speed oscillator can be stopped by software? is set by option byte. the internal low-speed oscillation clock cannot be us ed as the cpu clock. the following hardware operates with the internal low-speed oscillation clock. ? watchdog timer ? tmh1 (when f rl , f rl /2 7 , or f rl /2 9 is selected) remark f rl : internal low-speed oscillation clock frequency 5.2 configuration of clock generator the clock generator includes the following hardware. table 5-1. configuration of clock generator item configuration control registers clock operation mode select register (oscctl) processor clock control register (pcc) internal oscillation mode register (rcm) main osc control register (moc) main clock mode register (mcm) oscillation stabilization time counter status register (ostc) oscillation stabilization time select register (osts) oscillators x1 oscillator xt1 oscillator internal high-speed oscillator internal low-speed oscillator chapter 5 clock generator user?s manual u17336ej5v0ud 122 figure 5-1. block diag ram of clock generator option byte 1: cannot be stopped 0: can be stopped internal oscillation mode register (rcm) lsrstop rsts rstop internal high- speed oscillator (8 mhz (typ.)) internal low- speed oscillator (240 khz (typ.)) f rl clock operation mode select register (oscctl) oscsels exclks xt1/p123 xt2/exclks/ p124 f sub peripheral hardware clock (f prs ) watchdog timer, 8-bit timer h1 watch timer, clock output 1/2 cpu clock (f cpu ) processor clock control register (pcc) css pcc2 cls pcc1 pcc0 prescaler main system clock switch f xp peripheral hardware clock switch x1 oscillation stabilization time counter osts1 osts0 osts2 oscillation stabilization time select register (osts) 3 most 16 most 15 most 14 most 13 most 11 oscillation stabilization time counter status register (ostc) controller mcm0 xsel mcs mstop exclk oscsel amph clock operation mode select register (oscctl) 4 f xp 2 f xp 2 2 f xp 2 3 f xp 2 4 main clock mode register (mcm) main clock mode register (mcm) main osc control register (moc) f rh internal bus internal bus high-speed system clock oscillator crystal/ceramic oscillation external input clock x1/p121 x2/exclk/ p122 f xh f sub 2 crystal oscillation external input clock subsystem clock oscillator f x f exclk f xt f exclks xtstart to subsystem clock oscillator xtstart processor clock control register (pcc) selector stop chapter 5 clock generator user?s manual u17336ej5v0ud 123 remarks 1. f x : x1 clock oscillation frequency 2. f rh : internal high-speed oscillation clock frequency 3. f exclk : external main system clock frequency 4. f xh : high-speed system clock frequency 5. f xp : main system clock frequency 6. f prs : peripheral hardware clock frequency 7. f cpu : cpu clock frequency 8. f xt : xt1 clock oscillation frequency 9. f exclks : external subsystem clock frequency 10. f sub : subsystem clock frequency 11. f rl : internal low-speed oscillation clock frequency 5.3 registers controlling clock generator the following seven registers are used to control the clock generator. ? clock operation mode sele ct register (oscctl) ? processor clock control register (pcc) ? internal oscillation mode register (rcm) ? main osc control register (moc) ? main clock mode register (mcm) ? oscillation stabilization time c ounter status register (ostc) ? oscillation stabilization time select register (osts) (1) clock operation mode select register (oscctl) this register selects the operation mo des of the high-speed system and s ubsystem clocks, and the gain of the on-chip oscillator. oscctl can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation clears this register to 00h. chapter 5 clock generator user?s manual u17336ej5v0ud 124 figure 5-2. format of clock operati on mode select register (oscctl) address: ff9fh after reset: 00h r/w symbol <7> <6> <5> <4> 3 2 1 <0> oscctl exclk oscsel exclks note oscsels note 0 0 0 amph exclk oscsel high-speed system clock pin operation mode p121/x1 pin p122/x2/exclk pin 0 0 i/o port mode i/o port 0 1 x1 oscillation mode crystal/ceramic resonator connection 1 0 i/o port mode i/o port 1 1 external clock input mode i/o port external clock input amph operating frequency control 0 1 mhz f xh 10 mhz 1 10 mhz < f xh 20 mhz note exclks and oscsels are used in combinatio n with xtstart (bit 6 of the processor clock control register (pcc)). see (3) setting of operation mode for subsystem clock pin . cautions 1. be sure to set amph to 1 if the high-speed system cl ock oscillation frequency exceeds 10 mhz. 2. set amph before setting the peripheral functions after a reset release. the value of amph can be changed only once after a reset release. wh en the high-speed system clock (x1 oscillation) is selected as the cpu clock, supply of the cpu clock is stopped for 4.06 to 16.12 s after amph is set to 1. when the high- speed system clock (externa l clock input) is selected as the cpu clock, supply of the cpu clock is stopped for the duratio n of 160 external clocks after amph is set to 1. 3. if the stop instruction is executed wh en amph = 1, supply of the cpu clock is stopped for 4.06 to 16.12 s after the stop mode is re leased when the internal high-speed oscillation clock is selected as the cp u clock, or for the duration of 160 external clocks when th e high-speed system clock (external clock input) is selected as the cpu clo ck. when the high -speed system clock (x1 oscillation) is selected as the cpu cl ock, the oscillation stabilizatio n time is counted after the stop mode is released. 4. to change the value of exclk and oscsel, be sure to confirm that bit 7 (mstop) of the main osc control register (moc) is 1 (the x1 oscillator stops or the external clock from the exclk pin is disabled). remark f xh : high-speed system clock frequency chapter 5 clock generator user?s manual u17336ej5v0ud 125 (2) processor clock control register (pcc) this register is used to select t he cpu clock, the division ratio, and operation mode for subsystem clock. pcc is set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets pcc to 01h. figure 5-3. format of processor clock control register (pcc) address: fffbh after reset: 01h r/w note 1 symbol 7 6 <5> <4> 3 2 1 0 pcc 0 xtstart note2 cls css 0 pcc2 pcc1 pcc0 cls cpu clock status 0 main system clock 1 subsystem clock notes 1. bit 5 is read-only. 2. xtstart is used in combination with exc lks and oscsels (bits 5 and 4 of the clock operation mode select register (oscctl)). see (3) setting of operation mode for subsystem clock pin . caution be sure to clear bits 3 and 7 to ?0?. remarks 1. f xp : main system clock oscillation frequency 2. f sub : subsystem clock oscillation frequency the fastest instruction can be executed in 2 clocks of the cpu clock in the 78k0/kc2. theref ore, the relationship between the cpu clock (f cpu ) and the minimum instruction execution time is as shown in table 5-2. css pcc2 pcc1 pcc0 cpu clock (f cpu ) selection 0 0 0 f xp 0 0 1 f xp /2 (default) 0 1 0 f xp /2 2 0 1 1 f xp /2 3 0 1 0 0 f xp /2 4 0 0 0 0 0 1 0 1 0 0 1 1 1 1 0 0 f sub /2 other than above setting prohibited chapter 5 clock generator user?s manual u17336ej5v0ud 126 table 5-2. relationship between cpu clo ck and minimum instruction execution time minimum instruction execution time: 2/f cpu main system clock high-speed system clock note internal high-speed oscillation clock note subsystem clock cpu clock (f cpu ) at 10 mhz operation at 20 mhz operation at 8 mhz (typ.) operation at 32.768 khz operation f xp 0.2 s 0.1 s 0.25 s (typ.) ? f xp /2 0.4 s 0.2 s 0.5 s (typ.) ? f xp /2 2 0.8 s 0.4 s 1.0 s (typ.) ? f xp /2 3 1.6 s 0.8 s 2.0 s (typ.) ? f xp /2 4 3.2 s 1.6 s 4.0 s (typ.) ? f sub /2 ? ? 122.1 s note the main clock mode register (mcm) is used to set the main system clock supplied to cpu clock (high- speed system clock/internal high- speed oscillation clock) (see figure 5-6 ). (3) setting of operation mode for subsystem clock pin the operation mode for the subsystem clock pin can be se t by using bit 6 (xtstart) of the processor clock control register (pcc) and bits 5 and 4 (exclks, osc sels) of the clock operation mode select register (oscctl) in combination. table 5-3. setting of operati on mode for subsystem clock pin pcc oscctl bit 6 bit 5 bit 4 xtstart exclks oscsels subsystem clock pin operation mode p123/xt1 pin p124/xt2/exclks pin 0 0 0 i/o port mode i/o port 0 0 1 xt1 oscillation mode crystal resonator connection 0 1 0 i/o port mode i/o port 0 1 1 external clock input mode i/o port external clock input 1 xt1 oscillation mode crystal resonator connection caution confirm that bit 5 (cls) of the processor clock cont rol register (pcc) is 0 (cpu is operating with main system clock) when changing the current valu es of xtstart, exclks, and oscsels. remark : don?t care chapter 5 clock generator user?s manual u17336ej5v0ud 127 (4) internal oscillati on mode register (rcm) this register sets the operation mode of internal oscillator. rcm can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to 80h note 1 . figure 5-4. format of internal oscillation mode register (rcm) address: ffa0h after reset: 80h note 1 r/w note 2 symbol <7> 6 5 4 3 2 <1> <0> rcm rsts 0 0 0 0 0 lsrstop rstop rsts status of internal high-speed oscillator 0 waiting for accuracy stabilizati on of internal high-speed oscillator 1 stability operating of internal high-speed oscillator lsrstop internal low-speed oscillator oscillating/stopped 0 internal low-speed oscillator oscillating 1 internal low-s peed oscillator stopped rstop internal high-speed oscillator oscillating/stopped 0 internal high-spe ed oscillator oscillating 1 internal high-speed oscillator stopped notes 1. the value of this register is 00h immedi ately after a reset release but automatically changes to 80h after internal high-speed oscillator has been stabilized. 2. bit 7 is read-only. caution when setting rstop to 1, be sure to confirm that the cpu operates with a clock other than the internal high -speed oscillation clock. sp ecifically, set under either of the following conditions. ? when mcs = 1 (when cpu operates with the high-speed system clock) ? when cls = 1 (when cpu opera tes with the subsystem clock) in addition, stop peripheral hardware that is operating on the internal high-speed oscillation clock before setting rstop to 1. chapter 5 clock generator user?s manual u17336ej5v0ud 128 (5) main osc control register (moc) this register selects the operati on mode of the high-speed system clock. this register is used to stop the x1 oscillator or to disable an external clock input from the exclk pin when the cpu operates with a clock other than the high-speed system clock. moc can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to 80h. figure 5-5. format of main osc control register (moc) address: ffa2h after reset: 80h r/w symbol <7> 6 5 4 3 2 1 0 moc mstop 0 0 0 0 0 0 0 control of high-speed system clock operation mstop x1 oscillation mode external clock input mode 0 x1 oscillator operating external clock from exclk pin is enabled 1 x1 oscillator stopped external clock from exclk pin is disabled cautions 1. when setting ms top to 1, be sure to confirm that the cpu operates with a clock other than the high-speed system clock. specifically , set under either of the following conditions. ? when mcs = 0 (when cpu operates with the internal high-speed oscillation clock) ? when cls = 1 (when cpu opera tes with the subsystem clock) in addition, stop peripheral hardware th at is operating on the high-speed system clock before setting mstop to 1. 2. do not clear mstop to 0 while bit 6 (oscsel) of the clock operation mode select register (oscctl) is 0 (i/o port mode). 3. the peripheral hardware cannot operate when the pe ripheral hardware clock is stopped. to resume the operation of the peripheral hardware after the peripheral hardware clock has been stopped, in itialize the peri pheral hardware. chapter 5 clock generator user?s manual u17336ej5v0ud 129 (6) main clock mode register (mcm) this register selects the main system clock supplied to cpu clock and clock supplied to peripheral hardware clock. mcm can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation clears this register to 00h. figure 5-6. format of main clock mode register (mcm) address: ffa1h after reset: 00h r/w note symbol 7 6 5 4 3 <2> <1> <0> mcm 0 0 0 0 0 xsel mcs mcm0 selection of clock supplied to main system clock and peripheral hardware xsel mcm0 main system clock (f xp ) peripheral hardware clock (f prs ) 0 0 0 1 internal high-speed oscillation clock (f rh ) 1 0 internal high-speed oscillation clock (f rh ) 1 1 high-speed system clock (f xh ) high-speed system clock (f xh ) mcs main system clock status 0 operates with internal high-speed oscillation clock 1 operates with hi gh-speed system clock note bit 1 is read-only. cautions 1. xsel can be change d only once after a reset release. 2. a clock other than f prs is supplied to the following peripheral functions regardless of the se tting of xsel and mcm0. ? watchdog timer (operates with intern al low-speed oscillation clock) ? when ?f rl ?, ?f rl /2 7 ?, or ?f rl /2 9 ? is selected as the count clock for 8-bit timer h1 (operates with internal low-speed oscillation clock) ? peripheral hardware selects the ext ernal clock as the clock source (except when the external count clock of tm00 is selected (ti000 pin valid edge)) chapter 5 clock generator user?s manual u17336ej5v0ud 130 (7) oscillation stabilization time c ounter status register (ostc) this is the register that indicates t he count status of the x1 clock oscillati on stabilization time counter. when x1 clock oscillation starts with the intern al high-speed oscillation clock or su bsystem clock used as the cpu clock, the x1 clock oscillation stabilization time can be checked. ostc can be read by a 1-bit or 8-bit memory manipulation instruction. when reset is released (reset by reset input, poc, lv i, and wdt), the stop instruction and mstop (bit 7 of moc register) = 1 clear ostc to 00h. figure 5-7. format of oscillation stabilizati on time counter status register (ostc) address: ffa3h after reset: 00h r symbol 7 6 5 4 3 2 1 0 ostc 0 0 0 most11 most 13 most14 most15 most16 most11 most13 most14 most15 most16 oscillation stabilization time status f x = 10 mhz f x = 20 mhz 1 0 0 0 0 2 11 /f x min. 204.8 s min. 102.4 s min. 1 1 0 0 0 2 13 /f x min. 819.2 s min. 409.6 s min. 1 1 1 0 0 2 14 /f x min. 1.64 ms min. 819.2 s min. 1 1 1 1 0 2 15 /f x min. 3.27 ms min. 1.64 ms min. 1 1 1 1 1 2 16 /f x min. 6.55 ms min. 3.27 ms min. cautions 1. after the above time has elapsed, th e bits are set to 1 in order from most11 and remain 1. 2. the oscillation stabilization time counter counts up to the oscillation stabilization time set by osts. if the st op mode is entered and then released while the internal high-speed oscillation clock is being used as the cpu clock, set the oscillation stabilization time as follows. ? desired ostc oscillation stabilization time oscillation stabilization time set by osts note, therefore, that only the status up to the oscillation stabilization time set by osts is set to ostc afte r stop mode is released. 3. the x1 clock oscillation stabilization wa it time does not include the time until clock oscillation starts (?a? below). stop mode release x1 pin voltage waveform a remark f x : x1 clock oscillation frequency chapter 5 clock generator user?s manual u17336ej5v0ud 131 (8) oscillation stabilization time select register (osts) this register is used to select the x1 clock oscillation stabilization wait time when the stop mode is released. when the x1 clock is selected as the cpu clock, the operation waits for the time set using osts after the stop mode is released. when the internal high-speed oscillation clock is selected as the cpu clock, confirm with ostc that the desired oscillation stabilization time has elapsed after the stop mode is released. the oscillation stabilization time can be checked up to the time set using ostc. osts can be set by an 8-bit memory manipulation instruction. reset signal generation sets osts to 05h. figure 5-8. format of oscillation stabiliz ation time select register (osts) address: ffa4h after reset: 05h r/w symbol 7 6 5 4 3 2 1 0 osts 0 0 0 0 0 osts2 osts1 osts0 osts2 osts1 osts0 oscillation stabilization time selection f x = 10 mhz f x = 20 mhz 0 0 1 2 11 /f x 204.8 s 102.4 s 0 1 0 2 13 /f x 819.2 s 409.6 s 0 1 1 2 14 /f x 1.64 ms 819.2 s 1 0 0 2 15 /f x 3.27 ms 1.64 ms 1 0 1 2 16 /f x 6.55 ms 3.27 ms other than above setting prohibited cautions 1. to set the stop mode when the x1 clock is used as the cpu clock, set osts before executing the stop instruction. 2. do not change the value of the osts register during the x1 clock oscillation stabilization time. 3. the oscillation stabilization time counter counts up to the oscillation stabilization time set by osts. if the st op mode is entered and then released while the internal high-speed oscillation clock is being used as the cpu clock, set the oscillation stabilization time as follows. ? desired ostc oscillation stabilization time oscillation stabilization time set by osts note, therefore, that only the status up to the oscillation stabilization time set by osts is set to ostc afte r stop mode is released. 4. the x1 clock oscillation stabilization wa it time does not include the time until clock oscillation starts (?a? below). stop mode release x1 pin voltage waveform a remark f x : x1 clock oscillation frequency chapter 5 clock generator user?s manual u17336ej5v0ud 132 5.4 system clock oscillator 5.4.1 x1 oscillator the x1 oscillator oscillates with a cryst al resonator or ceramic resonator (1 to 20 mhz) connected to the x1 and x2 pins. an external clock can also be input. in this case, input the clock signal to the exclk pin. figure 5-9 shows an example of the exte rnal circuit of the x1 oscillator. figure 5-9. example of extern al circuit of x1 oscillator (a) crystal or ceramic osc illation (b) external clock v ss x1 x2 crystal resonator or ceramic resonator exclk external clock cautions are listed on the next page. 5.4.2 xt1 oscillator the xt1 oscillator oscillates with a crystal resonator (standard: 32.768 khz) connected to the xt1 and xt2 pins. an external clock can also be input. in this case, input the clock signal to the exclks pin. figure 5-10 shows an example of the exte rnal circuit of the xt1 oscillator. figure 5-10. example of extern al circuit of xt1 oscillator (a) crystal oscillation (b) external clock xt2 v ss xt1 32.768 khz exclks external clock cautions are listed on the next page. chapter 5 clock generator user?s manual u17336ej5v0ud 133 caution 1. when using the x1 oscillator and xt1 osc illator, wire as follows in the area enclosed by the broken lines in the figures 5-9 and 5-10 to avoid an adverse e ffect from wiring capacitance. ? keep the wiring length as short as possible. ? do not cross the wiring with the other signal li nes. do not route the wiring near a signal line through which a high fluctuating current flows. ? always make the ground point of the os cillator capacitor the same potential as v ss . do not ground the capacitor to a ground patter n through which a high current flows. ? do not fetch signals from the oscillator. note that the xt1 oscillator is designed as a low-amplitude circuit for reducing power consumption. figure 5-11 shows examples of incorrect resonator connection. figure 5-11. examples of incorr ect resonator connection (1/2) (a) too long wiring (b) crossed signal line x2 v ss x1 x1 v ss x2 port remark when using the subsystem clock, replace x1 and x2 with xt1 and xt2, respectively. also, insert resistors in series on the xt2 side. chapter 5 clock generator user?s manual u17336ej5v0ud 134 figure 5-11. examples of incorr ect resonator connection (2/2) (c) wiring near high alternating current (d) current flowing through ground line of oscillator (potential at points a, b, and c fluctuates) v ss x1 x2 v ss x1 x2 ab c pmn v dd high current high current (e) signals are fetched v ss x1 x2 remark when using the subsystem clock, replace x1 and x2 with xt1 and xt2, respectively. also, insert resistors in series on the xt2 side. caution 2. when x2 and xt1 are wired in paralle l, the crosstalk noise of x2 may increase with xt1, resulting in malfunctioning. chapter 5 clock generator user?s manual u17336ej5v0ud 135 5.4.3 when subsystem clock is not used if it is not necessary to use the subsystem clock for low power consumption operat ions, or if not using the subsystem clock as an i/o port, set the xt1 and xt2 pins to i/o mode (oscsels = 0) and connect them as follows. input (pm123/pm124 = 1): i ndependently connect to v dd or v ss via a resistor. output (pm123/pm124 = 0): leave open. remark oscsels: bit 4 of clock operati on mode select register (oscctl) pm123, pm124: bits 3 and 4 of port mode register 12 (pm12) 5.4.4 internal hi gh-speed oscillator the internal high-speed oscillator is incorporated in the 78k0/kc2. oscillation can be controlled by the internal oscillation mode register (rcm). after a reset release, the internal high-speed oscilla tor automatically starts oscillation (8 mhz (typ.)). 5.4.5 internal low-speed oscillator the internal low-speed oscillator is incorporated in the 78k0/kc2. the internal low-speed oscillation clock is only used as the watchdog timer and the clock of 8-bit timer h1. the internal low-speed oscillation clock cannot be used as the cpu clock. ?can be stopped by software? or ?cannot be stopped? ca n be selected by the option byte. when ?can be stopped by software? is set, oscillation can be controlled by the internal oscillation mode register (rcm). after a reset release, the internal low-speed oscillator automatically starts oscillati on, and the watchdog timer is driven (240 khz (typ.)) if the watchdog timer operation is enabled using the option byte. 5.4.6 prescaler the prescaler generates various clocks by dividing the main system clock when the ma in system clock is selected as the clock to be supplied to the cpu. chapter 5 clock generator user?s manual u17336ej5v0ud 136 5.5 clock generator operation the clock generator generates the following clocks and contro ls the operation modes of the cpu, such as standby mode (see figure 5-1 ). ? main system clock f xp ? high-speed system clock f xh x1 clock f x external main system clock f exclk ? internal high-speed oscillation clock f rh ? subsystem clock f sub ? xt1 clock f xt ? external subsystem clock f exclks ? internal low-speed oscillation clock f rl ? cpu clock f cpu ? peripheral hardware clock f prs the cpu starts operation when the internal high-speed osc illator starts outputting after a reset release in the 78k0/kc2, thus enabling the following. (1) enhancement of security function when the x1 clock is set as the cpu clock by the defaul t setting, the device cannot operate if the x1 clock is damaged or badly connected and therefore does not operate after reset is released. however, the start clock of the cpu is the internal high-speed oscillation clock, so the device can be started by the internal high-speed oscillation clock after a reset release. consequently , the system can be safely shut down by performing a minimum operation, such as acknowledging a reset source by software or performing safety processing when there is a malfunction. (2) improvement of performance because the cpu can be started with out waiting for the x1 clock oscillation stabilization time, the total performance can be improved. when the power supply voltage is turned on, the cl ock generator operation is shown in figure 5-12. chapter 5 clock generator user?s manual u17336ej5v0ud 137 figure 5-12. clock generator operation wh en power supply voltage is turned on (when 1.59 v poc mode is set (option byte: pocmode = 0)) internal high-speed oscillation clock (f rh ) cpu clock high-speed system clock (f xh ) (when x1 oscillation selected) internal high-speed oscillation clock high-speed system clock switched by software subsystem clock (f sub ) (when xt1 oscillation selected) subsystem clock x1 clock oscillation stabilization time: 2 11 /f x to 2 16 /f x note 4 starting x1 oscillation is set by software. starting xt1 oscillation is set by software. reset processing (11 to 45 s) <3> waiting for voltage stabilization internal reset signal 0 v 1.59 v (typ.) 1.8 v notes 1, 2 0.5 v/ms (min.) notes 1, 2 power supply voltage (v dd ) <1> <2> <4> <5> <5> <4> note 3 (1.93 to 5.39 ms) <1> when the power is turned on, an internal reset signal is generated by the power-on-clear (poc) circuit. <2> when the power supply voltage exceeds 1.59 v (typ.), the reset is released and the internal high-speed oscillator automatically starts oscillation. <3> when the power supply voltage rises with a slope of 0.5 v/ms (min.), the cp u starts operation on the internal high-speed oscillation clock after the reset is released and after the stabilization times for the voltage of the power supply and regulator have elapsed, and then reset processing is performed. <4> set the start of oscillation of the x1 or xt1 clock via software (see (1) in 5.6.1 example of controlling high- speed system clock and (1) in 5.6.3 example of cont rolling subsystem clock) . <5> when switching the cpu clock to the x1 or xt1 clock, wait for the clock oscillation to stabilize, and then set switching via software (see (3) in 5.6.1 example of controlli ng high-speed system clock and (3) in 5.6.3 example of controlling subsystem clock ). notes 1. with standard and (a) grade products, if the voltage rises with a slope of le ss than 0.5 v/ms (min.) from power application until the volt age reaches 1.8 v, input a low le vel to the reset pin from power application until the voltage reaches 1.8 v, or set the 2.7 v/1.59 v poc mode by using the option byte (pocmode = 1) (see figure 5-13 ). when a low level has been input to the reset pin until the voltage reaches 1.8 v, the cpu oper ates with the same timing as <2> and thereafter in figure 5-12, after the reset has been released by the reset pin. 2. with (a2) grade products, if the voltage rises with a slope of less than 0.75 v/ms (min.) from power application until the voltage reaches 2.7 v, input a low level to t he reset pin from power application until the voltage reaches 2.7 v. when a low level has been input to the reset pin until the voltage reaches 2.7 v, the cpu operates with the same timi ng as <2> and thereafter in figure 5-12, after the reset has been releas ed by the reset pin. chapter 5 clock generator user?s manual u17336ej5v0ud 138 notes 3. the internal voltage stabilization time includes the o scillation accuracy stabilization time of the internal high-speed oscillation clock. 4. when releasing a reset (above figure) or releas ing stop mode while the cpu is operating on the internal high-speed oscillation clock, confirm the osci llation stabilization time for the x1 clock using the oscillation stabilization time count er status register (ostc). if the cpu operates on the high-speed system clock (x1 oscillation), set the oscillation st abilization time when releasing stop mode using the oscillation stabilization time select register (osts). caution it is not necessary to wait for the oscillation stabilization time when an externa l clock input from the exclk and exclks pins is used. remark while the microcontroller is operating, a clock t hat is not used as the cpu clock can be stopped via software settings. the internal high-speed o scillation clock and high-speed system clock can be stopped by executing the stop instruction (see (4) in 5.6.1 example of co ntrolling high-speed system clock , (3) in 5.6.2 example of controlling inte rnal high-speed oscillation clock , and (4) in 5.6.3 example of controlling subsystem clock ). figure 5-13. clock generator operation wh en power supply voltage is turned on (when 2.7 v/1.59 v poc mode is set (option byte: pocmode = 1)) internal high-speed oscillation clock (f rh ) cpu clock high-speed system clock (f xh ) (when x1 oscillation selected) internal high-speed oscillation clock high-speed system clock switched by software subsystem clock (f sub ) (when xt1 oscillation selected) subsystem clock x1 clock oscillation stabilization time: 2 11 /f x to 2 16 /f x note starting x1 oscillation is set by software. starting xt1 oscillation is set by software. waiting for oscillation accuracy stabilization (86 to 361 s) internal reset signal 0 v 2.7 v (typ.) power supply voltage (v dd ) <1> <3> <2> <4> <5> reset processing (11 to 45 s) <4> <5> <1> when the power is turned on, an internal reset signal is generated by the power-on-clear (poc) circuit. <2> when the power supply voltage exceeds 2.7 v (typ.), the reset is released and the internal high-speed oscillator automatically starts oscillation. <3> after the reset is released and reset processing is performed, the cpu starts operation on the internal high- speed oscillation clock. <4> set the start of oscillation of the x1 or xt1 clock via software (see (1) in 5.6.1 example of controlling high- speed system clock and (1) in 5.6.3 example of cont rolling subsystem clock) . chapter 5 clock generator user?s manual u17336ej5v0ud 139 <5> when switching the cpu clock to the x1 or xt1 clock, wait for the clock oscillation to stabilize, and then set switching via software (see (3) in 5.6.1 example of controlli ng high-speed system clock and (3) in 5.6.3 example of controlling subsystem clock ). note when releasing a reset (above figure) or releasing stop mode while the cpu is operating on the internal high-speed oscillation clock, confirm the oscillation stab ilization time for the x1 clock using the oscillation stabilization time counter status r egister (ostc). if the cpu operates on the high-speed system clock (x1 oscillation), set the oscillation stabilization time when releasing stop mode using the oscillation stabilization time select register (osts). cautions 1. a voltage oscillation stabilization time of 1.93 to 5.39 ms is require d after the supply voltage reaches 1.59 v (typ.). if the s upply voltage rises from 1.59 v (t yp.) to 2.7 v (typ.) within 1.93 ms, the power supply oscillation stabilization ti me of 0 to 5.39 ms is automatically generated before reset processing. 2. it is not necessary to wait for the oscillation stabilization ti me when an external clock input from the exclk and exc lks pins is used. remark while the microcontroller is operating, a clock t hat is not used as the cpu clock can be stopped via software settings. the internal high-speed o scillation clock and high-speed system clock can be stopped by executing the stop instruction (see (4) in 5.6.1 example of co ntrolling high-speed system clock , (3) in 5.6.2 example of controlling inte rnal high-speed oscillation clock , and (4) in 5.6.3 example of controlling subsystem clock ). chapter 5 clock generator user?s manual u17336ej5v0ud 140 5.6 controlling clock 5.6.1 controlling hi gh-speed system clock the following two types of high-s peed system clocks are available. ? x1 clock: crystal/ceramic resonator is connected across the x1 and x2 pins. ? external main system clock: exter nal clock is input to the exclk pin. when the high-speed system clock is not used, the x1/p 121 and x2/exclk/p122 pins can be used as i/o port pins. caution the x1/p121 and x2/exclk/p122 pins are in the i/o port mode after a reset release. the following describes examples of setti ng procedures for the following cases. (1) when oscillating x1 clock (2) when using external main system clock (3) when using high-speed system clock as cpu clock and peripheral hardware clock (4) when stopping high-speed system clock (1) example of setting procedure when oscillating the x1 clock <1> setting frequency (oscctl register) using amph, set the gain of the on-chip osci llator according to the frequency to be used. amph note operating frequency control 0 1 mhz f xh 10 mhz 1 10 mhz < f xh 20 mhz note set amph before setting the peripheral functions a fter a reset release. the value of amph can be changed only once after a reset release. when amph is set to 1, the clock supply to the cpu is stopped for 4.06 to 16.12 s. remark f xh : high-speed system clock frequency <2> setting p121/x1 and p122/x2/exclk pins and selecti ng x1 clock or external clock (oscctl register) when exclk is cleared to 0 and oscsel is set to 1, the mode is switched from port mode to x1 oscillation mode. exclk oscsel operation mode of high- speed system clock pin p121/x1 pin p122/x2/exclk pin 0 1 x1 oscillation mode crystal/ceramic resonator connection <3> controlling oscillation of x1 clock (moc register) if mstop is cleared to 0, the x1 oscillator starts oscillating. <4> waiting for the stabilization of the oscillation of x1 clock check the ostc register and wait for the necessary time. during the wait time, other software processing c an be executed with the internal high-speed oscillation clock. chapter 5 clock generator user?s manual u17336ej5v0ud 141 cautions 1. do not change the value of exclk and oscsel while the x1 clock is operating. 2. set the x1 clock after th e supply voltage has r eached the operable volt age of the clock to be used (see chapter 28 electrical specifications (standard products) to chapter 31 electrical specificat ions ((a2) grade products: t a = ? 40 to +125 c)). (2) example of setting procedure when using the external main system clock <1> setting frequency (oscctl register) using amph, set the frequency to be used. amph note operating frequency control 0 1 mhz f xh 10 mhz 1 10 mhz < f xh 20 mhz note set amph before setting the peripheral functions a fter a reset release. the value of amph can be changed only once after a reset release. the clock supply to the cpu is stopped for the duration of 160 external clocks after amph is set to 1. remark f xh : high-speed system clock frequency <2> setting p121/x1 and p122/x2/exclk pins and selecting operation mode (oscctl register) when exclk and oscsel are set to 1, the mode is switched from port mode to external clock input mode. exclk oscsel operation mode of high- speed system clock pin p121/x1 pin p122/x2/exclk pin 1 1 external clock input mode i/o port external clock input <3> controlling external main system clock input (moc register) when mstop is cleared to 0, the input of the external main system clock is enabled. cautions 1. do not change the value of exclk a nd oscsel while the external main system clock is operating. 2. set the external main system clock afte r the supply voltage h as reached the operable voltage of the clock to be used (see chapter 28 electrical specifications (standard products) to chapter 31 elec trical specifications ((a2) grade products: t a = ? 40 to +125 c)). (3) example of setting procedure when using high-speed system clo ck as cpu clock and peripheral hardware clock <1> setting high-speed system clock oscillation note (see 5.6.1 (1) example of setting proce dure when oscillating the x1 clock and (2) example of setting procedure when using th e external main system clock. ) note the setting of <1> is not necessary when hi gh-speed system clock is already operating. chapter 5 clock generator user?s manual u17336ej5v0ud 142 <2> setting the high-speed system clock as the main system clock (mcm register) when xsel and mcm0 are set to 1, the high-speed syst em clock is supplied as the main system clock and peripheral hardware clock. selection of main system clock and clock supplied to peripheral hardware xsel mcm0 main system clock (f xp ) peripheral hardware clock (f prs ) 1 1 high-speed system clock (f xh ) high-speed system clock (f xh ) caution if the high-speed system clock is selected as the main syst em clock, a clock other than the high-speed system clock cannot be set as the peripheral hardware clock. <3> setting the main system clock as the cpu clo ck and selecting the division ratio (pcc register) when css is cleared to 0, the main system clock is supplied to the cpu. to select the cpu clock division ratio, use pcc0, pcc1, and pcc2. css pcc2 pcc1 pcc0 cpu clock (f cpu ) selection 0 0 0 f xp 0 0 1 f xp /2 (default) 0 1 0 f xp /2 2 0 1 1 f xp /2 3 1 0 0 f xp /2 4 0 other than above setting prohibited (4) example of setting procedure when stopping the high-speed system clock the high-speed system clock can be st opped in the foll owing two ways. ? executing the stop instruction and stopping the x1 oscillation (disabling clock input if the external clock is used) ? setting mstop to 1 and stopping the x1 oscillation (dis abling clock input if the external clock is used) (a) to execute a stop instruction <1> setting to stop peripheral hardware stop peripheral hardware that c annot be used in the stop mode (f or peripheral hardware that cannot be used in stop mode, see chapter 20 standby function ). <2> setting the x1 clock oscillation st abilization time after standby release when the cpu is operating on the x1 clock, set t he value of the osts r egister before the stop instruction is executed. <3> executing the stop instruction when the stop instruction is ex ecuted, the system is placed in the stop mode and x1 oscillation is stopped (the input of the ex ternal clock is disabled). chapter 5 clock generator user?s manual u17336ej5v0ud 143 (b) to stop x1 oscillation (disabling exter nal clock input) by setting mstop to 1 <1> confirming the cpu clock st atus (pcc and mcm registers) confirm with cls and mcs that the cpu is oper ating on a clock other than the high-speed system clock. when cls = 0 and mcs = 1, the high-speed system cl ock is supplied to the cpu, so change the cpu clock to the subsystem clock or internal high-speed oscillation clock. cls mcs cpu clock status 0 0 internal high-speed oscillation clock 0 1 high-speed system clock 1 subsystem clock <2> stopping the high-speed system clock (moc register) when mstop is set to 1, x1 oscillation is stopp ed (the input of the external clock is disabled). caution be sure to confirm that mcs = 0 or cls = 1 when setting mstop to 1. in addition, stop peripheral hardware that is operating on the high-speed system clock. 5.6.2 example of controlling inte rnal high-speed oscillation clock the following describes examples of clock setting procedures for the following cases. (1) when restarting oscillation of the internal high-speed oscillation clock (2) when using internal high-speed oscillation clock as cpu clock, and internal high-speed oscillation clock or high-speed system clock as peripheral hardware clock (3) when stopping the internal high-speed oscillation clock (1) example of setting procedure wh en restarting oscillation of the in ternal high-speed oscillation clock note 1 <1> setting restart of oscillation of the intern al high-speed oscillation clock (rcm register) when rstop is cleared to 0, the internal high-speed oscillation clock starts operating. <2> waiting for the oscillation accuracy stabilization time of internal high-speed oscillation clock (rcm register) wait until rsts is set to 1 note 2 . notes 1. after a reset release, the internal high-speed oscillator automatically starts oscillating and the internal high-speed oscillation clock is selected as the cpu clock. 2. this wait time is not necessary if high accura cy is not necessary for the cpu clock and peripheral hardware clock. (2) example of setting procedure when using intern al high-speed oscillation clock as cpu clock, and internal high-speed oscillation clock or high-speed system clo ck as peripheral hardware clock <1> ? restarting oscillation of the internal high-speed oscillation clock note (see 5.6.2 (1) example of setting procedure when restarting internal high-speed oscillation clock ). ? oscillating the high-speed system clock note (this setting is required when using the high-speed system clock as the peripheral hardware clock. see 5.6.1 (1) example of setting proced ure when oscillating the x1 clock and (2) example of setting procedure when using th e external main system clock. ) chapter 5 clock generator user?s manual u17336ej5v0ud 144 note the setting of <1> is not necessary when the internal high-speed oscillation clock or high- speed system clock is already operating. <2> selecting the clock s upplied as the main system clock and peri pheral hardware clock (mcm register) set the main system clock and peripheral hardware clock using xsel and mcm0. selection of main system clock and clock supplied to peripheral hardware xsel mcm0 main system clock (f xp ) peripheral hardware clock (f prs ) 0 0 0 1 internal high-speed oscillation clock (f rh ) 1 0 internal high-speed oscillation clock (f rh ) high-speed system clock (f xh ) <3> selecting the cpu clock division ratio (pcc register) when css is cleared to 0, the main system clock is supplied to the cpu. to select the cpu clock division ratio, use pcc0, pcc1, and pcc2. css pcc2 pcc1 pcc0 cpu clock (f cpu ) selection 0 0 0 f xp 0 0 1 f xp /2 (default) 0 1 0 f xp /2 2 0 1 1 f xp /2 3 1 0 0 f xp /2 4 0 other than above setting prohibited (3) example of setting procedure when stoppi ng the internal high-speed oscillation clock the internal high-speed oscillation clock can be stopped in the following two ways. ? executing the stop instruction to set the stop mode ? setting rstop to 1 and stopping the internal high-speed oscillation clock (a) to execute a stop instruction <1> setting of peripheral hardware stop peripheral hardware that c annot be used in the stop mode (f or peripheral hardware that cannot be used in stop mode, see chapter 20 standby function ). <2> setting the x1 clock oscillation st abilization time after standby release when the cpu is operating on the x1 clock, set t he value of the osts r egister before the stop instruction is executed. <3> executing the stop instruction when the stop instruction is ex ecuted, the system is placed in the stop mode and internal high- speed oscillation clock is stopped. chapter 5 clock generator user?s manual u17336ej5v0ud 145 (b) to stop internal high-speed o scillation clock by setting rstop to 1 <1> confirming the cpu clock st atus (pcc and mcm registers) confirm with cls and mcs that the cpu is operat ing on a clock other than the internal high-speed oscillation clock. when cls = 0 and mcs = 0, the internal high-speed oscillation clock is supplied to the cpu, so change the cpu clock to the high-spe ed system clock or subsystem clock. cls mcs cpu clock status 0 0 internal high-speed oscillation clock 0 1 high-speed system clock 1 subsystem clock <2> stopping the internal high-speed oscillation clock (rcm register) when rstop is set to 1, internal high-speed oscillation clock is stopped. caution be sure to confirm that mcs = 1 or cls = 1 when setting rstop to 1. in addition, stop peripheral hardware that is operating on the internal high-speed oscillation clock. 5.6.3 example of cont rolling subsystem clock the following two types of sub system clocks are available. ? xt1 clock: crystal/ceramic resonator is connected across the xt1 and xt2 pins. ? external subsystem clock: external clock is input to the exclks pin. when the subsystem clock is not us ed, the xt1/p123 and xt2/ exclks/p124 pins can be used as i/o port pins. caution the xt1/p123 and xt2/exclks/p124 pins are in the i/o port mode after a reset release. the following describes examples of setti ng procedures for the following cases. (1) when oscillating xt1 clock (2) when using external subsystem clock (3) when using subsystem clock as cpu clock (4) when stopping subsystem clock (1) example of setting procedur e when oscillating the xt1 clock <1> setting xt1 and xt2 pins and selectin g operation mode (pcc and oscctl registers) when xtstart, exclks, and oscsels are set as any of the following, the mode is switched from port mode to xt1 oscillation mode. xtstart exclks oscsels operation mode of subsystem clock pin p123/xt1 pin p124/xt2/ exclks pin 0 0 1 1 xt1 oscillation mode crystal/ceramic resonator connection remark : don?t care <2> waiting for the stabilization of the subsystem clock oscillation wait for the oscillation stabilization time of the subsystem clock by software, using a timer function. caution do not change the value of xtstart, exclks, and oscsel s while the subsystem clock is operating. chapter 5 clock generator user?s manual u17336ej5v0ud 146 (2) example of setting procedure when using the external subsystem clock <1> setting xt1 and xt2 pins, selecting xt1 clock/ external clock and controlling oscillation (pcc and oscctl registers) when xtstart is cleared to 0 and exclks and oscsel s are set to 1, the mode is switched from port mode to external clock input mode. in this ca se, input the external clock to the exclks/xt2/p124 pins. xtstart exclks oscsels operation mode of subsystem clock pin p123/xt1 pin p124/xt2/ exclks pin 0 1 1 external clock input mode i/o port external clock input caution do not change the value of xtstart, exclks, and oscsel s while the subsystem clock is operating. (3) example of setting procedure when us ing the subsystem cl ock as the cpu clock <1> setting subsystem clock oscillation note (see 5.6.3 (1) example of setting proce dure when oscillating the xt1 clock and (2) example of setting procedure when using the external subsystem clock .) note the setting of <1> is not necessary when while the subsystem clock is operating. <2> switching the cpu clock (pcc register) when css is set to 1, the subsystem clock is supplied to the cpu. css pcc2 pcc1 pcc0 cpu clock (f cpu ) selection 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 f sub /2 1 other than above setting prohibited (4) example of setting procedure wh en stopping the subsystem clock <1> confirming the cpu clock st atus (pcc and mcm registers) confirm with cls and mcs that the cpu is operat ing on a clock other than the subsystem clock. when cls = 1, the subsystem clock is supplied to t he cpu, so change the cpu clock to the internal high-speed oscillation clock or high-speed system clock. cls mcs cpu clock status 0 0 internal high-speed oscillation clock 0 1 high-speed system clock 1 subsystem clock <2> stopping the subsystem clock (oscctl register) when oscsels is cleared to 0, xt1 oscillation is stop ped (the input of the external clock is disabled). cautions 1. be sure to confirm th at cls = 0 when clearing oscsels to 0. in addition, stop the watch timer if it is operating on the subsystem clock. 2. the subsystem clock oscillation cannot be stopped using the stop instruction. chapter 5 clock generator user?s manual u17336ej5v0ud 147 5.6.4 example of controlling in ternal low-speed oscillation clock the internal low-speed oscillation clock cannot be used as the cpu clock. only the following peripheral hardware can operate with this clock. ? watchdog timer ? 8-bit timer h1 (if f rl is selected as the count clock) in addition, the following operation modes can be selected by the option byte. ? internal low-speed oscillator cannot be stopped ? internal low-speed oscillator can be stopped by software the internal low-speed oscillator autom atically starts oscillation after a reset release, and the watchdog timer is driven (240 khz (typ.)) if the watchdog timer operation has been enabled by the option byte. (1) example of setting procedure when stoppi ng the internal low-speed oscillation clock <1> setting lsrstop to 1 (rcm register) when lsrstop is set to 1, the internal low-speed oscillation clock is stopped. (2) example of setting procedure when restarting osc illation of the internal low-speed oscillation clock <1> clearing lsrstop to 0 (rcm register) when lsrstop is cleared to 0, the internal low-speed oscillation clock is restarted. caution if ?internal low-speed oscillator cannot be st opped? is selected by the option byte, oscillation of the internal low-speed oscillati on clock cannot be controlled. 5.6.5 clocks supplied to cp u and peripheral hardware the following table shows the relation among the clocks supplied to the cpu and peripheral hardware, and setting of registers. table 5-4. clocks supplied to cpu and peripheral hardware, and register setting supplied clock clock supplied to cpu clock su pplied to peripheral hardware xsel css mcm0 exclk internal high-speed oscillation clock 0 0 x1 clock 1 0 0 0 internal high-speed oscillation clock external main system clock 1 0 0 1 x1 clock 1 0 1 0 external main system clock 1 0 1 1 internal high-speed oscillation clock 0 1 1 1 0 0 x1 clock 1 1 1 0 1 1 0 1 subsystem clock external main system clock 1 1 1 1 remarks 1. xsel: bit 2 of the main clock mode register (mcm) 2. css: bit 4 of the processor clock control register (pcc) 3. mcm0: bit 0 of mcm 4. exclk: bit 7 of the clock operat ion mode select register (oscctl) 5. : don?t care chapter 5 clock generator user?s manual u17336ej5v0ud 148 5.6.6 cpu clock stat us transition diagram figure 5-14 shows the cpu clock status transition diagram of this product. figure 5-14. cpu clock stat us transition diagram (when 1.59 v poc mode is set (option byte: pocmode = 0)) power on reset release v dd 1.59 v (typ.) v dd 1.8 v (min.) note v dd < 1.59 v (typ.) internal low-speed oscillation: woken up internal high-speed oscillation: woken up x1 oscillation/exclk input: stops (i/o port mode) xt1 oscillation/exclks input: stops (i/o port mode) internal low-speed oscillation: operating internal high-speed oscillation: operating x1 oscillation/exclk input: stops (i/o port mode) xt1 oscillation/exclks input: stops (i/o port mode) cpu: operating with internal high- speed oscillation internal low-speed oscillation: operable internal high-speed oscillation: operating x1 oscillation/exclk input: selectable by cpu xt1 oscillation/exclks input: selectable by cpu cpu: internal high- speed oscillation stop internal low-speed oscillation: operable internal high-speed oscillation: stops x1 oscillation/exclk input: stops xt1 oscillation/exclks input: operable cpu: internal high- speed oscillation halt internal low-speed oscillation: operable internal high-speed oscillation: operating x1 oscillation/exclk input: operable xt1 oscillation/exclks input: operable cpu: operating with x1 oscillation or exclk input cpu: x1 oscillation/exclk input stop cpu: x1 oscillation/exclk input halt internal low-speed oscillation: operable internal high-speed oscillation: selectable by cpu x1 oscillation/exclk input: operating xt1 oscillation/exclks input: selectable by cpu internal low-speed oscillation: operable internal high-speed oscillation: stops x1 oscillation/exclk input: stops xt1 oscillation: operable internal low-speed oscillation: operable internal high-speed oscillation: operable x1 oscillation/exclk input: operating xt1 oscillation/exclks input: operable cpu: operating with xt1 oscillation or exclks input cpu: xt1 oscillation/exclks input halt internal low-speed oscillation: operable internal high-speed oscillation: selectable by cpu x1 oscillation/exclk input: selectable by cpu xt1 oscillation/exclks input: operating internal low-speed oscillation: operable internal high-speed oscillation: operable x1 oscillation/exclk input: operable xt1 oscillation/exclks input: operating (b) (a) (c) (d) (e) (f) (g) (h) (i) note 1.8 v (standard and (a) grade products ), 2.7 v ((a2) grade products) remark in the 2.7 v/1.59 v poc mode ( option byte: pocmode = 1), the cpu cl ock status changes to (a) in the above figure when the supply voltage exceeds 2.7 v (typ.), and to (b) after reset processing (11 to 45 s). chapter 5 clock generator user?s manual u17336ej5v0ud 149 table 5-5 shows transition of the cpu clock and examples of setting the sfr registers. table 5-5. cpu clock transition a nd sfr register setting examples (1/4) (1) cpu operating with internal high-speed oscillation clock (b) a fter reset release (a) status transition sfr register setting (a) (b) sfr registers do not have to be se t (default status after reset release). (2) cpu operating with high-speed system clock (c) after reset release (a) (the cpu operates with the internal high-speed oscill ation clock immediately after a reset release (b).) (setting sequence of sfr registers) setting flag of sfr register status transition amph exclk oscsel mstop ostc register xsel mcm0 (a) (b) (c) (x1 clock: 1 mhz f xh 10 mhz) 0 0 1 0 must be checked 1 1 (a) (b) (c) (external main clock: 1 mhz f xh 10 mhz) 0 1 1 0 must not be checked 1 1 (a) (b) (c) (x1 clock: 10 mhz < f xh 20 mhz) 1 0 1 0 must be checked 1 1 (a) (b) (c) (external main clock: 10 mhz < f xh 20 mhz) 1 1 1 0 must not be checked 1 1 caution set the clock after the supply voltage has reached the operable voltage of the clock to be set (see chapter 28 electrical specification s (standard products) to chapter 31 electrical specifications ((a2) grade products: t a = ? 40 to +125 c)). (3) cpu operating with subsystem cl ock (d) after reset release (a) (the cpu operates with the internal high-speed oscill ation clock immediately after a reset release (b).) (setting sequence of sfr registers) setting flag of sfr register status transition xtstart exclks oscsels waiting for oscillation stabilization css 0 0 1 (a) (b) (d) (xt1 clock) 1 necessary 1 (a) (b) (d) (external subsystem clock) 0 1 1 unnecessary 1 remarks 1. (a) to (i) in table 5-5 correspond to (a) to (i) in figure 5-14. 2. exclk, oscsel, exclks, oscsels, amph: bits 7 to 4 and 0 of the clock oper ation mode select register (oscctl) mstop: bit 7 of the main osc control register (moc) xsel, mcm0: bits 2 and 0 of the main clock mode register (mcm) xtstart, css: bits 6 and 4 of the processor clock control register (pcc) : don?t care chapter 5 clock generator user?s manual u17336ej5v0ud 150 table 5-5. cpu clock transition a nd sfr register setting examples (2/4) (4) cpu clock changing from inte rnal high-speed oscillation clock (b) to high-speed system clock (c) (setting sequence of sfr registers) setting flag of sfr register status transition amph note exclk oscsel mstop ostc register xsel note mcm0 (b) (c) (x1 clock: 1 mhz f xh 10 mhz) 0 0 1 0 must be checked 1 1 (b) (c) (external main clock: 1 mhz f xh 10 mhz) 0 1 1 0 must not be checked 1 1 (b) (c) (x1 clock: 10 mhz < f xh 20 mhz) 1 0 1 0 must be checked 1 1 (b) (c) (external main clock: 10 mhz < f xh 20 mhz) 1 1 1 0 must not be checked 1 1 unnecessary if these registers are already set unnecessary if the cpu is operating with the high-speed system clock note the value of this flag can be changed only once after a re set release. this setting is not necessary if it has already been set. caution set the clock after the supply voltage has reached the operable voltage of the clock to be set (see chapter 28 electrical specification s (standard products) to chapter 31 electrical specifications ((a2) grade products: t a = ? 40 to +125 c)). (5) cpu clock changing from in ternal high-speed oscillation cl ock (b) to subsystem clock (d) (setting sequence of sfr registers) setting flag of sfr register status transition xtstart exclks oscsels waiting for oscillation stabilization css 0 0 1 (b) (d) (xt1 clock) 1 necessary 1 (b) (d) (external subsystem cl ock) 0 1 1 unnecessary 1 unnecessary if the cpu is operating with the subsystem clock remarks 1. (a) to (i) in table 5-5 correspond to (a) to (i) in figure 5-14. 2. exclk, oscsel, exclks, oscsels, amph: bits 7 to 4 and 0 of the clock oper ation mode select register (oscctl) mstop: bit 7 of the main osc control register (moc) xsel, mcm0: bits 2 and 0 of the main clock mode register (mcm) xtstart, css: bits 6 and 4 of the processor clock control register (pcc) : don?t care chapter 5 clock generator user?s manual u17336ej5v0ud 151 table 5-5. cpu clock transition a nd sfr register setting examples (3/4) (6) cpu clock changing from high- speed system clock (c) to internal high-speed oscillation clock (b) (setting sequence of sfr registers) setting flag of sfr register status transition rstop rsts mcm0 (c) (b) 0 confirm this flag is 1. 0 unnecessary if the cpu is operating with the internal high-speed oscillation clock (7) cpu clock changing from high-speed system clock (c) to subsystem clock (d) (setting sequence of sfr registers) setting flag of sfr register status transition xtstart exclks oscsels waiting for oscillation stabilization css 0 0 1 (c) (d) (xt1 clock) 1 necessary 1 (c) (d) (external subsystem clock) 0 1 1 unnecessary 1 unnecessary if the cpu is operating with the subsystem clock (8) cpu clock changing from subsystem clock (d ) to internal high-speed oscillation clock (b) (setting sequence of sfr registers) setting flag of sfr register status transition rstop rsts mcm0 css (d) (b) 0 confirm this flag is 1. 0 0 unnecessary if the cpu is operating with the internal high-speed oscillation clock unnecessary if xsel is 0 remarks 1. (a) to (i) in table 5-5 correspond to (a) to (i) in figure 5-14. 2. mcm0: bit 0 of the main clock mode register (mcm) exclks, oscsels: bits 5 and 4 of the clo ck operation mode select register (oscctl) rsts, rstop: bits 7 and 0 of the internal oscillation mode register (rcm) xtstart, css: bits 6 and 4 of the processor clock control register (pcc) : don?t care chapter 5 clock generator user?s manual u17336ej5v0ud 152 table 5-5. cpu clock transition a nd sfr register setting examples (4/4) (9) cpu clock changing from subsystem clock (d) to high-sp eed system clock (c) (setting sequence of sfr registers) setting flag of sfr register status transition amph note exclk oscsel mstop ostc register xsel note mcm0 css (d) (c) (x1 clock: 1 mhz f xh 10 mhz) 0 0 1 0 must be checked 1 1 0 (d) (c) (external main clock: 1 mhz f xh 10 mhz 0 1 1 0 must not be checked 1 1 0 (d) (c) (x1 clock: 10 mhz < f xh 20 mhz) 1 0 1 0 must be checked 1 1 0 (d) (c) (external main clock: 10 mhz < f xh 20 mhz) 1 1 1 0 must not be checked 1 1 0 unnecessary if these registers are already set unnecessary if the cpu is operating with the high-speed system clock unnecessary if this register is already set note the value of this flag can be changed only once after a re set release. this setting is not necessary if it has already been set. caution set the clock after the supply voltage has reached the operable voltage of the clock to be set (see chapter 28 electrical specification s (standard products) to chapter 31 electrical specifications ((a2) grade products: t a = ? 40 to +125 c)). (10) ? halt mode (e) set while cpu is operating wit h internal high-speed oscillation clock (b) ? halt mode (f) set while cpu is ope rating with high-speed system clock (c) ? halt mode (g) set while cpu is operating with subsystem clock (d) status transition setting (b) (e) (c) (f) (d) (g) executing halt instruction (11) ? stop mode (h) set while cp u is operating with internal hi gh-speed oscillation clock (b) ? stop mode (i) set while cpu is ope rating with high-speed system clock (c) (setting sequence) status transition setting (b) (h) (c) (i) stopping peripheral functions that cannot operate in stop mode executing stop instruction remarks 1. (a) to (i) in table 5-5 correspond to (a) to (i) in figure 5-14. 2. exclk, oscsel, amph: bits 7, 6 and 0 of the clock operation mode sele ct register (oscctl) mstop: bit 7 of the main osc control register (moc) xsel, mcm0: bits 2 and 0 of the main clock mode register (mcm) css: bit 4 of the processor clock control register (pcc) chapter 5 clock generator user?s manual u17336ej5v0ud 153 5.6.7 condition before changing cpu clo ck and processing after changing cpu clock condition before changing the cpu clock and processing after changing the cpu clock are shown below. table 5-6. changing cpu clock cpu clock before change after change condition before change processing after change x1 clock stabilization of x1 oscillation ? mstop = 0, oscsel = 1, exclk = 0 ? after elapse of oscillation stabilization time ? internal high-speed oscillator can be stopped (rstop = 1). ? clock supply to cpu is stopped for 4.06 to 16.12 s after amph has been set to 1. internal high- speed oscillation clock external main system clock enabling input of exter nal clock from exclk pin ? mstop = 0, oscsel = 1, exclk = 1 ? internal high-speed oscillator can be stopped (rstop = 1). ? clock supply to cpu is stopped for the duration of 160 external clocks from the exclk pin after amph has been set to 1. x1 clock x1 oscillation can be stopped (mstop = 1). external main system clock internal high- speed oscillation clock oscillation of internal high-speed oscillator ? rstop = 0 external main system clock input can be disabled (mstop = 1). internal high- speed oscillation clock operating current can be reduced by stopping internal high-speed oscillator (rstop = 1). x1 clock x1 oscillation can be stopped (mstop = 1). external main system clock xt1 clock stabilization of xt1 oscillation ? xtstart = 0, exclks = 0, oscsels = 1, or xtstart = 1 ? after elapse of oscillation stabilization time external main system clock input can be disabled (mstop = 1). internal high- speed oscillation clock operating current can be reduced by stopping internal high-speed oscillator (rstop = 1). x1 clock x1 oscillation can be stopped (mstop = 1). external main system clock external subsystem clock enabling input of ex ternal clock from exclks pin ? xtstart = 0, exclks = 1, oscsels = 1 external main system clock input can be disabled (mstop = 1). internal high- speed oscillation clock oscillation of internal high-speed oscillator and selection of internal high-speed oscillation clock as main system clock ? rstop = 0, mcs = 0 xt1 oscillation can be stopped or external subsystem clock input can be disabled (oscsels = 0). x1 clock stabilization of x1 oscillation and selection of high-speed system cl ock as main system clock ? mstop = 0, oscsel = 1, exclk = 0 ? after elapse of oscillation stabilization time ? mcs = 1 ? xt1 oscillation can be stopped or external subsystem clock input can be disabled (oscsels = 0). ? clock supply to cpu is stopped for 4.06 to 16.12 s after amph has been set to 1. xt1 clock, external subsystem clock external main system clock enabling input of exter nal clock from exclk pin and selection of high-speed system clock as main system clock ? mstop = 0, oscsel = 1, exclk = 1 ? mcs = 1 ? xt1 oscillation can be stopped or external subsystem clock input can be disabled (oscsels = 0). ? clock supply to cpu is stopped for the duration of 160 external clocks from the exclk pin after amph has been set to 1. chapter 5 clock generator user?s manual u17336ej5v0ud 154 5.6.8 time required for switchover of cpu clock and main system clock by setting bits 0 to 2 (pcc0 to pcc2) and bit 4 (css) of the processor clock control register (pcc), the cpu clock can be switched (between the main system clock and the s ubsystem clock) and the division ratio of the main system clock can be changed. the actual switchover operat ion is not performed immediately after rewr iting to pcc; operat ion continues on the pre-switchover clock for several clocks (see table 5-7 ). whether the cpu is oper ating on the main system clock or the sub system clock can be ascertained using bit 5 (cls) of the pcc register. table 5-7. time required for switchover of cpu clock and main system cl ock cycle division factor set value before switchover set value after switchover css pcc2 pcc1 pcc0 css pcc2 pcc1 pcc0 css pcc2 pcc1 pcc0 css p cc2 pcc1 pcc0 css pcc2 pcc1 pcc0 css pcc2 pcc1 pcc0 css pcc2 pcc1 pcc0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0 1 0 0 0 16 clocks 16 clocks 16 clocks 16 clocks 2f xp /f sub clocks 0 0 1 8 clocks 8 clocks 8 clocks 8 clocks f xp /f sub clocks 0 1 0 4 clocks 4 clocks 4 clocks 4 clocks f xp /2f sub clocks 0 1 1 2 clocks 2 clocks 2 clocks 2 clocks f xp /4f sub clocks 0 1 0 0 1 clock 1 clock 1 clock 1 clock f xp /8f sub clocks 1 2 clocks 2 clocks 2 clo cks 2 clocks 2 clocks caution selection of the main system clock cycle division factor (pcc0 to pcc2) and switchover from the main system clock to the sub system clock (changing css from 0 to 1) should not be set simultaneously. simultaneous setting is possi ble, however, for selection of th e main system cl ock cycle division factor (pcc0 to pcc2) and switchover from th e subsystem clock to th e main system clock (changing css from 1 to 0). remarks 1. the number of clocks listed in table 5-7 is the number of cpu clocks before switchover. 2. when switching the cpu clock from the main system clock to the subsystem clock, calculate the number of clocks by rounding up to the next clo ck and discarding the decimal portion, as shown below. example when switching cpu clock from f xp /2 to f sub /2 (@ oscillation with f xp = 10 mhz, f sub = 32.768 khz) f xp /f sub = 10000/32.768 ? 305.1 306 clocks by setting bit 0 (mcm0) of the main clock mode register (mcm), the main system clo ck can be switch ed (between the internal high-speed oscillation clock and the high-speed system clock). the actual switchover oper ation is not performed immediately after re writing to mcm0; operation continues on the pre-switchover clock for several clocks (see table 5-8 ). whether the cpu is operating on the internal high-speed oscillation cloc k or the high-speed system clock can be ascertained using bit 1 (mcs) of mcm. chapter 5 clock generator user?s manual u17336ej5v0ud 155 table 5-8. maximum time required for main system clock switchover set value before switchover set value after switchover mcm0 mcm0 0 1 0 1 + 2f rh /f xh clock 1 1 + 2f xh /f rh clock caution when switching the intern al high-speed oscillation clock to the high-speed system clock, bit 2 (xsel) of mcm must be set to 1 in advance. the value of xsel can be changed only once after a reset release. remarks 1. the number of clocks listed in table 5-8 is t he number of main system clocks before switchover. 2. calculate the number of clocks in t able 5-8 by removing the decimal portion. example when switching the main system clock from the internal high-speed oscillation clock to the high-speed system clock (@ oscillation with f rh = 8 mhz, f xh = 10 mhz) 1 + 2f rh /f xh = 1 + 2 8/10 = 1 + 2 0.8 = 1 + 1.6 = 2.6 2 clocks 5.6.9 conditions before cl ock oscillation is stopped the following lists the register flag settings for stopping th e clock oscillation (disabling external clock input) and conditions before the clock oscillation is stopped. table 5-9. conditions before the clo ck oscillation is stopped and flag settings clock conditions before clock oscillation is stopped (external clock input disabled) flag settings of sfr register internal high-speed oscillation clock mcs = 1 or cls = 1 (the cpu is operating on a clock ot her than the internal high-speed oscillation clock) rstop = 1 x1 clock external main system clock mcs = 0 or cls = 1 (the cpu is operating on a clock other than the high-speed system clock) mstop = 1 xt1 clock external subsystem clock cls = 0 (the cpu is operating on a clock other than the subsystem clock) oscsels = 0 chapter 5 clock generator user?s manual u17336ej5v0ud 156 5.6.10 peripheral hardware and source clocks the following lists peripheral hardware and source clocks incorpor ated in the 78k0/kc2. table 5-10. peripheral ha rdware and source clocks source clock peripheral hardware peripheral hardware clock (f prs ) subsystem clock (f sub ) internal low- speed oscillation clock (f rl ) tm50 output external clock from peripheral hardware pins 16-bit timer/ event counter 00 y n n n y (ti000 pin) note 1 50 y n n n y (ti50 pin) note 1 8-bit timer/ event counter 51 y n n n y (ti51 pin) note 1 h0 y n n y n 8-bit timer h1 y n y n n watch timer y y n n n watchdog timer n n y n n clock output note 2 y y n n n a/d converter y n n n n uart0 y n n y n uart6 y n n y n csi10 y n n n y (sck10 pin) note 1 serial interface iic0 y n n n y (exscl0, scl0 pin) note 1 notes 1. when the cpu is operating on the subsystem clock and the internal high-speed oscillation clock has been stopped, do not start operation of these functions on the external clock input from peripheral hardware pins. 2. 48-pin products only remark y: can be selected, n: cannot be selected user?s manual u17336ej5v0ud 157 chapter 6 16-bit timer/event counter 00 6.1 functions of 16-bit timer/event counter 00 16-bit timer/event counter 00 has the following functions. (1) interval timer 16-bit timer/event counter 00 generates an inte rrupt request at the preset time interval. (2) square-wave output 16-bit timer/event counter 00 can output a square wave with any selected frequency. (3) external event counter 16-bit timer/event counter 00 c an measure the number of pulses of an externally input signal. (4) one-shot pulse output 16-bit timer event counter 00 can output a one-shot pulse whose output pulse width can be set freely. (5) ppg output 16-bit timer/event counter 00 can output a rectangular wa ve whose frequency and output pulse width can be set freely. (6) pulse width measurement 16-bit timer/event counter 00 can measure the pulse width of an externally input signal. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 158 6.2 configuration of 16-bit timer/event counter 00 16-bit timer/event counter 00 includes the following hardware. table 6-1. configuration of 16-bit timer/event counter 00 item configuration time/counter 16-bit timer counter 00 (tm00) register 16-bit timer capture/compare registers 000, 010 (cr000, cr010) timer input ti000, ti010 pins timer output to00 pin, output controller control registers 16-bit timer mode control register 00 (tmc00) 16-bit timer capture/compare control register 00 (crc00) 16-bit timer output control register 00 (toc00) prescaler mode register 00 (prm00) port mode register 0 (pm0) port register 0 (p0) figures 6-1 shows the block diagram. figure 6-1. block diagram of 16-bit timer/event counter 00 internal bus capture/compare control register 00 (crc00) ti010/to00/p01 f prs f prs /2 2 f prs /2 8 f prs ti000/p00 prescaler mode register 00 (prm00) 2 prm001 prm000 crc002 16-bit timer capture/compare register 010 (cr010) match match 16-bit timer counter 00 (tm00) clear noise elimi- nator crc002 crc001 crc000 inttm000 to00/ti010/ p01 inttm010 to00 output 16-bit timer output control register 00 (toc00) 16-bit timer mode control register 00 (tmc00) internal bus tmc003 tmc002 tmc001 ovf00 toc004 lvs00 lvr00 toc001 toe00 selector 16-bit timer capture/compare register 000 (cr000) selector selector selector noise elimi- nator noise elimi- nator output controller ospe00 ospt00 output latch (p01) pm01 to cr010 caution 1. the valid edge of ti010 and timer output (to00) cannot be used fo r the p01 pin at the same time. select either of the functions. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 159 cautions 2. if clearing of bits 3 and 2 (tmc003 a nd tmc002) of 16-bit timer mode control register 00 (tmc00) to 00 and input of the capture trigger c onflict, then the capture d data is undefined. 3. to change the mode from the capture mode to the comparison mode, first clear the tmc003 and tmc002 bits to 00, and then change the setting. a value that has been once captured remains stored in cr000 unless the device is reset. if the mode has been changed to the comparis on mode, be sure to set a comparison value. (1) 16-bit timer counter 00 (tm00) tm00 is a 16-bit read-only regist er that counts count pulses. the counter is incremented in synchronization with the rising edge of the count clock. if the count value is read during operat ion, then input of the count clock is temporarily stopped, and the count value at that point is read. figure 6-2. format of 16-bit timer counter 00 (tm00) tm00 ff11h ff10h address: ff10h, ff11h after reset: 0000h r 1514131211109876543210 the count value of tm00 can be read by reading tm00 when the value of bits 3 and 2 (tmc003 and tmc002) of 16-bit timer mode control register 00 (tmc00) is other th an 00. the value of tm00 is 0000h if it is read when tmc003 and tmc002 = 00. the count value is reset to 0000h in the following cases. ? at reset signal generation ? if tmc003 and tmc002 are cleared to 00 ? if the valid edge of the ti000 pin is input in the mode in which the clear & start occurs when inputting the valid edge to the ti000 pin ? if tm00 and cr000 match in the mode in which the clear & start occurs when tm00 and cr000 match ? ospt00 is set to 1 in one-shot pulse output m ode or the valid edge is input to the ti000 pin caution even if tm00 is read, th e value is not captured by cr010. (2) 16-bit timer capture/compare regi ster 000 (cr000), 16-bit timer cap ture/compare register 010 (cr010) cr000 and cr010 are 16-bit registers that are used with a capture function or compar ison function selected by using crc00. change the value of cr000 while the timer is stopped (tmc003 and tmc002 = 00). the value of cr010 can be changed during operation if the val ue has been set in a specific way. for details, see 6.5.1 rewriting cr010 during tm00 operation . these registers can be read or written in 16-bit units. reset signal generation sets these registers to 0000h. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 160 figure 6-3. format of 16-bit timer ca pture/compare register 000 (cr000) cr000 ff13h ff12h address: ff12h, ff13h after reset: 0000h r/w 1514131211109876543210 (i) when cr000 is used as a compare register the value set in cr000 is constantly compared with the tm00 count value, and an interrupt request signal (inttm000) is generated if they match. t he value is held until cr000 is rewritten. caution cr000 does not perform the capture operati on when it is set in the comparison mode, even if a capture trigger is input to it. (ii) when cr000 is used as a capture register the count value of tm00 is captured to cr000 when a capture trigger is input. as the capture trigger, an edge of a phas e reverse to that of the ti000 pin or the valid edge of the ti010 pin can be selected by using crc00 or prm00. figure 6-4. format of 16-bit timer ca pture/compare register 010 (cr010) cr010 ff15h ff14h address: ff14h, ff15h after reset: 0000h r/w 1514131211109876543210 (i) when cr010 is used as a compare register the value set in cr010 is constantly compared with the tm00 count value, and an interrupt request signal (inttm010) is generated if they match. caution cr010 does not perform the capture operati on when it is set in the comparison mode, even if a capture trigger is input to it. (ii) when cr010 is used as a capture register the count value of tm00 is captured to cr010 when a capture trigger is input. it is possible to select the valid edge of the ti000 pin as the capture trigger. the ti000 pin valid edge is set by prm00. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 161 (iii) setting range when cr000 or cr 010 is used as a compare register when cr000 or cr010 is used as a compare register, set it as shown below. operation cr000 register setting range cr010 register setting range operation as interval timer operation as square-wave output operation as external event counter 0000h < n ffffh 0000h note m ffffh normally, this setting is not used. mask the match interrupt signal (inttm010). operation in the clear & start mode entered by ti000 pin valid edge input operation as free-running timer 0000h note n ffffh 0000h note m ffffh operation as ppg output m < n ffffh 0000h note m < n operation as one-shot pulse output 0000h note n ffffh (n m) 0000h note m ffffh (m n) note when 0000h is set, a match interrupt immediately after the timer operation does not occur and timer output is not changed, and the first match timing is as follows . a match interrupt occurs at the timing when the timer counter (tm00 register) is changed from 0000h to 0001h. ? when the timer counter is cleared due to overflow ? when the timer counter is cleared due to ti000 pin valid edge (when clear & start mode is entered by ti000 pin valid edge input) ? when the timer counter is cleared due to compare ma tch (when clear & start mode is entered by match between tm00 and cr000 (cr000 = other than 0000h, cr010 = 0000h)) operation enabled (other than 00) tm00 register timer counter clear interrupt signal is not generated interrupt signal is generated timer operation enable bit (tmc003, tmc002) interrupt request signal compare register set value (0000h) operation disabled (00) remarks 1. n: cr000 register set value, m: cr010 register set value 2. for details of tmc003 and tmc002, see 6.3 (1) 16-bit timer mode control register 00 (tmc00) . chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 162 table 6-2. capture operation of cr000 and cr010 external input signal capture operation ti000 pin input ti010 pin input set values of es001 and es000 position of edge to be captured set values of es101 and es100 position of edge to be captured 01: rising 01: rising 00: falling 00: falling crc001 = 1 ti000 pin input (reverse phase) 11: both edges (cannot be captured) crc001 bit = 0 ti010 pin input 11: both edges capture operation of cr000 interrupt signal inttm000 signal is not generated even if value is captured. interrupt signal inttm000 signal is generated each time value is captured. set values of es001 and es000 position of edge to be captured 01: rising 00: falling ti000 pin input note 11: both edges capture operation of cr010 interrupt signal inttm010 signal is generated each time value is captured. note the capture operation of cr010 is not affected by the setting of the crc001 bit. caution to capture the count value of the tm00 regi ster to the cr000 register by using the phase reverse to that input to the ti 000 pin, the interrupt request si gnal (inttm000) is not generated after the value has been captured. if the valid edge is de tected on the ti010 pin during this operation, the capture operation is not performed but the inttm 000 signal is generated as an external interrupt signal. to not use th e external interrupt, mask the inttm000 signal. remark crc001: see 6.3 (2) capture/compare control register 00 (crc00) . es101, es100, es001, es000: see 6.3 (4) prescaler mode register 00 (prm00) . chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 163 6.3 registers controlling 16- bit timer/event counter 00 registers used to control 16-bit time r/event counter 00 are shown below. ? 16-bit timer mode control register 00 (tmc00) ? capture/compare contro l register 00 (crc00) ? 16-bit timer output control register 00 (toc00) ? prescaler mode register 00 (prm00) ? port mode register 0 (pm0) ? port register 0 (p0) (1) 16-bit timer mode control register 00 (tmc00) tmc00 is an 8-bit register that sets the 16-bit time r/event counter 00 operation mode, tm00 clear mode, and output timing, and detects an overflow. rewriting tmc00 is prohibited during operation (when tm c003 and tmc002 = other than 00). however, it can be changed when tmc003 and tmc002 are cleared to 00 (s topping operation) and when ovf00 is cleared to 0. tmc00 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets tmc00 to 00h. caution 16-bit timer/event counter 00 starts operati on at the moment tmc002 and tmc003 are set to values other than 00 (operation stop mode), respectively. set tmc002 and tmc003 to 00 to stop the operation. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 164 figure 6-5. format of 16-bit timer mode control register 00 (tmc00) address: ffbah after reset: 00h r/w symbol 7 6 5 4 3 2 1 <0> tmc00 0 0 0 0 tmc003 tmc002 tmc001 ovf00 tmc003 tmc002 operation enable of 16-bit timer/event counter 00 0 0 disables 16-bit timer/event counter 00 ope ration. stops supplyi ng operating clock. clears 16-bit timer counter 00 (tm00). 0 1 free-running timer mode 1 0 clear & start mode entered by ti000 pin valid edge input note 1 1 clear & start mode entered upon a match between tm00 and cr000 tmc001 condition to reverse timer output (to00) 0 ? match between tm00 and cr000 or match between tm00 and cr010 1 ? match between tm00 and cr000 or match between tm00 and cr010 ? trigger input of ti000 pin valid edge ovf00 tm00 overflow flag clear (0) clears ovf00 to 0 or tmc003 and tmc002 = 00 set (1) overflow occurs. ovf00 is set to 1 when the value of tm00 changes from ffffh to 0000h in all the operation modes (free-running timer mode, clear & start mode entered by ti000 pin valid edge input, and clear & start mode entered upon a match between tm00 and cr000). it can also be set to 1 by writing 1 to ovf00. note the ti000 pin valid edge is set by bits 5 and 4 ( es001, es000) of prescaler mode register 00 (prm00). chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 165 (2) capture/compare control register 00 (crc00) crc00 is the register that controls the operation of cr000 and cr010. changing the value of crc00 is prohibited during oper ation (when tmc003 and tmc002 = other than 00). crc00 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation clears crc00 to 00h. figure 6-6. format of capture/comp are control register 00 (crc00) address: ffbch after reset: 00h r/w symbol 7 6 5 4 3 2 1 0 crc00 0 0 0 0 0 crc002 crc001 crc000 crc002 cr010 operating mode selection 0 operates as compare register 1 operates as capture register crc001 cr000 capture trigger selection 0 captures on valid edge of ti010 pin 1 captures on valid edge of ti000 pin by reverse phase note the valid edge of the ti010 and ti000 pin is set by prm00. if es001 and es000 are set to 11 (both edges) when crc001 is 1, the valid edge of the ti000 pin cannot be detected. crc000 cr000 operating mode selection 0 operates as compare register 1 operates as capture register if tmc003 and tmc002 are set to 11 (clear & start mode entered upon a match between tm00 and cr000), be sure to set crc000 to 0. note when the valid edge is detected from the ti010 pin, the capture opera tion is not performed but the inttm000 signal is generated as an external interrupt signal. caution to ensure that the capture operation is perf ormed properly, the capture trigger requires a pulse two cycles longer than the count clock selected by prescaler mode register 00 (prm00). chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 166 figure 6-7. example of cr010 capture operat ion (when rising edge is specified) count clock tm00 ti000 rising edge detection cr010 inttm010 n ? 3n ? 2n ? 1 n n + 1 n valid edge (3) 16-bit timer output control register 00 (toc00) toc00 is an 8-bit register t hat controls to00 output. toc00 can be rewritten while only ospt00 is oper ating (when tmc003 and tmc002 = other than 00). rewriting the other bits is prohibited during operation. however, toc004 can be rewritten during timer operation as a means to rewrite cr010 (see 6.5.1 rewriting cr010 during tm00 operation ). toc00 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation clears toc00 to 00h. caution be sure to set toc00 using the following procedure. <1> set toc004 and toc001 to 1. <2> set only toe00 to 1. <3> set either of lvs00 or lvr00 to 1. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 167 figure 6-8. format of 16-bit timer ou tput control register 00 (toc00) address: ffbdh after reset: 00h r/w symbol 7 <6> <5> 4 <3> <2> 1 <0> toc00 0 ospt00 ospe00 toc004 lvs00 lvr00 toc001 toe00 ospt00 one-shot pulse out put trigger via software 0 ? 1 one-shot pulse output the value of this bit is always ?0? when it is read. do not set this bit to 1 in a mode other than the one- shot pulse output mode. if it is set to 1, tm00 is cleared and started. ospe00 one-shot pulse output operation control 0 successive pulse output 1 one-shot pulse output one-shot pulse output operates correctly in the fr ee-running timer mode or clear & start mode entered by ti000 pin valid edge input. the one-shot pulse cannot be output in the clear & start mode entered upon a match between tm00 and cr000. toc004 to00 output control on match between cr010 and tm00 0 disables inversion operation 1 enables inversion operation the interrupt signal (inttm010) is generated even when toc004 = 0. lvs00 lvr00 setting of to00 output status 0 0 no change 0 1 initial value of to00 output is low level (to00 output is cleared to 0). 1 0 initial value of to00 output is high level (to00 output is set to 1). 1 1 setting prohibited ? lvs00 and lvr00 can be used to set the initial value of the to00 output level. if the initial value does not have to be set, leave lvs00 and lvr00 as 00. ? be sure to set lvs00 and lvr00 when toe00 = 1. lvs00, lvr00, and toe00 being simultaneously set to 1 is prohibited. ? lvs00 and lvr00 are trigger bits. by setting these bits to 1, the initial value of the to00 output level can be set. even if these bits are cleared to 0, to00 output is not affected. ? the values of lvs00 and lvr00 are always 0 when they are read. ? for how to set lvs00 and lvr00, see 6.5.2 setting lvs00 and lvr00 . ? the actual to00/ti010/p01 pin output is determined depending on pm01 and p01, besides to00 output. toc001 to00 output control on match between cr000 and tm00 0 disables inversion operation 1 enables inversion operation the interrupt signal (inttm000) is generated even when toc001 = 0. toe00 to00 output control 0 disables output (to00 output fixed to low level) 1 enables output chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 168 (4) prescaler mode register 00 (prm00) prm00 is the register that se ts the tm00 count clock and ti000 and ti010 pin input valid edges. rewriting prm00 is prohibited during operati on (when tmc003 and tmc002 = other than 00). prm00 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation clears prm00 to 00h. cautions 1. do not apply the following setting when setting the prm001 and prm000 bits to 11 (to specify the valid edge of th e ti000 pin as a count clock). ? clear & start mode entered by the ti000 pin valid edge ? setting the ti000 pin as a capture trigger 2. if the operation of the 16- bit timer/event counter 00 is enable d when the ti000 or ti010 pin is at high level and when the valid edge of the ti000 or ti010 pin is specified to be the rising edge or both edges, th e high level of the ti000 or ti010 pi n is detected as a rising edge. note this when the ti000 or ti010 pin is pulled up. however, the rising edge is not detected when the timer operation has been once stopped and then is enabled again. 3. the valid edge of ti010 and timer output (to 00) cannot be used for the p01 pin at the same time. select either of the functions. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 169 figure 6-9. format of prescaler mode register 00 (prm00) address: ffbbh after reset: 00h r/w symbol 7 6 5 4 3 2 1 0 prm00 es101 es100 es001 es000 0 0 prm001 prm000 es101 es100 ti010 pin valid edge selection 0 0 falling edge 0 1 rising edge 1 0 setting prohibited 1 1 both falling and rising edges es001 es000 ti000 pin valid edge selection 0 0 falling edge 0 1 rising edge 1 0 setting prohibited 1 1 both falling and rising edges count clock selection note 1 prm001 prm000 f prs = 2 mhz f prs = 5 mhz f prs = 10 mhz f prs = 20 mhz 0 0 f prs note 2 2 mhz 5 mhz 10 mhz 20 mhz 0 1 f prs /2 2 500 khz 1.25 mhz 2.5 mhz 5 mhz 1 0 f prs /2 8 7.81 khz 19.53 khz 39.06 khz 78.12 khz 1 1 ti000 valid edge note 3 notes 1. if the peripheral hardware clock (f prs ) operates on the high-speed system clock (f xh ) (xsel = 1), the f prs operating frequency varies depending on the supply voltage. ? v dd = 4.0 to 5.5 v: f prs 20 mhz ? v dd = 2.7 to 4.0 v: f prs 10 mhz ? v dd = 1.8 to 2.7 v: f prs 5 mhz (standard and (a) grade products only) 2. if the peripheral hardware clock (f prs ) operates on the internal high-speed oscillation clock (f rh ) (xsel = 0), when 1.8 v v dd < 2.7 v, the setting of prm001 = prm000 = 0 (count clock: f prs ) is prohibited. 3. the external clock from the ti000 pin requires a pulse longer than twice the cycle of the peripheral hardware clock (f prs ). remark f prs : peripheral hardware clock frequency chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 170 (5) port mode register 0 (pm0) this register sets port 0 input/output in 1-bit units. when using the p01/to00/ti010 pin for timer output, se t pm01 and the output latches of p01 to 0. when using the p00/ti000 and p 01/to00/ti010 pins for timer input, set pm 00 and pm01 to 1. at this time, the output latches of p00 and p01 may be 0 or 1. pm0 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets pm0 to ffh. figure 6-10. format of port mode register 0 (pm0) 7 1 6 1 5 1 4 1 3 1 2 1 1 pm01 0 pm00 symbol pm0 address: ff20h after reset: ffh r/w pm0n 0 1 p0n pin i/o mode selection (n = 0, 1) output mode (output buffer on) input mode (output buffer off) chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 171 6.4 operation of 16-bit timer/event counter 00 6.4.1 interval timer operation if bits 3 and 2 (tmc003 and tmc002) of the 16-bit timer mode co ntrol register (tmc00) are set to 11 (clear & start mode entered upon a match between tm00 and cr000), the count operation is started in synchronization with the count clock. when the value of tm00 later matches the value of cr000, tm00 is cleared to 0000h and a match interrupt signal (inttm000) is generated. this inttm000 signal ena bles tm00 to operate as an interval timer. remarks 1. for the setting of i/o pins, see 6.3 (5) port mode register 0 (pm0) . 2. for how to enable the inttm000 interrupt, see chapter 18 interrupt functions . figure 6-11. block diagram of interval timer operation figure 6-12. basic timing exampl e of interval timer operation tm00 register 0000h operable bits (tmc003, tmc002) compare register (cr000) compare match interrupt (inttm000) n 11 00 n n n n interval (n + 1) interval (n + 1) interval (n + 1) interval (n + 1) 16-bit counter (tm00) cr000 register operable bits tmc003, tmc002 count clock clear match signal inttm000 signal chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 172 figure 6-13. example of register se ttings for interval timer operation (a) 16-bit timer mode control register 00 (tmc00) 00001100 tmc003 tmc002 tmc001 ovf00 clears and starts on match between tm00 and cr000. (b) capture/compare cont rol register 00 (crc00) 00000000 crc002 crc001 crc000 cr000 used as compare register (c) 16-bit timer output control register 00 (toc00) 00000 lvr00 lvs00 toc004 ospe00 ospt00 toc001 toe00 000 (d) prescaler mode register 00 (prm00) 00000 3 2 prm001 prm000 es101 es100 es001 es000 selects count clock 0 0/1 0/1 (e) 16-bit timer counter 00 (tm00) by reading tm00, the count value can be read. (f) 16-bit capture/compare register 000 (cr000) if m is set to cr000, the interval time is as follows. ? interval time = (m + 1) count clock cycle setting cr000 to 0000h is prohibited. (g) 16-bit capture/compare register 010 (cr010) usually, cr010 is not used for the interval timer func tion. however, a compare match interrupt (inttm010) is generated when the set value of cr010 matches the value of tm00. therefore, mask the interrupt request by using the interrupt mask flag (tmmk010). chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 173 figure 6-14. example of software pr ocessing for interval timer function tm00 register 0000h operable bits (tmc003, tmc002) cr000 register inttm000 signal n 11 00 n n n <1> <2> tmc003, tmc002 bits = 11 tmc003, tmc002 bits = 00 register initial setting prm00 register, crc00 register, cr000 register, port setting initial setting of these registers is performed before setting the tmc003 and tmc002 bits to 11. starts count operation the counter is initialized and counting is stopped by clearing the tmc003 and tmc002 bits to 00. start stop <1> count operation start flow <2> count operation stop flow chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 174 6.4.2 square wave output operation when 16-bit timer/event counter 00 operates as an interval timer (see 6.4.1 ), a square wave can be output from the to00 pin by setting the 16-bit timer output control register 00 (toc00) to 03h. when tmc003 and tmc002 are set to 11 (count clear & start mode entered upon a match between tm00 and cr000), the counting operation is started in synchronizat ion with the count clock. when the value of tm00 later matches the value of cr000, tm00 is cleared to 0000h, an interrupt signal (inttm000) is generated, and to00 output is inverted. this to00 output that is inverted at fixed intervals enables to00 to output a square wave. remarks 1. for the setting of i/o pins, see 6.3 (5) port mode register 0 (pm0) . 2. for how to enable the inttm000 signal interrupt, see chapter 18 interrupt functions . figure 6-15. block diagram of square wave output operation 16-bit counter (tm00) cr000 register operable bits tmc003, tmc002 count clock clear match signal to00 output inttm000 signal output controller to00 pin figure 6-16. basic timing example of square wave output operation tm00 register 0000h operable bits (tmc003, tmc002) compare register (cr000) to00 output compare match interrupt (inttm000) n 11 00 n n n n interval (n + 1) interval (n + 1) interval (n + 1) interval (n + 1) chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 175 figure 6-17. example of register setti ngs for square wave output operation (a) 16-bit timer mode control register 00 (tmc00) 00001100 tmc003 tmc002 tmc001 ovf00 clears and starts on match between tm00 and cr000. (b) capture/compare cont rol register 00 (crc00) 00000000 crc002 crc001 crc000 cr000 used as compare register (c) 16-bit timer output control register 00 (toc00) 0 0 0 0 0/1 lvr00 lvs00 toc004 ospe00 ospt00 toc001 toe00 enables to00 output. inverts to00 output on match between tm00 and cr000. 0/1 1 1 specifies initial value of to00 output f/f (d) prescaler mode register 00 (prm00) 00000 3 2 prm001 prm000 es101 es100 es001 es000 selects count clock 0 0/1 0/1 (e) 16-bit timer counter 00 (tm00) by reading tm00, the count value can be read. (f) 16-bit capture/compare register 000 (cr000) if m is set to cr000, the interval time is as follows. ? square wave frequency = 1 / [2 (m + 1) count clock cycle] setting cr000 to 0000h is prohibited. (g) 16-bit capture/compare register 010 (cr010) usually, cr010 is not used for the square wave outpu t function. however, a compare match interrupt (inttm010) is generated when the set valu e of cr010 matches the value of tm00. therefore, mask the interrupt request by using the interrupt mask flag (tmmk010). chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 176 figure 6-18. example of software proce ssing for square wave output function tm00 register 0000h operable bits (tmc003, tmc002) cr000 register to00 output inttm000 signal to00 output control bit (toc001, toe00) tmc003, tmc002 bits = 11 tmc003, tmc002 bits = 00 register initial setting prm00 register, crc00 register, toc00 register note , cr000 register, port setting initial setting of these registers is performed before setting the tmc003 and tmc002 bits to 11. starts count operation the counter is initialized and counting is stopped by clearing the tmc003 and tmc002 bits to 00. start stop <1> count operation start flow <2> count operation stop flow n 11 00 n n n <1> <2> 00 note care must be exercised when setting toc00. for details, see 6.3 (3) 16-bit timer output control register 00 (toc00) . chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 177 6.4.3 external event counter operation when bits 1 and 0 (prm001 and prm000) of the prescaler m ode register 00 (prm00) are set to 11 (for counting up with the valid edge of the ti000 pin) and bits 3 and 2 (tmc003 and tmc002) of 16-bit timer mode control register 00 (tmc00) are set to 11, the valid edge of an external event input is counted, and a match interrupt signal indicating matching between tm00 and cr000 (inttm000) is generated. to input the external event, the ti000 pin is used. th erefore, the timer/event co unter cannot be used as an external event counter in the clear & start mode enter ed by the ti000 pin valid edge input (when tmc003 and tmc002 = 10). the inttm000 signal is generated with the following timing. ? timing of generation of inttm000 signal (second time or later) = number of times of detection of valid edge of external event (set value of cr000 + 1) however, the first match interrupt immediately after the timer/event counter has start ed operating is generated with the following timing. ? timing of generation of inttm000 signal (first time only) = number of times of detection of valid edge of external event input (set value of cr000 + 2) to detect the valid edge, the signal input to t he ti000 pin is sampled during the clock cycle of f prs . the valid edge is not detected until it is detected two times in a row. t herefore, a noise with a short pul se width can be eliminated. remarks 1. for the setting of i/o pins, see 6.3 (5) port mode register 0 (pm0) . 2. for how to enable the inttm000 signal interrupt, see chapter 18 interrupt functions . figure 6-19. block diagram of ex ternal event counter operation 16-bit counter (tm00) cr000 register operable bits tmc003, tmc002 clear match signal to00 output inttm000 signal f prs edge detection ti000 pin output controller to00 pin chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 178 figure 6-20. example of register settings in external event counter mode (1/2) (a) 16-bit timer mode control register 00 (tmc00) 00001100 tmc003 tmc002 tmc001 ovf00 clears and starts on match between tm00 and cr000. (b) capture/compare cont rol register 00 (crc00) 00000000 crc002 crc001 crc000 cr000 used as compare register (c) 16-bit timer output control register 00 (toc00) 0 0 0 0/1 0/1 lvr00 lvs00 toc004 ospe00 ospt00 toc001 toe00 0/1 0/1 0/1 0: disables to00 output 1: enables to00 output 00: does not invert to00 output on match between tm00 and cr000/cr010. 01: inverts to00 output on match between tm00 and cr000. 10: inverts to00 output on match between tm00 and cr010. 11: inverts to00 output on match between tm00 and cr000/cr010. specifies initial value of to00 output f/f (d) prescaler mode register 00 (prm00) 0 0 0/1 0/1 0 3 2 prm001 prm000 es101 es100 es001 es000 selects count clock (specifies valid edge of ti000). 00: falling edge detection 01: rising edge detection 10: setting prohibited 11: both edges detection 011 (e) 16-bit timer counter 00 (tm00) by reading tm00, the count value can be read. (f) 16-bit capture/compare register 000 (cr000) if m is set to cr000, the interrupt signal (inttm000) is generated when the num ber of external events reaches (m + 1). setting cr000 to 0000h is prohibited. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 179 figure 6-20. example of register settings in external event counter mode (2/2) (g) 16-bit capture/compare register 010 (cr010) usually, cr010 is not used in the external event counter mode. however, a compare match interrupt (inttm010) is generated when the set valu e of cr010 matches the value of tm00. therefore, mask the interrupt request by using the interrupt mask flag (tmmk010). figure 6-21. example of software proce ssing in external event counter mode tm00 register 0000h operable bits (tmc003, tmc002) 11 00 n n n tmc003, tmc002 bits = 11 tmc003, tmc002 bits = 00 register initial setting prm00 register, crc00 register, toc00 register note , cr000 register, port setting start stop <1> <2> compare match interrupt (inttm000) compare register (cr000) to00 output control bits (toc004, toc001, toe00) to00 output n 00 initial setting of these registers is performed before setting the tmc003 and tmc002 bits to 11. starts count operation the counter is initialized and counting is stopped by clearing the tmc003 and tmc002 bits to 00. <1> count operation start flow <2> count operation stop flow note care must be exercised when setting toc00. for details, see 6.3 (3) 16-bit timer output control register 00 (toc00) . chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 180 6.4.4 operation in clear & start mode entered by ti000 pin valid edge input when bits 3 and 2 (tmc003 and tmc002) of 16-bit timer mode control register 00 (tmc00) are set to 10 (clear & start mode entered by the ti000 pin va lid edge input) and the count clock (set by prm00) is supplied to the timer/event counter, tm00 starts counti ng up. when the valid edge of the ti 000 pin is detected during the counting operation, tm00 is cleared to 0000h a nd starts counting up again. if the valid edge of the ti000 pin is not detected, tm00 overflows and continues counting. the valid edge of the ti000 pin is a c ause to clear tm00. starting the counter is not controlled immediately after the start of the operation. cr000 and cr010 are used as compare registers and capture registers. (a) when cr000 and cr010 are used as compare registers signals inttm000 and inttm010 are generated when the va lue of tm00 matches the value of cr000 and cr010. (b) when cr000 and cr010 are used as capture registers the count value of tm00 is captur ed to cr000 and the inttm000 signal is generated when the valid edge is input to the ti010 pin (or when the phase reverse to that of the valid edge is input to the ti000 pin). when the valid edge is input to t he ti000 pin, the count value of tm00 is captured to cr010 and the inttm010 signal is generated. as soon as the count value has been captured, t he counter is cleared to 0000h. caution do not set the count clo ck as the valid edge of the ti000 pi n (prm001 and prm000 = 11). when prm001 and prm000 = 11, tm00 is cleared. remarks 1. for the setting of the i/o pins, see 6.3 (5) port mode register 0 (pm0) . 2. for how to enable the inttm000 signal interrupt, see chapter 18 interrupt functions . (1) operation in clear & start mode en tered by ti000 pin valid edge input (cr000: compare register , cr010: compare register) figure 6-22. block diagram of clear & start mode entered by ti000 pin valid edge input (cr000: compare register, cr010: compare register) timer counter (tm00) clear output controller edge detection compare register (cr010) match signal to00 output to00 pin match signal interrupt signal (inttm000) interrupt signal (inttm010) ti000 pin compare register (cr000) operable bits tmc003, tmc002 count clock chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 181 figure 6-23. timing example of clear & star t mode entered by ti000 pin valid edge input (cr000: compare register, cr010: compare register) (a) toc00 = 13h, prm00 = 10h, crc00, = 00h, tmc00 = 08h tm00 register 0000h operable bits (tmc003, tmc002) count clear input (ti000 pin input) compare register (cr000) compare match interrupt (inttm000) compare register (cr010) compare match interrupt (inttm010) to0 0 output m 10 m nn nn mmm 00 n (b) toc00 = 13h, prm00 = 10h, crc00, = 00h, tmc00 = 0ah tm00 register 0000h operable bits (tmc003, tmc002) count clear input (ti000 pin input) compare register (cr000) compare match interrupt (inttm000) compare register (cr010) compare match interrupt (inttm010) to00 output m 10 m nn nn mmm 00 n (a) and (b) differ as follows depending on the setting of bi t 1 (tmc001) of 16-bit timer mode control register 01 (tmc00). (a) the to00 output level is inverted wh en tm00 matches a compare register. (b) the to00 output level is inverted when tm00 matches a compare register or when the valid edge of the ti000 pin is detected. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 182 (2) operation in clear & start mode en tered by ti000 pin valid edge input (cr000: compare register , cr010: capture register) figure 6-24. block diagram of clear & start mode entered by ti000 pin valid edge input (cr000: compare register, cr010: capture register) timer counter (tm00) clear output controller edge detector capture register (cr010) capture signal to00 pin match signal to00 output interrupt signal (inttm000) interrupt signal (inttm010) ti000 pin compare register (cr000) operable bits tmc003, tmc002 count clock figure 6-25. timing example of clear & star t mode entered by ti000 pin valid edge input (cr000: compare register, cr010: capture register) (1/2) (a) toc00 = 13h, prm00 = 10h, crc00 = 04h, tmc00 = 08h, cr000 = 0001h tm00 register 0000h operable bits (tmc003, tmc002) capture & count clear input (ti000 pin input) compare register (cr000) compare match interrupt (inttm000) capture register (cr010) capture interrupt (inttm010) to00 output 0001h 10 q p n m s 00 0000h m n s p q this is an application example where the to00 output level is inverted w hen the count value has been captured & cleared. the count value is captured to cr010 and tm00 is cleared (to 0000h) when the valid edge of the ti000 pin is detected. when the count value of tm00 is 0001h, a compare match interr upt signal (inttm000) is generated, and the to00 output level is inverted. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 183 figure 6-25. timing example of clear & star t mode entered by ti000 pin valid edge input (cr000: compare register, cr010: capture register) (2/2) (b) toc00 = 13h, prm00 = 10h, crc00 = 04h, tmc00 = 0ah, cr000 = 0003h tm00 register 0000h operable bits (tmc003, tmc002) capture & count clear input (ti000 pin input) compare register (cr000) compare match interrupt (inttm000) capture register (cr010) capture interrupt (inttm010) to00 output 0003h 0003h 10 q p n m s 00 0000h m 4444 ns pq this is an application exampl e where the width set to cr0 00 (4 clocks in this example) is to be output from the to00 pin when the count value has been captured & cleared. the count value is captured to cr010, a capture interr upt signal (inttm010) is gener ated, tm00 is cleared (to 0000h), and the to00 output level is inverted when the valid edge of the ti000 pin is detected. when the count value of tm00 is 0003h (four clocks have been counted), a compare match interrupt signal (inttm000) is generated and the to00 outpu t level is inverted. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 184 (3) operation in clear & start mode en tered by ti000 pin valid edge input (cr000: capture register , cr010: compare register) figure 6-26. block diagram of clear & start mode entered by ti000 pin valid edge input (cr000: capture register, cr010: compare register) timer counter (tm00) clear output controller edge detection capture register (cr000) capture signal to00 pin match signal to00 output interrupt signal (inttm010) interrupt signal (inttm000) ti000 pin compare register (cr010) operable bits tmc003, tmc002 count clock chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 185 figure 6-27. timing example of clear & start mode entered by ti000 pin valid edge input (cr000: capture register, cr010: compare register) (1/2) (a) toc00 = 13h, prm00 = 10h, crc00 = 03h, tmc00 = 08h, cr010 = 0001h tm00 register 0000h operable bits (tmc003, tmc002) capture & count clear input (ti000 pin input) capture register (cr000) capture interrupt (inttm000) compare register (cr010) compare match interrupt (inttm010) to00 output 10 p n m s 00 l 0001h 0000h mns p this is an application example where the to00 output le vel is to be inverted when the count value has been captured & cleared. tm00 is cleared at the rising edge det ection of the ti000 pin and it is captured to cr000 at the falling edge detection of the ti000 pin. when bit 1 (crc001) of capture/compare control register 00 (crc00) is set to 1, the count value of tm00 is captured to cr000 in the phase reverse to that of the signa l input to the ti000 pin, but the capture interrupt signal (inttm000) is not generated. however, the inttm000 sig nal is generated when the valid edge of the ti010 pin is detected. mask the inttm000 signal when it is not used. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 186 figure 6-27. timing example of clear & star t mode entered by ti000 pin valid edge input (cr000: capture register, cr010: compare register) (2/2) (b) toc00 = 13h, prm00 = 10h, crc00 = 03h, tmc00 = 0ah, cr010 = 0003h tm00 register 0000h operable bits (tmc003, tmc002) capture & count clear input (ti000 pin input) capture register (cr000) capture interrupt (inttm000) compare register (cr010) compare match interrupt (inttm010) to00 output 0003h 0003h 10 p n m s 00 4444 l 0000h m n s p this is an application exampl e where the width set to cr0 10 (4 clocks in this example) is to be output from the to00 pin when the count value has been captured & cleared. tm00 is cleared (to 0000h) at the rising edge detection of the ti000 pin and captur ed to cr000 at the falling edge detection of the ti000 pin. t he to00 output level is inverted when tm00 is cleared (to 0000h) because the rising edge of the ti000 pin has been detected or when t he value of tm00 matches that of a compare register (cr010). when bit 1 (crc001) of capture/compare control register 00 (crc00) is 1, the count value of tm00 is captured to cr000 in the phase reverse to that of the input si gnal of the ti000 pin, but th e capture interrupt signal (inttm000) is not generated. however, the inttm000 inte rrupt is generated when t he valid edge of the ti010 pin is detected. mask the inttm000 signal when it is not used. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 187 (4) operation in clear & start mode en tered by ti000 pin valid edge input (cr000: capture register , cr010: capture register) figure 6-28. block diagram of clear & start mode entered by ti000 pin valid edge input (cr000: capture register, cr010: capture register) timer counter (tm00) clear to00 output output controller capture register (cr000) capture signal capture signal to00 pin note interrupt signal (inttm010) interrupt signal (inttm000) capture register (cr010) operable bits tmc003, tmc002 count clock edge detection ti000 pin edge detection ti010 pin note selector note the timer output (to00) cannot be used when det ecting the valid edge of the ti010 pin is used. figure 6-29. timing example of clear & start mode entered by ti000 pin valid edge input (cr000: capture register, cr010: capture register) (1/3) (a) toc00 = 13h, prm00 = 30h, crc00 = 05h, tmc00 = 0ah tm00 register 0000h operable bits (tmc003, tmc002) capture & count clear input (ti000 pin input) capture register (cr000) capture interrupt (inttm000) capture register (cr010) capture interrupt (inttm010) to00 output 10 r s t o l m n p q 00 l 0000h 0000h lm nopqrst this is an application example where the count value is captured to cr010, tm00 is cleared, and to00 output is inverted when the rising or falli ng edge of the ti000 pin is detected. when the edge of the ti010 pin is det ected, an interrupt signal (inttm000) is generated. mask the inttm000 signal when it is not used. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 188 figure 6-29. timing example of clear & start mode entered by ti000 pin valid edge input (cr000: capture register, cr010: capture register) (2/3) (b) toc00 = 13h, prm00 = c0h, crc00 = 05h, tmc00 = 0ah tm00 register 0000h operable bits (tmc003, tmc002) capture trigger input (ti010 pin input) capture register (cr000) capture interrupt (inttm000) capture & count clear input (ti000) capture register (cr010) capture interrupt (inttm010) 10 r s t o l m n p q 00 ffffh l l 0000h 0000h lmn o pq r s t this is a timing example where an edge is not input to the ti000 pin, in an applicatio n where the count value is captured to cr000 when the rising or fa lling edge of the ti010 pin is detected. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 189 figure 6-29. timing example of clear & start mode entered by ti000 pin valid edge input (cr000: capture register, cr010: capture register) (3/3) (c) toc00 = 13h, prm00 = 00h, crc00 = 07h, tmc00 = 0ah tm00 register 0000h operable bits (tmc003, tmc002) capture & count clear input (ti000 pin input) capture register (cr000) capture register (cr010) capture interrupt (inttm010) capture input (ti010) capture interrupt (inttm000) 0000h 10 p o m q r t s w n l 00 l l ln r pt 0000h moq sw this is an application example where the pulse width of the signal input to the ti000 pin is measured. by setting crc00, the count value can be captured to cr000 in the phase reverse to the falling edge of the ti000 pin (i.e., rising edge) and to cr010 at the falling edge of the ti000 pin. the high- and low-level widths of the input pulse can be calculated by the following expressions. ? high-level width = [cr010 value] ? [cr000 value] [count clock cycle] ? low-level width = [cr000 value] [count clock cycle] if the reverse phase of the ti000 pin is selected as a tri gger to capture the count value to cr000, the inttm000 signal is not generated. read the values of cr000 an d cr010 to measure the pulse width immediately after the inttm010 signal is generated. however, if the valid edge specified by bits 6 and 5 (e s101 and es100) of prescaler mode register 00 (prm00) is input to the ti010 pin, the count value is not captured but the inttm00 0 signal is generated. to measure the pulse width of the ti000 pin, mask the inttm000 signal when it is not used. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 190 figure 6-30. example of register settings in clear & st art mode entered by ti000 pin valid edge input (1/2) (a) 16-bit timer mode control register 00 (tmc00) 0000100/10 tmc003 tmc002 tmc001 ovf00 clears and starts at valid edge input of ti000 pin. 0: inverts to00 output on match between tm00 and cr000/cr010. 1: inverts to00 output on match between tm00 and cr000/cr010 and valid edge of ti000 pin. (b) capture/compare cont rol register 00 (crc00) 000000/10/10/1 crc002 crc001 crc000 0: cr000 used as compare register 1: cr000 used as capture register 0: cr010 used as compare register 1: cr010 used as capture register 0: ti010 pin is used as capture trigger of cr000. 1: reverse phase of ti000 pin is used as capture trigger of cr000. (c) 16-bit timer output control register 00 (toc00) 0 0 0 0/1 0/1 lvr00 lvs00 toc004 ospe00 ospt00 toc001 toe00 0: disables to00 output note 1: enables to00 output 00: does not invert to00 output on match between tm00 and cr000/cr010. 01: inverts to00 output on match between tm00 and cr000. 10: inverts to00 output on match between tm00 and cr010. 11: inverts to00 output on match between tm00 and cr000/cr010. specifies initial value of to00 output f/f 0/1 0/1 0/1 note the timer output (to00) cannot be used when det ecting the valid edge of the ti010 pin is used. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 191 figure 6-30. example of register settings in clear & st art mode entered by ti000 pin valid edge input (2/2) (d) prescaler mode register 00 (prm00) 0/1 0/1 0/1 0/1 0 3 2 prm001 prm000 es101 es100 es001 es000 count clock selection (setting ti000 valid edge is prohibited) 00: falling edge detection 01: rising edge detection 10: setting prohibited 11: both edges detection (setting prohibited when crc001 = 1) 00: falling edge detection 01: rising edge detection 10: setting prohibited 11: both edges detection 0 0/1 0/1 (e) 16-bit timer counter 00 (tm00) by reading tm00, the count value can be read. (f) 16-bit capture/compare register 000 (cr000) when this register is used as a compare register an d when its value matches the count value of tm00, an interrupt signal (inttm000) is generated. the count value of tm00 is not cleared. to use this register as a capture regist er, select either the ti000 or ti010 pin note input as a capture trigger. when the valid edge of the capture tr igger is detected, the count va lue of tm00 is stored in cr000. note the timer output (to00) cannot be used when detection of the vali d edge of the ti010 pin is used. (g) 16-bit capture/compare register 010 (cr010) when this register is used as a compare register an d when its value matches the count value of tm00, an interrupt signal (inttm010) is generated. the count value of tm00 is not cleared. when this register is used as a capt ure register, the ti000 pi n input is used as a capture trigger. when the valid edge of the capture trigger is detected, the count value of tm00 is stored in cr010. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 192 figure 6-31. example of software processing in clear & start mode entered by ti000 pin valid edge input tm00 register 0000h operable bits (tmc003, tmc002) count clear input (ti000 pin input) compare register (cr000) compare match interrupt (inttm000) compare register (cr010) compare match interrupt (inttm010) to00 output m 10 m n n n n mmm 00 <1> <2> <2> <2> <3> <2> 00 n tmc003, tmc002 bits = 10 edge input to ti000 pin register initial setting prm00 register, crc00 register, toc0 0 register note , cr000, cr010 registers, tmc00.tmc001 bit, port setting initial setting of these registers is performed before setting the tmc003 and tmc002 bits to 10. starts count operation when the valid edge is input to the ti000 pin, the value of the tm00 register is cleared. start <1> count operation start flow <2> tm00 register clear & start flow tmc003, tmc002 bits = 00 the counter is initialized and counting is stopped by clearing the tmc003 and tmc002 bits to 00. stop <3> count operation stop flow note care must be exercised when setting toc00. for details, see 6.3 (3) 16-bit timer output control register 00 (toc00) . chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 193 6.4.5 free-running timer operation when bits 3 and 2 (tmc003 and tmc002) of 16-bit timer mode control register 00 (t mc00) are set to 01 (free- running timer mode), 16-bit timer/event counter 00 continues counting up in synchronization with the count clock. when it has counted up to ffffh, the over flow flag (ovf00) is set to 1 at t he next clock, and tm00 is cleared (to 0000h) and continues counting. clear ovf00 to 0 by executing the clr instruction via software. the following three types of free-runn ing timer operations are available. ? both cr000 and cr010 are used as compare registers. ? one of cr000 or cr010 is used as a compare regi ster and the other is us ed as a capture register. ? both cr000 and cr010 are used as capture registers. remarks 1. for the setting of the i/o pins, see 6.3 (5) port mode register 0 (pm0) . 2. for how to enable the inttm000 signal interrupt, see chapter 18 interrupt functions . (1) free-running timer mode operation (cr000: compare register , cr010: compare register) figure 6-32. block diagram of free-running timer mode (cr000: compare register, cr010: compare register) timer counter (tm00) output controller compare register (cr010) match signal to00 pin match signal to00 output interrupt signal (inttm000) interrupt signal (inttm010) compare register (cr000) operable bits tmc003, tmc002 count clock chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 194 figure 6-33. timing example of free-running timer mode (cr000: compare register, cr010: compare register) ? toc00 = 13h, prm00 = 00h, crc00 = 00h, tmc00 = 04h ffffh tm00 register 0000h operable bits (tmc003, tmc002) compare register (cr000) compare match interrupt (inttm000) compare register (cr010) compare match interrupt (inttm010) to00 output ovf00 bit 01 m n m n m n m n 00 00 n 0 write clear 0 write clear 0 write clear 0 write clear m this is an application example where two compare registers are used in the free-running timer mode. the to00 output level is inverted each time the count valu e of tm00 matches the set value of cr000 or cr010. when the count value matches the register val ue, the inttm000 or inttm010 signal is generated. (2) free-running timer mode operation (cr000: compare register , cr010: capture register) figure 6-34. block diagram of free-running timer mode (cr000: compare register, cr010: capture register) timer counter (tm00) output controller edge detection capture register (cr010) capture signal to00 pin match signal to00 output interrupt signal (inttm000) interrupt signal (inttm010) ti000 pin compare register (cr000) operable bits tmc003, tmc002 count clock chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 195 figure 6-35. timing example of free-running timer mode (cr000: compare register, cr010: capture register) ? toc00 = 13h, prm00 = 10h, crc00 = 04h, tmc00 = 04h ffffh tm00 register 0000h operable bits (tmc003, tmc002) capture trigger input (ti000) compare register (cr000) compare match interrupt (inttm000) capture register (cr010) capture interrupt (inttm010) to00 output overflow flag (ovf00) 0 write clear 0 write clear 0 write clear 0 write clear 01 m n s p q 00 0000h 0000h mn s p q this is an application example where a compare register an d a capture register are used at the same time in the free-running timer mode. in this example, the inttm000 signal is generated an d the to00 output level is inverted each time the count value of tm00 matches the set value of cr000 (compar e register). in addition, the inttm010 signal is generated and the count value of tm00 is captured to cr010 each time the valid edge of the ti000 pin is detected. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 196 (3) free-running timer mode operation (cr000: capture register , cr010: capture register) figure 6-36. block diagram of free-running timer mode (cr000: capture register, cr010: capture register) timer counter (tm00) capture register (cr000) capture signal capture signal interrupt signal (inttm010) interrupt signal (inttm000) capture register (cr010) operable bits tmc003, tmc002 count clock edge detection ti000 pin edge detection ti010 pin selector remark if both cr000 and cr010 are used as capture regist ers in the free-running timer mode, the to00 output level is not inverted. however, it can be inverted each time the valid e dge of the ti000 pin is detec ted if bit 1 (tmc001) of 16-bit timer mode control register 00 (tmc00) is set to 1. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 197 figure 6-37. timing example of free-running timer mode (cr000: capture register, cr010: capture register) (1/2) (a) toc00 = 13h, prm00 = 50h, crc00 = 05h, tmc00 = 04h ffffh tm00 register 0000h operable bits (tmc003, tmc002) capture trigger input (ti000) capture register (cr010) capture interrupt (inttm010) capture trigger input (ti010) capture register (cr000) capture interrupt (inttm000) overflow flag (ovf00) 01 m a b c de n s p q 00 0 write clear 0 write clear 0 write clear 0 write clear 0000h abc d e 0000h mn s p q this is an application example where the count values that have been captured at the valid edges of separate capture trigger signals are stor ed in separate capture registers in the free-running timer mode. the count value is captured to cr010 when the valid edge of the ti000 pi n input is detected and to cr000 when the valid edge of the ti010 pin input is detected. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 198 figure 6-37. timing example of free-running timer mode (cr000: capture register, cr010: capture register) (2/2) (b) toc00 = 13h, prm00 = c0h, crc00 = 05h, tmc00 = 04h ffffh tm00 register 0000h operable bits (tmc003, tmc002) capture trigger input (ti010) capture register (cr000) capture interrupt (inttm000) capture trigger input (ti000) capture register (cr010) capture interrupt (inttm010) 01 l m p s n o r q t 00 0000h 0000h lmn o pq r s t l l this is an application example wh ere both the edges of the ti010 pin ar e detected and the count value is captured to cr000 in the free-running timer mode. when both cr000 and cr010 are used as capture register s and when the valid edge of only the ti010 pin is to be detected, the count value cannot be captured to cr010. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 199 figure 6-38. example of register setti ngs in free-running timer mode (1/2) (a) 16-bit timer mode control register 00 (tmc00) 0000010/10 tmc003 tmc002 tmc001 ovf00 free-running timer mode 0: inverts to00 output on match between tm00 and cr000/cr010. 1: inverts to00 output on match between tm00 and cr000/cr010 and valid edge of ti000 pin. (b) capture/compare cont rol register 00 (crc00) 000000/10/10/1 crc002 crc001 crc000 0: cr000 used as compare register 1: cr000 used as capture register 0: cr010 used as compare register 1: cr010 used as capture register 0: ti010 pin is used as capture trigger of cr000. 1: reverse phase of ti000 pin is used as capture trigger of cr000. (c) 16-bit timer output control register 00 (toc00) 0 0 0 0/1 0/1 lvr00 lvs00 toc004 ospe00 ospt00 toc001 toe00 0: disables to00 output 1: enables to00 output 00: does not invert to00 output on match between tm00 and cr000/cr010. 01: inverts to00 output on match between tm00 and cr000. 10: inverts to00 output on match between tm00 and cr010. 11: inverts to00 output on match between tm00 and cr000/cr010. specifies initial value of to00 output f/f 0/1 0/1 0/1 chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 200 figure 6-38. example of register setti ngs in free-running timer mode (2/2) (d) prescaler mode register 00 (prm00) 0/1 0/1 0/1 0/1 0 3 2 prm001 prm000 es101 es100 es001 es000 count clock selection (setting ti000 valid edge is prohibited) 00: falling edge detection 01: rising edge detection 10: setting prohibited 11: both edges detection (setting prohibited when crc001 = 1) 00: falling edge detection 01: rising edge detection 10: setting prohibited 11: both edges detection 0 0/1 0/1 (e) 16-bit timer counter 00 (tm00) by reading tm00, the count value can be read. (f) 16-bit capture/compare register 000 (cr000) when this register is used as a compare register an d when its value matches the count value of tm00, an interrupt signal (inttm000) is generated. the count value of tm00 is not cleared. to use this register as a capture register, select ei ther the ti000 or ti010 pin in put as a capture trigger. when the valid edge of the capture tr igger is detected, the count va lue of tm00 is stored in cr000. (g) 16-bit capture/compare register 010 (cr010) when this register is used as a compare register an d when its value matches the count value of tm00, an interrupt signal (inttm010) is generated. the count value of tm00 is not cleared. when this register is used as a capt ure register, the ti000 pi n input is used as a capture trigger. when the valid edge of the capture trigger is detected, the count value of tm00 is stored in cr010. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 201 figure 6-39. example of software pr ocessing in free-running timer mode ffffh tm00 register 0000h operable bits (tmc003, tmc002) compare register (cr000) compare match interrupt (inttm000) compare register (cr010) compare match interrupt (inttm010) timer output control bits (toe0, toc004, toc001) to00 output m 01 n n n n m m m 00 <1> <2> 00 n tmc003, tmc002 bits = 0, 1 register initial setting prm00 register, crc00 register, toc00 register note , cr000/cr010 register, tmc00.tmc001 bit, port setting initial setting of these registers is performed before setting the tmc003 and tmc002 bits to 01. starts count operation start <1> count operation start flow tmc003, tmc002 bits = 0, 0 the counter is initialized and counting is stopped by clearing the tmc003 and tmc002 bits to 00. stop <2> count operation stop flow note care must be exercised when setting toc00. for details, see 6.3 (3) 16-bit timer output control register 00 (toc00) . chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 202 6.4.6 ppg output operation a square wave having a pulse width set in advance by cr010 is output from the to00 pin as a ppg (programmable pulse generator) signal during a cycle set by cr000 when bits 3 and 2 (tmc003 and tmc002) of 16- bit timer mode control register 00 (tmc00) are set to 11 (clear & start upon a match between tm00 and cr000). the pulse cycle and duty factor of the pulse generated as the ppg output are as follows. ? pulse cycle = (set value of cr000 + 1) count clock cycle ? duty = (set value of cr010 + 1) / (set value of cr000 + 1) caution to change the duty factor (value of cr010) during operation, see 6.5. 1 rewriting cr010 during tm00 operation. remarks 1. for the setting of i/o pins, see 6.3 (5) port mode register 0 (pm0) . 2. for how to enable the inttm000 signal interrupt, see chapter 18 interrupt functions . figure 6-40. block diagram of ppg output operation timer counter (tm00) clear output controller compare register (cr010) match signal to00 pin match signal to00 output interrupt signal (inttm000) interrupt signal (inttm010) compare register (cr000) operable bits tmc003, tmc002 count clock chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 203 figure 6-41. example of register settings for ppg output operation (a) 16-bit timer mode control register 00 (tmc00) 00001100 tmc003 tmc002 tmc001 ovf00 clears and starts on match between tm00 and cr000. (b) capture/compare cont rol register 00 (crc00) 00000000 crc002 crc001 crc000 cr000 used as compare register cr010 used as compare register (c) 16-bit timer output control register 00 (toc00) 0 0 0 1 0/1 lvr00 lvs00 toc004 ospe00 ospt00 toc001 toe00 enables to00 output 11: inverts to00 output on match between tm00 and cr000/cr010. 00: disables one-shot pulse output specifies initial value of to00 output f/f 0/1 1 1 (d) prescaler mode register 00 (prm00) 00000 3 2 prm001 prm000 es101 es100 es001 es000 selects count clock 0 0/1 0/1 (e) 16-bit timer counter 00 (tm00) by reading tm00, the count value can be read. (f) 16-bit capture/compare register 000 (cr000) an interrupt signal (inttm000) is generated when the value of this register matches the count value of tm00. the count value of tm00 is not cleared. (g) 16-bit capture/compare register 010 (cr010) an interrupt signal (inttm010) is generated when the value of this register matches the count value of tm00. the count value of tm00 is not cleared. caution set values to cr000 and cr010 such that the condition 0000h cr010 < cr000 ffffh is satisfied. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 204 figure 6-42. example of software pr ocessing for ppg output operation tm00 register 0000h operable bits (tmc003, tmc002) compare register (cr000) compare match interrupt (inttm000) compare register (cr010) compare match interrupt (inttm010) timer output control bits (toe00, toc004, toc001) to00 output m 11 m m m n n n 00 <1> n + 1 <2> 00 n tmc003, tmc002 bits = 11 register initial setting prm00 register, crc00 register, toc00 register note , cr000, cr010 registers, port setting initial setting of these registers is performed before setting the tmc003 and tmc002 bits. starts count operation start <1> count operation start flow tmc003, tmc002 bits = 00 the counter is initialized and counting is stopped by clearing the tmc003 and tmc002 bits to 00. stop <2> count operation stop flow n + 1 n + 1 m + 1 m + 1 m + 1 note care must be exercised when setting toc00. for details, see 6.3 (3) 16-bit timer output control register 00 (toc00) . remark ppg pulse cycle = (m + 1) count clock cycle ppg duty = (n + 1) / (m + 1) chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 205 6.4.7 one-shot pulse output operation a one-shot pulse can be output by setting bits 3 and 2 (tmc003 and tmc002) of the 16-bit timer mode control register 00 (tmc00) to 01 (free-running timer mode) or to 10 (clear & start mode entered by the ti000 pin valid edge) and setting bit 5 (ospe00) of 16-bit timer ou tput control register 00 (toc00) to 1. when bit 6 (ospt00) of toc00 is set to 1 or when the valid edge is input to the ti000 pin during timer operation, clearing & starting of tm00 is triggered, and a pulse of the difference between the values of cr000 and cr010 is output only once from the to00 pin. cautions 1. do not input the trigger again (setting ospt00 to 1 or detecting the valid edge of the ti000 pin) while the one-shot pulse is output. to out put the one-shot pulse again, generate the trigger after the current one-s hot pulse output has completed. 2. to use only the setting of ospt00 to 1 as the trigger of one-shot pulse output, do not change the level of the ti000 pin or it s alternate function port pin. otherwise, the pulse will be unexpectedly output. remarks 1. for the setting of the i/o pins, see 6.3 (5) port mode register 0 (pm0) . 2. for how to enable the inttm000 signal interrupt, see chapter 18 interrupt functions . figure 6-43. block diagram of on e-shot pulse output operation timer counter (tm00) output controller compare register (cr010) match signal to00 pin match signal to00 output interrupt signal (inttm000) interrupt signal (inttm010) compare register (cr000) operable bits tmc003, tmc002 count clock ti000 edge detection ospt00 bit ospe00 bit clear chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 206 figure 6-44. example of register settings for one-shot pulse output operation (1/2) (a) 16-bit timer mode control register 00 (tmc00) 00000/10/100 tmc003 tmc002 tmc001 ovf00 01: free running timer mode 10: clear and start mode by valid edge of ti000 pin. (b) capture/compare cont rol register 00 (crc00) 00000000 crc002 crc001 crc000 cr000 used as compare register cr010 used as compare register (c) 16-bit timer output control register 00 (toc00) 0 0/1 1 1 0/1 lvr00 lvs00 toc004 ospe00 ospt00 toc001 toe00 enables to00 output inverts to00 output on match between tm00 and cr000/cr010. specifies initial value of to00 output enables one-shot pulse output software trigger is generated by writing 1 to this bit (operation is not affected even if 0 is written to it). 0/1 1 1 (d) prescaler mode register 00 (prm00) 00000 3 2 prm001 prm000 es101 es100 es001 es000 selects count clock 0 0/1 0/1 chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 207 figure 6-44. example of register settings for one-shot pulse output operation (2/2) (e) 16-bit timer counter 00 (tm00) by reading tm00, the count value can be read. (f) 16-bit capture/compare register 000 (cr000) this register is used as a compar e register when a one-shot pulse is output. when the value of tm00 matches that of cr000, an interrupt signal (inttm000) is generated and the to00 output level is inverted. (g) 16-bit capture/compare register 010 (cr010) this register is used as a compar e register when a one-shot pulse is output. when the value of tm00 matches that of cr010, an interrupt signal (inttm010) is generated and the to00 output level is inverted. caution do not set the same value to cr000 and cr010. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 208 figure 6-45. example of software processing for one-shot pulse output operation (1/2) ffffh tm00 register 0000h operable bits (tmc003, tmc002) one-shot pulse enable bit (ospe0) one-shot pulse trigger bit (ospt0) one-shot pulse trigger input (ti000 pin) overflow plug (ovf00) compare register (cr000) compare match interrupt (inttm000) compare register (cr010) compare match interrupt (inttm010) to00 output to00 output control bits (toe00, toc004, toc001) n m n ? m n ? m 01 or 10 00 00 n n n m m m m + 1 m + 1 <1> <2> <2> <3> to00 output level is not inverted because no one- shot trigger is input. ? time from when the one-shot pulse trigger is input until the one-shot pulse is output = (m + 1) count clock cycle ? one-shot pulse output active level width = (n ? m) count clock cycle chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 209 figure 6-45. example of software processing for one-shot pulse output operation (2/2) tmc003, tmc002 bits = 01 or 10 register initial setting prm00 register, crc00 register, toc00 register note , cr000, cr010 registers, port setting initial setting of these registers is performed before setting the tmc003 and tmc002 bits. starts count operation start <1> count operation start flow <2> one-shot trigger input flow tmc003, tmc002 bits = 00 the counter is initialized and counting is stopped by clearing the tmc003 and tmc002 bits to 00. stop <3> count operation stop flow toc00.ospt00 bit = 1 or edge input to ti000 pin write the same value to the bits other than the ostp00 bit. note care must be exercised when setting toc00. for details, see 6.3 (3) 16-bit timer output control register 00 (toc00) . chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 210 6.4.8 pulse width measurement operation tm00 can be used to measure the pulse width of the signal input to the ti000 and ti010 pins. measurement can be accomplished by operating the 16-bit ti mer/event counter 00 in the free-running timer mode or by restarting the timer in synchronizati on with the signal input to the ti000 pin. when an interrupt is generated, read the value of the valid capture register and measure the pulse width. check bit 0 (ovf00) of 16-bit timer mode control register 00 (tmc 00). if it is set (to 1), clear it to 0 by software. figure 6-46. block di agram of pulse width measureme nt (free-running timer mode) timer counter (tm00) capture register (cr000) capture signal capture signal interrupt signal (inttm010) interrupt signal (inttm000) capture register (cr010) operable bits tmc003, tmc002 count clock edge detection ti000 pin edge detection ti010 pin selector figure 6-47. block diagram of pulse width measurement (clear & start mode entered by ti000 pin valid edge input) timer counter (tm00) capture register (cr000) capture signal capture signal interrupt signal (inttm010) interrupt signal (inttm000) capture register (cr010) operable bits tmc003, tmc002 count clock edge detection ti000 pin edge detection ti010 pin clear selector chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 211 a pulse width can be measured in the following three ways. ? measuring the pulse width by using two input signals of the ti000 and ti010 pins (free-running timer mode) ? measuring the pulse width by using one input signal of the ti000 pin (free-running timer mode) ? measuring the pulse width by using one input signal of the ti000 pin (clear & start mode entered by the ti000 pin valid edge input) remarks 1. for the setting of the i/o pins, see 6.3 (5) port mode register 0 (pm0) . 2. for how to enable the inttm000 signal interrupt, see chapter 18 interrupt functions . (1) measuring the pulse width by using two input si gnals of the ti000 and ti010 pins (free-running timer mode) set the free-running timer mode (tmc003 and tmc002 = 01). when the valid edge of t he ti000 pin is detected, the count value of tm00 is captured to cr010. when the valid edge of the ti 010 pin is detected, the count value of tm00 is captured to cr000. specify detecti on of both the edges of the ti000 and ti010 pins. by this measurement method, the prev ious count value is subt racted from the count valu e captured by the edge of each input signal. therefore, sa ve the previously captured value to a separate register in advance. if an overflow occurs, the value becomes negative if the pr eviously captured value is si mply subtracted from the current captured value and, t herefore, a borrow occurs (bit 0 (cy) of the program status word (psw) is set to 1). if this happens, ignore cy and take the calculated value as the pulse width. in addition, clear bit 0 (ovf00) of 16-bit timer mode control register 00 (tmc00) to 0. figure 6-48. timing example of pulse width measurement (1) ? tmc00 = 04h, prm00 = f0h, crc00 = 05h ffffh tm00 register 0000h operable bits (tmc003, tmc002) capture trigger input (ti000) capture register (cr010) capture interrupt (inttm010) capture trigger input (ti010) capture register (cr000) capture interrupt (inttm000) overflow flag (ovf00) 01 m a b c de n s p q 00 0 write clear 0 write clear 0 write clear 0 write clear 0000h abc d e 0000h mn s p q chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 212 (2) measuring the pulse width by using one input signal of the ti000 pin (free-running mode) set the free-running timer mode (tmc003 and tmc002 = 01). the count value of tm00 is captured to cr000 in the phase reverse to the valid edge detec ted on the ti000 pin. when the valid edge of the ti000 pin is detected, the count value of tm00 is captured to cr010. by this measurement method, values are stored in se parate capture registers when a width from one edge to another is measured. theref ore, the capture values do not have to be saved. by subtracting the value of one capture register from that of a nother, a high-level width, low-level width, and cycle are calculated. if an overflow occurs, the value becomes negative if one c aptured value is simply subtracted from another and, therefore, a borrow occurs (bit 0 (cy) of the program status word (psw) is set to 1). if this happens, ignore cy and take the calculated value as the pulse width. in addi tion, clear bit 0 (ovf00) of 16-bit timer mode control register 00 (tmc00) to 0. figure 6-49. timing example of pulse width measurement (2) ? tmc00 = 04h, prm00 = 10h, crc00 = 07h ffffh tm00 register 0000h operable bits (tmc003, tmc002) capture trigger input (ti000) capture register (cr000) capture register (cr010) capture interrupt (inttm010) overflow flag (ovf00) capture trigger input (ti010) capture interrupt (inttm000) 01 m a b c de n s p q 00 0 write clear 0 write clear 0 write clear 0 write clear 0000h l l abc d e 0000h mn s p q chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 213 (3) measuring the pulse width by using one input signal of the ti000 pin (clear & start mode entered by the ti000 pin valid edge input) set the clear & start mode entered by the ti000 pin valid edge (tmc003 and tmc002 = 10). the count value of tm00 is captured to cr000 in the phase reverse to the valid edge of the ti000 pin, and the count value of tm00 is captured to cr010 and tm00 is cleared (0000h) when t he valid edge of the ti000 pin is detected. therefore, a cycle is stored in cr010 if tm00 does not overflow. if an overflow occurs, take the value that results from adding 10000h to the value stored in cr010 as a cycle. clear bit 0 (ovf00) of 16-bit timer mode control register 00 (tmc00) to 0. figure 6-50. timing example of pulse width measurement (3) ? tmc00 = 08h, prm00 = 10h, crc00 = 07h ffffh tm00 register 0000h operable bits (tmc003, tmc002) capture & count clear input (ti000) capture register (cr000) capture register (cr010) capture interrupt (inttm010) overflow flag (ovf00) capture trigger input (ti010) capture interrupt (inttm000) 10 <1> <2> <3> <3> <3> <3> <2> <2> <2> <1> <1> <1> m a b cd n s p q 00 00 0 write clear 0000h l l abc d 0000h mn s p q <1> pulse cycle = (10000h number of times ovf00 bit is set to 1 + captured value of cr010) count clock cycle <2> high-level pulse width = (10000h number of times ovf00 bit is set to 1 + captured value of cr000) count clock cycle <3> low-level pulse width = (pulse cycle ? high-level pulse width) chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 214 figure 6-51. example of register setti ngs for pulse width measurement (1/2) (a) 16-bit timer mode control register 00 (tmc00) 00000/10/100 tmc003 tmc002 tmc001 ovf00 01: free running timer mode 10: clear and start mode entered by valid edge of ti000 pin. (b) capture/compare cont rol register 00 (crc00) 0000010/11 crc002 crc001 crc000 1: cr000 used as capture register 1: cr010 used as capture register 0: ti010 pin is used as capture trigger of cr000. 1: reverse phase of ti000 pin is used as capture trigger of cr000. (c) 16-bit timer output control register 00 (toc00) 00000 lvr00 lvs00 toc004 ospe00 ospt00 toc001 toe00 000 (d) prescaler mode register 00 (prm00) 0/1 0/1 0/1 0/1 0 3 2 prm001 prm000 es101 es100 es001 es000 selects count clock (setting valid edge of ti000 is prohibited) 00: falling edge detection 01: rising edge detection 10: setting prohibited 11: both edges detection (setting when crc001 = 1 is prohibited) 00: falling edge detection 01: rising edge detection 10: setting prohibited 11: both edges detection 0 0/1 0/1 chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 215 figure 6-51. example of register setti ngs for pulse width measurement (2/2) (e) 16-bit timer counter 00 (tm00) by reading tm00, the count value can be read. (f) 16-bit capture/compare register 000 (cr000) this register is used as a capture register. either th e ti000 or ti010 pin is selected as a capture trigger. when a specified edge of t he capture trigger is detec ted, the count value of tm00 is stored in cr000. (g) 16-bit capture/compare register 010 (cr010) this register is used as a capture register. the signal input to the ti 000 pin is used as a capture trigger. when the capture trigger is detected, the count value of tm00 is stored in cr010. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 216 figure 6-52. example of software proce ssing for pulse width measurement (1/2) (a) example of free-running timer mode ffffh tm00 register 0000h operable bits (tmc003, tmc002) capture trigger input (ti000) capture register (cr010) capture interrupt (inttm010) capture trigger input (ti010) capture register (cr000) capture interrupt (inttm000) 01 d 00 d 00 d 01 d 01 d 02 d 02 d 03 d 03 d 04 d 04 d 10 d 10 d 11 d 11 d 12 d 12 d 13 d 13 00 00 0000h 0000h <1> <2> <2> <2> <2> <2> <2> <2> <2> <2> <3> (b) example of clear & start mode entered by ti000 pin valid edge ffffh tm00 register 0000h operable bits (tmc003, tmc002) capture & count clear input (ti000) capture register (cr000) capture interrupt (inttm000) capture register (cr010) capture interrupt (inttm010) 10 d 0 l d 0 d 1 d 1 d 2 d 2 d 3 d 3 d 4 d 4 d 5 d 5 d 6 d 6 d 7 d 7 d 8 d 8 00 00 0000h 0000h <1> <2> <2> <2> <2> <2> <2> <2> <2> <3> <2> chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 217 figure 6-52. example of software proce ssing for pulse width measurement (2/2) <2> capture trigger input flow edge detection of ti000, ti010 pins calculated pulse width from capture value stores count value to cr000, cr010 registers generates capture interrupt note tmc003, tmc002 bits = 01 or 10 register initial setting prm00 register, crc00 register, port setting initial setting of these registers is performed before setting the tmc003 and tmc002 bits. starts count operation start <1> count operation start flow tmc003, tmc002 bits = 00 the counter is initialized and counting is stopped by clearing the tmc003 and tmc002 bits to 00. stop <3> count operation stop flow note the capture interrupt signal (in ttm000) is not generated when the reve rse-phase edge of the ti000 pin input is selected to the valid edge of cr000. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 218 6.5 special use of tm00 6.5.1 rewriting cr010 during tm00 operation in principle, rewriting cr000 and cr01 0 of the 78k0/kc2 when they are used as compare registers is prohibited while tm00 is operating (tmc003 and tmc002 = other than 00). however, the value of cr010 can be changed, even while tm00 is operating, using the following procedure if cr010 is used for ppg output and the duty factor is change d. (when changing the value of cr010 to a smaller value than the current one, rewrite it immediately after its value matches the va lue of tm00. when changing the value of cr010 to a larger value than the current one, rewrite it i mmediately after the values of cr000 and tm00 match. if the value of cr010 is rewritten immediately before a ma tch between cr010 and tm00, or between cr000 and tm00, an unexpected operation may be performed.). procedure for changing value of cr010 <1> disable interrupt inttm010 (tmmk010 = 1). <2> disable reversal of the timer output when th e value of tm00 matches that of cr010 (toc004 = 0). <3> change the value of cr010. <4> wait for one cycle of the count clock of tm00. <5> enable reversal of the timer output when the value of tm00 matches that of cr010 (toc004 = 1). <6> clear the interrupt flag of inttm010 (tmif010 = 0) to 0. <7> enable interrupt inttm010 (tmmk010 = 0). remark for tmif010 and tmmk010, see chapter 18 interrupt functions . 6.5.2 setting lvs00 and lvr00 (1) usage of lvs00 and lvr00 lvs00 and lvr00 are used to set the default value of to 00 output and to invert the timer output without enabling the timer operation (tmc003 and tmc002 = 00). clear lvs 00 and lvr00 to 00 (default value: low-level output) when software control is unnecessary. lvs00 lvr00 timer output status 0 0 not changed (low-level output) 0 1 cleared (low-level output) 1 0 set (high-level output) 1 1 setting prohibited chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 219 (2) setting lvs00 and lvr00 set lvs00 and lvr00 using the following procedure. figure 6-53. example of flow for setting lvs00 and lvr00 bits setting toc00.ospe00, toc004, toc001 bits setting toc00.toe00 bit setting toc00.lvs00, lvr00 bits setting tmc00.tmc003, tmc002 bits <3> enabling timer operation <2> setting of timer output f/f <1> setting of timer output operation caution be sure to set lvs00 and lvr00 follo wing steps <1>, <2>, and <3> above. step <2> can be performed after <1> and before <3>. figure 6-54. timing example of lvr00 and lvs00 toc00.lvs00 bit toc00.lvr00 bit operable bits (tmc003, tmc002) to00 output inttm000 signal <1> 00 <2> <1> <3> <4> <4> <4> 01, 10, or 11 <1> to00 output goes high when lvs00 and lvr00 = 10. <2> to00 output goes low when lvs00 and lvr00 = 01 (the pin output remains unchanged from the high level even if lvs00 and lvr00 are cleared to 00). <3> the timer starts operating when tmc003 and tmc002 are set to 01, 10, or 11. because lvs00 and lvr00 were set to 10 before the operat ion was started, to00 out put starts from the high level. after the timer starts operating, setting lvs00 and lvr00 is prohibited until tmc003 and tmc002 = 00 (disabling the timer operation). <4> the to00 output level is inverted each time an interrupt signal (inttm000) is generated. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 220 6.6 cautions for 16-bit timer/event counter 00 (1) restrictions for each channel of 16-bit timer/event counter 00 table 6-3 shows the restrictions for each channel. table 6-3. restrictions for each ch annel of 16-bit timer/event counter 00 operation restriction as interval timer as square wave output as external event counter ? as clear & start mode entered by ti000 pin valid edge input using timer output (to00) is prohibited when det ection of the valid edge of the ti010 pin is used. (toc00 = 00h) as free-running timer ? as ppg output 0000h cr010 < cr000 ffffh as one-shot pulse output setting the same value to cr000 and cr010 is prohibited. as pulse width measurement using timer output (to00) is prohibited (toc00 = 00h) (2) timer start errors an error of up to one clock may occur in the time requir ed for a match signal to be generated after timer start. this is because counting tm00 is start ed asynchronously to the count pulse. figure 6-55. start timing of tm00 count 0000h timer start 0001h 0002h 0003h 0004h count pulse tm00 count value (3) setting of cr000 and cr010 (clear & start m ode entered upon a match between tm00 and cr000) set a value other than 0000h to cr000 and cr010 (tm00 c annot count one pulse when it is used as an external event counter). chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 221 (4) timing of holding data by capture register (a) when the valid edge is input to t he ti000/ti010 pin and the reverse phase of the ti000 pin is detected while cr000/cr010 is read, cr010 performs a capture operation but the read value of cr000/cr010 is not guaranteed. at this time, an interrupt signal (inttm 000/inttm010) is generated wh en the valid edge of the ti000/ti010 pin is detected (t he interrupt signal is not generated when the reverse-phase edge of the ti000 pin is detected). when the count value is captured because the valid edge of the ti000/ti010 pi n was detected, read the value of cr000/cr010 after inttm000/inttm010 is generated. figure 6-56. timing of holding data by capture register n n + 1 n + 2 x n + 1 m m + 1 m + 2 count pulse tm00 count value edge input inttm010 value captured to cr010 capture read signal capture operation is performed but read value is not guaranteed. capture operation (b) the values of cr000 and cr010 are not guarant eed after 16-bit timer/event counter 00 stops. (5) setting valid edge set the valid edge of the ti000 pin while the timer operation is stopped (tmc003 and tmc002 = 00). set the valid edge by using es000 and es001. (6) re-triggering one-shot pulse make sure that the trigger is not generated while an active level is being output in t he one-shot pulse output mode. be sure to input the next trigger afte r the current active level is output. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 222 (7) operation of ovf00 flag (a) setting ovf00 flag (1) the ovf00 flag is set to 1 in the following case, as well as when tm00 overflows. select the clear & start mode entered upon a match between tm00 and cr000. set cr000 to ffffh. when tm00 matches cr000 and tm00 is cleared from ffffh to 0000h figure 6-57. operation timing of ovf00 flag fffeh ffffh ffffh 0000h 0001h count pulse tm00 inttm000 ovf00 cr000 (b) clearing ovf00 flag even if the ovf00 flag is cleared to 0 after tm00 overflows and before the next count clock is counted (before the value of tm00 becomes 0001h), it is set to 1 again and clearing is invalid. (8) one-shot pulse output one-shot pulse output operates correct ly in the free-running timer mode or the clear & start mode entered by the ti000 pin valid edge. the one-shot pulse cannot be output in the clea r & start mode entered upon a match between tm00 and cr000. chapter 6 16-bit timer/event counter 00 user?s manual u17336ej5v0ud 223 (9) capture operation (a) when valid edge of ti 000 is specified as count clock when the valid edge of ti000 is specified as the count cl ock, the capture register for which ti000 is specified as a trigger does not operate correctly. (b) pulse width to accurately capture value by signals input to ti010 and ti000 pins to accurately capture the count value, the pulse input to the ti000 and ti010 pins as a capture trigger must be wider than two count clocks selected by prm00 (see figure 6-7 ). (c) generation of interrupt signal the capture operation is per formed at the falling edge of the count clock but the in terrupt signals (inttm000 and inttm010) are generated at the risi ng edge of the next count clock (see figure 6-7 ). (d) note when crc001 (bit 1 of capture/compa re control register 00 (crc00)) is set to 1 when the count value of the tm00 regist er is captured to the cr000 regi ster in the phase reverse to the signal input to the ti000 pin, the interrupt signal (i nttm000) is not generated after the count value is captured. if the valid edge is det ected on the ti010 pin during this oper ation, the captur e operation is not performed but the inttm000 signal is generated as an ex ternal interrupt signal. mask the inttm000 signal when the external interrupt is not used. (10) edge detection (a) specifying valid edge after reset if the operation of the 16-bit timer/ev ent counter 00 is enabled after reset and while the ti000 or ti010 pin is at high level and when the rising edge or both the edges are specified as the valid edge of the ti000 or ti010 pin, then the high level of the ti000 or ti010 pin is detected as the rising edge. note this when the ti000 or ti010 pin is pulled up. however, t he rising edge is not detected when the operation is once stopped and then enabled again. (b) sampling clock for eliminating noise the sampling clock for eliminating noise differs depend ing on whether the valid edge of ti000 is used as the count clock or capture trigger. in the fo rmer case, the sampling clock is fixed to f prs . in the latter, the count clock selected by prm00 is used for sampling. when the signal input to the ti000 pin is sampled and the valid level is detected two times in a row, the valid edge is detected. therefore, noise having a short pulse width can be eliminated (see figure 6-7 ). (11) timer operation the signal input to the ti000/ti010 pin is not acknow ledged while the timer is stopped, regardless of the operation mode of the cpu. remark f prs : peripheral hardware clock frequency user?s manual u17336ej5v0ud 224 chapter 7 8-bit timer/even t counters 50 and 51 7.1 functions of 8-bit ti mer/event counters 50 and 51 8-bit timer/event counters 50 and 51 have the following functions. ? interval timer ? external event counter ? square-wave output ? pwm output 7.2 configuration of 8-bit timer/event counters 50 and 51 8-bit timer/event counters 50 and 51 include the following hardware. table 7-1. configuration of 8-bit timer/event counters 50 and 51 item configuration timer register 8-bit timer counter 5n (tm5n) register 8-bit timer compare register 5n (cr5n) timer input ti5n timer output to5n control registers timer clock selection register 5n (tcl5n) 8-bit timer mode control register 5n (tmc5n) port mode register 1 (pm1) or port mode register 3 (pm3) port register 1 (p1) or port register 3 (p3) figures 7-1 and 7-2 show the block diagrams of 8-bit timer/event counters 50 and 51. chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 225 figure 7-1. block diagram of 8-bit timer/event counter 50 internal bus 8-bit timer compare register 50 (cr50) ti50/to50/p17 f prs /2 13 f prs f prs /2 match mask circuit ovf 3 clear tcl502 tcl501 tcl500 timer clock selection register 50 (tcl50) internal bus tce50 tmc506 lvs50 lvr50 tmc501 toe50 invert level 8-bit timer mode control register 50 (tmc50) s r s q r inv selector to tmh0 to uart0 to uart6 inttm50 to50 output to50/ti50/ p17 note 1 note 2 selector 8-bit timer counter 50 (tm50) selector output latch (p17) pm17 f prs /2 2 f prs /2 8 f prs /2 6 figure 7-2. block diagram of 8-bit timer/event counter 51 internal bus 8-bit timer compare register 51 (cr51) ti51/to51/ p33/intp4 f prs /2 12 f prs f prs /2 match mask circuit ovf 3 clear tcl512 tcl511 tcl510 timer clock selection register 51 (tcl51) internal bus tce51 tmc516 lvs51 lvr51 tmc511 toe51 invert level 8-bit timer mode control register 51 (tmc51) s r s q r inv selector inttm51 to51 output to51/ti51/ p33/intp4 note 1 note 2 selector 8-bit timer counter 51 (tm51) selector output latch (p33) pm33 f prs /2 6 f prs /2 4 f prs /2 8 notes 1. timer output f/f 2. pwm output f/f chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 226 (1) 8-bit timer counter 5n (tm5n) tm5n is an 8-bit register that count s the count pulses and is read-only. the counter is incremented in synchronization with the rising edge of the count clock. figure 7-3. format of 8-bit timer counter 5n (tm5n) symbol tm5n (n = 0, 1) address: ff16h (tm50), ff1fh (tm51) after reset: 00h r in the following situations, the count value is cleared to 00h. <1> reset signal generation <2> when tce5n is cleared <3> when tm5n and cr5n match in the mode in which clear & start occurs upon a match of the tm5n and cr5n. (2) 8-bit timer compare register 5n (cr5n) cr5n can be read and written by an 8-bi t memory manipulation instruction. except in pwm mode, the value set in cr5n is constantly compared with the 8-bit timer counter 5n (tm5n) count value, and an interrupt request (in ttm5n) is generated if they match. in the pwm mode, to5n output becomes inactive when the values of tm5n and cr5n ma tch, but no interrupt is generated. the value of cr5n can be set within 00h to ffh. reset signal generation clears cr5n to 00h. figure 7-4. format of 8-bit time r compare register 5n (cr5n) symbol cr5n (n = 0, 1) address: ff17h (cr50), ff41h (cr51) after reset: 00h r/w cautions 1. in the mode in which clear & start oc curs on a match of tm5n and cr5n (tmc5n6 = 0), do not write other values to cr5n during operation. 2. in pwm mode, make the cr5n rewrite peri od 3 count clocks of the count clock (clock selected by tcl5n) or more. remark n = 0, 1 chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 227 7.3 registers controlling 8-bit ti mer/event counters 50 and 51 the following four registers are used to co ntrol 8-bit timer/event counters 50 and 51. ? timer clock selection register 5n (tcl5n) ? 8-bit timer mode control register 5n (tmc5n) ? port mode register 1 (pm1) or port mode register 3 (pm3) ? port register 1 (p1) or port register 3 (p3) (1) timer clock selecti on register 5n (tcl5n) this register sets the count clock of 8-bit timer/ev ent counter 5n and the valid edge of the ti5n pin input. tcl5n can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation clears tcl5n to 00h. remark n = 0, 1 figure 7-5. format of timer clo ck selection register 50 (tcl50) address: ff6ah after reset: 00h r/w symbol 7 6 5 4 3 2 1 0 tcl50 0 0 0 0 0 tcl502 tcl501 tcl500 count clock selection note 1 tcl502 tcl501 tcl500 f prs = 2 mhz f prs = 5 mhz f prs = 10 mhz f prs = 20 mhz 0 0 0 ti50 pin falling edge 0 0 1 ti50 pin rising edge 0 1 0 f prs note 2 2 mhz 5 mhz 10 mhz 20 mhz 0 1 1 f prs /2 1 mhz 2.5 mhz 5 mhz 10 mhz 1 0 0 f prs /2 2 500 khz 1.25 mhz 2.5 mhz 5 mhz 1 0 1 f prs /2 6 31.25 khz 78.13 khz 156.25 khz 312.5 khz 1 1 0 f prs /2 8 7.81 khz 19.53 khz 39.06 khz 78.13 khz 1 1 1 f prs /2 13 0.24 khz 0.61 khz 1.22 khz 2.44 khz notes 1. if the peripheral hardware clock (f prs ) operates on the high-speed system clock (f xh ) (xsel = 1), the f prs operating frequency varies depending on the supply voltage. ? v dd = 4.0 to 5.5 v: f prs 20 mhz ? v dd = 2.7 to 4.0 v: f prs 10 mhz ? v dd = 1.8 to 2.7 v: f prs 5 mhz (standard and (a) grade products only) 2. if the peripheral hardware clock (f prs ) operates on the internal high-speed oscillation clock (f rh ) (xsel = 0), when 1.8 v v dd < 2.7 v, the setting of tcl502, tcl501, tcl500 = 0, 1, 0 (count clock: f prs ) is prohibited. cautions 1. when rewriting tcl50 to othe r data, stop the timer operation beforehand. 2. be sure to clear bits 3 to 7 to ?0?. remark f prs : peripheral hardware clock frequency chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 228 figure 7-6. format of timer clo ck selection register 51 (tcl51) address: ff8ch after reset: 00h r/w symbol 7 6 5 4 3 2 1 0 tcl51 0 0 0 0 0 tcl512 tcl511 tcl510 count clock selection note 1 tcl512 tcl511 tcl510 f prs = 2 mhz f prs = 5 mhz f prs = 10 mhz f prs = 20 mhz 0 0 0 ti51 pin falling edge 0 0 1 ti51 pin rising edge 0 1 0 f prs note 2 2 mhz 5 mhz 10 mhz 20 mhz 0 1 1 f prs /2 1 mhz 2.5 mhz 5 mhz 10 mhz 1 0 0 f prs /2 4 125 khz 312.5 khz 625 khz 1.25 mhz 1 0 1 f prs /2 6 31.25 khz 78.13 khz 156.25 khz 312.5 khz 1 1 0 f prs /2 8 7.81 khz 19.53 khz 39.06 khz 78.13 khz 1 1 1 f prs /2 12 0.49 khz 1.22 khz 2.44 khz 4.88 khz notes 1. if the peripheral hardware clock (f prs ) operates on the high-speed system clock (f xh ) (xsel = 1), the f prs operating frequency varies depending on the supply voltage. ? v dd = 4.0 to 5.5 v: f prs 20 mhz ? v dd = 2.7 to 4.0 v: f prs 10 mhz ? v dd = 1.8 to 2.7 v: f prs 5 mhz (standard and (a) grade products only) 2. if the peripheral hardware clock (f prs ) operates on the internal high-speed oscillation clock (f rh ) (xsel = 0), when 1.8 v v dd < 2.7 v, the setting of tcl512, tcl511, tcl510 = 0, 1, 0 (count clock: f prs ) is prohibited. cautions 1. when rewriting tcl51 to othe r data, stop the timer operation beforehand. 2. be sure to clear bits 3 to 7 to ?0?. remark f prs : peripheral hardware clock frequency chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 229 (2) 8-bit timer mode control register 5n (tmc5n) tmc5n is a register that performs the following five types of settings. <1> 8-bit timer counter 5n (tm5n) count operation control <2> 8-bit timer counter 5n (tm5n) operating mode selection <3> timer output f/f (flip flop) status setting <4> active level selection in timer f/f control or pwm (free-running) mode. <5> timer output control tmc5n can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation clears this register to 00h. remark n = 0, 1 figure 7-7. format of 8-bit timer mode control register 50 (tmc50) address: ff6bh after reset: 00h r/w note symbol <7> 6 5 4 <3> <2> 1 <0> tmc50 tce50 tmc506 0 0 lvs50 lvr50 tmc501 toe50 tce50 tm50 count operation control 0 after clearing to 0, count operation disabled (counter stopped) 1 count operation start tmc506 tm50 operating mode selection 0 mode in which clear & start occurs on a match between tm50 and cr50 1 pwm (free-running) mode lvs50 lvr50 timer output f/f status setting 0 0 no change 0 1 timer output f/f clear (0) (default value of to50 output: low level) 1 0 timer output f/f set (1) (defaul t value of to50 output: high level) 1 1 setting prohibited in other modes (tmc506 = 0) in pwm mode (tmc506 = 1) tmc501 timer f/f control active level selection 0 inversion operation disabled active-high 1 inversion operation enabled active-low toe50 timer output control 0 output disabled (to50 output is low level) 1 output enabled note bits 2 and 3 are write-only. ( cautions and remarks are listed on the next page.) chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 230 figure 7-8. format of 8-bit timer mode control register 51 (tmc51) address: ff43h after reset: 00h r/w note symbol <7> 6 5 4 <3> <2> 1 <0> tmc51 tce51 tmc516 0 0 lvs51 lvr51 tmc511 toe51 tce51 tm51 count operation control 0 after clearing to 0, count operation disabled (counter stopped) 1 count operation start tmc516 tm51 operating mode selection 0 mode in which clear & start occurs on a match between tm51 and cr51 1 pwm (free-running) mode lvs51 lvr51 timer output f/f status setting 0 0 no change 0 1 timer output f/f clear (0) (default value of to51 output: low level) 1 0 timer output f/f set (1) (defaul t value of to51 output: high level) 1 1 setting prohibited in other modes (tmc516 = 0) in pwm mode (tmc516 = 1) tmc511 timer f/f control active level selection 0 inversion operation disabled active-high 1 inversion operation enabled active-low toe51 timer output control 0 output disabled (to51 output is low level) 1 output enabled note bits 2 and 3 are write-only. cautions 1. the settings of lvs5n and lv r5n are valid in other than pwm mode. 2. perform <1> to <4> below in the following order, not at the same time. <1> set tmc5n1, tmc5n6 : operation mode setting <2> set toe5n to enable output: timer output enable <3> set lvs5n, lvr5n (see caution 1): timer f/f setting <4> set tce5n 3. when tce5n = 1, setting the ot her bits of tmc5n is prohibited. 4. the actual to50/ti50/p17 and to51/ti51/p33 /intp4 pin outputs are determined depending on pm17 and p17, and pm33 and p33, besides to5n output. remarks 1. in pwm mode, pwm output is made inactive by clearing tce5n to 0. 2. if lvs5n and lvr5n are read, the value is 0. 3. the values of the tmc5n6, l vs5n, lvr5n, tmc5n1, and toe5n bi ts are reflected in to5n output regardless of the value of tce5n. 4. n = 0, 1 chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 231 (3) port mode registers 1 and 3 (pm1, pm3) these registers set port 1 and 3 input/output in 1-bit units. when using the p17/to50/ti50 and p 33/to51/ti51/intp4 pins for timer output, clear pm17 and pm33 and the output latches of p17 and p33 to 0. when using the p17/to50/ti50 and p33/ to51/ti51/intp4 pins for timer input, set pm17 and pm33 to 1. the output latches of p17 and p33 at this time may be 0 or 1. pm1 and pm3 can be set by a 1-bit or 8- bit memory manipulation instruction. reset signal generation sets these registers to ffh. figure 7-9. format of port mode register 1 (pm1) address: ff21h after reset: ffh r/w symbol 7 6 5 4 3 2 1 0 pm1 pm17 pm16 pm15 pm14 pm13 pm12 pm11 pm10 pm1n p1n pin i/o mode selection (n = 0 to 7) 0 output mode (output buffer on) 1 input mode (output buffer off) figure 7-10. format of port mode register 3 (pm3) address: ff23h after reset: ffh r/w symbol 7 6 5 4 3 2 1 0 pm3 1 1 1 1 pm33 pm32 pm31 pm30 pm3n p3n pin i/o mode selection (n = 0 to 3) 0 output mode (output buffer on) 1 input mode (output buffer off) chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 232 7.4 operations of 8-bit timer/event counters 50 and 51 7.4.1 operation as interval timer 8-bit timer/event counter 5n operates as an interval time r that generates interrupt req uests repeatedly at intervals of the count value preset to 8-bi t timer compare register 5n (cr5n). when the count value of 8-bit timer counter 5n (tm5n) ma tches the value set to cr5n, counting continues with the tm5n value cleared to 0 and an interrupt request signal (inttm5n) is generated. the count clock of tm5n can be selected with bits 0 to 2 (tcl5n0 to tcl5n2) of timer clock selection register 5n (tcl5n). setting <1> set the registers. ? tcl5n: select the count clock. ? cr5n: compare value ? tmc5n: stop the count operation, se lect the mode in which clear & start occurs on a match of tm5n and cr5n. (tmc5n = 0000 0b = don?t care) <2> after tce5n = 1 is set, the count operation starts. <3> if the values of tm5n and cr5n match, intt m5n is generated (tm5n is cleared to 00h). <4> inttm5n is generated repeatedly at the same interval. set tce5n to 0 to stop the count operation. caution do not write other values to cr5n during operation. remarks 1. for how to enable the inttm5n signal interrupt, see chapter 18 interrupt functions . 2. n = 0, 1 figure 7-11. interval ti mer operation timing (1/2) (a) basic operation t count clock tm5n count value cr5n tce5n inttm5n count start clear clear 00h 01h n 00h 01h n 00h 01h n n n n n interrupt acknowledged interrupt acknowledged interval time interval time remark interval time = (n + 1) t n = 01h to ffh n = 0, 1 chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 233 figure 7-11. interval ti mer operation timing (2/2) (b) when cr5n = 00h t interval time count clock tm5n cr5n tce5n inttm5n 00h 00h 00h 00h 00h (c) when cr5n = ffh t count clock tm5n cr5n tce5n inttm5n 01h feh ffh 00h feh ffh 00h ffh ffh ffh interval time interrupt acknowledged interrupt acknowledged remark n = 0, 1 chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 234 7.4.2 operation as external event counter the external event counter c ounts the number of external clock pulses to be input to the ti5n pin by 8-bit timer counter 5n (tm5n). tm5n is incremented each time the valid edge specified by timer clock selection regist er 5n (tcl5n) is input. either the rising or falling edge can be selected. when the tm5n count value matches the value of 8-bit ti mer compare register 5n (cr5n), tm5n is cleared to 0 and an interrupt request signal (inttm5n) is generated. whenever the tm5n value matches the va lue of cr5n, inttm5n is generated. setting <1> set each register. ? set the port mode register (pm17 or pm33) note to 1. ? tcl5n: select ti5n pin input edge. ti5n pin falling edge tcl5n = 00h ti5n pin rising edge tcl5n = 01h ? cr5n: compare value ? tmc5n: stop the count operation, select the mode in which clear & start occurs on match of tm5n and cr5n, disable the timer f/f inversion operation, disable timer output. (tmc5n = 00000000b) <2> when tce5n = 1 is set, the number of pu lses input from the ti5n pin is counted. <3> when the values of tm5n and cr5n match, inttm5n is generated (tm5n is cleared to 00h). <4> after these settings, inttm5n is generated each time the values of tm5n and cr5n match. note 8-bit timer/event counter 50: pm17 8-bit timer/event counter 51: pm33 remark for how to enable the inttm5n signal interrupt, see chapter 18 interrupt functions . figure 7-12. external event counter oper ation timing (with rising edge specified) ti5n tm5n count value cr5n inttm5n 00h 01h 02h 03h 04h 05h n ? 1 n 00h 01h 02h 03h n count start remark n = 00h to ffh n = 0, 1 chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 235 7.4.3 square-wave output operation a square wave with any selected frequency is output at in tervals determined by the value preset to 8-bit timer compare register 5n (cr5n). the to5n output status is in verted at intervals determined by the count value preset to cr5n by setting bit 0 (toe5n) of 8-bit timer mode control r egister 5n (tmc5n) to 1. this enables a square wave with any selected frequency to be output (duty = 50%). setting <1> set each register. ? clear the port output latch (p17 or p33) note and port mode register (pm17 or pm33) note to 0. ? tcl5n: select the count clock. ? cr5n: compare value ? tmc5n: stop the count operat ion, select the mode in which clear & start occurs on a match of tm5n and cr5n. lvs5n lvr5n timer output f/f status setting 0 1 timer output f/f clear (0) (default value of to5n output: low level) 1 0 timer output f/f set (1) (defaul t value of to5n output: high level) timer output enabled (tmc5n = 00001011b or 00000111b) <2> after tce5n = 1 is set, the count operation starts. <3> the timer output f/f is inverted by a match of tm5n and cr5n. after inttm5n is generated, tm5n is cleared to 00h. <4> after these settings, the timer output f/f is inverted at the same interval and a square wave is output from to5n. the frequency is as follows. ? frequency = 1/2t (n + 1) (n: 00h to ffh) note 8-bit timer/event counter 50: p17, pm17 8-bit timer/event counter 51: p33, pm33 caution do not write other values to cr5n during operation. remarks 1. for how to enable the inttm5n signal interrupt, see chapter 18 interrupt functions . 2. n = 0, 1 chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 236 figure 7-13. square-wave output operation timing count clock tm5n count value 00h 01h 02h n ? 1n n 00h n ? 1 n 00h 01h 02h cr5n to5n note t count start note the initial value of to5n output c an be set by bits 2 and 3 (lvr5n, lvs5n) of 8-bit timer mode control register 5n (tmc5n). 7.4.4 pwm output operation 8-bit timer/event counter 5n operates as a pwm output when bit 6 (tmc5n6) of 8-bit timer mode control register 5n (tmc5n) is set to 1. the duty pulse determined by the value set to 8-bit time r compare register 5n (cr5n) is output from to5n. set the active level width of the pwm pulse to cr5n; the active level can be selected with bit 1 (tmc5n1) of tmc5n. the count clock can be selected with bits 0 to 2 (tcl5n0 to tcl5n2) of timer clock selection register 5n (tcl5n). pwm output can be enabled/disabled with bit 0 (toe5n) of tmc5n. caution in pwm mode, make the cr5n rewrite period 3 count clocks of the count clock (clock selected by tcl5n) or more. remark n = 0, 1 chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 237 (1) pwm output basic operation setting <1> set each register. ? clear the port output latch (p17 or p33) note and port mode register (pm17 or pm33) note to 0. ? tcl5n: select the count clock. ? cr5n: compare value ? tmc5n: stop the count operation, select pwm mode. the timer output f/f is not changed. tmc5n1 active level selection 0 active-high 1 active-low timer output enabled (tmc5n = 01000001b or 01000011b) <2> the count operation starts when tce5n = 1. clear tce5n to 0 to stop the count operation. note 8-bit timer/event counter 50: p17, pm17 8-bit timer/event counter 51: p33, pm33 pwm output operation <1> pwm output (to5n output) outputs an inactive level until an overflow occurs. <2> when an overflow occurs, the active level is output. the active level is output until cr5n matches the count value of 8-bit timer counter 5n (tm5n). <3> after the cr5n matches the count value, the inacti ve level is output until an overflow occurs again. <4> operations <2> and <3> are repe ated until the count operation stops. <5> when the count operation is stopped with tce5n = 0, pwm output becomes inactive. for details of timing, see figures 7-14 and 7-15 . the cycle, active-level width, and duty are as follows. ? cycle = 2 8 t ? active-level width = nt ? duty = n/2 8 (n = 00h to ffh) remark n = 0, 1 chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 238 figure 7-14. pwm output operation timing (a) basic operation (active level = h) count clock tm5n cr5n tce5n inttm5n to5n 00h 01h ffh 00h 01h 02h n n + 1 ffh 00h 01h 02h m 00h n <2> active level <1> inactive level <3> inactive level <5> inactive level t <2> active level (b) cr5n = 00h count clock tm5n cr5n tce5n inttm5n 01h 00h ffh 00h 01h 02h 00h ffh 00h 01h 02h m 00h to5n l (inactive level) t (c) cr5n = ffh tm5n cr5n tce5n inttm5n to5n 01h 00h ffh 00h 01h 02h ffh <1> inactive level <2> active level ffh 00h 01h 02h m 00h <3> inactive level <2> active level <5> inactive level t remarks 1. <1> to <3> and <5> in figure 7-14 (a) correspond to <1> to <3> and <5> in pwm output operation in 7.4.4 (1) pwm output basic operation . 2. n = 0, 1 chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 239 (2) operation with cr5n changed figure 7-15. timing of operation with cr5n changed (a) cr5n value is changed from n to m before clock rising edge of ffh value is transferred to cr5n at overflow immediately after change. count clock tm5n cr5n tce5n inttm5n to5n <1> cr5n change (n m) n n + 1 n + 2 ffh 00h 01h m m + 1 m + 2 ffh 00h 01h 02h m m + 1 m + 2 n 02h m h <2> t (b) cr5n value is changed from n to m after clock rising edge of ffh value is transferred to cr5n at second overflow. count clock tm5n cr5n tce5n inttm5n to5n n n + 1 n + 2 ffh 00h 01h n n + 1 n + 2 ffh 00h 01h 02h n 02h n h m m m + 1 m + 2 <1> cr5n change (n m) <2> t caution when reading from cr5n betw een <1> and <2> in figure 7-15, the value read differs from the actual value (read value: m, actual value of cr5n: n). chapter 7 8-bit timer/event counters 50 and 51 user?s manual u17336ej5v0ud 240 7.5 cautions for 8-bit ti mer/event counters 50 and 51 (1) timer start error an error of up to one clock may occur in the time requir ed for a match signal to be generated after timer start. this is because 8-bit timer counters 50 and 51 (tm50, tm 51) are started asynchronous ly to the count clock. figure 7-16. 8-bit timer counter 5n start timing count clock tm5n count value 00h 01h 02h 03h 04h timer start remark n = 0, 1 user?s manual u17336ej5v0ud 241 chapter 8 8-bit timers h0 and h1 8.1 functions of 8-bit timers h0 and h1 8-bit timers h0 and h1 have the following functions. ? interval timer ? square-wave output ? pwm output ? carrier generator (8-bit timer h1 only) 8.2 configuration of 8-bit timers h0 and h1 8-bit timers h0 and h1 include the following hardware. table 8-1. configuration of 8-bit timers h0 and h1 item configuration timer register 8-bit timer counter hn registers 8-bit timer h compare register 0n (cmp0n) 8-bit timer h compare register 1n (cmp1n) timer output tohn, output controller control registers 8-bit timer h mode register n (tmhmdn) 8-bit timer h carrier control register 1 (tmcyc1) note port mode register 1 (pm1) port register 1 (p1) note 8-bit timer h1 only remark n = 0, 1 figures 8-1 and 8-2 show the block diagrams. chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 242 chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 243 chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 244 (1) 8-bit timer h compar e register 0n (cmp0n) this register can be read or written by an 8-bit memory mani pulation instruction. this r egister is used in all of the timer operation modes. this register constantly compares t he value set to cmp0n with the count value of 8-bit timer counter hn and, when the two values match, generates an interrupt request signal (inttm hn) and inverts the output level of tohn. rewrite the value of cmp0n while the timer is stopped (tmhen = 0). a reset signal generation clears this register to 00h. figure 8-3. format of 8-bit time r h compare register 0n (cmp0n) symbol cmp0n (n = 0, 1) address: ff18h (cmp00), ff1ah (cmp01) after reset: 00h r/w 7 6 5 4 32 1 0 caution cmp0n cannot be rewritten during timer count operation. cmp0n can be refreshed (the same value is written) during timer count operation. (2) 8-bit timer h compar e register 1n (cmp1n) this register can be read or written by an 8-bit memory manipulation instruction. this register is used in the pwm output mode and carrier generator mode. in the pwm output mode, this register constantly compares the value set to cmp1n with the count value of 8-bit timer counter hn and, when the two values match, inverts the output level of tohn. no interrupt request signal is generated. in the carrier generator mode, the cm p1n register always compares the val ue set to cmp1n with the count value of 8-bit timer counter hn and, when the two values match, generates an interrupt request signal (inttmhn). at the same time, the count value is cleared. cmp1n can be refreshed (the same value is writt en) and rewritten during timer count operation. if the value of cmp1n is rewritten while the timer is oper ating, the new value is la tched and transferred to cmp1n when the count value of the timer matches the old val ue of cmp1n, and then the valu e of cmp1n is changed to the new value. if matching of the count value and the cmp1n value and wr iting a value to cmp1n conflict, the value of cmp1n is not changed. a reset signal generation clears this register to 00h. figure 8-4. format of 8-bit time r h compare register 1n (cmp1n) symbol cmp1n (n = 0, 1) address: ff19h (cmp10), ff1bh (cmp11) after reset: 00h r/w 7 6 5 4 32 1 0 caution in the pwm output mode and carrier genera tor mode, be sure to set cmp1n when starting the timer count operation (tmhen = 1) after the ti mer count operation was stopped (tmhen = 0) (be sure to set again even if se tting the same value to cmp1n). remark n = 0, 1 chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 245 8.3 registers controlling 8-bit timers h0 and h1 the following four registers are used to control 8-bit timers h0 and h1. ? 8-bit timer h mode register n (tmhmdn) ? 8-bit timer h carrier control register 1 (tmcyc1) note ? port mode register 1 (pm1) ? port register 1 (p1) note 8-bit timer h1 only (1) 8-bit timer h mode register n (tmhmdn) this register controls the mode of timer h. this register can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation clears this register to 00h. remark n = 0, 1 chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 246 figure 8-5. format of 8-bit timer h mode register 0 (tmhmd0) tmhe0 stops timer count operation (counter is cleared to 0) enables timer count operation (count operation started by inputting clock) tmhe0 0 1 timer operation enable tmhmd0 cks02 cks01 cks00 tmmd01 tmmd00 tolev0 toen0 address: ff69h after reset: 00h r/w symbol f prs note 2 f prs /2 f prs /2 2 f prs /2 6 f prs /2 10 tm50 output note 3 setting prohibited cks02 0 0 0 0 1 1 cks01 0 0 1 1 0 0 cks00 0 1 0 1 0 1 f prs = 2 mhz 2 mhz 1 mhz 500 khz 31.25 khz 1.95 khz count clock selection note 1 other than above interval timer mode pwm output mode setting prohibited tmmd01 0 1 tmmd00 0 0 timer operation mode low level high level tolev0 0 1 timer output level control (in default mode) disables output enables output toen0 0 1 timer output control other than above <7> 6 5 4 3 2 <1> <0> f prs = 5 mhz 5 mhz 2.5 mhz 1.25 mhz 78.13 khz 4.88 khz f prs = 10 mhz 10 mhz 5 mhz 2.5 mhz 156.25 khz 9.77 khz f prs = 20 mhz 20 mhz 10 mhz 5 mhz 312.5 khz 19.54 khz notes 1. if the peripheral hardware clock (f prs ) operates on the high-speed system clock (f xh ) (xsel = 1), the f prs operating frequency varies depending on the supply voltage. ? v dd = 4.0 to 5.5 v: f prs 20 mhz ? v dd = 2.7 to 4.0 v: f prs 10 mhz ? v dd = 1.8 to 2.7 v: f prs 5 mhz (standard and (a) grade products only) 2. if the peripheral hardware clock (f prs ) operates on the internal hi gh-speed oscillation clock (f rh ) (xsel = 0), when 1.8 v v dd < 2.7 v, the setting of cks02 = cks01 = cks00 = 0 (count clock: f prs ) is prohibited. chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 247 note 3. note the following points when select ing the tm50 output as the count clock. ? mode in which the count clock is cleared and started upon a match of tm50 and cr50 (tmc506 = 0) start the operation of 8-bit timer/event counter 50 first and then enable the timer f/f inversion operation (tmc501 = 1). ? pwm mode (tmc506 = 1) start the operation of 8-bit timer/event counter 50 fi rst and then set the count clock to make the duty = 50%. it is not necessary to enable (toe50 = 1) to50 output in any mode. cautions 1. when tmhe0 = 1, setting the other bits of tmhmd0 is prohibited. however, tmhmd0 can be refreshed (the same va lue is written). 2. in the pwm output mode, be sure to set 8-bit timer h compare re gister 10 (cmp10) when starting the timer count operation (tmhe0 = 1) after the timer count operation was stopped (tmhe0 = 0) (be sure to set again even if setting the same value to cmp10). 3. the actual toh0/p15 pin output is determine d depending on pm15 and p15, besides toh0 output. remarks 1. f prs : peripheral hardware clock frequency 2. tmc506: bit 6 of 8-bit timer mode control register 50 (tmc50) tmc501: bit 1 of tmc50 chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 248 figure 8-6. format of 8-bit timer h mode register 1 (tmhmd1) tmhe1 stops timer count operation (counter is cleared to 0) enables timer count operation (count operation started by inputting clock) tmhe1 0 1 timer operation enable tmhmd1 cks12 cks11 cks10 tmmd11 tmmd10 tolev1 toen1 address: ff6ch after reset: 00h r/w symbol interval timer mode carrier generator mode pwm output mode setting prohibited tmmd11 0 0 1 1 tmmd10 0 1 0 1 timer operation mode low level high level tolev1 0 1 timer output level control (in default mode) disables output enables output toen1 0 1 timer output control <7> 6 5 4 3 2 <1> <0> f prs note 2 f prs /2 2 f prs /2 4 f prs /2 6 f prs /2 12 f rl /2 7 f rl /2 9 f rl cks12 0 0 0 0 1 1 1 1 cks11 0 0 1 1 0 0 1 1 cks10 0 1 0 1 0 1 0 1 f prs = 2 mhz 2 mhz 500 khz 125 khz 31.25 khz 0.49 khz 1.88 khz (typ.) 0.47 khz (typ.) 240 khz (typ.) count clock selection note 1 f prs = 5 mhz 5 mhz 1.25 mhz 312.5 khz 78.13 khz 1.22 khz f prs = 10 mhz 10 mhz 2.5 mhz 625 khz 156.25 khz 2.44 khz f prs = 20 mhz 20 mhz 5 mhz 1.25 mhz 312.5 khz 4.88 khz notes 1. if the peripheral hardware clock (f prs ) operates on the high-speed system clock (f xh ) (xsel = 1), the f prs operating frequency varies depending on the supply voltage. ? v dd = 4.0 to 5.5 v: f prs 20 mhz ? v dd = 2.7 to 4.0 v: f prs 10 mhz ? v dd = 1.8 to 2.7 v: f prs 5 mhz (standard and (a) grade products only) 2. if the peripheral hardware clock (f prs ) operates on the internal hi gh-speed oscillation clock (f rh ) (xsel = 0), when 1.8 v v dd < 2.7 v, the setting of cks12 = cks11 = cks10 = 0 (count clock: f prs ) is prohibited. chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 249 cautions 1. when tmhe1 = 1, setting the other bits of tmhmd1 is prohibited. however, tmhmd1 can be refreshed (the same va lue is written). 2. in the pwm output mode and carrier generato r mode, be sure to set the 8-bit timer h compare register 11 (cmp11) when star ting the timer count operation (tmh e1 = 1) after the timer count operation was stopped (tmhe1 = 0) (be sure to set again even if setting the same value to cmp11). 3. when the carrier generator mode is used, set so that the count clock frequency of tmh1 becomes more than 6 times the count clock frequency of tm51. 4. the actual toh1/intp5/p16 pin output is determined depending on pm16 and p16, besides toh1 output. remarks 1. f prs : peripheral hardware clock frequency 2. f rl : internal low-speed oscillation clock frequency (2) 8-bit timer h carrier control register 1 (tmcyc1) this register controls the remote control output and carrier pulse output status of 8-bit timer h1. this register can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation clears this register to 00h. figure 8-7. format of 8-bit timer h carrier control register 1 (tmcyc1) 0 tmcyc1 0 0 0 0 rmc1 nrzb1 nrz1 address: ff6dh after reset: 00h r/w note symbol low-level output high-level output at rising edge of inttm51 signal input low-level output carrier pulse output at rising edge of inttm51 signal input rmc1 0 0 1 1 nrzb1 0 1 0 1 remote control output carrier output disabled status (low-level status) carrier output enabled status (rmc1 = 1: carrier pulse output, rmc1 = 0: high-level status) nrz1 0 1 carrier pulse output status flag <0> note bit 0 is read-only. caution do not rewrite rmc1 when tmhe = 1. ho wever, tmcyc1 can be refreshed (the same value is written). chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 250 (3) port mode register 1 (pm1) this register sets port 1 input/output in 1-bit units. when using the p15/toh0 and p16/toh1/intp5 pins for timer output, clear pm15 and pm16 and the output latches of p15 and p16 to 0. pm1 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to ffh. figure 8-8. format of port mode register 1 (pm1) address: ff21h after reset: ffh r/w symbol 7 6 5 4 3 2 1 0 pm1 pm17 pm16 pm15 pm14 pm13 pm12 pm11 pm10 pm1n p1n pin i/o mode selection (n = 0 to 7) 0 output mode (output buffer on) 1 input mode (output buffer off) chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 251 8.4 operation of 8-bit timers h0 and h1 8.4.1 operation as inter val timer/square-wave output when 8-bit timer counter hn and compare register 0n (cmp0n) match, an interrupt request signal (inttmhn) is generated and 8-bit timer counter hn is cleared to 00h. compare register 1n (cmp1n) is not used in interval time r mode. since a match of 8-bit timer counter hn and the cmp1n register is not detected even if the cmp1n register is set, timer output is not affected. by setting bit 0 (toenn) of timer h mode register n (tmh mdn) to 1, a square wave of any frequency (duty = 50%) is output from tohn. setting <1> set each register. figure 8-9. register setting during inte rval timer/square-wave output operation (i) setting timer h mode register n (tmhmdn) 0 0/1 0/1 0/1 0 0 0/1 0/1 tmmdn0 tolevn toenn cksn1 cksn2 tmhen tmhmdn cksn0 tmmdn1 timer output setting default setting of timer output level interval timer mode setting count clock (f cnt ) selection count operation stopped (ii) cmp0n register setting the interval time is as follows if n is set as a comparison value. ? interval time = (n +1) / f cnt <2> count operation starts when tmhen = 1. <3> when the values of 8-bit timer counter hn and the cmp0n register match, t he inttmhn signal is generated and 8-bit timer counter hn is cleared to 00h. <4> subsequently, the inttmhn signal is generated at t he same interval. to stop the count operation, clear tmhen to 0. remarks 1. for the setting of the output pin, see 8.3 (3) port mode register 1 (pm1) . 2. for how to enable the inttmhn signal interrupt, see chapter 18 interrupt functions . 3. n = 0, 1 chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 252 figure 8-10. timing of interval time r/square-wave output operation (1/2) (a) basic operation (operation when 01h cmp0n feh) 00h count clock count start 8-bit timer counter hn cmp0n tmhen inttmhn tohn 01h n clear interval time clear n 00h 01h n 00h 01h 00h <2> level inversion, match interrupt occurrence, 8-bit timer counter hn clear <2> level inversion, match interrupt occurrence, 8-bit timer counter hn clear <3> <1> <1> the count operation is enabled by setting the tmhen bi t to 1. the count clock starts counting no more than 1 clock after the operation is enabled. <2> when the value of the 8-bit timer counter hn matches the value of the cmp0n regist er, the value of the timer counter is cleared, and the level of th e tohn output is inverted. in addition, the inttmhn signal is output at the rising edge of the count clock. <3> if the tmhen bit is cleared to 0 while timer h is oper ating, the inttmhn signal and tohn output are set to the default level. if they are already at the default level before the tmhen bit is cleared to 0, then that level is maintained. remark n = 0, 1 01h n feh chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 253 figure 8-10. timing of interval time r/square-wave output operation (2/2) (b) operation when cmp0n = ffh 00h count clock count start 8-bit timer counter hn cmp0n tmhen inttmhn tohn 01h feh clear clear ffh 00h feh ffh 00h ffh interval time (c) operation when cmp0n = 00h 00h 00h count clock count start 8-bit timer counter hn cmp0n tmhen inttmhn tohn interval time remark n = 0, 1 chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 254 8.4.2 operation as pwm output in pwm output mode, a pulse with an arbi trary duty and arbitrary cycle can be output. 8-bit timer compare register 0n (cmp0n) controls the cycle of timer output (tohn). re writing the cmp0n register during timer operation is prohibited. 8-bit timer compare register 1n (cmp1n) controls the dut y of timer output (tohn). re writing the cmp1n register during timer operation is possible. the operation in pwm output mode is as follows. pwm output (tohn output) output s an active level and 8-bit timer counter hn is cleared to 0 when 8-bit timer counter hn and the cmp0n register match after the timer count is started. pwm out put (tohn output) outputs an inactive level when 8-bit timer counter hn and the cmp1n register match. setting <1> set each register. figure 8-11. register setting in pwm output mode (i) setting timer h mode register n (tmhmdn) 0 0/1 0/1 0/1 1 0 0/1 1 tmmdn0 tolevn toenn cksn1 cksn2 tmhen tmhmdn cksn0 tmmdn1 timer output enabled default setting of timer output level pwm output mode selection count clock (f cnt ) selection count operation stopped (ii) setting cmp0n register ? compare value (n): cycle setting (iii) setting cmp1n register ? compare value (m): duty setting remarks 1. n = 0, 1 2. 00h cmp1n (m) < cmp0n (n) ffh <2> the count operation starts when tmhen = 1. <3> the cmp0n register is the compare re gister that is to be compared first after counter operation is enabled. when the values of 8-bit timer counter hn and the cmp0n register match, 8-bit timer counter hn is cleared, an interrupt request signal (inttmhn) is generated, and an active level is output. at the same time, the compare register to be compared with 8-bit timer count er hn is changed from the cmp0n register to the cmp1n register. <4> when 8-bit timer counter hn and the cmp1n register match, an inactive level is output and the compare register to be compared with 8-bit timer counter hn is changed from the cmp1n register to the cmp0n register. at this time, 8-bit timer counter hn is not cleared and the inttmhn signal is not generated. chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 255 <5> by performing procedures <3> and <4> repeatedl y, a pulse with an arbitrary duty can be obtained. <6> to stop the count operation, set tmhen = 0. if the setting value of the cmp0n regist er is n, the setting value of the cmp1n register is m, and the count clock frequency is f cnt , the pwm pulse output cycle and duty are as follows. ? pwm pulse output cycle = (n + 1) / f cnt ? duty = (m + 1) / (n + 1) cautions 1. the set value of the cmp1n register ca n be changed while the time r counter is operating. however, this takes a duration of three operati ng clocks (signal selected by the cksn2 to cksn0 bits of the tmhmdn register) from when the value of the cmp1n register is changed until the value is transferred to the register. 2. be sure to set the cmp1n register when st arting the timer count opera tion (tmhen = 1) after the timer count operation was stopped (tmhen = 0) (be sure to set again even if setting the same value to the cmp1n register). 3. make sure that the cmp1n re gister setting value (m) and cmp0 n register setting value (n) are within the following range. 00h cmp1n (m) < cmp0n (n) ffh remarks 1. for the setting of the output pin, see 8.3 (3) port mode register 1 (pm1) . 2. for details on how to enable the inttmhn signal interrupt, see chapter 18 interrupt functions . 3. n = 0, 1 chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 256 figure 8-12. operation timing in pwm output mode (1/4) (a) basic operation count clock 8-bit timer counter hn cmp0n tmhen inttmhn tohn (tolevn = 0) tohn (tolevn = 1) 00h 01h a5h 00h 01h 02h a5h 00h a5h 00h 01h 02h cmp1n a5h 01h <1> <2> <3> <4> <1> the count operation is enabled by setting the tmhen bit to 1. start 8-bit timer counter hn by masking one count clock to count up. at this time, pwm output outputs an inactive level. <2> when the values of 8-bit timer count er hn and the cmp0n register match, an active level is output. at this time, the value of 8-bit timer counter hn is cleared, and the inttmhn signal is output. <3> when the values of 8-bit timer count er hn and the cmp1n register match, an inactive level is output. at this time, the 8-bit counter value is not cleared and the inttmhn signal is not output. <4> clearing the tmhen bit to 0 during timer hn operat ion sets the inttmhn signal to the default and pwm output to an inactive level. remark n = 0, 1 chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 257 figure 8-12. operation timing in pwm output mode (2/4) (b) operation when cmp0n = ffh, cmp1n = 00h count clock 8-bit timer counter hn cmp0n tmhen inttmhn tohn (tolevn = 0) 00h 01h ffh 00h 01h 02h ffh 00h ffh 00h 01h 02h cmp1n ffh 00h (c) operation when cmp0n = ffh, cmp1n = feh count clock 8-bit timer counter hn cmp0n tmhen inttmhn tohn (tolevn = 0) 00h 01h feh ffh 00h 01h feh ffh 00h 01h feh ffh 00h cmp1n ffh feh remark n = 0, 1 chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 258 figure 8-12. operation timing in pwm output mode (3/4) (d) operation when cmp0n = 01h, cmp1n = 00h count clock 8-bit timer counter hn cmp0n tmhen inttmhn tohn (tolevn = 0) 01h 00h 01h 00h 01h 00h 00h 01h 00h 01h cmp1n 00h remark n = 0, 1 chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 259 figure 8-12. operation timing in pwm output mode (4/4) (e) operation by changi ng cmp1n (cmp1n = 02h 03h, cmp0n = a5h) count clock 8-bit timer counter hn cmp01 tmhe1 inttmh1 toh1 (tolev1 = 0) 00h 01h 02h a5h 00h 01h 02h 03h a5h 00h 01h 02h 03h a5h 00h <1> <4> <3> <2> cmp11 <6> <5> 02h a5h 03h 02h (03h) <2>? 80h <1> the count operation is enabled by setting tmhen = 1. start 8-bit timer counter hn by masking one count clock to count up. at this time, pwm output outputs an inactive level. <2> the cmp1n register value can be changed during timer counter operation. this operation is asynchronous to the count clock. <3> when the values of 8-bit timer count er hn and the cmp0n register match, the value of 8-bit timer counter hn is cleared, an active level is output, and the inttmhn signal is output. <4> if the cmp1n register value is changed, the value is latched and not transferred to the register. when the values of 8-bit timer counter hn and the cmp1n register before the change match, the value is transferred to the cmp1n register and the cmp1n re gister value is changed (<2>?). however, three count clocks or more are required fr om when the cmp1n register value is changed to when the value is transferred to the register. if a match signal is generated within thr ee count clocks, the changed value cannot be transferred to the register. <5> when the values of 8-bit timer counter hn and the cm p1n register after the change match, an inactive level is output. 8-bit timer counter hn is not cl eared and the inttmhn signal is not generated. <6> clearing the tmhen bit to 0 during timer hn operat ion sets the inttmhn signal to the default and pwm output to an inactive level. remark n = 0, 1 chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 260 8.4.3 carrier generator opera tion (8-bit timer h1 only) in the carrier generator mode, 8-bit timer h1 is used to generate the carrier signal of an infrared remote controller, and 8-bit timer/event counter 51 is used to generat e an infrared remote control signal (time count). the carrier clock generated by 8-bit timer h1 is output in the cycle set by 8-bit timer/event counter 51. in carrier generator mode, the output of the 8-bit timer h1 carrier pulse is controlled by 8-bit timer/event counter 51, and the carrier pulse is out put from the toh1 output. (1) carrier generation in carrier generator mode, 8-bit timer h compare regist er 01 (cmp01) generates a low-level width carrier pulse waveform and 8-bit timer h compare register 11 (cmp11) generates a high-level width carrier pulse waveform. rewriting the cmp11 register during t he 8-bit timer h1 operation is possible but rewriting the cm p01 register is prohibited. (2) carrier output control carrier output is controlled by the interrupt request sig nal (inttm51) of 8-bit timer/event counter 51 and the nrzb1 and rmc1 bits of the 8-bit timer h carrier co ntrol register (tmcyc1). the relationship between the outputs is shown below. rmc1 bit nrzb1 bit output 0 0 low-level output 0 1 high-level output at rising edge of inttm51 signal input 1 0 low-level output 1 1 carrier pulse output at rising edge of inttm51 signal input chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 261 to control the carrier pulse output during a count operation, the nrz1 and nrzb1 bits of the tmcyc1 register have a master and slave bit configuratio n. the nrz1 bit is read-only but t he nrzb1 bit can be read and written. the inttm51 signal is synchronized with the 8-bit timer h1 count clock and is output as the inttm5h1 signal. the inttm5h1 signal becomes the data transfer signal of the nrz1 bit, and the nrzb1 bit value is transferred to the nrz1 bit. the timing for transfer from the nrz b1 bit to the nrz1 bit is as shown below. figure 8-13. transfer timing 8-bit timer h1 count clock tmhe1 inttm51 inttm5h1 nrz1 nrzb1 rmc1 1 1 1 0 00 <1> <2> <3> <1> the inttm51 signal is synchronized with the count cl ock of 8-bit timer h1 and is output as the inttm5h1 signal. <2> the value of the nrzb1 bit is tr ansferred to the nrz1 bit at the second clock from the rising edge of the inttm5h1 signal. <3> write the next value to the nrzb1 bit in the inte rrupt servicing program t hat has been started by the inttm5h1 interrupt or after timing has been checked by polling the interrupt request flag. write data to count the next time to the cr51 register. cautions 1. do not rewrite the nrzb1 bit again until at least the second clock afte r it has been rewritten, or else the transfer from the nrzb1 bi t to the nrz1 bit is not guaranteed. 2. when 8-bit timer/event counter 51 is used in the carrier generator mode, an interrupt is generated at the timing of <1>. when 8-bit timer/event counter 51 is used in a mode other than the carrier generator mode, the timi ng of the interrupt generation differs. remark inttm5h1 is an internal signal and not an interrupt source. chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 262 setting <1> set each register. figure 8-14. register setting in carrier generator mode (i) setting 8-bit timer h m ode register 1 (tmhmd1) 0 0/1 0/1 0/1 0 timer output enabled default setting of timer output level carrier generator mode selection count clock (f cnt ) selection count operation stopped 1 0/1 1 tmmd10 tolev1 toen1 cks11 cks12 tmhe1 tmhmd1 cks10 tmmd11 (ii) cmp01 register setting ? compare value (iii) cmp11 register setting ? compare value (iv) tmcyc1 register setting ? rmc1 = 1 ... remote control output enable bit ? nrzb1 = 0/1 ... carrier output enable bit (v) tcl51 and tmc51 register setting ? see 7.3 registers controlling 8-bit timer/event counters 50 and 51 . <2> when tmhe1 = 1, 8-bit timer h1 starts counting. <3> when tce51 of 8-bit timer mode control register 51 (tmc 51) is set to 1, 8-bit timer/event counter 51 starts counting. <4> after the count operation is enabled, the first compar e register to be compared is the cmp01 register. when the count value of 8-bit timer counter h1 and t he cmp01 register value match, the inttmh1 signal is generated, 8-bit timer co unter h1 is cleared. at the same time, the compare register to be compared with 8-bit timer counter h1 is switched from t he cmp01 register to the cmp11 register. <5> when the count value of 8-bit timer counter h1 and the cmp11 register value match, the inttmh1 signal is generated, 8-bit timer co unter h1 is cleared. at the same time, the compare register to be compared with 8-bit timer counter h1 is switched from t he cmp11 register to the cmp01 register. <6> by performing procedures <4> and <5> r epeatedly, a carrier clock is generated. <7> the inttm51 signal is synchronized with count clock of 8-bit timer h1 and output as the inttm5h1 signal. the inttm5h1 signal becomes the data transfer signal for the nrzb1 bit, and the nrzb1 bit value is transferred to the nrz1 bit. <8> write the next value to the nrzb1 bit in the inte rrupt servicing program that has been started by the inttm5h1 interrupt or after timing has been checked by polling the interrupt request flag. write data to count the next time to the cr51 register. <9> when the nrz1 bit is high level, a carrier clock is output by toh1 output. chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 263 <10> by performing the procedures above, an arbitrary carrier clock is obtained. to stop the count operation, clear tmhe1 to 0. if the setting value of the cmp01 regist er is n, the setting value of the cmp11 register is m, and the count clock frequency is f cnt , the carrier clock output cycle and duty are as follows. ? carrier clock output cycle = (n + m + 2) / f cnt ? duty = high-level width/carrier clo ck output width = (m + 1) / (n + m + 2) cautions 1. be sure to set the cmp11 register when starting the timer count operation (tmhe1 = 1) after the timer count operation was stopped (tmh e1 = 0) (be sure to set again even if setting the same value to the cmp11 register). 2. set so that the count clock frequency of tmh1 becomes more th an 6 times the count clock frequency of tm51. 3. set the values of the cmp01 and cmp 11 registers in a range of 01h to ffh. 4. the set value of the cmp11 register can be changed while the timer counter is operating. however, it takes the duration of three operating clocks (signal selected by the cks12 to cks10 bits of the tmhmd1 re gister) since the val ue of the cmp11 register has been changed until the val ue is transferred to the register. 5. be sure to set the rmc1 bit be fore the count operation is started. remarks 1. for the setting of the output pin, see 8.3 (3) port mode register 1 (pm1) . 2. for how to enable the inttmh1 signal interrupt, see chapter 18 interrupt functions . chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 264 figure 8-15. carrier generator mode operation timing (1/3) (a) operation when cmp01 = n, cmp11 = n cmp01 cmp11 tmhe11 inttmh1 carrier clock 00h n 00h n 00h n 00h n 00h n 00h n n n 8-bit timer 51 count clock tm51 count value cr5 1 tce5 1 toh 1 0 0 1 1 0 0 1 1 0 0 inttm5 1 nrzb 1 nrz 1 carrier clock 00h 01h k 00h 01h l 00h 01h m 00h 01h 00h 01h n inttm5h 1 <1><2> <3> <4> <5> <6> <7> 8-bit timer h1 count clock 8-bit timer counter h1 count value k l m n <1> when tmhe1 = 0 and tce51 = 0, 8-bit timer counter h1 operation is stopped. <2> when tmhe1 = 1 is set, 8-bit timer counter h1 starts a count operation. at that time, the carrier clock remains default. <3> when the count value of 8-bit timer counter h1 matc hes the cmp01 register val ue, the first inttmh1 signal is generated, the carrier clock signal is inverted, and the compare register to be compared with 8-bit timer counter h1 is switched from the cmp01 register to the cmp11 register. 8-bit timer counter h1 is cleared to 00h. <4> when the count value of 8-bit timer counter h1 matc hes the cmp11 register value, the inttmh1 signal is generated, the carrier clock signal is inverted, and t he compare register to be compared with 8-bit timer counter h1 is switched from the cmp11 register to the cmp01 register. 8-bit timer counter h1 is cleared to 00h. by performing procedures <3> and <4> repeatedly, a carrier clock with duty fixed to 50% is generated. <5> when the inttm51 signal is generated, it is synchronized with the 8-bit timer h1 count clock and is output as the inttm5h1 signal. <6> the inttm5h1 signal becomes the data transfer si gnal for the nrzb1 bit, and the nrzb1 bit value is transferred to the nrz1 bit. <7> when nrz1 = 0 is set, the toh1 output becomes low level. remark inttm5h1 is an internal signal and not an interrupt source. chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 265 figure 8-15. carrier generator mode operation timing (2/3) (b) operation when cmp01 = n, cmp11 = m n cmp01 cmp11 tmhe1 inttmh1 carrier clock tm51 count value 00h n 00h 01h m 00h n 00h 01h m 00h 00h n m tce51 toh1 0 0 1 1 0 0 1 1 0 0 inttm51 nrzb1 nrz1 carrier clock 00h 01h k 00h 01h l 00h 01h m 00h 01h 00h 01h n inttm5h1 <1><2> <3> <4> <5> <6> <7> 8-bit timer 51 count clock 8-bit timer h1 count clock 8-bit timer counter h1 count value k cr51 l m n <1> when tmhe1 = 0 and tce51 = 0, 8-bit timer counter h1 operation is stopped. <2> when tmhe1 = 1 is set, 8-bit timer counter h1 starts a count operation. at that time, the carrier clock remains default. <3> when the count value of 8-bit timer counter h1 matc hes the cmp01 register val ue, the first inttmh1 signal is generated, the carrier clock signal is inverted, and the compare register to be compared with 8-bit timer counter h1 is switched from the cmp01 register to the cmp11 register. 8-bit timer counter h1 is cleared to 00h. <4> when the count value of 8-bit timer counter h1 matc hes the cmp11 register value, the inttmh1 signal is generated, the carrier clock signal is inverted, and t he compare register to be compared with 8-bit timer counter h1 is switched from the cmp11 register to the cmp01 register. 8-bit timer counter h1 is cleared to 00h. by performing procedures <3> and <4> repeatedly, a carrier clock with duty fixed to other than 50% is generated. <5> when the inttm51 signal is generated, it is synchronized with the 8-bit timer h1 count clock and is output as the inttm5h1 signal. <6> a carrier signal is output at the first rising edge of the carrier clock if nrz1 is set to 1. <7> when nrz1 = 0, the toh1 output is held at the high level and is not changed to low level while the carrier clock is high level (from <6> and <7>, the high-level width of the carrier clock waveform is guaranteed). remark inttm5h1 is an internal signal and not an interrupt source. chapter 8 8-bit timers h0 and h1 user?s manual u17336ej5v0ud 266 figure 8-15. carrier generator mode operation timing (3/3) (c) operation when cmp11 is changed 8-bit timer h1 count clock cmp01 tmhe1 inttmh1 carrier clock 00h 01h n 00h 01h 01h m 00h n 00h l 00h <1> <3>? <4> <3> <2> cmp11 <5> m n l m (l) 8-bit timer counter h1 count value <1> when tmhe1 = 1 is set, 8-bit timer h1 starts a count operation. at that time, the carrier clock remains default. <2> when the count value of 8-bit timer counter h1 ma tches the value of the cmp01 register, the inttmh1 signal is output, the carrier signal is inverted, and the ti mer counter is cleared to 00h. at the same time, the compare register whose value is to be compared with that of 8-bit timer counter h1 is changed from the cmp01 register to the cmp11 register. <3> the cmp11 register is asynchronous to the count clock, and its value c an be changed while 8-bit timer h1 is operating. the new value (l) to which the value of the register is to be changed is latched. when the count value of 8-bit timer counter h1 matches the value (m) of the cmp11 register bef ore the change, the cmp11 register is changed (<3>?). however, it takes three count clo cks or more since the value of the cmp11 register ha s been changed until the value is transferred to the regist er. even if a match signal is generat ed before the duration of three count clocks elapses, the new value is not transferred to the register. <4> when the count value of 8-bit timer counter h1 ma tches the value (m) of the cmp1 register before the change, the inttmh1 signal is output, the carrier signal is inverted, and the timer counter is cleared to 00h. at the same time, the compare register whose value is to be compared with that of 8-bit timer counter h1 is changed from the cmp11 regist er to the cmp01 register. <5> the timing at which the count value of 8-bit timer counter h1 and the cmp11 regi ster value match again is indicated by the value after the change (l). user?s manual u17336ej5v0ud 267 chapter 9 watch timer 9.1 functions of watch timer the watch timer has the following functions. ? watch timer ? interval timer the watch timer and the interval timer can be used simultaneously. figure 9-1 shows the watch timer block diagram. figure 9-1. block diagram of watch timer f prs /2 7 f w /2 4 f w /2 5 f w /2 6 f w /2 7 f w /2 8 f w /2 10 f w /2 11 f w /2 9 f sub intwt intwti wtm0 wtm1 wtm2 wtm3 wtm4 wtm5 wtm6 wtm7 f w clear 11-bit prescaler clear 5-bit counter watch timer operation mode register (wtm) internal bus selector selector selector selector f wx /2 4 f wx /2 5 f wx remark f prs : peripheral hardware clock frequency f sub : subsystem clock frequency f w : watch timer clock frequency (f prs /2 7 or f sub ) f wx : f w or f w /2 9 chapter 9 watch timer user?s manual u17336ej5v0ud 268 (1) watch timer when the peripheral hardware clock or subsystem cloc k is used, interrupt request signals (intwt) are generated at preset intervals. table 9-1. watch timer interrupt time interrupt time when operated at f sub = 32.768 khz when operated at f prs = 2 mhz when operated at f prs = 5 mhz when operated at f prs = 10 mhz when operated at f prs = 20 mhz 2 4 /f w 488 s 1.02 ms 410 s 205 s 102 s 2 5 /f w 977 s 2.05 ms 819 s 410 s 205 s 2 13 /f w 0.25 s 0.52 s 0.210 s 0.105 s 52.5 ms 2 14 /f w 0.5 s 1.05 s 0.419 s 0. 210 s 0.105 s remark f prs : peripheral hardware clock frequency f sub : subsystem clock frequency f w : watch timer clock frequency (f prs /2 7 or f sub ) (2) interval timer interrupt request signals (intwti) are generated at preset time intervals. table 9-2. interval timer interval time interval time when operated at f sub = 32.768 khz when operated at f prs = 2 mhz when operated at f prs = 5 mhz when operated at f prs = 10 mhz when operated at f prs = 20 mhz 2 4 /f w 488 s 1.02 ms 410 s 205 s 102 s 2 5 /f w 977 s 2.05 ms 820 s 410 s 205 s 2 6 /f w 1.95 ms 4.10 ms 1.64 ms 820 s 410 s 2 7 /f w 3.91 ms 8.20 ms 3.28 ms 1.64 ms 820 s 2 8 /f w 7.81 ms 16.4 ms 6.55 ms 3.28 ms 1.64 ms 2 9 /f w 15.6 ms 32.8 ms 13.1 ms 6.55 ms 3.28 ms 2 10 /f w 31.3 ms 65.5 ms 26.2 ms 13.1 ms 6.55 ms 2 11 /f w 62.5 ms 131.1 ms 52.4 ms 26.2 ms 13.1 ms remark f prs : peripheral hardware clock frequency f sub : subsystem clock frequency f w : watch timer clock frequency (f prs /2 7 or f sub ) 9.2 configuration of watch timer the watch timer includes the following hardware. table 9-3. watch timer configuration item configuration counter 5 bits 1 prescaler 11 bits 1 control register watch timer operation mode register (wtm) chapter 9 watch timer user?s manual u17336ej5v0ud 269 9.3 register controlling watch timer the watch timer is controlled by the wa tch timer operation mode register (wtm). ? watch timer operation mode register (wtm) this register sets the watch timer count clock, enabl es/disables operation, prescaler interval time, and 5-bit counter operation control. wtm is set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation clears wtm to 00h. chapter 9 watch timer user?s manual u17336ej5v0ud 270 figure 9-2. format of watch timer operation mode register (wtm) address: ff6fh after reset: 00h r/w symbol 7 6 5 4 3 2 <1> <0> wtm wtm7 wtm6 wtm5 wtm4 wtm3 wtm2 wtm1 wtm0 watch timer count clock selection (f w ) note wtm7 f sub = 32.768 khz f prs = 2 mhz f prs = 5 mhz f prs = 10 mhz f prs = 20 mhz 0 f prs /2 7 ? 15.625 khz 39.062 khz 78.125 khz 156.25 khz 1 f sub 32.768 khz ? wtm6 wtm5 wtm4 prescaler interval time selection 0 0 0 2 4 /f w 0 0 1 2 5 /f w 0 1 0 2 6 /f w 0 1 1 2 7 /f w 1 0 0 2 8 /f w 1 0 1 2 9 /f w 1 1 0 2 10 /f w 1 1 1 2 11 /f w wtm3 wtm2 selection of watch timer interrupt time 0 0 2 14 /f w 0 1 2 13 /f w 1 0 2 5 /f w 1 1 2 4 /f w wtm1 5-bit counter operation control 0 clear after operation stop 1 start wtm0 watch timer operation enable 0 operation stop (clear bot h prescaler and 5-bit counter) 1 operation enable note if the peripheral hardware clock (f prs ) operates on the high-speed system clock (f xh ) (xsel = 1), the f prs operating frequency varies depending on the supply voltage. ? v dd = 4.0 to 5.5 v: f prs 20 mhz ? v dd = 2.7 to 4.0 v: f prs 10 mhz ? v dd = 1.8 to 2.7 v: f prs 5 mhz (standard and (a) grade products only) caution do not change the count clock and interval ti me (by setting bits 4 to 7 (wtm4 to wtm7) of wtm) during watch timer operation. remarks 1. f w : watch timer clock frequency (f prs /2 7 or f sub ) 2. f prs : peripheral hardware clock frequency 3. f sub : subsystem clock frequency chapter 9 watch timer user?s manual u17336ej5v0ud 271 9.4 watch timer operations 9.4.1 watch timer operation the watch timer generates an interrupt request signal (int wt) at a specific time interval by using the peripheral hardware clock or subsystem clock. when bit 0 (wtm0) and bit 1 (wtm1) of the watch timer oper ation mode register (wtm) are set to 1, the count operation starts. when these bits are cleared to 0, t he 5-bit counter is cleared an d the count operation stops. when the interval timer is simultaneously operated, zero -second start can be achieved only for the watch timer by clearing wtm1 to 0. in this case, however, the 11-bit prescaler is not cleared. therefore, an error up to 2 9 1/f w seconds occurs in the first overfl ow (intwt) after zero-second start. the interrupt request is generated at the following time intervals. table 9-4. watch timer interrupt time wtm3 wtm2 interrupt time selection when operated at f sub = 32.768 khz (wtm7 = 1) when operated at f prs = 2 mhz (wtm7 = 0) when operated at f prs = 5 mhz (wtm7 = 0) when operated at f prs = 10 mhz (wtm7 = 0) when operated at f prs = 20 mhz (wtm7 = 0) 0 0 2 14 /f w 0.5 s 1.05 s 0.419 s 0. 210 s 0.105 s 0 1 2 13 /f w 0.25 s 0.52 s 0.210 s 0.105 s 52.5 ms 1 0 2 5 /f w 977 s 2.05 ms 819 s 410 s 205 s 1 1 2 4 /f w 488 s 1.02 ms 410 s 205 s 102 s remarks 1. f w : watch timer clock frequency (f prs /2 7 or f sub ) 2. f prs : peripheral hardware clock frequency 3. f sub : subsystem clock frequency 9.4.2 interval timer operation the watch timer operates as interval timer which gener ates interrupt request signal s (intwti) repeatedly at an interval of the preset count value. the interval time can be selected with bits 4 to 6 (wtm 4 to wtm6) of the watch timer operation mode register (wtm). when bit 0 (wtm0) of the wtm is set to 1, the count operation starts. when this bit is set to 0, the count operation stops. table 9-5. interval timer interval time wtm6 wtm5 wtm4 interval time when operated at f sub = 32.768 khz (wtm7 = 1) when operated at f prs = 2 mhz (wtm7 = 0) when operated at f prs = 5 mhz (wtm7 = 0) when operated at f prs = 10 mhz (wtm7 = 0) when operated at f prs = 20 mhz (wtm7 = 0) 0 0 0 2 4 /f w 488 s 1.02 ms 410 s 205 s 102 s 0 0 1 2 5 /f w 977 s 2.05 ms 820 s 410 s 205 s 0 1 0 2 6 /f w 1.95 ms 4.10 ms 1.64 ms 820 s 410 s 0 1 1 2 7 /f w 3.91 ms 8.20 ms 3.28 ms 1.64 ms 820 s 1 0 0 2 8 /f w 7.81 ms 16.4 ms 6.55 ms 3.28 ms 1.64 ms 1 0 1 2 9 /f w 15.6 ms 32.8 ms 13.1 ms 6.55 ms 3.28 ms 1 1 0 2 10 /f w 31.3 ms 65.5 ms 26.2 ms 13.1 ms 6.55 ms 1 1 1 2 11 /f w 62.5 ms 131.1 ms 52.4 ms 26.2 ms 13.1 ms remarks 1. f w : watch timer clock frequency (f prs /2 7 or f sub ) 2. f prs : peripheral hardware clock frequency 3. f sub : subsystem clock frequency chapter 9 watch timer user?s manual u17336ej5v0ud 272 figure 9-3. operation timing of watch timer/interval timer 0h start overflow overflow 5-bit counter count clock watch timer interrupt intwt interval timer interrupt intwti interrupt time of watch timer (0.5 s) interval time (t) t interrupt time of watch timer (0.5 s) remark f w : watch timer clock frequency figures in parentheses are for operation with f w = 32.768 khz (wtm7 = 1, wtm3, wtm2 = 0, 0) 9.5 cautions for watch timer when operation of the watch timer and 5- bit counter is enabled by the watch timer mode control register (wtm) (by setting bits 0 (wtm0) and 1 (wtm1) of wtm to 1), the in terval until the first interrupt request signal (intwt) is generated after the register is set does not exactly match th e specification made with bits 2 and 3 (wtm2, wtm3) of wtm. subsequently, however, the intwt signal is generated at the specified intervals. figure 9-4. example of generation of watc h timer interrupt request signal (intwt) (when interrupt period = 0.5 s) it takes 0.515625 seconds for the first intwt to be generated (2 9 1/32768 = 0.015625 s longer). intwt is then generated every 0.5 seconds. 0.5 s 0.5 s 0.515625 s wtm0, wtm1 intwt user?s manual u17336ej5v0ud 273 chapter 10 watchdog timer 10.1 functions of watchdog timer the watchdog timer operates on the internal low-speed oscillation clock. the watchdog timer is used to detect an inadvertent program loop. if a program loop is detected, an internal reset signal is generated. program loop is detected in the following cases. ? if the watchdog timer counter overflows ? if a 1-bit manipulation instruction is execut ed on the watchdog timer enable register (wdte) ? if data other than ?ach? is written to wdte ? if data is written to wdte during a window close period ? if the instruction is fetched from an area not set by the ims and ixs registers (detection of an invalid check while the cpu hangs up) ? if the cpu accesses an area that is not set by t he ims and ixs registers (excluding fb00h to ffffh) by executing a read/write instruct ion (detection of an abnormal access during a cpu program loop) when a reset occurs due to the watchdog timer, bit 4 (wdtrf) of the reset control flag register (resf) is set to 1. for details of resf, see chapter 21 reset function . chapter 10 watchdog timer user?s manual u17336ej5v0ud 274 10.2 configuration of watchdog timer the watchdog timer includes the following hardware. table 10-1. configuration of watchdog timer item configuration control register watchdog timer enable register (wdte) how the counter operation is controlled, overflow ti me, and window open period are set by the option byte. table 10-2. setting of op tion bytes and watchdog timer setting of watchdog timer option byte (0080h) window open period bits 6 and 5 (window1, window0) controlling counter operation of watchdog timer bit 4 (wdton) overflow time of watchdog timer bits 3 to 1 (wdcs2 to wdcs0) remark for the option byte, see chapter 24 option byte . figure 10-1. block diag ram of watchdog timer f rl /2 clock input controller reset output controller internal reset signal internal bus selector 17-bit counter 2 10 /f rl to 2 17 /f rl watchdog timer enable register (wdte) clear, reset control wdton of option byte (0080h) window1 and window0 of option byte (0080h) count clear signal wdcs2 to wdcs0 of option byte (0080h) overflow signal cpu access signal cpu access error detector window size determination signal chapter 10 watchdog timer user?s manual u17336ej5v0ud 275 10.3 register controlling watchdog timer the watchdog timer is controlled by the watchdog timer enable register (wdte). (1) watchdog timer enable register (wdte) writing ach to wdte clears the watchdog timer counter and starts counting again. this register can be set by an 8-bit memory manipulation instruction. reset signal generation sets this register to 9ah or 1ah note . figure 10-2. format of watchdog timer enable register (wdte) 0 1 2 3 4 5 6 7 symbol wdte address: ff99h after reset: 9ah/1ah note r/w note the wdte reset value differs depending on the wdto n setting value of the option byte (0080h). to operate watchdog timer, set wdton to 1. wdton setting value wdte reset value 0 (watchdog timer count operation disabled) 1ah 1 (watchdog timer count operation enabled) 9ah cautions 1. if a value other than ach is written to wdte, an internal reset signal is generated. if the source clock to the watchdog timer is stopped, however, an internal reset signal is generated when the source clock to the watchdog timer resumes operation. 2. if a 1-bit memory manipulation instructio n is executed for wdte, an internal reset signal is generated. if the source clock to the wa tchdog timer is stopped, however, an internal reset signal is genera ted when the source clock to th e watchdog timer resumes operation. 3. the value read from wdte is 9ah/1ah (this differs fr om the written value (ach)). chapter 10 watchdog timer user?s manual u17336ej5v0ud 276 10.4 operation of watchdog timer 10.4.1 controlling operation of watchdog timer 1. when the watchdog timer is used, its operati on is specified by the option byte (0080h). ? enable counting operation of the watchdog timer by se tting bit 4 (wdton) of the option byte (0080h) to 1 (the counter starts operating after a reset release) (for details, see chapter 26 ). wdton operation control of watchdog ti mer counter/illegal access detection 0 counter operation disabled (counting stopped after rese t), illegal access detection operation disabled 1 counter operation enabled (counting started after reset), illegal access detection operation enabled ? set an overflow time by using bits 3 to 1 (wdcs2 to wdcs0) of the option byte (0080h) (for details, see 10.4.2 and chapter 24 ). ? set a window open period by using bits 6 and 5 (wi ndow1 and window0) of the opt ion byte (0080h) (for details, see 10.4.3 and chapter 24 ). 2. after a reset release, the watchdog timer starts counting. 3. by writing ?ach? to wdte after the watchdog timer starts counting and before the overflow time set by the option byte, the watchdog timer is cl eared and starts counting again. 4. after that, write wdte the second time or later afte r a reset release during the window open period. if wdte is written during a window close period, an internal reset signal is generated. 5. if the overflow time expires without ?ach? wri tten to wdte, an internal reset signal is generated. a internal reset signal is generated in the following cases. ? if a 1-bit manipulation instruction is execut ed on the watchdog timer enable register (wdte) ? if data other than ?ach? is written to wdte ? if the instruction is fetched from an area not set by the ims and ixs registers (det ection of an invalid check during a cpu program loop) ? if the cpu accesses an area not set by the ims and ixs registers (excluding fb00h to ffffh) by executing a read/write instruction (det ection of an abnormal access during a cpu program loop) cautions 1. the first writing to wdte after a reset releas e clears the watchdog timer, if it is made before the overflow time regardless of the timing of the writing, and the watchdog timer starts counting again. 2. if the watchdog timer is cleared by writi ng ?ach? to wdte, the actual overflow time may be different from the overflow time set by the option byte by up to 2/f rl seconds. 3. the watchdog timer can be cleared immediately before the count value overflows (ffffh). chapter 10 watchdog timer user?s manual u17336ej5v0ud 277 cautions 4. the operation of the watchdog time r in the halt and stop modes differs as follows depending on the set value of bit 0 (lsrosc) of the option byte. lsrosc = 0 (internal low-speed oscillator can be stopped by software) lsrosc = 1 (internal low-speed oscillator cannot be stopped) in halt mode in stop mode watchdog timer operation stops. watchdog timer operation continues. if lsrosc = 0, the watchdog timer resu mes counting after the halt or stop mode is released. at this time, the counter is not clear ed to 0 but starts counting from the value at which it was stopped. if oscillation of the internal low-speed osc illator is stopped by setting lsrstop (bit 1 of the internal oscillation mode register (rcm) = 1) when lsrosc = 0, the watchdog timer stops operating. at this time, the counter is not cleared to 0. 5. the watchdog timer continues its operati on during self programming and eeprom emulation of the flash memory. during processing, the interrupt acknowledge time is delayed. set the overflow time and window size taki ng this delay into consideration. 10.4.2 setting overflow time of watchdog timer set the overflow time of the watchdog timer by using bits 3 to 1 (wdcs2 to wdcs0) of the option byte (0080h). if an overflow occurs, an internal reset signal is generat ed. the present count is cleared and the watchdog timer starts counting again by writing ?ach? to wdte dur ing the window open period before the overflow time. the following overflow time is set. table 10-3. setting of over flow time of watchdog timer wdcs2 wdcs1 wdcs0 overflow time of watchdog timer 0 0 0 2 10 /f rl (3.88 ms) 0 0 1 2 11 /f rl (7.76 ms) 0 1 0 2 12 /f rl (15.52 ms) 0 1 1 2 13 /f rl (31.03 ms) 1 0 0 2 14 /f rl (62.06 ms) 1 0 1 2 15 /f rl (124.12 ms) 1 1 0 2 16 /f rl (248.24 ms) 1 1 1 2 17 /f rl (496.48 ms) cautions 1. the combination of wdcs2 = wdcs1 = wdcs0 = 0 and window1 = window0 = 0 is prohibited. 2. the watchdog timer continues its ope ration during self pr ogramming and eeprom emulation of the flash memo ry. during processing, th e interrupt acknowledge time is delayed. set the overflow time a nd window size taking this delay into consideration. remarks 1. f rl : internal low-speed oscillation clock frequency 2. ( ): f rl = 264 khz (max.) chapter 10 watchdog timer user?s manual u17336ej5v0ud 278 10.4.3 setting window open period of watchdog timer set the window open period of the watchdog timer by usi ng bits 6 and 5 (window1, window0) of the option byte (0080h). the outline of the window is as follows. ? if ?ach? is written to wdte during the window open per iod, the watchdog timer is cleared and starts counting again. ? even if ?ach? is written to wdte during the window cl ose period, an abnormality is detected and an internal reset signal is generated. example : if the window open period is 25% window close period (75%) window open period (25%) counting starts overflow time counting starts again when ach is written to wdte. internal reset signal is generated if ach is written to wdte. caution the first writing to wdte after a reset release clears the watchdog timer, if it is made before the overflow time regardless of the timing of th e writing, and the watc hdog timer starts counting again. the window open period to be set is as follows. table 10-4. setting window open period of watchdog timer window1 window0 window open period of watchdog timer 0 0 25% 0 1 50% 1 0 75% 1 1 100% cautions 1. the combination of wdcs2 = wdcs1 = wdcs0 = 0 and window1 = window0 = 0 is prohibited. 2. the watchdog timer continues its ope ration during self pr ogramming and eeprom emulation of the flash memory. during pr ocessing, the interrupt acknowledge time is delayed. set the overflow time a nd window size taking this delay into consideration. chapter 10 watchdog timer user?s manual u17336ej5v0ud 279 remark if the overflow time is set to 2 10 /f rl , the window close time and open time are as follows. (when 2.7 v v dd 5.5 v) setting of window open period 25% 50% 75% 100% window close time 0 to 3.56 ms 0 to 2.37 ms 0 to 0.119 ms none window open time 3.56 to 3.88 ms 2.37 to 3.88 ms 0.119 to 3.88 ms 0 to 3.88 ms user?s manual u17336ej5v0ud 280 chapter 11 clock output controller (48-pin products only) 11.1 functions of clock output controller the clock output controller is intended for carrier output during remote controlled transmission and clock output for supply to peripheral ics. the clock selected with t he clock output selection register (cks) is output. figure 11-1 shows the block diagram of clock output controller. figure 11-1. block diagram of clock output controller f prs f prs to f prs /2 7 f sub cloe 8 pcl/intp6/p140 clock controller prescaler internal bus ccs3 clock output select register (cks) ccs2 ccs1 ccs0 output latch (p140) pm140 selector chapter 11 clock output co ntroller (48-pin products only) user?s manual u17336ej5v0ud 281 11.2 configuration of clock output controller the clock output controller includes the following hardware. table 11-1. configuration of clock output controller item configuration control registers clock output selection register (cks) port mode register 14 (pm14) port register 14 (p14) 11.3 registers controlling clock output controller the following two registers are used to co ntrol the clock output controller. ? clock output selection register (cks) ? port mode register 14 (pm14) (1) clock output selection register (cks) this register sets output enable/disable for clock output (pcl), and sets the output clock. cks is set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets cks to 00h. chapter 11 clock output co ntroller (48-pin products only) user?s manual u17336ej5v0ud 282 figure 11-2. format of clock out put selection register (cks) address: ff40h after reset: 00h r/w symbol 7 6 5 <4> 3 2 1 0 cks 0 0 0 cloe ccs3 ccs2 ccs1 ccs0 cloe pcl output enable/disable specification 0 clock division circui t operation stopped. pcl fixed to low level. 1 clock division ci rcuit operation enabled. pcl output enabled. pcl output clock selection note 1 ccs3 ccs2 ccs1 ccs0 f sub = 32.768 khz f prs = 10 mhz f prs = 20 mhz 0 0 0 0 f prs note 2 10 mhz setting prohibited note 3 0 0 0 1 f prs /2 5 mhz 10 mhz 0 0 1 0 f prs /2 2 2.5 mhz 5 mhz 0 0 1 1 f prs /2 3 1.25 mhz 2.5 mhz 0 1 0 0 f prs /2 4 625 khz 1.25 mhz 0 1 0 1 f prs /2 5 312.5 khz 625 khz 0 1 1 0 f prs /2 6 156.25 khz 312.5 khz 0 1 1 1 f prs /2 7 ? 78.125 khz 156.25 khz 1 0 0 0 f sub 32.768 khz ? other than above setting prohibited notes 1. if the peripheral hardware clock (f prs ) operates on the high-speed system clock (f xh ) (xsel = 1), the f prs operating frequency varies depending on the supply voltage. ? v dd = 4.0 to 5.5 v: f prs 20 mhz ? v dd = 2.7 to 4.0 v: f prs 10 mhz ? v dd = 1.8 to 2.7 v: f prs 5 mhz (standard and (a) grade products only) 2. if the peripheral hardware clock (f prs ) operates on the internal high-spe ed oscillation clock (xsel = 0) when 1.8 v v dd < 2.7 v, setting ccs3 = ccs2 = ccs1 = ccs0 = 0 (output clock of pcl: f prs ) is prohibited. 3. the pcl output clock prohibits settings if they exceed 10 mhz. caution set ccs3 to ccs0 while the clo ck output operation is stopped (cloe = 0). remarks 1. f prs : peripheral hardware clock frequency 2. f sub : subsystem clock frequency chapter 11 clock output co ntroller (48-pin products only) user?s manual u17336ej5v0ud 283 (2) port mode register 14 (pm14) this register sets port 14 input/output in 1-bit units. when using the p140/intp6/pcl pin for clock output, cl ear pm140 and the output latches of p140 to 0. pm14 is set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets pm14 to ffh. figure 11-3. format of port mode register 14 (pm14) address: ff2eh after reset: ffh r/w symbol 7 6 5 4 3 2 1 0 pm14 1 1 1 1 1 1 1 pm140 pm140 p140 pin i/o mode selection 0 output mode (output buffer on) 1 input mode (output buffer off) 11.4 operations of clock output controller the clock pulse is output as the following procedure. <1> select the clock pulse output frequency with bits 0 to 3 (ccs0 to ccs3) of the clock output selection register (cks) (clock pulse output in disabled status). <2> set bit 4 (cloe) of cks to 1 to enable clock output. remark the clock output controller is designed not to output pulses with a small width during output enable/disable switching of the clock output. as show n in figure 11-4, be sure to start output from the low period of the clock (marked with * in the figure) . when stopping output, do so after the high-level period of the clock. figure 11-4. remote control output application example cloe clock output ** user?s manual u17336ej5v0ud 284 chapter 12 a/d converter 12.1 function of a/d converter the a/d converter converts an analog input signal into a digi tal value, and consists of up to eight channels (ani0 to ani7 note ) with a resolution of 10 bits. the a/d converter has the following function. ? 10-bit resolution a/d conversion 10-bit resolution a/d conversion is carried out repeatedly for one analog input channel selected from ani0 to ani7 note . each time an a/d conversion operation en ds, an interrupt request (intad) is generated. note 38-pin products: ani0 to ani5 44-pin and 48-pin products: ani0 to ani7 figure 12-1. block diag ram of a/d converter av ref av ss intad adcs bit adcs fr2 fr1 adce fr0 sample & hold circuit av ss voltage comparator a/d converter mode register (adm) internal bus 3 ads2 ads1 ads0 analog input channel specification register (ads) ani0/p20 ani1/p21 ani2/p22 ani3/p23 ani4/p24 ani5/p25 ani6/p26 note ani7/p27 note controller a/d conversion result register (adcr) successive approximation register (sar) lv1 lv0 5 a/d port configuration register (adpc) adpc3 adpc2 adpc1 adpc0 4 selector tap selector note 44-pin and 48-pin products only chapter 12 a/d converter user?s manual u17336ej5v0ud 285 12.2 configuration of a/d converter the a/d converter includes the following hardware. (1) ani0 to ani7 pins note these are the analog input pins of the 8- channel a/d converter. they input analog signals to be converted into digital signals. pins other than the one selected as the analog input pin can be used as i/o port pins. note 38-pin products: ani0 to ani5 pins 44-pin and 48-pin products: ani0 to ani7 pins (2) sample & hold circuit the sample & hold circuit samples the input voltage of the analog input pin selected by the selector when a/d conversion is started, and holds the samp led voltage value during a/d conversion. (3) series resistor string the series resistor stri ng is connected between av ref and av ss , and generates a voltage to be compared with the sampled voltage value. figure 12-2. circuit configuration of series resistor string adcs series resistor string av ref p-ch av ss (4) voltage comparator the voltage comparator compares the sampled voltage value and the output volt age of the series resistor string. (5) successive approximation register (sar) this register converts the result of comparison by the voltage comparator, starting from the most significant bit (msb). when the voltage value is converted into a digital valu e down to the least significant bit (lsb) (end of a/d conversion), the contents of the sar register are transfe rred to the a/d conversion result register (adcr). (6) 10-bit a/d conversion r esult register (adcr) the a/d conversion result is loaded from the successive approximation register to th is register each time a/d conversion is completed, and the adcr re gister holds the a/d conversion result in its higher 10 bits (the lower 6 bits are fixed to 0). chapter 12 a/d converter user?s manual u17336ej5v0ud 286 (7) 8-bit a/d conversion result register (adcrh) the a/d conversion result is loaded from the successive approximation register to th is register each time a/d conversion is completed, and the adcrh register stores the higher 8 bi ts of the a/d conversion result. caution when data is read from adcr and adcrh, a wa it cycle is generated. do not read data from adcr and adcrh when the cpu is operating on the subsystem clock and the peripheral hardware clock is stopped. for de tails, see chapter 34 cautions for wait. (8) controller this circuit controls the conversion time of an input analog signal that is to be converted into a digital signal, as well as starting and stopping of t he conversion operation. when a/d c onversion has been completed, this controller generates intad. (9) av ref pin this pin inputs an analog power/reference voltage to the a/d converter. make this pin the same potential as the v dd pin when port 2 is used as a digital port. the signal input to the ani0 to ani7 pins note is converted into a digital signal, based on the voltage applied across av ref and av ss . (10) av ss pin this is the ground potential pin of the a/d converter. al ways use this pin at the same potential as that of the v ss pin even when the a/d converter is not used. (11) a/d converter mode register (adm) this register is used to set the conver sion time of the analog input signal to be converted, and to start or stop the conversion operation. (12) a/d port configuration register (adpc) this register switches the ani0/p20 to ani7/p27 pins note to analog input of a/d converter or digital i/o of port. (13) analog input channel sp ecification register (ads) this register is used to specify the port that inputs the analog voltage to be converted into a digital signal. (14) port mode register 2 (pm2) this register switches the ani0/p20 to ani7/p27 pins note to input or output. note 38-pin products: ani0 to ani5 pins 44-pin and 48-pin products: ani0 to ani7 pins chapter 12 a/d converter user?s manual u17336ej5v0ud 287 12.3 registers used in a/d converter the a/d converter uses the following six registers. ? a/d converter mode register (adm) ? a/d port configuration register (adpc) ? analog input channel specification register (ads) ? port mode register 2 (pm2) ? 10-bit a/d conversion result register (adcr) ? 8-bit a/d conversion result register (adcrh) (1) a/d converter mode register (adm) this register sets the conversion time for analog inpu t to be a/d converted, and starts/stops conversion. adm can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation clears this register to 00h. figure 12-3. format of a/d converter mode register (adm) adce lv0 note 1 lv1 note 1 fr0 note 1 fr1 note 1 fr2 note 1 0 adcs a/d conversion operation control stops conversion operation enables conversion operation adcs 0 1 <0> 1 2 3 4 5 6 <7> adm address: ff28h after reset: 00h r/w symbol comparator operation control note 2 stops comparator operation enables comparator operation adce 0 1 notes 1. for details of fr2 to fr0, lv 1, lv0, and a/d conversion, see table 12-2 a/d conversion time selection . 2. the operation of the compar ator is controlled by adcs and adce, and it takes 1 s from operation start to operation stabilization. theref ore, when adcs is set to 1 after 1 s or more has elapsed from the time adce is set to 1, the conversion result at that time has priority over the first conversion result. otherwise, ignore data of the first conversion. table 12-1. settings of adcs and adce adcs adce a/d co nversion operation 0 0 stop status (dc power consumption path does not exist) 0 1 conversion waiting mode (comparator oper ation, only comparator consumes power) 1 0 conversion mode (comparator operation stopped note ) 1 1 conversion mode (comparator operation) note ignore the first conversion data. chapter 12 a/d converter user?s manual u17336ej5v0ud 288 figure 12-4. timing chart wh en comparator is used adce comparator adcs conversion operation conversion operation conversion stopped conversion waiting comparator operation note note to stabilize the internal circuit, the time from the rising of the adce bit to the falling of the adcs bit must be 1 s or longer. cautions 1. a/d conversion must be stopped before re writing bits fr0 to fr2, lv1, and lv0 to values other than the identical data. 2. if data is written to adm, a wait cycle is generated. do not write data to adm when the cpu is operating on the subsystem clock and the periphera l hardware clock is stopped. for details, see chapter 34 cautions for wait. chapter 12 a/d converter user?s manual u17336ej5v0ud 289 table 12-2. a/d conversion time selection (1) 2.7 v av ref 5.5 v a/d converter mode register (adm) conversion time selection fr2 fr1 fr0 lv1 lv0 f prs = 2 mhz f prs = 10 mhz f prs = 20 mhz note conversion clock (f ad ) 0 0 0 0 0 264/f prs 26.4 s 13.2 s note f prs /12 0 0 1 0 0 176/f prs 17.6 s 8.8 s note f prs /8 0 1 0 0 0 132/f prs 13.2 s 6.6 s note f prs /6 0 1 1 0 0 88/f prs setting prohibited 8.8 s note f prs /4 1 0 0 0 0 66/f prs 33.0 s 6.6 s note f prs /3 1 0 1 0 0 44/f prs 22.0 s setting prohibited setting prohibited f prs /2 other than above setting prohibited note this can be set only when 4.0 v av ref 5.5 v. (2) 2.3 v av ref < 2.7 v a/d converter mode register (adm) conversion time selection fr2 fr1 fr0 lv1 lv0 f prs = 2 mhz f prs = 5 mhz conversion clock (f ad ) 0 0 0 0 1 480/f prs setting prohibited f prs /12 0 0 1 0 1 320/f prs 64.0 s f prs /8 0 1 0 0 1 240/f prs 48.0 s f prs /6 0 1 1 0 1 160/f prs setting prohibited 32.0 s f prs /4 1 0 0 0 1 120/f prs 60.0 s setting prohibited f prs /3 1 0 1 0 1 80/f prs 40.0 s setting prohibited f prs /2 other than above setting prohibited cautions 1. set the conversion ti mes with the following conditions. ? 4.0 v av ref 5.5 v: f ad = 0.6 to 3.6 mhz ? 2.7 v av ref < 4.0 v: f ad = 0.6 to 1.8 mhz ? 2.3 v av ref < 2.7 v: f ad = 0.6 to 1.48 mhz 2. when rewriting fr2 to fr0, lv1, and lv0 to other than the same data, stop a/d conversion once (adcs = 0) beforehand. 3. change lv1 and lv0 from the default value, when 2.3 v av ref < 2.7 v. 4. the above conversion time do es not include clock frequency e rrors. select conversion time, taking clock frequency erro rs into consideration. remark f prs : peripheral hardware clock frequency chapter 12 a/d converter user?s manual u17336ej5v0ud 290 figure 12-5. a/d converter sa mpling and a/d conversion timing adcs wait period note conversion time conversion time sampling sampling timing intad adcs 1 or ads rewrite sampling sar clear sar clear transfer to adcr, intad generation successive conversion note for details of wait period, see chapter 34 cautions for wait . (2) 10-bit a/d conversion r esult register (adcr) this register is a 16-bit register that stores the a/d conversion result. the lower 6 bits are fixed to 0. each time a/d conversion ends, the conversion result is loaded from the successive approximation register. the higher 8 bits of the conversion result are stor ed in ff09h and the lower 2 bits are st ored in the higher 2 bits of ff08h. adcr can be read by a 16-bit memory manipulation instruction. reset signal generation clears this register to 0000h. figure 12-6. format of 10-bit a/d conversion result register (adcr) symbol address: ff08h, ff09h after reset: 0000h r ff09h ff08h 0 0 0 0 0 0 adcr cautions 1. when writing to the a/d converter mode register (adm), analog input ch annel specification register (ads), and a/d port configuration register (adpc), the contents of adcr may become undefined. read the conversion resu lt following conversion completion before writing to adm, ads, and adpc. using timing other than the above m ay cause an incorrect conversion result to be read. 2. if data is read from adcr, a wait cycle is ge nerated. do not read data from adcr when the cpu is operating on the subsystem clock and th e peripheral hardware clock is stopped. for details, see chapter 34 cautions for wait. chapter 12 a/d converter user?s manual u17336ej5v0ud 291 (3) 8-bit a/d conversion result register (adcrh) this register is an 8-bit register that stores the a/d conversion result. the higher 8 bits of 10-bit resolution are stored. adcrh can be read by an 8-bit memory manipulation instruction. reset signal generation clears this register to 00h. figure 12-7. format of 8-bit a/d c onversion result register (adcrh) symbol adcrh address: ff09h after reset: 00h r 76543210 cautions 1. when writing to the a/d converter mode register (adm), analog input ch annel specification register (ads), and a/d port configuration register (adpc), the contents of adcrh may become undefined. read the conversion resu lt following conversion completion before writing to adm, ads, and adpc. using timing other than the above m ay cause an incorrect conversion result to be read. 2. if data is read from adcrh, a wait cycle is generated. do not r ead data from adcrh when the cpu is operating on the subsystem clock a nd the peripheral hardware clock is stopped. for details, see chapter 34 cautions for wait. chapter 12 a/d converter user?s manual u17336ej5v0ud 292 (4) analog input channel specification register (ads) this register specifies the input channel of the analog voltage to be a/d converted. ads can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation clears this register to 00h. figure 12-8. format of analog input channel specification register (ads) ads0 ads1 ads2 0 0 0 0 0 analog input channel specification note ani0 ani1 ani2 ani3 ani4 ani5 ani6 ani7 ads0 0 1 0 1 0 1 0 1 ads1 0 0 1 1 0 0 1 1 ads2 0 0 0 0 1 1 1 1 0 1 2 3 4 5 6 7 ads address: ff29h after reset: 00h r/w symbol note 38-pin products: ani0 to ani5 44-pin and 48-pin products: ani0 to ani7 cautions 1. be sure to cl ear bits 3 to 7 to ?0?. 2 set a channel to be used for a/d conversion in the input mode by usi ng port mode register 2 (pm2). 3. if data is written to ads, a wait cycle is generated. do not wr ite data to ads when the cpu is operating on the subsystem clock and the periphera l hardware clock is stopped. for details, see chapter 34 cautions for wait. 4. for the 38-pin products, setting ads2, ads1, ads 0 to 1, 1, 0 or 1, 1, 1 is prohibited. chapter 12 a/d converter user?s manual u17336ej5v0ud 293 (5) a/d port configuration register (adpc) this register switches the ani0/p20 to ani7/p27 pins note to analog input of a/d converter or digital i/o of port. adpc can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation clears this register to 00h. note 38-pin products: ani0/p20 to ani5/p25 pins 44-pin and 48-pin products ani0/p20 to ani7/p27 pins figure 12-9. format of a/d port configuration register (adpc) adpc0 adpc1 adpc2 adpc3 0 0 0 0 analog input (a)/digital i/o (d) switching setting prohibited adpc3 0 1 2 3 4 5 6 7 adpc address: ff2fh after reset: 00h r/w symbol ani7/ p27 a a a a a a a a d ani6/ p26 a a a a a a a d d ani5/ p25 a a a a a a d d d ani4/ p24 a a a a a d d d d ani3/ p23 a a a a d d d d d ani2/ p22 a a a d d d d d d ani1/ p21 a a d d d d d d d ani0/ p20 a d d d d d d d d 0 0 0 0 0 0 0 0 1 adpc2 0 0 0 0 1 1 1 1 0 adpc1 0 0 1 1 0 0 1 1 0 adpc0 0 1 0 1 0 1 0 1 0 other than above cautions 1. set a channel to be u sed for a/d conversion in the input mode by usi ng port mode register 2 (pm2). 2. if data is written to adpc, a wait cycle is ge nerated. do not write data to adpc when the cpu is operating on the subsystem clock and the peri pheral hardware clock is stopped. for details, see chapter 34 cautions for wait. 3. for the 38-pin products, setting adpc3, adpc2, adpc1, adpc0 to 0, 1, 1, 1 or 1, 0, 0, 0 is prohibited. chapter 12 a/d converter user?s manual u17336ej5v0ud 294 (6) port mode register 2 (pm2) when using the ani0/p20 to ani7/p27 pins note for analog input port, set pm20 to pm27 to 1. the output latches of p20 to p27 at this time may be 0 or 1. if pm20 to pm27 are set to 0, they cannot be used as analog input port pins. pm2 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to ffh. figure 12-10. format of port mode register 2 (pm2) pm20 pm21 pm22 pm23 pm24 pm25 pm26 pm27 p2n pin i/o mode selection (n = 0 to 7) output mode (output buffer on) input mode (output buffer off) pm2n 0 1 0 1 2 3 4 5 6 7 pm2 address: ff22h after reset: ffh r/w symbol caution for the 38-pin products, be sure to set bits 6 a nd 7 of pm2 to ?1?, and bits 6 and 7 of p2 to ?0?. ani0/p20 to ani7/p27 pins note are as shown below depending on the settings of adpc, ads, and pm2. table 12-3. setting functions of ani0/p20 to ani7/p27 pins adpc pm2 ads ani0/p20 to ani7/p27 pins note selects ani. analog input (to be converted) input mode does not select ani. analog input (not to be converted) selects ani. analog input selection output mode does not select ani. setting prohibited input mode ? digital input digital i/o selection output mode ? digital output note 38-pin products: ani0/p20 to ani5/p25 pins 44-pin and 48-pin products: ani0/p20 to ani7/p27 pins chapter 12 a/d converter user?s manual u17336ej5v0ud 295 12.4 a/d converter operations 12.4.1 basic operations of a/d converter <1> set bit 0 (adce) of the a/d converter mode register (adm) to 1 to start the operation of the comparator. <2> set channels for a/d conversion to analog input by usi ng the a/d port configuration register (adpc) and set to input mode by using port mode register 2 (pm2). <3> set a/d conversion time by using bits 5 to 1 (fr2 to fr0, lv1, and lv0) of adm. <4> select one channel for a/d conversion using the analog input channel specification register (ads). <5> start the conversion operation by setting bit 7 (adcs) of adm to 1. (<6> to <12> are operations performed by hardware.) <6> the voltage input to the selected analog input c hannel is sampled by the sample & hold circuit. <7> when sampling has been done for a certain time, the sa mple & hold circuit is placed in the hold state and the sampled voltage is held until the a/ d conversion operation has ended. <8> bit 9 of the successive approximation register (sar) is set. the series resistor string voltage tap is set to (1/2) av ref by the tap selector. <9> the voltage difference between the series resistor st ring voltage tap and sampled voltage is compared by the voltage comparator. if the analog input is greater than (1/2) av ref , the msb of sar remains set to 1. if the analog input is smaller than (1/2) av ref , the msb is reset to 0. <10> next, bit 8 of sar is automatically set to 1, and t he operation proceeds to the next comparison. the series resistor string voltage tap is selected according to the preset value of bit 9, as described below. ? bit 9 = 1: (3/4) av ref ? bit 9 = 0: (1/4) av ref the voltage tap and sampled voltage are compared and bit 8 of sar is manipulated as follows. ? analog input voltage voltage tap: bit 8 = 1 ? analog input voltage < voltage tap: bit 8 = 0 <11> comparison is continued in this way up to bit 0 of sar. <12> upon completion of the comparison of 10 bits, an effective digital result value remains in sar, and the result value is transferred to the a/d conversion resu lt register (adcr, adcrh) and then latched. at the same time, the a/d conversion end in terrupt request (intad) can also be generated. <13> repeat steps <6> to <12>, until adcs is cleared to 0. to stop the a/d converter, clear adcs to 0. to restart a/d conversion from the st atus of adce = 1, start from <5>. to start a/d conversion again when adce = 0, set adce to 1, wait for 1 s or longer, and start <5>. to change a channel of a/d conversion, start from <4>. caution make sure the period of <1> to <5> is 1 s or more. remark two types of a/d conversion re sult registers are available. ? adcr (16 bits): store 10-bit a/d conversion value ? adcrh (8 bits): store 8-bit a/d conversion value chapter 12 a/d converter user?s manual u17336ej5v0ud 296 figure 12-11. basic operation of a/d converter conversion time sampling time sampling a/d conversion undefined conversion result a/d converter operation sar adcr intad conversion result a/d conversion operations are performed continuously until bit 7 (adcs) of t he a/d converter mode register (adm) is reset (0) by software. if a write operation is performed to the analog input chan nel specification register (ads) during an a/d conversion operation, the conversion operation is in itialized, and if the adcs bit is set (1), conversion starts again from the beginning. reset signal generation clears the a/d conversion re sult register (adcr, adcrh) to 0000h or 00h. chapter 12 a/d converter user?s manual u17336ej5v0ud 297 12.4.2 input voltage and conversion results the relationship between the analog input voltag e input to the analog input pins (ani0 to ani7 note ) and the theoretical a/d conversion result (stored in the 10-bit a/d conversion result regi ster (adcr)) is shown by the following expression. sar = int ( 1024 + 0.5) adcr = sar 64 or ( ? 0.5) v ain < ( + 0.5) where, int( ): function which returns integer part of value in parentheses v ain : analog input voltage av ref : av ref pin voltage adcr: a/d conversion result register (adcr) value sar: successive approximation register note 38-pin products: ani0 to ani5 44-pin and 48-pin products: ani0 to ani7 figure 12-12 shows the relationship between the analo g input voltage and the a/d conversion result. figure 12-12. relationship between analog i nput voltage and a/d conversion result 1023 1022 1021 3 2 1 0 ffc0h ff80h ff40h 00c0h 0080h 0040h 0000h a/d conversion result sar adcr 1 2048 1 1024 3 2048 2 1024 5 2048 input voltage/av ref 3 1024 2043 2048 1022 1024 2045 2048 1023 1024 2047 2048 1 v ain av ref av ref 1024 av ref 1024 adcr 64 adcr 64 chapter 12 a/d converter user?s manual u17336ej5v0ud 298 12.4.3 a/d converter operation mode the operation mode of the a/d converter is the select mode. one channe l of analog input is selected from ani0 to ani7 note by the analog input channel specification re gister (ads) and a/d conversion is executed. note 38-pin products: ani0 to ani5 44-pin and 48-pin products: ani0 to ani7 (1) a/d conversion operation by setting bit 7 (adcs) of the a/d converter mode regist er (adm) to 1, the a/d conversion operation of the voltage, which is applied to the analog input pin specif ied by the analog input channel specification register (ads), is started. when a/d conversion has been completed, the result of the a/d c onversion is stored in t he a/d conversion result register (adcr), and an interrupt request signal (int ad) is generated. when one a/d conversion has been completed, the next a/d conversion oper ation is immediately started. if ads is rewritten during a/d conversion, the a/d conv ersion operation under execut ion is stopped and restarted from the beginning. if 0 is written to adcs during a/d conversion, a/d conv ersion is immediately stopped. at this time, the conversion result immediat ely before is retained. figure 12-13. a/d conversion operation anin rewriting adm adcs = 1 rewriting ads adcs = 0 anin anin anin anim anin anim anim stopped conversion result immediately before is retained a/d conversion adcr, adcrh intad conversion is stopped conversion result immediately before is retained remarks 1. n = 0 to 5 (38-pin products), n = 0 to 7 (44-pin and 48-pin products) 2. m = 0 to 5 (38-pin products), m = 0 to 7 (44-pin and 48-pin products) chapter 12 a/d converter user?s manual u17336ej5v0ud 299 the setting methods are described below. <1> set bit 0 (adce) of the a/d converter mode register (adm) to 1. <2> set the channel to be used in the analog input m ode by using bits 3 to 0 (adpc3 to adpc0) of the a/d port configuration register (adpc) and bits 7 to 0 (pm27 to pm20) of port mode register 2 (pm2). <3> select conversion time by using bits 5 to 1 (fr2 to fr0, lv1, and lv0) of adm. <4> select a channel to be used by using bits 2 to 0 (ads2 to ads0) of the analog input channel specification register (ads). <5> set bit 7 (adcs) of adm to 1 to start a/d conversion. <6> when one a/d conversion has been completed, an interrupt request signal (intad) is generated. <7> transfer the a/d conversion data to the a/d conversion result register (adcr, adcrh). chapter 12 a/d converter user?s manual u17336ej5v0ud 300 12.5 how to read a/d converter characteristics table here, special terms unique to the a/d converter are explained. (1) resolution this is the minimum analog input vo ltage that can be identif ied. that is, the perce ntage of the analog input voltage per bit of digital output is called 1lsb (least si gnificant bit). the percentage of 1lsb with respect to the full scale is expressed by %fsr (full scale range). 1lsb is as follows when the resolution is 10 bits. 1lsb = 1/2 10 = 1/1024 = 0.098%fsr accuracy has no relation to resolution, but is determined by overall error. (2) overall error this shows the maximum error value between the actual measured value and the theoretical value. zero-scale error, full-scale error, integral linearity error, and differential linearity errors that are combinations of these express the overall error. note that the quantization error is not included in the overall erro r in the characteristics table. (3) quantization error when analog values are converted to digital values, a 1/2lsb error naturally occurs. in an a/d converter, an analog input voltage in a range of 1/2lsb is converted to the same digita l code, so a quantization error cannot be avoided. note that the quantization erro r is not included in the overall error, zero -scale error, full-scale error, integral linearity error, and differential linearity error in the characteristics table. figure 12-14. overall error figur e 12-15. quanti zation error ideal line 0 ?? 0 1 ?? 1 digital output overall error analog input av ref 0 0 ?? 0 1 ?? 1 digital output quantization error 1/2lsb 1/2lsb analog input 0 av ref (4) zero-scale error this shows the difference between the actual measuremen t value of the analog input vo ltage and the theoretical value (1/2lsb) when the digital output changes from 0......000 to 0......001. if the actual measurement value is greater than the theore tical value, it shows the difference between the actual measurement value of the analog in put voltage and the theoretical val ue (3/2lsb) when the digital output changes from 0??001 to 0??010. chapter 12 a/d converter user?s manual u17336ej5v0ud 301 (5) full-scale error this shows the difference between the actual measuremen t value of the analog input vo ltage and the theoretical value (full-scale ? 3/2lsb) when the digital output chan ges from 1......110 to 1......111. (6) integral linearity error this shows the degree to which the conversion charac teristics deviate from the ideal linear relationship. it expresses the maximum value of the di fference between the actual measurement value and the ideal straight line when the zero-scale error and full-scale error are 0. (7) differential linearity error while the ideal width of code output is 1lsb, this indi cates the difference between the actual measurement value and the ideal value. figure 12-16. zero-scale error figure 12-17. full-scale error 111 011 010 001 zero-scale error ideal line 000 01 2 3 av ref digital output (lower 3 bits) analog input (lsb) 111 110 101 000 0 av ref ? 3 full-scale error ideal line analog input (lsb) digital output (lower 3 bits) av ref ? 2av ref ? 1 av ref figure 12-18. integral linearity error figure 12-19. differential linearity error 0 av ref digital output analog input integral linearity error ideal line 1 ?? 1 0 ?? 0 0 av ref digital output analog input differential linearity error 1 ?? 1 0 ?? 0 ideal 1lsb width (8) conversion time this expresses the time from the start of samp ling to when the digital output is obtained. the sampling time is included in the conv ersion time in the characteristics table. (9) sampling time this is the time the analog switch is turned on for the anal og voltage to be sampled by the sample & hold circuit. sampling time conversion time chapter 12 a/d converter user?s manual u17336ej5v0ud 302 12.6 cautions for a/d converter (1) operating current in stop mode the a/d converter stops operating in the stop mode. at this time, th e operating current can be reduced by clearing bit 7 (adcs) and bit 0 (adce) of the a/d converter mode register (adm) to 0. to restart from the standby status, clear bit 0 (adif) of interrupt request flag register 1l (if1l) to 0 and start operation. (2) input range of ani0 to ani7 note observe the rated range of the ani0 to ani7 note input voltage. if a voltage of av ref or higher and av ss or lower (even in the range of absolute maximum ratings) is input to an analog input channel, the converted value of that channel becomes undefined. in addition, the converted values of the other channels may also be affected. (3) conflicting operations <1> conflict between a/d conversion result regist er (adcr, adcrh) write and adcr or adcrh read by instruction upon the end of conversion adcr or adcrh read has priority. after the read op eration, the new co nversion result is written to adcr or adcrh. <2> conflict between adcr or adcrh write and a/d converter mode regi ster (adm) write, analog input channel specification register (ads), or a/d port configuration register (a dpc) write upon the end of conversion adm, ads, or adpc write has priority. adcr or adcrh write is not performed, nor is the conversion end interrupt signal (intad) generated. (4) noise countermeasures to maintain the 10-bit resolution, attent ion must be paid to noise input to the av ref pin and ani0 to ani7 pins note . <1> connect a capacitor with a low equivalent resistance and a good frequency response to the power supply. <2> the higher the output impedance of the analog input source, the greater the influence. to reduce the noise, connecting external c as shown in figure 12-20 is recommended. <3> do not switch these pins wit h other pins during conversion. <4> the accuracy is improved if the halt mode is set immediately after the start of conversion. note 38-pin products: ani0 to ani5 pins 44-pin and 48-pin products: ani0 to ani7 pins chapter 12 a/d converter user?s manual u17336ej5v0ud 303 figure 12-20. analog input pin connection reference voltage input c = 100 to 1,000 pf if there is a possibility that noise equal to or higher than av ref or equal to or lower than av ss may enter, clamp with a diode with a small v f value (0.3 v or lower). av ref av ss v ss ani0 to ani7 note (5) ani0/p20 to ani7/p27 note <1> the analog input pins (ani0 to ani7 note ) are also used as input port pins (p20 to p27 note ). when a/d conversion is performed with any of ani0 to ani7 note selected, do not access p20 to p27 note while conversion is in progress; otherwis e the conversion resolution may be degraded. it is recommended to select pins used as p20 to p27 note starting with the ani0/p20 that is the furthest from av ref . <2> if a digital pulse is applied to the pins adjacent to t he pins currently used for a/ d conversion, the expected value of the a/d conversion may not be obtained due to coupling noise. t herefore, do not apply a pulse to the pins adjacent to the pi n undergoing a/d conversion. (6) input impedance of ani0 to ani7 pins note this a/d converter charges a sampling capacitor for sampling during sampling time. therefore, only a leakage current fl ows when sampling is not in progre ss, and a current that charges the capacitor flows during sampling. consequently, the input impedance fluctuates depending on whether sampling is in progress, and on the other states. to make sure that sampling is effective, however, it is recommended to keep the ou tput impedance of the analog input source to within 10 k , and to connect a capacitor of about 100 pf to the ani0 to ani7 pins note (see figure 12-20 ). (7) av ref pin input impedance a series resistor string of several tens of k is connected between the av ref and av ss pins. therefore, if the output impedance of t he reference voltage source is high, this will result in a series connection to the series resistor string between the av ref and av ss pins, resulting in a large reference voltage error. note 38-pin products: ani0/p20 to ani5/p25 pins 44-pin and 48-pin products: ani0/p20 to ani7/p27 pins chapter 12 a/d converter user?s manual u17336ej5v0ud 304 (8) interrupt request flag (adif) the interrupt request flag (adif) is not cleared even if th e analog input channel specification register (ads) is changed. therefore, if an analog input pin is changed during a/d conversion, the a/d conversion result and adif for the pre-change analog input may be set just before the ads rewrit e. caution is therefore re quired since, at this time, when adif is read immediately after the ads rewrite, ad if is set despite the fact a/d conversion for the post- change analog input has not ended. when a/d conversion is stopped and then resumed, clear ad if before the a/d conversion operation is resumed. figure 12-21. timing of a/d conver sion end interrupt request generation ads rewrite (start of anin conversion) a/d conversion adcr adif anin anin anim anim anin anin anim anim ads rewrite (start of anim conversion) adif is set but anim conversion has not ended. remarks 1. n = 0 to 5 (38-pin products), n = 0 to 7 (44-pin and 48-pin products) 2. m = 0 to 5 (38-pin products), m = 0 to 7 (44-pin and 48-pin products) (9) conversion results just after a/d conversion start the first a/d conversion value immediately after a/d conv ersion starts may not fall wit hin the rating range if the adcs bit is set to 1 within 1 s after the adce bit was set to 1, or if t he adcs bit is set to 1 with the adce bit = 0. take measures such as pollin g the a/d conversion end interrupt r equest (intad) and removing the first conversion result. (10) a/d conversion result regist er (adcr, adcrh) read operation when a write operation is performed to the a/d conver ter mode register (adm), analog input channel specification register (ads), and a/ d port configuration register (adp c), the contents of adcr and adcrh may become undefined. read the conversion re sult following conversion completion before writing to adm, ads, and adpc. using a timing other than the above may cause an incorrect conversion result to be read. chapter 12 a/d converter user?s manual u17336ej5v0ud 305 (11) internal equivalent circuit the equivalent circuit of the analog input block is shown below. figure 12-22. internal equi valent circuit of anin pin anin c1 c2 r1 table 12-4. resistance and capacitance valu es of equivalent circui t (reference values) av ref r1 c1 c2 4.0 v av ref 5.5 v 8.1 k 8 pf 5 pf 2.7 v av ref < 4.0 v 31 k 8 pf 5 pf 2.3 v av ref < 2.7 v 381 k 8 pf 5 pf remarks 1. the resistance and capacitance values shown in table 12-4 are not guaranteed values. 2. n = 0 to 5 (38-pin products), n = 0 to 7 (44-pin and 48-pin products) user?s manual u17336ej5v0ud 306 chapter 13 serial interface uart0 13.1 functions of serial interface uart0 serial interface uart0 has the following two modes. (1) operation stop mode this mode is used when serial communication is not executed and can enable a reduction in the power consumption. for details, see 13.4.1 operation stop mode . (2) asynchronous serial interface (uart) mode the functions of this mode are outlined below. for details, see 13.4.2 asynchronous seri al interface (uart) mode and 13.4.3 dedicated baud rate generator . ? maximum transfer rate: 625 kbps ? two-pin configuration t x d0: transmit data output pin r x d0: receive data input pin ? length of communication data can be selected from 7 or 8 bits. ? dedicated on-chip 5-bit baud rate generator allowing any baud rate to be set ? transmission and reception can be performe d independently (full-duplex operation). ? fixed to lsb-first communication cautions 1. if clock supply to serial interface uart0 is not stopped (e.g., in the halt mode), normal operation continues. if clock supply to serial interface uart0 is stopped (e.g., in the stop mode), each register stops operating, and hold s the value immediatel y before clock supply was stopped. the t x d0 pin also holds the value imme diately before clock supply was stopped and outputs it. however, the operati on is not guaranteed after clock supply is resumed. therefore, reset the circuit so th at power0 = 0, rxe0 = 0, and txe0 = 0. 2. set power0 = 1 and then set txe0 = 1 (tr ansmission) or rxe0 = 1 (reception) to start communication. 3. txe0 and rxe0 are synch ronized by the base clock (f xclk0 ) set by brgc0. to enable transmission or reception again, set txe0 or rxe0 to 1 at least tw o clocks of base clock after txe0 or rxe0 has been clear ed to 0. if txe0 or rxe0 is set within two clocks of base clock, the transmission ci rcuit or reception circui t may not be initialized. 4. set transmit data to t xs0 at least one base clock (f xclk0 ) after setting txe0 = 1. chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 307 13.2 configuration of serial interface uart0 serial interface uart0 includes the following hardware. table 13-1. configurati on of serial interface uart0 item configuration registers receive buffer register 0 (rxb0) receive shift register 0 (rxs0) transmit shift register 0 (txs0) control registers asynchronous serial interface o peration mode register 0 (asim0) asynchronous serial interface recepti on error status register 0 (asis0) baud rate generator control register 0 (brgc0) port mode register 1 (pm1) port register 1 (p1) chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 308 chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 309 (1) receive buffer register 0 (rxb0) this 8-bit register stores parallel data conv erted by receive shift register 0 (rxs0). each time 1 byte of data has been received, new receive dat a is transferred to this r egister from receive shift register 0 (rxs0). if the data length is set to 7 bits the receive data is tran sferred to bits 0 to 6 of rxb0 and the msb of rxb0 is always 0. if an overrun error (ove0) occurs, the rece ive data is not transferred to rxb0. rxb0 can be read by an 8-bit memory manipulation inst ruction. no data can be written to this register. reset signal generation and power0 = 0 set this register to ffh. (2) receive shift register 0 (rxs0) this register converts the serial data input to the r x d0 pin into parallel data. rxs0 cannot be directly manipulated by a program. (3) transmit shift register 0 (txs0) this register is used to set transmit data. transmission is started when data is written to txs0, and serial data is transmitted from the t x d0 pins. txs0 can be written by an 8-bit memory manipulatio n instruction. this register cannot be read. reset signal generation, power0 = 0, and txe0 = 0 set this register to ffh. cautions 1. set transmit data to txs0 at least one base clock (f xclk0 ) after setting txe0 = 1. 2. do not write the next transmit data to t xs0 before the transmissi on completion interrupt signal (intst0) is generated. chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 310 13.3 registers controlling serial interface uart0 serial interface uart0 is controlled by the following five registers. ? asynchronous serial interface operation mode register 0 (asim0) ? asynchronous serial interface recept ion error status register 0 (asis0) ? baud rate generator control register 0 (brgc0) ? port mode register 1 (pm1) ? port register 1 (p1) (1) asynchronous serial interface ope ration mode register 0 (asim0) this 8-bit register controls the serial comm unication operations of serial interface uart0. this register can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to 01h. figure 13-2. format of asynchronous serial inte rface operation mode register 0 (asim0) (1/2) address: ff70h after reset: 01h r/w symbol <7> <6> <5> 4 3 2 1 0 asim0 power0 txe0 rxe0 ps01 ps00 cl0 sl0 1 power0 enables/disables operati on of internal operation clock 0 note 1 disables operation of the internal operation clock (fixes the clock to low level) and asynchronously resets the internal circuit note 2 . 1 enables operation of the internal operation clock. txe0 enables/disables transmission 0 disables transmission (synchronously resets th e transmission circuit). 1 enables transmission. rxe0 enables/disables reception 0 disables reception (synchronous ly resets the reception circuit). 1 enables reception. notes 1. the input from the r x d0 pin is fixed to high level when power0 = 0. 2. asynchronous serial interface reception error status register 0 (asis0), transmit shift register 0 (txs0), and receive buffer register 0 (rxb0) are reset. chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 311 figure 13-2. format of asynchronous serial inte rface operation mode register 0 (asim0) (2/2) ps01 ps00 transmission oper ation reception operation 0 0 does not output parity bit. reception without parity 0 1 outputs 0 parity. reception as 0 parity note 1 0 outputs odd parity. judges as odd parity. 1 1 outputs even parity. judges as even parity. cl0 specifies character length of transmit/receive data 0 character length of data = 7 bits 1 character length of data = 8 bits sl0 specifies number of stop bits of transmit data 0 number of stop bits = 1 1 number of stop bits = 2 note if ?reception as 0 parity? is selected, the parity is not judged. therefore, bit 2 (pe0) of asynchronous serial interface reception error status register 0 (asis0) is not set and the error interrupt does not occur. cautions 1. to start the transmission, set power0 to 1 and then set txe0 to 1. to stop the transmission, clear txe0 to 0, and then clear power0 to 0. 2. to start the reception, set power0 to 1 and th en set rxe0 to 1. to stop the reception, clear rxe0 to 0, and then clear power0 to 0. 3. set power0 to 1 and then set rxe0 to 1 wh ile a high level is input to the rxd0 pin. if power0 is set to 1 and rxe0 is set to 1 wh ile a low level is input, reception is started. 4. txe0 and rxe0 are synch ronized by the base clock (f xclk0 ) set by brgc0. to enable transmission or reception again, set txe0 or rxe0 to 1 at least two cl ocks of base clock after txe0 or rxe0 has been cleared to 0. if txe0 or rxe0 is set within two clocks of base clock, the transmission circuit or recepti on circuit may not be initialized. 5. set transmit data to t xs0 at least one base clock (f xclk0 ) after setting txe0 = 1. 6. clear the txe0 and rxe0 bits to 0 be fore rewriting the ps01, ps00, and cl0 bits. 7. make sure that txe0 = 0 when rewriting th e sl0 bit. reception is always performed with ?number of stop bits = 1?, and therefore, is not affected by the set value of the sl0 bit. 8. be sure to set bit 0 to 1. chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 312 (2) asynchronous serial interface recepti on error status register 0 (asis0) this register indicates an error status on completion of re ception by serial interface uart0. it includes three error flag bits (pe0, fe0, ove0). this register is read-only by an 8-bit memory manipulation instruction. reset signal generation, or clearing bit 7 (power0) or bi t 5 (rxe0) of asim0 to 0 clears this register to 00h. 00h is read when this register is read. if a recept ion error occurs, read asis0 and then read receive buffer register 0 (rxb0) to clear the error flag. figure 13-3. format of asynchronous serial inte rface reception error status register 0 (asis0) address: ff73h after reset: 00h r symbol 7 6 5 4 3 2 1 0 asis0 0 0 0 0 0 pe0 fe0 ove0 pe0 status flag indicating parity error 0 if power0 = 0 or rxe0 = 0, or if asis0 register is read. 1 if the parity of transmit data does not match the parity bit on completion of reception. fe0 status flag indicating framing error 0 if power0 = 0 or rxe0 = 0, or if asis0 register is read. 1 if the stop bit is not detected on completion of reception. ove0 status flag indicating overrun error 0 if power0 = 0 or rxe0 = 0, or if asis0 register is read. 1 if receive data is set to the rxb0 register and the next reception operation is completed before the data is read. cautions 1. the operation of the pe0 bit differs depending on the set values of the ps01 and ps00 bits of asynchronous serial interface operati on mode register 0 (asim0). 2. for the stop bit of the recei ve data, only the first stop bit is checked regardless of the number of stop bits. 3. if an overrun error occurs , the next receive data is not wr itten to receive buffer register 0 (rxb0) but discarded. 4. if data is read from asis0, a wait cycle is generated. do not read data from asis0 when the cpu is operating on the subsystem clock and th e peripheral hardware clock is stopped. for details, see chapter 34 cautions for wait. chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 313 (3) baud rate generator c ontrol register 0 (brgc0) this register selects the base clock of serial interf ace uart0 and the division value of the 5-bit counter. brgc0 can be set by an 8-bit memory manipulation instruction. reset signal generation sets this register to 1fh. figure 13-4. format of baud rate ge nerator control register 0 (brgc0) address: ff71h after reset: 1fh r/w symbol 7 6 5 4 3 2 1 0 brgc0 tps01 tps00 0 mdl04 mdl03 mdl02 mdl01 mdl00 base clock (f xclk0 ) selection note 1 tps01 tps00 f prs = 2 mhz f prs = 5 mhz f prs = 10 mhz f prs = 20 mhz 0 0 tm50 output note 2 0 1 f prs /2 1 mhz 2.5 mhz 5 mhz 10 mhz 1 0 f prs /2 3 250 khz 625 khz 1.25 mhz 2.5 mhz 1 1 f prs /2 5 62.5 khz 156.25 khz 312.5 khz 625 khz mdl04 mdl03 mdl02 mdl01 mdl00 k selection of 5-bit counter output clock 0 0 setting prohibited 0 1 0 0 0 8 f xclk0 /8 0 1 0 0 1 9 f xclk0 /9 0 1 0 1 0 10 f xclk0 /10 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 1 1 0 1 0 26 f xclk0 /26 1 1 0 1 1 27 f xclk0 /27 1 1 1 0 0 28 f xclk0 /28 1 1 1 0 1 29 f xclk0 /29 1 1 1 1 0 30 f xclk0 /30 1 1 1 1 1 31 f xclk0 /31 note 1. if the peripheral hardware clock (f prs ) operates on the high-speed system clock (f xh ) (xsel = 1), the f prs operating frequency varies depending on the supply voltage. ? v dd = 4.0 to 5.5 v: f prs 20 mhz ? v dd = 2.7 to 4.0 v: f prs 10 mhz ? v dd = 1.8 to 2.7 v: f prs 5 mhz (standard and (a) grade products only) chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 314 note 2. note the following points when selecting the tm50 output as the base clock. ? mode in which the count clock is cleared and started upon a match of tm50 and cr50 (tmc506 = 0) start the operation of 8-bit ti mer/event counter 50 first and then enable the timer f/f inversion operation (tmc501 = 1). ? pwm mode (tmc506 = 1) start the operation of 8-bit timer/event counter 50 fi rst and then set the count clock to make the duty = 50%. it is not necessary to enable (toe50 = 1) to50 output in any mode. cautions 1. make sure that bit 6 (txe0) and bit 5 (rxe0) of the asim0 register = 0 when rewriting the mdl04 to mdl00 bits. 2. the baud rate value is the output clock of the 5-bit c ounter divided by 2. remarks 1. f xclk0 : frequency of base clock selected by the tps01 and tps00 bits 2. f prs : peripheral hardware clock frequency 3. k: value set by the mdl04 to md l00 bits (k = 8, 9, 10, ..., 31) 4. : don?t care 5. tmc506: bit 6 of 8-bit timer mode control register 50 (tmc50) tmc501: bit 1 of tmc50 (4) port mode register 1 (pm1) this register sets port 1 input/output in 1-bit units. when using the p10/txd0/sck10 pin for serial interface dat a output, clear pm10 to 0 and set the output latch of p10 to 1. when using the p11/rxd0/si10 pin for seri al interface data input, set pm11 to 1. the output latch of p11 at this time may be 0 or 1. pm1 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to ffh. figure 13-5. format of port mode register 1 (pm1) address: ff21h after reset: ffh r/w symbol 7 6 5 4 3 2 1 0 pm1 pm17 pm16 pm15 pm14 pm13 pm12 pm11 pm10 pm1n p1n pin i/o mode selection (n = 0 to 7) 0 output mode (output buffer on) 1 input mode (output buffer off) chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 315 13.4 operation of serial interface uart0 serial interface uart0 has the following two modes. ? operation stop mode ? asynchronous serial interface (uart) mode 13.4.1 operation stop mode in this mode, serial communication cannot be executed, thus reducing the power consumption. in addition, the pins can be used as ordinary port pins in this mode. to se t the operation stop mode, clear bits 7, 6, and 5 (power0, txe0, and rxe0) of asim0 to 0. (1) register used the operation stop mode is set by asynchronous serial interface operation mode register 0 (asim0). asim0 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to 01h. address: ff70h after reset: 01h r/w symbol <7> <6> <5> 4 3 2 1 0 asim0 power0 txe0 rxe0 ps01 ps00 cl0 sl0 1 power0 enables/disables operati on of internal operation clock 0 note 1 disables operation of the internal operation clock (fixes the clock to low level) and asynchronously resets the internal circuit note 2 . txe0 enables/disables transmission 0 disables transmission (synchronously resets th e transmission circuit). rxe0 enables/disables reception 0 disables reception (synchronous ly resets the reception circuit). notes 1. the input from the r x d0 pin is fixed to high level when power0 = 0. 2. asynchronous serial interface reception error status register 0 (asis0), transmit shift register 0 (txs0), and receive buffer register 0 (rxb0) are reset. caution clear power0 to 0 after clearing txe0 and rxe0 to 0 to set the operation stop mode. to start the communication, set power0 to 1, and then set txe0 or rxe0 to 1. remark to use the rxd0/si10/p11 and txd0/sck10/p 10 pins as general-purpose port pins, see chapter 4 port functions . chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 316 13.4.2 asynchronous serial interface (uart) mode in this mode, 1-byte data is transmitted/received following a start bit, and a full-duplex operation can be performed. a dedicated uart baud rate generator is incorporated, so that communication can be executed at a wide range of baud rates. (1) registers used ? asynchronous serial interface operation mode register 0 (asim0) ? asynchronous serial interface recept ion error status register 0 (asis0) ? baud rate generator control register 0 (brgc0) ? port mode register 1 (pm1) ? port register 1 (p1) the basic procedure of setting an operatio n in the uart mode is as follows. <1> set the brgc0 register (see figure 13-4 ). <2> set bits 1 to 4 (sl0, cl0, ps00, and ps01) of the asim0 register (see figure 13-2 ). <3> set bit 7 (power0) of the asim0 register to 1. <4> set bit 6 (txe0) of the asim0 register to 1. transmission is enabled. set bit 5 (rxe0) of the asim0 register to 1. reception is enabled. <5> write data to the txs0 register. data transmission is started. caution take relationship with the other party of communication when setting the port mode register and port register. the relationship between the register settings and pins is shown below. table 13-2. relationship between register settings and pins pin function power0 txe0 rxe0 pm10 p10 pm11 p11 uart0 operation txd0/sck10/p10 rxd0/si10/p11 0 0 0 note note note note stop sck10/p10 si10/p11 0 1 note note 1 reception sck10/p10 rxd0 1 0 0 1 note note transmission txd0 si10/p11 1 1 1 0 1 1 transmission/ reception txd0 rxd0 note can be set as port function or serial interface csi10. remark : don?t care power0: bit 7 of asynchronous serial interface operation mode register 0 (asim0) txe0: bit 6 of asim0 rxe0: bit 5 of asim0 pm1 : port mode register p1 : port output latch chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 317 (2) communication operation (a) format and waveform example of normal transmit/receive data figures 13-6 and 13-7 show the format and waveform example of the normal transmit/receive data. figure 13-6. format of normal uart transmit/receive data start bit parity bit d0 d1 d2 d3 d4 1 data frame character bits d5 d6 d7 stop bit one data frame consists of the following bits. ? start bit ... 1 bit ? character bits ... 7 or 8 bits (lsb first) ? parity bit ... even parity, odd parity, 0 parity, or no parity ? stop bit ... 1 or 2 bits the character bit length, parity, and stop bit length in one data frame are specified by asynchronous serial interface operation mode register 0 (asim0). figure 13-7. example of normal uart transmit/receive data waveform 1. data length: 8 bits, parity: even pari ty, stop bit: 1 bit, communication data: 55h 1 data frame start d0 d1 d2 d3 d4 d5 d6 d7 parity stop 2. data length: 7 bits, parity: odd parity , stop bit: 2 bits, communication data: 36h 1 data frame start d0 d1 d2 d3 d4 d5 d6 parity stop stop 3. data length: 8 bits, pa rity: none, stop bit: 1 bit, communication data: 87h 1 data frame start d0 d1 d2 d3 d4 d5 d6 d7 stop chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 318 (b) parity types and operation the parity bit is used to detect a bit error in communicati on data. usually, the same type of parity bit is used on both the transmission and reception sides. with even parity and odd parity, a 1-bit (odd number) error can be detected. with zero parity and no parity, an error cannot be detected. (i) even parity ? transmission transmit data, including the parity bit, is controlled so that the number of bits that are ?1? is even. the value of the parity bit is as follows. if transmit data has an odd number of bits that are ?1?: 1 if transmit data has an even number of bits that are ?1?: 0 ? reception the number of bits that are ?1? in the receive dat a, including the parity bit, is counted. if it is odd, a parity error occurs. (ii) odd parity ? transmission unlike even parity, transmit data, including the parity bit, is controlled so that the number of bits that are ?1? is odd. if transmit data has an odd number of bits that are ?1?: 0 if transmit data has an even number of bits that are ?1?: 1 ? reception the number of bits that are ?1? in the receive data, including the parit y bit, is counted. if it is even, a parity error occurs. (iii) 0 parity the parity bit is cleared to 0 when data is transmitted, regardless of the transmit data. the parity bit is not detected when the data is received. therefore, a parity error does not occur regardless of whether the parity bit is ?0? or ?1?. (iv) no parity no parity bit is appended to the transmit data. reception is performed assuming t hat there is no parity bit when data is received. because there is no parity bit, a parity error does not occur. chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 319 (c) transmission if bit 7 (power0) of asynchronous serial interface op eration mode register 0 (asim0) is set to 1 and bit 6 (txe0) of asim0 is then set to 1, transmission is enabl ed. transmission can be star ted by writing transmit data to transmit shift register 0 (txs0). the start bit, parity bit, and stop bit are automatically appended to the data. when transmission is started, the start bit is output from the t x d0 pin, and the transmit data is output followed by the rest of the data in order starting from the lsb. when tr ansmission is completed, the parity and stop bits set by asim0 are appended and a transmi ssion completion interrupt request (intst0) is generated. transmission is stopped until the data to be transmitted next is written to txs0. figure 13-8 shows the timing of the transmission comp letion interrupt request (intst0). this interrupt occurs as soon as the last stop bit has been output. caution after transmit data is written to txs0, do not write the next transmit data before the transmission completion interrupt signal (intst0) is generated. figure 13-8. transmission comple tion interrupt request timing 1. stop bit length: 1 intst0 d0 start d1 d2 d6 d7 stop t x d0 (output) parity 2. stop bit length: 2 t x d0 (output) intst0 d0 start d1 d2 d6 d7 parity stop chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 320 (d) reception reception is enabled and the r x d0 pin input is sampled when bit 7 (power0) of asynchronous serial interface operation mode register 0 (asim0) is set to 1 and then bit 5 (rxe0) of asim0 is set to 1. the 5-bit counter of the baud rate generator st arts counting when the falling edge of the r x d0 pin input is detected. when the set value of baud rate generator control register 0 (brgc0) has been counted, the r x d0 pin input is sampled again ( in figure 13-9). if the r x d0 pin is low level at this time, it is recognized as a start bit. when the start bit is detected, recept ion is started, and serial data is sequentially stored in receive shift register 0 (rxs0) at the set baud rate. when the st op bit has been received, the reception completion interrupt (intsr0) is generated and t he data of rxs0 is written to receive buffer register 0 (rxb0). if an overrun error (ove0) occurs, however, the receive data is not written to rxb0. even if a parity error (pe0) occurs while reception is in progress, reception continues to the reception position of the stop bit, and an recepti on error interrupt (intsr0) is generat ed after completion of reception. intsr0 occurs upon completion of reception and in case of a reception error. figure 13-9. reception completi on interrupt request timing r x d0 (input) intsr0 start d0 d1 d2 d3 d4 d5 d6 d7 parity stop rxb0 cautions 1. if a reception erro r occurs, read asynchronous serial interface receptio n error status register 0 (asis0) and then read receive buffe r register 0 (rxb0) to clear the error flag. otherwise, an overrun error will occur when the next data is received, and the reception error status will persist. 2. reception is always performed with the ?num ber of stop bits = 1? . the second stop bit is ignored. chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 321 (e) reception error three types of errors may occur during reception: a parity error, framing error, or ov errun error. if the error flag of asynchronous serial interface reception error st atus register 0 (asis0) is set as a result of data reception, a reception error inte rrupt (intsr0) is generated. which error has occurred during reception can be identifi ed by reading the contents of asis0 in the reception error interrupt (intsr0) servicing (see figure 13-3 ). the contents of asis0 are cleared to 0 when asis0 is read. table 13-3. cause of reception error reception error cause parity error the parity specifi ed for transmission does not match the parity of the receive data. framing error stop bit is not detected. overrun error reception of the next data is completed before data is read from receive buffer register 0 (rxb0). (f) noise filter of receive data the r x d0 signal is sampled using the base clock output by the prescaler block. if two sampled values are the same, the output of t he match detector changes, and the data is sampled as input data. because the circuit is configured as shown in figure 13- 10, the internal processing of the reception operation is delayed by two clocks from the external signal status. figure 13-10. noise filter circuit internal signal b internal signal a match detector in base clock r x d0/si10/p11 q in ld_en q chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 322 13.4.3 dedicated baud rate generator the dedicated baud rate generator consis ts of a source clock selector and a 5-bit programmable counter, and generates a serial clock for transmission/reception of uart0. separate 5-bit counters are provided for transmission and reception. (1) configuration of ba ud rate generator ? base clock the clock selected by bits 7 and 6 (tps01 and tps00) of baud rate generator control register 0 (brgc0) is supplied to each module when bit 7 (power0) of asyn chronous serial interface operation mode register 0 (asim0) is 1. this clock is called the base clock and its frequency is called f xclk0 . the base clock is fixed to low level when power0 = 0. ? transmission counter this counter stops operation, clear ed to 0, when bit 7 (power0) or bit 6 (txe0) of asynchronous serial interface operation mode register 0 (asim0) is 0. it starts counting when power0 = 1 and txe0 = 1. the counter is cleared to 0 when the first data transmi tted is written to transmit shift register 0 (txs0). ? reception counter this counter stops operation, clear ed to 0, when bit 7 (power0) or bit 5 (rxe0) of asynchronous serial interface operation mode register 0 (asim0) is 0. it starts counting when the start bit has been detected. the counter stops operation after one frame has been received, until the next start bit is detected. figure 13-11. configuration of baud rate generator f xclk0 selector power0 5-bit counter match detector baud rate brgc0: mdl04 to mdl00 1/2 power0, txe0 (or rxe0) brgc0: tps01, tps00 8-bit timer/ event counter 50 output f prs /2 5 f prs /2 f prs /2 3 baud rate generator remark power0: bit 7 of asynchronous serial interface operation mode register 0 (asim0) txe0: bit 6 of asim0 rxe0: bit 5 of asim0 brgc0: baud rate generator control register 0 chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 323 (2) generation of serial clock a serial clock to be generated can be specified by usi ng baud rate generator control register 0 (brgc0). select the clock to be input to the 5-bit counter by using bits 7 and 6 (tps01 and tps00) of brgc0. bits 4 to 0 (mdl04 to mdl00) of brgc0 can be used to select the division value (f xclk0 /8 to f xclk0 /31) of the 5-bit counter. 13.4.4 calculation of baud rate (1) baud rate calculation expression the baud rate can be calculated by the following expression. ? baud rate = [bps] f xclk0 : frequency of base clock selected by the tps 01 and tps00 bits of the brgc0 register k: value set by the mdl04 to mdl00 bits of t he brgc0 register (k = 8, 9, 10, ..., 31) table 13-4. set value of tps01 and tps00 base clock (f xclk0 ) selection note 1 tps01 tps00 f prs = 2 mhz f prs = 5 mhz f prs = 10 mhz f prs = 20 mhz 0 0 tm50 output note 2 0 1 f prs /2 1 mhz 2.5 mhz 5 mhz 10 mhz 1 0 f prs /2 3 250 khz 625 khz 1.25 mhz 2.5 mhz 1 1 f prs /2 5 62.5 khz 156.25 khz 312.5 khz 625 khz notes 1. if the peripheral hardware clock (f prs ) operates on the high-speed system clock (f xh ) (xsel = 1), the f prs operating frequency varies depending on the supply voltage. ? v dd = 4.0 to 5.5 v: f prs 20 mhz ? v dd = 2.7 to 4.0 v: f prs 10 mhz ? v dd = 1.8 to 2.7 v: f prs 5 mhz (standard and (a) grade products only) 2. note the following points when sele cting the tm50 output as the base clock. ? mode in which the count clock is cleared and started upon a match of tm50 and cr50 (tmc506 = 0) start the operation of 8-bit timer/event counte r 50 first and then enable the timer f/f inversion operation (tmc501 = 1). ? pwm mode (tmc506 = 1) start the operation of 8-bit timer/ event counter 50 first and then set t he count clock to make the duty = 50%. it is not necessary to enable (toe50 = 1) to50 output in any mode. (2) error of baud rate the baud rate error can be calculated by the following expression. ? error (%) = ? 1 100 [%] cautions 1. keep the baud rate error during transmission to within th e permissible error range at the reception destination. 2. make sure that the baud rate error dur ing reception satisfies th e range shown in (4) permissible baud rate ra nge during reception. f xclk0 2 k actual baud rate (baud rate with error) desired baud rate (correct baud rate) chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 324 example: frequency of base clock = 2.5 mhz = 2,500,000 hz set value of mdl04 to mdl00 bits of brgc0 register = 10000b (k = 16) target baud rate = 76,800 bps baud rate = 2.5 m/(2 16) = 2,500,000/(2 16) = 78,125 [bps] error = (78,125/76,800 ? 1) 100 = 1.725 [%] (3) example of setting baud rate table 13-5. set data of baud rate generator f prs = 2.0 mhz f prs = 5.0 mhz f prs = 10.0 mhz f prs = 20.0 mhz baud rate [bps] tps01, tps00 k calculated value err [%] tps01, tps00 k calculated value err [%] tps01, tps00 k calculated value err [%] tps01, tps00 k calculated value err [%] 4800 2h 26 4808 0.16 3h 16 4883 1.73 ? ? ? ? ? ? ? ? 9600 2h 13 9615 0.16 3h 8 9766 1.73 3h 16 9766 1.73 ? ? ? ? 10400 2h 12 10417 0.16 2h 30 10417 0.16 3h 15 10417 0.16 3h 30 10417 0.16 19200 1h 26 19231 0.16 2h 16 19531 1.73 3h 8 19531 1.73 3h 16 19531 1.73 24000 1h 21 23810 ? 0.79 2h 13 24038 0.16 2h 26 24038 0.16 3h 13 24038 0.16 31250 1h 16 31250 0 2h 10 31250 0 2h 20 31250 0 3h 10 31250 0 33660 1h 15 33333 ? 0.79 2h 9 34722 3.34 2h 18 34722 3.34 3h 9 34722 3.34 38400 1h 13 38462 0.16 2h 8 39063 1.73 2h 16 39063 1.73 3h 8 39063 1.73 56000 1h 9 55556 ? 0.79 1h 22 56818 1.46 2h 11 56818 1.46 2h 22 56818 1.46 62500 1h 8 62500 0 1h 20 62500 0 2h 10 62500 0 2h 20 62500 0 76800 ? ? ? ? 1h 16 78125 1.73 2h 8 78125 1.73 2h 16 78125 1.73 115200 ? ? ? ? 1h 11 113636 ? 1.36 1h 22 113636 ? 1.36 2h 11 113636 ? 1.36 153600 ? ? ? ? 1h 8 156250 1.73 1h 16 156250 1.73 2h 8 156250 1.73 312500 ? ? ? ? ? ? ? ? 1h 8 312500 0 1h 16 312500 0 625000 ? ? ? ? ? ? ? ? ? ? ? ? 1h 8 625000 0 remark tps01, tps00: bits 7 and 6 of baud rate generator control register 0 (brgc0) (setting of base clock (f xclk0 )) k: value set by the mdl04 to mdl00 bits of brgc0 (k = 8, 9, 10, ..., 31) f prs : peripheral hardware clock frequency err: baud rate error chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 325 (4) permissible baud rate range during reception the permissible error from the baud rate at the trans mission destination during reception is shown below. caution make sure that the baud rate error during reception is within the permissible error range, by using the calculation expression shown below. figure 13-12. permissible baud rate range during reception fl 1 data frame (11 fl) flmin flmax data frame length of uart0 start bit bit 0 bit 1 bit 7 parity bit minimum permissible data frame length maximum permissible data frame length stop bit start bit bit 0 bit 1 bit 7 parity bit latch timing stop bit start bit bit 0 bit 1 bit 7 parity bit stop bit as shown in figure 13-12, the latch timing of the re ceive data is determined by t he counter set by baud rate generator control register 0 (brgc0) a fter the start bit has been detected. if the last data (stop bit) meets this latch timing, the data can be correctly received. assuming that 11-bit data is received, the theoretical values can be calculated as follows. fl = (brate) ? 1 brate: baud rate of uart0 k: set value of brgc0 fl: 1-bit data length margin of latch timing: 2 clocks chapter 13 serial interface uart0 user?s manual u17336ej5v0ud 326 minimum permissible data frame length: flmin = 11 fl ? fl = fl therefore, the maximum receivable baud rate at the transmission destination is as follows. brmax = (flmin/11) ? 1 = brate similarly, the maximum permissible data fr ame length can be calculated as follows. 10 k + 2 21k ? 2 11 2 k 2 k flmax = fl 11 therefore, the minimum receivable baud rate at the transmission destination is as follows. brmin = (flmax/11) ? 1 = brate the permissible baud rate error between uart0 and the transmission destination can be calculated from the above minimum and maximum baud rate expressions, as follows. table 13-6. maximum/minimum permissible baud rate error division ratio (k) maximum perm issible baud rate error minimu m permissible baud rate error 8 +3.53% ? 3.61% 16 +4.14% ? 4.19% 24 +4.34% ? 4.38% 31 +4.44% ? 4.47% remarks 1. the permissible error of reception depends on t he number of bits in one frame, input clock frequency, and division ratio (k). the higher t he input clock frequency and the higher the division ratio (k), the higher the permissible error. 2. k: set value of brgc0 k ? 2 2k 21k + 2 2k 22k 21k + 2 flmax = 11 fl ? fl = fl 21k ? 2 20k 20k 21k ? 2 user?s manual u17336ej5v0ud 327 chapter 14 serial interface uart6 14.1 functions of serial interface uart6 serial interface uart6 has the following two modes. (1) operation stop mode this mode is used when serial communication is not executed and can enable a reduction in the power consumption. for details, see 14.4.1 operation stop mode . (2) asynchronous serial interface (uart) mode this mode supports the lin (local interconnect network) -bus. the functions of this mode are outlined below. for details, see 14.4.2 asynchronous seri al interface (uart) mode and 14.4.3 dedicated baud rate generator . ? maximum transfer rate: 625 kbps ? two-pin configuration t x d6: transmit data output pin r x d6: receive data input pin ? data length of communication data can be selected from 7 or 8 bits. ? dedicated internal 8-bit baud rate generator allowing any baud rate to be set ? transmission and reception can be performe d independently (full duplex operation). ? msb- or lsb-first communication selectable ? inverted transmission operation ? sync break field transmission from 13 to 20 bits ? more than 11 bits can be identified for sync break field reception (sbf reception flag provided). cautions 1. the t x d6 output inversion function inverts only th e transmission side a nd not the reception side. to use this f unction, the reception side must be ready for reception of inverted data. 2. if clock supply to serial interface uart6 is not stopped (e .g., in the halt mode), normal operation continues. if clock supply to serial interface uart6 is stopped (e.g., in the stop mode), each register stops operating, and hold s the value immediatel y before clock supply was stopped. the t x d6 pin also holds the value imme diately before clock supply was stopped and outputs it. however, the operati on is not guaranteed after clock supply is resumed. therefore, reset the circuit so th at power6 = 0, rxe6 = 0, and txe6 = 0. 3. set power6 = 1 and then set txe6 = 1 (tr ansmission) or rxe6 = 1 (reception) to start communication. 4. txe6 and rxe6 are sync hronized by the base clock (f xclk6 ) set by cksr6. to enable transmission or reception again, set txe6 or r xe6 to 1 at least two clocks of the base clock after txe6 or rxe6 has been cleared to 0. if txe6 or rxe6 is set within two clocks of the base clock, the transmission circuit or reception circui t may not be initialized. 5. set transmit data to txb6 at least one base clock (f xclk6 ) after setting txe6 = 1. 6. if data is continuously tr ansmitted, the communicat ion timing from the stop bit to the next start bit is extended two operating clocks of the macro. however, th is does not affect the result of communication because the reception side initializ es the timing when it has detected a start bit. do no t use the continuous transmissi on function if the interface is used in lin communication operation. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 328 remark lin stands for local interconnect network and is a low-speed (1 to 20 kbps) serial communication protocol intended to aid the cost reduction of an automotive network. lin communication is single-master communication, and up to 15 slaves can be connected to one master. the lin slaves are used to contro l the switches, actuator s, and sensors, and thes e are connected to the lin master via the lin network. normally, the lin master is connected to a network such as can (controller area network). in addition, the lin bus uses a single-wire method and is connected to the nodes via a transceiver that complies with iso9141. in the lin protocol, the master tr ansmits a frame with baud rate information and the slave receives it and corrects the baud rate error. theref ore, communication is possible when the baud rate error in the slave is 15% or less. figures 14-1 and 14-2 outline the transmissi on and reception operations of lin. figure 14-1. lin transmission operation lin bus wakeup signal frame 8 bits note 1 55h transmission data transmission data transmission data transmission data transmission 13-bit note 2 sbf transmission sync break field sync field identifier field data field data field checksum field tx6 (output) intst6 note 3 notes 1. the wakeup signal frame is substituted by 80h transmission in the 8-bit mode. 2. the sync break field is output by har dware. the output width is the bit length set by bits 4 to 2 (sbl62 to sbl60) of asynchronous serial inte rface control register 6 (asicl6) (see 14.4.2 (2) (h) sbf transmission ). 3. intst6 is output on completion of each transmissi on. it is also output when sbf is transmitted. remark the interval between each field is controlled by software. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 329 figure 14-2. lin reception operation lin bus 13-bit sbf reception sf reception id reception data reception data reception data reception wakeup signal frame sync break field sync field identifier field data field data field checksum field r x d6 (input) reception interrupt (intsr6) edge detection (intp0) capture timer disable enable disable enable <1> <2> <3> <4> <5> reception processing is as follows. <1> the wakeup signal is detected at the edge of t he pin, and enables uart6 and sets the sbf reception mode. <2> reception continues until the stop bi t is detected. when an sbf with low- level data of 11 bits or more has been detected, it is assum ed that sbf reception has been complet ed correctly, and an interrupt signal is output. if an sbf with low-level dat a of less than 11 bits has been detect ed, it is assumed that an sbf reception error has occurred. the interrupt signal is not output and the sbf reception mode is restored. <3> if sbf reception has been completed correctly, an interru pt signal is output. start 16-bit timer/event counter 00 by the sbf reception end interrupt servicing and meas ure the bit interval (pulse width) of the sync field (see 6.4.8 pulse width measurement operation ). detection of errors ove6, pe6, and fe6 is suppressed, and error detection proc essing of uart communication and dat a transfer of the shift register and rxb6 is not performed. the shift register holds the reset value ffh. <4> calculate the baud rate error from the bit interval of the sync field, disable ua rt6 after sf reception, and then re-set baud rate generator control register 6 (brgc6). <5> distinguish the checksum field by software. also perform processing by software to initialize uart6 after reception of the checksum field and to set the sbf reception mode again. figure 14-3 shows the port configurat ion for lin reception operation. the wakeup signal transmitted from the lin master is received by detecting the edge of the external interrupt (intp0). the length of the sync field transmitted from the lin master can be measured using the external event capture operation of 16-bit timer/event counte r 00, and the baud rate error can be calculated. the input source of t he reception port input (r x d6) can be input to the external interrupt (intp0) and 16-bit timer/event counter 00 by port input swit ch control (isc0/isc1), without connecting r x d6 and intp0/ti000 externally. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 330 figure 14-3. port configurati on for lin reception operation rxd6 input intp0 input ti000 input p14/rxd6 p120/intp0/exlvi p00/ti000 port input switch control (isc0) chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 331 14.2 configuration of serial interface uart6 serial interface uart6 includes the following hardware. table 14-1. configurati on of serial interface uart6 item configuration registers receive buffer register 6 (rxb6) receive shift register 6 (rxs6) transmit buffer register 6 (txb6) transmit shift register 6 (txs6) control registers asynchronous serial interface o peration mode register 6 (asim6) asynchronous serial interface recepti on error status register 6 (asis6) asynchronous serial interface transm ission status register 6 (asif6) clock selection register 6 (cksr6) baud rate generator control register 6 (brgc6) asynchronous serial interface control register 6 (asicl6) input switch control register (isc) port mode register 1 (pm1) port register 1 (p1) chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 332 figure 14-4. block diagram of serial interface uart6 internal bus asynchronous serial interface control register 6 (asicl6) transmit buffer register 6 (txb6) transmit shift register 6 (txs6) t x d6/ p13 intst6 baud rate generator asynchronous serial interface control register 6 (asicl6) reception control receive shift register 6 (rxs6) receive buffer register 6 (rxb6) r x d6/ p14 ti000, intp0 note intsr6 baud rate generator filter intsre6 asynchronous serial interface reception error status register 6 (asis6) asynchronous serial interface operation mode register 6 (asim6) asynchronous serial interface transmission status register 6 (asif6) transmission control registers f prs f prs /2 f prs /2 2 f prs /2 3 f prs /2 4 f prs /2 5 f prs /2 6 f prs /2 7 f prs /2 8 f prs /2 9 f prs /2 10 8-bit timer/ event counter 50 output 8 reception unit transmission unit clock selection register 6 (cksr6) baud rate generator control register 6 (brgc6) output latch (p13) pm13 8 selector f xclk6 note selectable with input switch control register (isc). chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 333 (1) receive buffer register 6 (rxb6) this 8-bit register stores parallel data conv erted by receive shift register 6 (rxs6). each time 1 byte of data has been received, new receive data is transferred to this register from rxs6. if the data length is set to 7 bits, data is transferred as follows. ? in lsb-first reception, the receive data is transferred to bits 0 to 6 of rxb6 and the msb of rxb6 is always 0. ? in msb-first reception, the receive data is transferred to bits 1 to 7 of rxb6 and the lsb of rxb6 is always 0. if an overrun error (ove6) occurs, the rece ive data is not transferred to rxb6. rxb6 can be read by an 8-bit memory manipulation inst ruction. no data can be written to this register. reset signal generation sets this register to ffh. (2) receive shift register 6 (rxs6) this register converts the serial data input to the r x d6 pin into parallel data. rxs6 cannot be directly manipulated by a program. (3) transmit buffer register 6 (txb6) this buffer register is used to set transmit data. tr ansmission is started when data is written to txb6. this register can be read or written by an 8-bit memory manipulation instruction. reset signal generation sets this register to ffh. cautions 1. do not write data to txb6 when bi t 1 (txbf6) of asynchronous serial interface transmission status register 6 (asif6) is 1. 2. do not refresh (write the same value to) txb6 by software during a communication operation (when bits 7 and 6 (power6, txe6 ) of asynchronous serial interface operation mode register 6 (asim6) are 1 or when bits 7 and 5 (power6, rxe6) of asim6 are 1). 3. set transmit data to txb6 at least one base clock (f xclk6 ) after setting txe6 = 1. (4) transmit shift register 6 (txs6) this register transmits the data transferred from txb6 from the t x d6 pin as serial data. data is transferred from txb6 immediately after txb6 is written for the first tr ansmission, or immediately before intst6 occurs after one frame was transmitted for continuous transmission. da ta is transferred from txb6 and transmitted from the t x d6 pin at the falling edge of the base clock. txs6 cannot be directly manipulated by a program. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 334 14.3 registers controlling serial interface uart6 serial interface uart6 is controlle d by the following nine registers. ? asynchronous serial interface operation mode register 6 (asim6) ? asynchronous serial interface recept ion error status register 6 (asis6) ? asynchronous serial interface transmission status register 6 (asif6) ? clock selection register 6 (cksr6) ? baud rate generator control register 6 (brgc6) ? asynchronous serial interface control register 6 (asicl6) ? input switch control register (isc) ? port mode register 1 (pm1) ? port register 1 (p1) (1) asynchronous serial interface ope ration mode register 6 (asim6) this 8-bit register controls the serial comm unication operations of serial interface uart6. this register can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to 01h. remark asim6 can be refreshed (the same value is wr itten) by software during a communication operation (when bits 7 and 6 (power6, txe6) of asim6 = 1 or bits 7 and 5 (power6, rxe6) of asim6 = 1). figure 14-5. format of asynchronous serial inte rface operation mode register 6 (asim6) (1/2) address: ff50h after reset: 01h r/w symbol <7> <6> <5> 4 3 2 1 0 asim6 power6 txe6 rxe6 ps61 ps60 cl6 sl6 isrm6 power6 enables/disables operati on of internal operation clock 0 note 1 disables operation of the internal operation clock (fixes the clock to low level) and asynchronously resets the internal circuit note 2 . 1 enables operation of t he internal operation clock txe6 enables/disables transmission 0 disables transmission (synchronously resets th e transmission circuit). 1 enables transmission rxe6 enables/disables reception 0 disables reception (synchronous ly resets the reception circuit). 1 enables reception notes 1. the output of the t x d6 pin goes high level and the input from the r x d6 pin is fixed to the high level when power6 = 0 during transmission. 2. asynchronous serial interface reception error status register 6 (asis6), asynchronous serial interface transmission status register 6 (asif6), bit 7 ( sbrf6) and bit 6 (sbrt6) of asynchronous serial interface control register 6 (asicl6), and receive buffer register 6 (rxb6) are reset. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 335 figure 14-5. format of asynchronous serial inte rface operation mode register 6 (asim6) (2/2) ps61 ps60 transmission oper ation reception operation 0 0 does not output parity bit. reception without parity 0 1 outputs 0 parity. reception as 0 parity note 1 0 outputs odd parity. judges as odd parity. 1 1 outputs even parity. judges as even parity. cl6 specifies character length of transmit/receive data 0 character length of data = 7 bits 1 character length of data = 8 bits sl6 specifies number of stop bits of transmit data 0 number of stop bits = 1 1 number of stop bits = 2 isrm6 enables/disables occurr ence of reception completion interrupt in case of error 0 ?intsre6? occurs in case of error (at this time, intsr6 does not occur). 1 ?intsr6? occurs in case of error (at this time, intsre6 does not occur). note if ?reception as 0 parity? is selected, the parity is not judged. therefore, bit 2 (pe6) of asynchronous serial interface reception error status register 6 (asis6) is not set and the error interrupt does not occur. cautions 1. to start the transmission, set power6 to 1 and then set txe6 to 1. to stop the transmission, clear txe6 to 0, and then clear power6 to 0. 2. to start the reception, set power6 to 1 and th en set rxe6 to 1. to stop the reception, clear rxe6 to 0, and then clear power6 to 0. 3. set power6 to 1 and then set rxe6 to 1 while a high level is input to the r x d6 pin. if power6 is set to 1 and rxe6 is set to 1 wh ile a low level is input, reception is started. 4. txe6 and rxe6 are synch ronized by the base clock (f xclk6 ) set by cksr6. to enable transmission or reception again, set txe6 or r xe6 to 1 at least two clocks of the base clock after txe6 or rxe6 has been cleared to 0. if txe6 or rxe6 is set within two clocks of the base clock, the transmission circuit or reception circui t may not be initialized. 5. set transmit data to txb6 at least one base clock (f xclk6 ) after setting txe6 = 1. 6. clear the txe6 and rxe6 bits to 0 be fore rewriting the ps61, ps60, and cl6 bits. 7. fix the ps61 and ps60 bits to 0 when used in lin communication operation. 8. clear txe6 to 0 before re writing the sl6 bit. reception is always performed with ?the number of stop bits = 1?, and therefore, is not affected by the set value of the sl6 bit. 9. make sure that rxe6 = 0 when rewriting the isrm6 bit. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 336 (2) asynchronous serial interface recepti on error status register 6 (asis6) this register indicates an error status on completion of re ception by serial interface uart6. it includes three error flag bits (pe6, fe6, ove6). this register is read-only by an 8-bit memory manipulation instruction. reset signal generation, or clearing bit 7 (power6) or bi t 5 (rxe6) of asim6 to 0 clears this register to 00h. 00h is read when this register is read. if a recept ion error occurs, read asis6 and then read receive buffer register 6 (rxb6) to clear the error flag. figure 14-6. format of asynchronous serial inte rface reception error status register 6 (asis6) address: ff53h after reset: 00h r symbol 7 6 5 4 3 2 1 0 asis6 0 0 0 0 0 pe6 fe6 ove6 pe6 status flag indicating parity error 0 if power6 = 0 or rxe6 = 0, or if asis6 register is read 1 if the parity of transmit data does not match the parity bit on completion of reception fe6 status flag indicating framing error 0 if power6 = 0 or rxe6 = 0, or if asis6 register is read 1 if the stop bit is not detected on completion of reception ove6 status flag indicating overrun error 0 if power6 = 0 or rxe6 = 0, or if asis6 register is read 1 if receive data is set to the rxb6 register and the next reception operation is completed before the data is read. cautions 1. the operation of the pe6 bit differs depending on the set values of the ps61 and ps60 bits of asynchronous serial interface operati on mode register 6 (asim6). 2. for the stop bit of the recei ve data, only the first stop bit is checked regardless of the number of stop bits. 3. if an overrun error occurs , the next receive data is not wr itten to receive buffer register 6 (rxb6) but discarded. 4. if data is read from asis6, a wait cycle is generated. do not read data from asis6 when the cpu is operating on the subsystem clock and th e peripheral hardware clock is stopped. for details, see chapter 34 cautions for wait. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 337 (3) asynchronous serial interface tran smission status register 6 (asif6) this register indicates the status of transmission by se rial interface uart6. it includes two status flag bits (txbf6 and txsf6). transmission can be continued without disruption even during an interrupt period, by writing the next data to the txb6 register after data has been transferred from the txb6 register to the txs6 register. this register is read-only by an 8-bit memory manipulation instruction. reset signal generation, or clearing bit 7 (power6) or bi t 6 (txe6) of asim6 to 0 clears this register to 00h. figure 14-7. format of asynchronous serial in terface transmission status register 6 (asif6) address: ff55h after reset: 00h r symbol 7 6 5 4 3 2 1 0 asif6 0 0 0 0 0 0 txbf6 txsf6 txbf6 transmit buffer data flag 0 if power6 = 0 or txe6 = 0, or if data is tr ansferred to transmit shift register 6 (txs6) 1 if data is written to transmit buffer register 6 (txb6) (if data exists in txb6) txsf6 transmit shift register data flag 0 if power6 = 0 or txe6 = 0, or if the next data is not transferred from transmit buffer register 6 (txb6) after completion of transfer 1 if data is transferred from transmit buffer regist er 6 (txb6) (if data transmi ssion is in progress) cautions 1. to transmit data conti nuously, write the first transmit data (first byte) to the txb6 register. be sure to check that the txbf6 fl ag is ?0?. if so, write the next transmit data (second byte) to the txb6 register. if data is written to th e txb6 register while the txbf6 flag is ?1?, the transmit data cannot be guaranteed. 2. to initialize the transmission unit upon comple tion of continuous transmission, be sure to check that the txsf6 flag is ?0 ? after generation of the tran smission completion interrupt, and then execute initializat ion. if initiali zation is executed while the txsf6 flag is ?1?, the transmit data cannot be guaranteed. (4) clock selection register 6 (cksr6) this register selects the base cl ock of serial interface uart6. cksr6 can be set by an 8-bit memory manipulation instruction. reset signal generation clears this register to 00h. remark cksr6 can be refreshed (the same value is written) by software during a communication operation (when bits 7 and 6 (power6, txe6) of asim6 = 1 or bits 7 and 5 (power6, rxe6) of asim6 = 1). chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 338 figure 14-8. format of clock selection register 6 (cksr6) address: ff56h after reset: 00h r/w symbol 7 6 5 4 3 2 1 0 cksr6 0 0 0 0 tps63 tps62 tps61 tps60 base clock (f xclk6 ) selection note 1 tps63 tps62 tps61 tps60 f prs = 2 mhz f prs = 5 mhz f prs = 10 mhz f prs = 20 mhz 0 0 0 0 f prs note 2 2 mhz 5 mhz 10 mhz 20 mhz 0 0 0 1 f prs /2 1 mhz 2.5 mhz 5 mhz 10 mhz 0 0 1 0 f prs /2 2 500 khz 1.25 mhz 2.5 mhz 5 mhz 0 0 1 1 f prs /2 3 250 khz 625 khz 1.25 mhz 2.5 mhz 0 1 0 0 f prs /2 4 125 khz 312.5 khz 625 khz 1.25 mhz 0 1 0 1 f prs /2 5 62.5 khz 156.25 khz 312.5 khz 625 khz 0 1 1 0 f prs /2 6 31.25 khz 78.13 khz 156.25 khz 312.5 khz 0 1 1 1 f prs /2 7 15.625 khz 39.06 khz 78.13 khz 156.25 khz 1 0 0 0 f prs /2 8 7.813 khz 19.53 khz 39.06 khz 78.13 khz 1 0 0 1 f prs /2 9 3.906 khz 9.77 khz 19.53 khz 39.06 khz 1 0 1 0 f prs /2 10 1.953 khz 4.88 khz 9.77 khz 19.53 khz 1 0 1 1 tm50 output note 3 other than above setting prohibited notes 1. if the peripheral hardware clock (f prs ) operates on the high-speed system clock (f xh ) (xsel = 1), the f prs operating frequency varies depending on the supply voltage. ? v dd = 4.0 to 5.5 v: f prs 20 mhz ? v dd = 2.7 to 4.0 v: f prs 10 mhz ? v dd = 1.8 to 2.7 v: f prs 5 mhz (standard and (a) grade products only) 2. if the peripheral hardware clock (f prs ) operates on the internal high-speed oscillation clock (f rh ) (xsel = 0), when 1.8 v v dd < 2.7 v, the setting of tps63 = tps 62 = tps61 = tps60 = 0 (base clock: f prs ) is prohibited. 3. note the following points when selecting the tm50 output as the base clock. ? mode in which the count clock is cleared and started upon a match of tm50 and cr50 (tmc506 = 0) start the operation of 8-bit timer/event counte r 50 first and then enable the timer f/f inversion operation (tmc501 = 1). ? pwm mode (tmc506 = 1) start the operation of 8-bit time r/event counter 50 first and then set the count clock to make the duty = 50%. it is not necessary to enable (toe50 = 1) to50 output in any mode. caution make sure power6 = 0 wh en rewriting tps63 to tps60. remarks 1. f prs : peripheral hardware clock frequency 2. tmc506: bit 6 of 8-bit timer mode control register 50 (tmc50) tmc501: bit 1 of tmc50 chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 339 (5) baud rate generator c ontrol register 6 (brgc6) this register sets the division value of t he 8-bit counter of serial interface uart6. brgc6 can be set by an 8-bit memory manipulation instruction. reset signal generation sets this register to ffh. remark brgc6 can be refreshed (the same value is written) by software during a communication operation (when bits 7 and 6 (power6, txe6) of asim6 = 1 or bits 7 and 5 (power6, rxe6) of asim6 = 1). figure 14-9. format of baud rate ge nerator control register 6 (brgc6) address: ff57h after reset: ffh r/w symbol 7 6 5 4 3 2 1 0 brgc6 mdl67 mdl66 mdl65 mdl64 mdl63 mdl62 mdl61 mdl60 mdl67 mdl66 mdl65 mdl64 mdl63 mdl62 mdl61 mdl60 k output clock selection of 8-bit counter 0 0 0 0 0 0 setting prohibited 0 0 0 0 0 1 0 0 4 f xclk6 /4 0 0 0 0 0 1 0 1 5 f xclk6 /5 0 0 0 0 0 1 1 0 6 f xclk6 /6 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 1 1 1 1 1 1 0 0 252 f xclk6 /252 1 1 1 1 1 1 0 1 253 f xclk6 /253 1 1 1 1 1 1 1 0 254 f xclk6 /254 1 1 1 1 1 1 1 1 255 f xclk6 /255 cautions 1. make sure that bit 6 (txe6) and bit 5 (rxe6) of the asim6 register = 0 when rewriting the mdl67 to mdl60 bits. 2. the baud rate is the output clo ck of the 8-bit counter divided by 2. remarks 1. f xclk6 : frequency of base clock selected by the t ps63 to tps60 bits of cksr6 register 2. k: value set by mdl67 to mdl60 bits (k = 4, 5, 6, ..., 255) 3. : don?t care chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 340 (6) asynchronous serial interface control register 6 (asicl6) this register controls the serial communicati on operations of serial interface uart6. asicl6 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to 16h. caution asicl6 can be refreshed (the same value is written) by software during a communication operation (when bits 7 and 6 (power6, txe6) of asim6 = 1 or bits 7 and 5 (power6, rxe6) of asim6 = 1). however, do not set both sbrt6 and sbtt6 to 1 by a refr esh operation during sbf reception (sbrt6 = 1) or sbf transmission (until intst6 occurs since sb tt6 has been set (1)), because it may re-trigger sbf r eception or sbf transmission. figure 14-10. format of asynchronous serial interface control register 6 (asicl6) (1/2) address: ff58h after reset: 16h r/w note symbol <7> <6> 5 4 3 2 1 0 asicl6 sbrf6 sbrt6 sbtt6 sbl62 sbl61 sbl60 dir6 txdlv6 sbrf6 sbf reception status flag 0 if power6 = 0 and rxe6 = 0 or if sbf reception has been completed correctly 1 sbf reception in progress sbrt6 sbf reception trigger 0 ? 1 sbf reception trigger sbtt6 sbf transmission trigger 0 ? 1 sbf transmission trigger note bit 7 is read-only. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 341 figure 14-10. format of asynchronous serial interface control register 6 (asicl6) (2/2) sbl62 sbl61 sbl60 sbf transmission output width control 1 0 1 sbf is output with 13-bit length. 1 1 0 sbf is output with 14-bit length. 1 1 1 sbf is output with 15-bit length. 0 0 0 sbf is output with 16-bit length. 0 0 1 sbf is output with 17-bit length. 0 1 0 sbf is output with 18-bit length. 0 1 1 sbf is output with 19-bit length. 1 0 0 sbf is output with 20-bit length. dir6 first-bit specification 0 msb 1 lsb txdlv6 enables/disables inverting t x d6 output 0 normal output of t x d6 1 inverted output of t x d6 cautions 1. in the case of an sbf reception error, the mode return s to the sbf reception mode. the status of the sbrf6 flag is held (1). 2. before setting the sbrt6 bit, make sure that bit 7 (power6) and bit 5 (rxe6) of asim6 = 1. after setting the sbrt6 bit to 1, do not clear it to 0 before sbf reception is completed (before an interrupt request signal is generated). 3. the read value of the sbrt6 bit is always 0. sbrt6 is auto matically cleared to 0 after sbf reception has been co rrectly completed. 4. before setting the sbtt6 bit to 1, make sure that bit 7 (pow er6) and bit 6 (txe6) of asim6 = 1. after setting the sbtt6 bit to 1, do not clear it to 0 before sbf transmission is completed (before an interrupt requ est signal is generated). 5. the read value of the sbtt6 bit is always 0. sbtt6 is automatically clear ed to 0 at the end of sbf transmission. 6. do not set the sbrt6 bit to 1 during reception, and do not set the sbtt6 bit to 1 during transmission. 7. before rewriting the dir6 and txdlv6 bits, clear the txe6 a nd rxe6 bits to 0. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 342 (7) input switch control register (isc) the input switch control regi ster (isc) is used to receive a status si gnal transmitted from the master during lin (local interconnect network) reception. the signal input from the p14/r x d6 pin is selected as the input sour ce of intp0 and ti000 when isc0 and isc1 are set to 1. this register can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation clears this register to 00h. figure 14-11. format of input s witch control register (isc) address: ff4fh after reset: 00h r/w symbol 7 6 5 4 3 2 1 0 isc 0 0 0 0 0 0 isc1 isc0 isc1 ti000 input source selection 0 ti000 (p00) 1 r x d6 (p14) isc0 intp0 input source selection 0 intp0 (p120) 1 r x d6 (p14) (8) port mode register 1 (pm1) this register sets port 1 input/output in 1-bit units. when using the p13/t x d6 pin for serial interface data output, clear pm 13 to 0 and set the output latch of p13 to 1. when using the p14/r x d6 pin for serial interface data input, set pm14 to 1. the output latch of p14 at this time may be 0 or 1. pm1 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to ffh. figure 14-12. format of port mode register 1 (pm1) address: ff21h after reset: ffh r/w symbol 7 6 5 4 3 2 1 0 pm1 pm17 pm16 pm15 pm14 pm13 pm12 pm11 pm10 pm1n p1n pin i/o mode selection (n = 0 to 7) 0 output mode (output buffer on) 1 input mode (output buffer off) chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 343 14.4 operation of serial interface uart6 serial interface uart6 has the following two modes. ? operation stop mode ? asynchronous serial interface (uart) mode 14.4.1 operation stop mode in this mode, serial communication cannot be executed; theref ore, the power consumption can be reduced. in addition, the pins can be used as ordinary po rt pins in this mode. to set the operation stop mode, clear bits 7, 6, and 5 (power6, txe6, and rxe6) of asim6 to 0. (1) register used the operation stop mode is set by asynchronous serial interface operation mode register 6 (asim6). asim6 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to 01h. address: ff50h after reset: 01h r/w symbol <7> <6> <5> 4 3 2 1 0 asim6 power6 txe6 rxe6 ps61 ps60 cl6 sl6 isrm6 power6 enables/disables operati on of internal operation clock 0 note 1 disables operation of the internal operation clock (fixes the clock to low level) and asynchronously resets the internal circuit note 2 . txe6 enables/disables transmission 0 disables transmission o peration (synchronously resets the transmission circuit). rxe6 enables/disables reception 0 disables reception (synchronous ly resets the reception circuit). notes 1. the output of the t x d6 pin goes high and the input from the r x d6 pin is fixed to high level when power6 = 0 during transmission. 2. asynchronous serial interface reception error status register 6 (asis6), asynchronous serial interface transmission status register 6 (asif6), bit 7 ( sbrf6) and bit 6 (sbrt6) of asynchronous serial interface control register 6 (asicl6), and receive buffer register 6 (rxb6) are reset. caution clear power6 to 0 after clearing t xe6 and rxe6 to 0 to stop the operation. to start the communication, set power6 to 1, and then set txe6 or rxe6 to 1. remark to use the r x d6/p14 and t x d6/p13 pins as general-purpose port pins, see chapter 4 port functions . chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 344 14.4.2 asynchronous serial interface (uart) mode in this mode, data of 1 byte is transmitted/received following a start bit, and a full-duplex operation can be performed. a dedicated uart baud rate generator is incorporated, so that communication can be executed at a wide range of baud rates. (1) registers used ? asynchronous serial interface operation mode register 6 (asim6) ? asynchronous serial interface recept ion error status register 6 (asis6) ? asynchronous serial interface transmission status register 6 (asif6) ? clock selection register 6 (cksr6) ? baud rate generator control register 6 (brgc6) ? asynchronous serial interface control register 6 (asicl6) ? input switch control register (isc) ? port mode register 1 (pm1) ? port register 1 (p1) the basic procedure of setting an operatio n in the uart mode is as follows. <1> set the cksr6 register (see figure 14-8 ). <2> set the brgc6 register (see figure 14-9 ). <3> set bits 0 to 4 (isrm6, sl6, cl6, ps60, ps61) of the asim6 register (see figure 14-5 ). <4> set bits 0 and 1 (txdlv6, di r6) of the asicl6 register (see figure 14-10 ). <5> set bit 7 (power6) of the asim6 register to 1. <6> set bit 6 (txe6) of the asim6 register to 1. transmission is enabled. set bit 5 (rxe6) of the asim6 register to 1. reception is enabled. <7> write data to transmit buffer register 6 (txb6). data transmission is started. caution take the relationship with the other pa rty of communication when setting the port mode register and port register. the relationship between the register settings and pins is shown below. table 14-2. relationship between register settings and pins pin function power6 txe6 rxe6 pm13 p13 pm14 p14 uart6 operation t x d6/p13 r x d6/p14 0 0 0 note note note note stop p13 p14 0 1 note note 1 reception p13 r x d6 1 0 0 1 note note transmission t x d6 p14 1 1 1 0 1 1 transmission/ reception t x d6 r x d6 note can be set as port function. remark : don?t care power6: bit 7 of asynchronous serial interface operation mode register 6 (asim6) txe6: bit 6 of asim6 rxe6: bit 5 of asim6 pm1 : port mode register p1 : port output latch chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 345 (2) communication operation (a) format and waveform example of normal transmit/receive data figures 14-13 and 14-14 show the format and waveform example of the normal transmit/receive data. figure 14-13. format of normal uart transmit/receive data 1. lsb-first transmission/reception start bit parity bit d0 d1 d2 d3 d4 1 data frame character bits d5 d6 d7 stop bit 2. msb-first transmission/reception start bit parity bit d7 d6 d5 d4 d3 1 data frame character bits d2 d1 d0 stop bit one data frame consists of the following bits. ? start bit ... 1 bit ? character bits ... 7 or 8 bits ? parity bit ... even parity, odd parity, 0 parity, or no parity ? stop bit ... 1 or 2 bits the character bit length, parity, and stop bit length in one data frame are specified by asynchronous serial interface operation mode register 6 (asim6). whether data is communicated with the lsb or msb first is specified by bit 1 (dir6) of asynchronous serial interface control register 6 (asicl6). whether the t x d6 pin outputs normal or inverted data is s pecified by bit 0 (txdlv6) of asicl6. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 346 figure 14-14. example of normal uart transmit/receive data waveform 1. data length: 8 bits, lsb first, parity: even parity, stop bit: 1 bit, communication data: 55h 1 data frame start d0 d1 d2 d3 d4 d5 d6 d7 parity stop 2. data length: 8 bits, msb first, parity: even parity, stop bit: 1 bit, communication data: 55h 1 data frame start d7 d6 d5 d4 d3 d2 d1 d0 parity stop 3. data length: 8 bits, msb first, parity: even parity, stop bit: 1 bit, communication data: 55h, t x d6 pin inverted output 1 data frame start d7 d6 d5 d4 d3 d2 d1 d0 parity stop 4. data length: 7 bits, lsb first, parity: o dd parity, stop bit: 2 bits, communication data: 36h 1 data frame start d0 d1 d2 d3 d4 d5 d6 parity stop stop 5. data length: 8 bits, lsb first, parity: none, stop bit: 1 bit, communication data: 87h 1 data frame start d0 d1 d2 d3 d4 d5 d6 d7 stop chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 347 (b) parity types and operation the parity bit is used to detect a bit error in communicati on data. usually, the same type of parity bit is used on both the transmission and reception sides. with even parity and odd parity, a 1-bit (odd number) error can be detected. with zero parity and no parity, an error cannot be detected. caution fix the ps61 and ps60 bits to 0 when the device is used in lin communication operation. (i) even parity ? transmission transmit data, including the parity bit, is controlled so that the number of bits that are ?1? is even. the value of the parity bit is as follows. if transmit data has an odd number of bits that are ?1?: 1 if transmit data has an even number of bits that are ?1?: 0 ? reception the number of bits that are ?1? in the receive dat a, including the parity bit, is counted. if it is odd, a parity error occurs. (ii) odd parity ? transmission unlike even parity, transmit data, including the parity bit, is controlled so that the number of bits that are ?1? is odd. if transmit data has an odd number of bits that are ?1?: 0 if transmit data has an even number of bits that are ?1?: 1 ? reception the number of bits that are ?1? in the receive data, including the parit y bit, is counted. if it is even, a parity error occurs. (iii) 0 parity the parity bit is cleared to 0 when data is transmitted, regardless of the transmit data. the parity bit is not detected when the data is received. therefore, a parity error does not occur regardless of whether the parity bit is ?0? or ?1?. (iv) no parity no parity bit is appended to the transmit data. reception is performed assuming t hat there is no parity bit when data is received. because there is no parity bit, a parity error does not occur. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 348 (c) normal transmission when bit 7 (power6) of asynchronous serial interface o peration mode register 6 (asim6) is set to 1 and bit 6 (txe6) of asim6 is then set to 1, transmission is enabl ed. transmission can be started by writing transmit data to transmit buffer register 6 (txb6 ). the start bit, parity bit, and stop bit are automatically appended to the data. when transmission is started, the data in txb6 is transferred to transmit sh ift register 6 (txs6). after that, the transmit data is sequentially output from txs6 to the t x d6 pin. when transmission is completed, the parity and stop bits set by asim6 are appended and a transmission completion interrupt request (intst6) is generated. transmission is stopped until the data to be transmitted next is written to txb6. figure 14-15 shows the timing of the transmission comp letion interrupt request (intst6). this interrupt occurs as soon as the last stop bit has been output. figure 14-15. normal transmission comp letion interrupt request timing 1. stop bit length: 1 intst6 d0 start d1 d2 d6 d7 stop t x d6 (output) parity 2. stop bit length: 2 t x d6 (output) intst6 d0 start d1 d2 d6 d7 parity stop chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 349 (d) continuous transmission the next transmit data can be written to transmit buffer re gister 6 (txb6) as soon as transmit shift register 6 (txs6) has started its shift operation. consequently, even while the intst6 interrupt is being serviced after transmission of one data frame, data can be continuously transmitted and an efficient communication rate can be realized. in addition, the txb6 register can be e fficiently written twice (2 bytes) without having to wait for the transmission time of one data frame, by readi ng bit 0 (txsf6) of asynchronous serial interface transmission status register 6 (asif6) when the transmission completion interrupt has occurred. to transmit data continuously, be sure to reference t he asif6 register to check the transmission status and whether the txb6 register can be written, and then write the data. cautions 1. the txbf6 and txsf6 flags of the asif6 register change from ?10? to ?11?, and to ?01? during continuous transmission. to check the status, therefore, do not use a combination of the txbf6 a nd txsf6 flags for judgment. read only the txbf6 flag when executing continuous transmission. 2. when the device is use in lin communi cation operation, the continuous transmission function cannot be used. make sure that asynchronous serial in terface transmission status register 6 (asif6) is 00h before writin g transmit data to transmit buffer register 6 (txb6). txbf6 writing to txb6 register 0 writing enabled 1 writing disabled caution to transmit data continuously, write the first transmit data (fi rst byte) to the txb6 register. be sure to check that the txbf6 fl ag is ?0?. if so, write the next transmit da ta (second byte) to the txb6 register. if data is written to the txb6 register while the txbf6 flag is ?1?, the transmit data cannot be guaranteed. the communication status can be checked using the txsf6 flag. txsf6 transmission status 0 transmission is completed. 1 transmission is in progress. cautions 1. to initialize the transm ission unit upon completion of continuous transmission, be sure to check that the txsf 6 flag is ?0? after generation of the transmission completion interrupt, and then execute initialization. if initialization is executed while the txsf6 flag is ?1?, the transmit data cannot be guaranteed. 2. during continuous transmi ssion, the next transmission m ay complete before execution of intst6 interrupt servicing after tran smission of one data frame. as a countermeasure, detection can be performe d by developing a program that can count the number of transmit data and by referencing the txsf6 flag. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 350 figure 14-16 shows an example of the continuous transmission processing flow. figure 14-16. example of contin uous transmission processing flow write txb6. set registers. write txb6. transfer executed necessary number of times? yes read asif6 txbf6 = 0? no no yes transmission completion interrupt occurs? read asif6 txsf6 = 0? no no no yes yes yes yes completion of transmission processing transfer executed necessary number of times? remark txb6: transmit buffer register 6 asif6: asynchronous serial interface transmission status register 6 txbf6: bit 1 of asif6 (transmit buffer data flag) txsf6: bit 0 of asif6 (trans mit shift register data flag) chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 351 figure 14-17 shows the timing of starting continuous transmission, and figure 14-18 shows the timing of ending continuous transmission. figure 14-17. timing of starting continuous transmission t x d6 start intst6 data (1) data (1) data (2) data (3) data (2) data (1) data (3) ff ff parity stop data (2) parity stop txb6 txs6 txbf6 txsf6 start start note note when asif6 is read, there is a period in which t xbf6 and txsf6 = 1, 1. therefore, judge whether writing is enabled using only the txbf6 bit. remark t x d6: t x d6 pin (output) intst6: interrupt request signal txb6: transmit buffer register 6 txs6: transmit shift register 6 asif6: asynchronous serial interface transmission status register 6 txbf6: bit 1 of asif6 txsf6: bit 0 of asif6 chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 352 figure 14-18. timing of ending continuous transmission t x d6 start intst6 data (n ? 1) data (n ? 1) data (n) data (n) data (n ? 1) ff parity stop stop data (n) parity stop txb6 txs6 txbf6 txsf6 power6 or txe6 start remark t x d6: t x d6 pin (output) intst6: interrupt request signal txb6: transmit buffer register 6 txs6: transmit shift register 6 asif6: asynchronous serial interface transmission status register 6 txbf6: bit 1 of asif6 txsf6: bit 0 of asif6 power6: bit 7 of asynchronous serial interface operation mode register (asim6) txe6: bit 6 of asynchronous serial interface operation mode register (asim6) chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 353 (e) normal reception reception is enabled and the r x d6 pin input is sampled when bit 7 (power6) of asynchronous serial interface operation mode register 6 (asim6) is set to 1 and then bit 5 (rxe6) of asim6 is set to 1. the 8-bit counter of the baud rate generator st arts counting when the falling edge of the r x d6 pin input is detected. when the set value of baud rate generator control register 6 (brgc6) has been counted, the r x d6 pin input is sampled again ( in figure 14-19). if the r x d6 pin is low level at this time, it is recognized as a start bit. when the start bit is detected, receptio n is started, and serial data is sequ entially stored in the receive shift register (rxs6) at the set baud rate. when the stop bi t has been received, the reception completion interrupt (intsr6) is generated and the data of rxs6 is written to receive buffer register 6 (rxb6). if an overrun error (ove6) occurs, however, the receiv e data is not written to rxb6. even if a parity error (pe6) occurs while reception is in progress, reception continues to the reception position of the stop bit, and a recept ion error interrupt (intsr6/intsre 6) is generated on completion of reception. figure 14-19. reception completi on interrupt request timing r x d6 (input) intsr6 start d0 d1 d2 d3 d4 d5 d6 d7 parity rxb6 stop cautions 1. if a reception error occu rs, read asis6 and then rxb6 to clear the error flag. otherwise, an overrun error will occur when the next data is r eceived, and the reception error status will persist. 2. reception is always performed with the ?num ber of stop bits = 1? . the second stop bit is ignored. 3. be sure to read asynchro nous serial interface reception e rror status register 6 (asis6) before reading rxb6. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 354 (f) reception error three types of errors may occur during reception: a parity error, framing error, or ov errun error. if the error flag of asynchronous serial interface reception error st atus register 6 (asis6) is set as a result of data reception, a reception error interrupt r equest (intsr6/intsre6) is generated. which error has occurred during reception can be identifi ed by reading the contents of asis6 in the reception error interrupt (intsr6/intsre6) servicing (see figure 14-6 ). the contents of asis6 are cleared to 0 when asis6 is read. table 14-3. cause of reception error reception error cause parity error the parity specifi ed for transmission does not match the parity of the receive data. framing error stop bit is not detected. overrun error reception of the next data is completed before data is read from receive buffer register 6 (rxb6). the reception error interrupt can be separated into reception completion interrupt (intsr6) and error interrupt (intsre6) by clearing bit 0 (isrm6) of asynch ronous serial interface operation mode register 6 (asim6) to 0. figure 14-20. reception error interrupt 1. if isrm6 is cleared to 0 (recep tion completion interr upt (intsr6) and error interrupt (intsre6) are separated) (a) no error during recepti on (b) error during reception intsr6 intsre6 intsr6 intsre6 2. if isrm6 is set to 1 (error interrupt is included in intsr6) (a) no error during recepti on (b) error during reception intsre6 intsr6 intsre6 intsr6 chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 355 (g) noise filter of receive data the rxd6 signal is sampled with the base clock output by the prescaler block. if two sampled values are the same, the output of t he match detector changes, and the data is sampled as input data. because the circuit is configured as shown in figure 14- 21, the internal processing of the reception operation is delayed by two clocks from the external signal status. figure 14-21. noise filter circuit internal signal b internal signal a match detector in base clock r x d6/p14 q in ld_en q (h) sbf transmission when the device is use in lin communication operati on, the sbf (synchronous break field) transmission control function is used for transmission. for the transmission operation of lin, see figure 14-1 lin transmission operation . when bit 7 (power6) of asynchronous serial interf ace mode register 6 (asim6) is set to 1, the t x d6 pin outputs high level. next, when bit 6 (txe6) of asim6 is set to 1, the transmission e nabled status is entered, and sbf transmission is started by setting bit 5 (sbtt6) of asynchronous serial interface control register 6 (asicl6) to 1. thereafter, a low level of bits 13 to 20 (set by bits 4 to 2 (sbl62 to sbl60) of asicl6) is output. following the end of sbf transmission, the transmission completi on interrupt request (i ntst6) is generated and sbtt6 is automatically cleared. thereafter, the normal transmission mode is restored. transmission is suspended until the dat a to be transmitted next is written to transmit buffer register 6 (txb6), or until sbtt6 is set to 1. figure 14-22. sbf transmission t x d6 intst6 sbtt6 1 2 3 4 5 6 7 8 9 10 11 12 13 stop remark t x d6: t x d6 pin (output) intst6: transmission completion interrupt request sbtt6: bit 5 of asynchronous serial interface control register 6 (asicl6) chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 356 (i) sbf reception when the device is used in lin communication operat ion, the sbf (synchronous break field) reception control function is used for reception. for the reception oper ation of lin, see figure 14-2 lin reception operation . reception is enabled when bit 7 (power6) of asynch ronous serial interface operation mode register 6 (asim6) is set to 1 and then bit 5 (rxe6) of asim6 is se t to 1. sbf reception is enabled when bit 6 (sbrt6) of asynchronous serial interface contro l register 6 (asicl6) is set to 1. in the sbf reception enabled status, the r x d6 pin is sampled and the start bit is detected in the same manner as the normal reception enable status. when the start bit has been detected, reception is started, and serial data is sequentially stored in the receive shift register 6 (rxs6) at the set baud rate. w hen the stop bit is received and if the width of sbf is 11 bits or more, a reception completion interrupt reques t (intsr6) is generated as normal processing. at this time, the sbrf6 and sbrt6 bits are automatical ly cleared, and sbf reception ends. detection of errors, such as ove6, pe6, and fe6 (bits 0 to 2 of as ynchronous serial interface reception error status register 6 (asis6)) is suppressed, and error detection processing of uart communication is not performed. in addition, data transfer between receive shift register 6 (rxs6) and receive buffer register 6 (rxb6) is not performed, and the reset value of ffh is retained. if the width of sbf is 10 bits or less, an interrupt does not occur as error processing after the stop bit has been re ceived, and the sbf reception mode is restored. in this case, the sbrf6 and sbrt6 bits are not cleared. figure 14-23. sbf reception 1. normal sbf reception (stop bit is detect ed with a width of more than 10.5 bits) r x d6 sbrt6 /sbrf6 intsr6 1234567891011 2. sbf reception error (stop bit is detect ed with a width of 10.5 bits or less) r x d6 sbrt6 /sbrf6 intsr6 12345678910 ?0? remark r x d6: r x d6 pin (input) sbrt6: bit 6 of asynchronous serial interface control register 6 (asicl6) sbrf6: bit 7 of asicl6 intsr6: reception completion interrupt request chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 357 14.4.3 dedicated baud rate generator the dedicated baud rate generator consists of a source clock selector and an 8-bit programmable counter, and generates a serial clock for transmission/reception of uart6. separate 8-bit counters are provided for transmission and reception. (1) configuration of ba ud rate generator ? base clock the clock selected by bits 3 to 0 (tps63 to tps60) of clock selectio n register 6 (cksr6) is supplied to each module when bit 7 (power6) of asynchronous serial interface operation mode register 6 (asim6) is 1. this clock is called the base clock and its frequency is called f xclk6 . the base clock is fixed to low level when power6 = 0. ? transmission counter this counter stops operation, clear ed to 0, when bit 7 (power6) or bit 6 (txe6) of asynchronous serial interface operation mode register 6 (asim6) is 0. it starts counting when power6 = 1 and txe6 = 1. the counter is cleared to 0 when the first data transmi tted is written to transmit buffer register 6 (txb6). if data are continuously transmitted, the counter is cleared to 0 agai n when one frame of data has been completely transmitted. if there is no data to be transmitted next, the count er is not cleared to 0 and continues counting until power6 or txe6 is cleared to 0. ? reception counter this counter stops operation, clear ed to 0, when bit 7 (power6) or bit 5 (rxe6) of asynchronous serial interface operation mode register 6 (asim6) is 0. it starts counting when the start bit has been detected. the counter stops operation after one frame has been received, until the next start bit is detected. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 358 figure 14-24. configuration of baud rate generator selector power6 8-bit counter match detector baud rate baud rate generator brgc6: mdl67 to mdl60 1/2 power6, txe6 (or rxe6) cksr6: tps63 to tps60 f prs f prs /2 f prs /2 2 f prs /2 3 f prs /2 4 f prs /2 5 f prs /2 6 f prs /2 7 f prs /2 8 f prs /2 9 f prs /2 10 8-bit timer/ event counter 50 output f xclk6 remark power6: bit 7 of asynchronous serial interface operation mode register 6 (asim6) txe6: bit 6 of asim6 rxe6: bit 5 of asim6 cksr6: clock selection register 6 brgc6: baud rate generator control register 6 (2) generation of serial clock a serial clock to be generated can be specified by usin g clock selection register 6 (cksr6) and baud rate generator control register 6 (brgc6). the clock to be input to the 8-bit counter can be set by bits 3 to 0 (tps63 to tps60) of cksr6 and the division value (f xclk6 /4 to f xclk6 /255) of the 8-bit counter can be set by bits 7 to 0 (mdl67 to mdl60) of brgc6. chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 359 14.4.4 calculation of baud rate (1) baud rate calculation expression the baud rate can be calculated by the following expression. ? baud rate = [bps] f xclk6 : frequency of base clock selected by tps63 to tps60 bits of cksr6 register k: value set by mdl67 to mdl60 bits of brgc6 register (k = 4, 5, 6, ..., 255) table 14-4. set value of tps63 to tps60 base clock (f xclk6 ) selection note 1 tps63 tps62 tps61 tps60 f prs = 2 mhz f prs = 5 mhz f prs = 10 mhz f prs = 20 mhz 0 0 0 0 f prs note 2 2 mhz 5 mhz 10 mhz 20 mhz 0 0 0 1 f prs /2 1 mhz 2.5 mhz 5 mhz 10 mhz 0 0 1 0 f prs /2 2 500 khz 1.25 mhz 2.5 mhz 5 mhz 0 0 1 1 f prs /2 3 250 khz 625 khz 1.25 mhz 2.5 mhz 0 1 0 0 f prs /2 4 125 khz 312.5 khz 625 khz 1.25 mhz 0 1 0 1 f prs /2 5 62.5 khz 156.25 khz 312.5 khz 625 khz 0 1 1 0 f prs /2 6 31.25 khz 78.13 khz 156.25 khz 312.5 khz 0 1 1 1 f prs /2 7 15.625 khz 39.06 khz 78.13 khz 156.25 khz 1 0 0 0 f prs /2 8 7.813 khz 19.53 khz 39.06 khz 78.13 khz 1 0 0 1 f prs /2 9 3.906 khz 9.77 khz 19.53 khz 39.06 khz 1 0 1 0 f prs /2 10 1.953 khz 4.88 khz 9.77 khz 19.53 khz 1 0 1 1 tm50 output note 3 other than above setting prohibited notes 1. if the peripheral hardware clock (f prs ) operates on the high-speed system clock (f xh ) (xsel = 1), the f prs operating frequency varies depending on the supply voltage. ? v dd = 4.0 to 5.5 v: f prs 20 mhz ? v dd = 2.7 to 4.0 v: f prs 10 mhz ? v dd = 1.8 to 2.7 v: f prs 5 mhz (standard and (a) grade products only) 2. if the peripheral hardware clock (f prs ) operates on the internal high-speed oscillation clock (f rh ) (xsel = 0), when 1.8 v v dd < 2.7 v, the setting of tps63 = tps62 = tps61 = tps60 = 0 (base clock: f prs ) is prohibited. 3. note the following points when selecting the tm50 output as the base clock. ? mode in which the count clock is clear ed and started upon a match of tm50 and cr50 (tmc506 = 0) start the operation of 8-bit timer/event count er 50 first and then enable the timer f/f inversion operation (tmc501 = 1). ? pwm mode (tmc506 = 1) start the operation of 8-bit timer/event counte r 50 first and then set the count clock to make the duty = 50%. it is not necessary to enable (toe50 = 1) to50 output in any mode. f xclk6 2 k chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 360 (2) error of baud rate the baud rate error can be calculated by the following expression. ? error (%) = ? 1 100 [%] cautions 1. keep the baud rate error during transmission to within th e permissible error range at the reception destination. 2. make sure that the baud rate error dur ing reception satisfies th e range shown in (4) permissible baud rate ra nge during reception. example: frequency of base clock = 10 mhz = 10,000,000 hz set value of mdl67 to mdl60 bits of brgc6 register = 00100001b (k = 33) target baud rate = 153600 bps baud rate = 10 m / (2 33) = 10000000 / (2 33) = 151,515 [bps] error = (151515/153600 ? 1) 100 = ? 1.357 [%] (3) example of setting baud rate table 14-5. set data of baud rate generator f prs = 2.0 mhz f prs = 5.0 mhz f prs = 10.0 mhz f prs = 20.0 mhz baud rate [bps] tps63- tps60 k calculated value err [%] tps63- tps60 k calculated value err [%] tps63- tps60 k calculated value err [%] tps63- tps60 k calculated value err [%] 300 8h 13 301 0.16 7h 65 301 0.16 8h 65 301 0.16 9h 65 301 0.16 600 7h 13 601 0.16 6h 65 601 0.16 7h 65 601 0.16 8h 65 601 0.16 1200 6h 13 1202 0.16 5h 65 1202 0.16 6h 65 1202 0.16 7h 65 1202 0.16 2400 5h 13 2404 0.16 4h 65 2404 0.16 5h 65 2404 0.16 6h 65 2404 0.16 4800 4h 13 4808 0.16 3h 65 4808 0.16 4h 65 4808 0.16 5h 65 4808 0.16 9600 3h 13 9615 0.16 2h 65 9615 0.16 3h 65 9615 0.16 4h 65 9615 0.16 19200 2h 13 19231 0.16 1h 65 19231 0.16 2h 65 19231 0.16 3h 65 19231 0.16 24000 1h 21 23810 ? 0.79 3h 13 24038 0.16 4h 13 24038 0.16 5h 13 24038 0.16 31250 1h 4 31250 0 4h 5 31250 0 5h 5 31250 0 6h 5 31250 0 38400 1h 13 38462 0.16 0h 65 38462 0.16 1h 65 38462 0.16 2h 65 38462 0.16 48000 0h 21 47619 ? 0.79 2h 13 48077 0.16 3h 13 48077 0.16 4h 13 48077 0.16 76800 0h 13 76923 0.16 0h 33 75758 ? 1.36 0h 65 76923 0.16 1h 65 76923 0.16 115200 0h 9 111111 ? 3.55 1h 11 113636 ? 1.36 0h 43 116279 0.94 0h 87 114943 ? 0.22 153600 ? ? ? ? 1h 8 156250 1.73 0h 33 151515 ? 1.36 1h 33 151515 ? 1.36 312500 ? ? ? ? 0h 8 312500 0 1h 8 312500 0 2h 8 312500 0 625000 ? ? ? ? 0h 4 625000 0 1h 4 625000 0 2h 4 625000 0 remark tps63 to tps60: bits 3 to 0 of clock select ion register 6 (cksr6) (setting of base clock (f xclk6 )) k: value set by mdl67 to mdl60 bits of baud rate generator control register 6 (brgc6) (k = 4, 5, 6, ..., 255) f prs : peripheral hardware clock frequency err: baud rate error actual baud rate (baud rate with error) desired baud rate (correct baud rate) chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 361 (4) permissible baud rate range during reception the permissible error from the baud rate at the trans mission destination during reception is shown below. caution make sure that the baud rate error during reception is within the permissible error range, by using the calculation expression shown below. figure 14-25. permissible baud rate range during reception fl 1 data frame (11 fl) flmin flmax data frame length of uart6 start bit bit 0 bit 1 bit 7 parity bit minimum permissible data frame length maximum permissible data frame length stop bit start bit bit 0 bit 1 bit 7 parity bit latch timing stop bit start bit bit 0 bit 1 bit 7 parity bit stop bit as shown in figure 14-25, the latch timing of the re ceive data is determined by t he counter set by baud rate generator control register 6 (brgc6) a fter the start bit has been detected. if the last data (stop bit) meets this latch timing, the data can be correctly received. assuming that 11-bit data is received, the theoretical values can be calculated as follows. fl = (brate) ? 1 brate: baud rate of uart6 k: set value of brgc6 fl: 1-bit data length margin of latch timing: 2 clocks chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 362 minimum permissible data frame length: flmin = 11 fl ? fl = fl therefore, the maximum receivable baud rate at the transmission destination is as follows. brmax = (flmin/11) ? 1 = brate similarly, the maximum permissible data fr ame length can be calculated as follows. 10 k + 2 21k ? 2 11 2 k 2 k flmax = fl 11 therefore, the minimum receivable baud rate at the transmission destination is as follows. brmin = (flmax/11) ? 1 = brate the permissible baud rate error between uart6 and the transmission destination can be calculated from the above minimum and maximum baud rate expressions, as follows. table 14-6. maximum/minimum permissible baud rate error division ratio (k) maximum perm issible baud rate error minimu m permissible baud rate error 4 +2.33% ? 2.44% 8 +3.53% ? 3.61% 20 +4.26% ? 4.31% 50 +4.56% ? 4.58% 100 +4.66% ? 4.67% 255 +4.72% ? 4.73% remarks 1. the permissible error of reception depends on t he number of bits in one frame, input clock frequency, and division ratio (k). the higher t he input clock frequency and the higher the division ratio (k), the higher the permissible error. 2. k: set value of brgc6 22k 21k + 2 flmax = 11 fl ? fl = fl 21k ? 2 20k 20k 21k ? 2 k ? 2 2k 21k + 2 2k chapter 14 serial interface uart6 user?s manual u17336ej5v0ud 363 (5) data frame length during continuous transmission when data is continuously transmitted, th e data frame length from a stop bit to the next start bit is extended by two clocks of base clock from the normal value. howeve r, the result of communica tion is not affected because the timing is initialized on the recepti on side when the start bit is detected. figure 14-26. data frame length during continuous transmission start bit bit 0 bit 1 bit 7 parity bit stop bit fl 1 data frame fl fl fl fl fl fl flstp start bit of second byte start bit bit 0 where the 1-bit data length is fl, the stop bit length is flstp, and base clock frequency is f xclk6 , the following expression is satisfied. flstp = fl + 2/f xclk6 therefore, the data frame length during continuous transmission is: data frame length = 11 fl + 2/f xclk6 user?s manual u17336ej5v0ud 364 chapter 15 serial interface csi10 15.1 functions of serial interface csi10 serial interface csi10 has the following two modes. ? operation stop mode ? 3-wire serial i/o mode (1) operation stop mode this mode is used when serial communication is not performed and can enable a reduction in the power consumption. for details, see 15.4.1 operation stop mode . (2) 3-wire serial i/o mode (ms b/lsb-first selectable) this mode is used to communicate 8-bit data using three lines: a serial clock line (sck10) and two serial data lines (si10 and so10). the processing time of data communication can be s hortened in the 3-wire serial i/o mode because transmission and reception can be simultaneously executed. in addition, whether 8-bit data is communicated with the msb or lsb first can be specified, so this interface can be connected to any device. the 3-wire serial i/o mode is used for connecting periphe ral ics and display controllers with a clocked serial interface. for details, see 15.4.2 3-wire serial i/o mode . chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 365 15.2 configuration of serial interface csi10 serial interface csi10 includes the following hardware. table 15-1. configuration of serial interface csi10 item configuration controller transmit controller clock start/stop controller & clock phase controller registers transmit buffer register 10 (sotb10) serial i/o shift re gister 10 (sio10) control registers serial operation mode register 10 (csim10) serial clock selection register 10 (csic10) port mode register 1 (pm1) port register 1 (p1) figure 15-1. block diagram of serial interface csi10 internal bus si10/p11/r x d0 intcsi10 f prs /2 f prs /2 2 f prs /2 3 f prs /2 4 f prs /2 5 f prs /2 6 f prs /2 7 sck10/p10/txd0 transmit buffer register 10 (sotb10) transmit controller clock start/stop controller & clock phase controller serial i/o shift register 10 (sio10) output selector so10/p12 output latch 8 transmit data controller 8 output latch (p12) pm12 so10 output baud rate generator output latch (p10) pm10 selector chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 366 (1) transmit buffer register 10 (sotb10) this register sets the transmit data. transmission/reception is started by wr iting data to sotb10 when bit 7 (csie 10) and bit 6 (trmd10) of serial operation mode register 10 (csim10) is 1. the data written to sotb10 is converted from parallel data into serial data by serial i/o shift register 10, and output to the serial output pin (so10). sotb10 can be written or read by an 8- bit memory manipulation instruction. reset signal generation sets this register to 00h. caution do not access sotb10 when csot 10 = 1 (during serial communication). (2) serial i/o shift register 10 (sio10) this is an 8-bit register that converts data from parallel data into serial data and vice versa. this register can be read by an 8-bit memory manipulation instruction. reception is started by reading data fr om sio10 if bit 6 (trmd10) of serial operation mode register 10 (csim10) is 0. during reception, the data is read from the serial input pin (si10) to sio10. reset signal generation sets this register to 00h. caution do not access sio10 when csot 10 = 1 (during serial communication). chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 367 15.3 registers controlling serial interface csi10 serial interface csi10 is controlled by the following four registers. ? serial operation mode register 10 (csim10) ? serial clock selection register 10 (csic10) ? port mode register 1 (pm1) ? port register 1 (p1) (1) serial operation mode register 10 (csim10) csim10 is used to select the operation m ode and enable or disable operation. csim10 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to 00h. figure 15-2. format of serial oper ation mode register 10 (csim10) address: ff80h after reset: 00h r/w note 1 symbol <7> 6 5 4 3 2 1 0 csim10 csie10 trmd10 0 dir10 0 0 0 csot10 csie10 operation control in 3-wire serial i/o mode 0 disables operation note 2 and asynchronously resets the internal circuit note 3 . 1 enables operation trmd10 note 4 transmit/receive mode control 0 note 5 receive mode (transmission disabled). 1 transmit/receive mode dir10 note 6 first bit specification 0 msb 1 lsb csot10 communication status flag 0 communication is stopped. 1 communication is in progress. notes 1. bit 0 is a read-only bit. 2. to use p10/sck10/t x d0 and p12/so10 as general-purpose por ts, set csim10 in the default status (00h). 3. bit 0 (csot10) of csim10 and serial i/o shift register 10 (sio10) are reset. 4. do not rewrite trmd10 when csot10 = 1 (during serial communication). 5. the so10 output (see figure 15-1 ) is fixed to the low level when trmd10 is 0. reception is started when data is read from sio10. 6. do not rewrite dir10 when csot10 = 1 (during serial communication). caution be sure to clear bit 5 to 0. chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 368 (2) serial clock selecti on register 10 (csic10) this register specifies the timing of the data transmission/reception and sets the serial clock. csic10 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to 00h. figure 15-3. format of serial clo ck selection register 10 (csic10) address: ff81h after reset: 00h r/w symbol 7 6 5 4 3 2 1 0 csic10 0 0 0 ckp10 dap10 cks102 cks101 cks100 ckp10 dap10 specification of data transmission/reception timing type 0 0 d7 d6 d5 d4 d3 d2 d1 d0 sck10 so10 si10 input timing 1 0 1 d7 d6 d5 d4 d3 d2 d1 d0 sck10 so10 si10 input timing 2 1 0 d7 d6 d5 d4 d3 d2 d1 d0 sck10 so10 si10 input timing 3 1 1 d7 d6 d5 d4 d3 d2 d1 d0 sck10 so10 si10 input timing 4 csi10 serial clock selection notes 1, 2 cks102 cks101 cks100 f prs = 2 mhz f prs = 5 mhz f prs = 10 mhz f prs = 20 mhz mode 0 0 0 f prs /2 1 mhz 2.5 mhz 5 mhz setting prohibited 0 0 1 f prs /2 2 500 khz 1.25 mhz 2.5 mhz 5 mhz 0 1 0 f prs /2 3 250 khz 625 khz 1.25 mhz 2.5 mhz 0 1 1 f prs /2 4 125 khz 312.5 khz 625 khz 1.25 mhz 1 0 0 f prs /2 5 62.5 khz 156.25 khz 312.5 khz 625 khz 1 0 1 f prs /2 6 31.25 khz 78.13 khz 156.25 khz 312.5 khz 1 1 0 f prs /2 7 15.63 khz 39.06 khz 78.13 khz 156.25 khz master mode 1 1 1 external clock input to sck10 slave mode note 1. if the peripheral hardware clock (f prs ) operates on the high-speed system clock (f xh ) (xsel = 1), the f prs operating frequency varies depending on the supply voltage. ? v dd = 4.0 to 5.5 v: f prs 20 mhz ? v dd = 2.7 to 4.0 v: f prs 10 mhz ? v dd = 1.8 to 2.7 v: f prs 5 mhz (standard and (a) grade products only) chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 369 note 2. set the serial clock to satisfy the following conditions. supply voltage standard products (a) gr ade products (a2) grade products v dd = 4.0 to 5.5 v serial clock 6.25 mhz serial clock 5 mhz serial clock 5 mhz v dd = 2.7 to 4.0 v serial clock 4 mhz serial clock 2.5 mhz serial clock 2.5 mhz v dd = 1.8 to 2.7 v serial clock 2 mhz serial clock 1.66 mhz ? cautions 1. do not write to csic10 while csie10 = 1 (operation enabled). 2. to use p10/sck10/t x d0 and p12/so10 as general-purpose ports, set csic10 in the default status (00h). 3. the phase type of the data clock is type 1 after reset. remark f prs : peripheral hardware clock frequency chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 370 (3) port mode register 1 (pm1) this register sets port 1 input/output in 1-bit units. when using p10/sck10 as the clock output pin of the serial interface, clear pm10 to 0, and set the output latch of p10 to 1. when using p12/so10 as the data output pin of the serial interface, clear pm12 and the output latch of p12 to 0. when using p10/sck10/txd0 as the clock input pin of the serial interface, p11/si10/r x d0 as the data input pin, set pm10 and pm11 to 1. at this time, the output latches of p10 and p11 may be 0 or 1. pm1 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets this register to ffh. figure 15-4. format of port mode register 1 (pm1) 7 pm17 6 pm16 5 pm15 4 pm14 3 pm13 2 pm12 1 pm11 0 pm10 symbol pm1 address: ff21h after reset: ffh r/w pm1n 0 1 p1n pin i/o mode selection (n = 0 to 7) output mode (output buffer on) input mode (output buffer off) chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 371 15.4 operation of serial interface csi10 serial interface csi10 can be used in the following two modes. ? operation stop mode ? 3-wire serial i/o mode 15.4.1 operation stop mode serial communication is not executed in this mode. therefore, the power consumption can be reduced. in addition, the p10/sck10/t x d0, p11/si10/r x d0, and p12/so10 pins can be used as ordinary i/o port pins in this mode. (1) register used the operation stop mode is set by serial operation mode register 10 (csim10). to set the operation stop mode, clear bit 7 (csie10) of csim10 to 0. (a) serial operation mode register 10 (csim10) csim10 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets csim10 to 00h. address: ff80h after reset: 00h r/w symbol <7> 6 5 4 3 2 1 0 csim10 csie10 trmd10 0 dir10 0 0 0 csot10 csie10 operation control in 3-wire serial i/o mode 0 disables operation note 1 and asynchronously resets the internal circuit note 2 . notes 1. to use p10/sck10/t x d0 and p12/so10 as general-purpose ports, set csim10 in the default status (00h). 2. bit 0 (csot10) of csim10 and serial i/o shift register 10 (sio10) are reset. 15.4.2 3-wire serial i/o mode the 3-wire serial i/o mode is used for connecting peripheral ics and display controll ers with a clocked serial interface. in this mode, communication is executed by using three lin es: the serial clock (sck10), serial output (so10), and serial input (si10) lines. (1) registers used ? serial operation mode register 10 (csim10) ? serial clock selection register 10 (csic10) ? port mode register 1 (pm1) ? port register 1 (p1) chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 372 the basic procedure of setting an operation in the 3-wire se rial i/o mode is as follows. <1> set the csic10 register (see figure 15-3 ). <2> set bits 4, and 6 (dir10, and tr md10) of the csim10 register (see figure 15-2 ). <3> set bit 7 (csie10) of the csim10 register to 1. transmission/reception is enabled. <4> write data to transmit buffer register 10 (sotb10). data transmission/reception is started. read data from serial i/o shift register 10 (sio10). data reception is started. caution take the relationship with the other pa rty of communication when setting the port mode register and port register. the relationship between the register settings and pins is shown below. table 15-2. relationship between register settings and pins pin function csie10 trmd10 pm11 p11 pm12 p12 pm10 p10 csi10 operation si10/r x d0/ p11 so10/p12 sck10/ t x d0/p10 0 note 1 note 1 note 1 note 1 note 1 note 1 stop r x d0/p11 p12 t x d0/ p10 note 2 1 0 1 note 1 note 1 1 slave reception note 3 si10 p12 sck10 (input) note 3 1 1 note 1 note 1 0 0 1 slave transmission note 3 r x d0/p11 so10 sck10 (input) note 3 1 1 1 0 0 1 slave transmission/ reception note 3 si10 so10 sck10 (input) note 3 1 0 1 note 1 note 1 0 1 master reception si10 p12 sck10 (output) 1 1 note 1 note 1 0 0 0 1 master transmission r x d0/p11 so10 sck10 (output) 1 1 1 0 0 0 1 master transmission/ reception si10 so10 sck10 (output) notes 1. can be set as port function. 2. to use p10/sck10/t x d0 as port pins, clear ckp10 to 0. 3. to use the slave mode, set cks102, cks101, and cks100 to 1, 1, 1. remark : don?t care csie10: bit 7 of serial operation mode register 10 (csim10) trmd10: bit 6 of csim10 ckp10: bit 4 of serial clock selection register 10 (csic10) cks102, cks101, cks100: bits 2 to 0 of csic10 pm1 : port mode register p1 : port output latch chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 373 (2) communication operation in the 3-wire serial i/o mode, data is tr ansmitted or received in 8-bit units. each bit of the dat a is transmitted or received in synchronization with the serial clock. data can be transmitted or received if bit 6 (trmd10) of serial operation mode register 10 (csim10) is 1. transmission/reception is started when a value is writt en to transmit buffer register 10 (sotb10). in addition, data can be received when bit 6 (trmd10) of seri al operation mode register 10 (csim10) is 0. reception is started when dat a is read from serial i/o shift register 10 (sio10). after communication has been started, bit 0 (csot10) of csim10 is set to 1. when communication of 8-bit data has been completed, a communication completion interrupt request flag (csiif10) is set, and csot10 is cleared to 0. then the next communication is enabled. caution do not access the control register and data register when csot10 = 1 (during serial communication). chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 374 figure 15-5. timing in 3-wire serial i/o mode (1/2) (a) transmission/reception ti ming (type 1: trmd10 = 1, di r10 = 0, ckp10 = 0, dap10 = 0) aah abh 56h adh 5ah b5h 6ah d5h 55h (communication data) 55h is written to sotb10. sck10 sotb10 sio10 csot10 csiif10 so10 si10 (receive aah) read/write trigger intcsi10 chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 375 figure 15-5. timing in 3-wire serial i/o mode (2/2) (b) transmission/reception timi ng (type 2: trmd10 = 1, di r10 = 0, ckp10 = 0, dap10 = 1) abh 56h adh 5ah b5h 6ah d5h sck10 sotb10 sio10 csot10 csiif10 so10 si10 (input aah) aah 55h (communication data) 55h is written to sotb10. read/write trigger intcsi10 chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 376 figure 15-6. timing of clock/data phase (a) type 1: ckp10 = 0, dap10 = 0, dir10 = 0 d7 d6 d5 d4 d3 d2 d1 d0 sck10 so10 writing to sotb10 or reading from sio10 si10 capture csiif10 csot10 (b) type 2: ckp10 = 0, dap10 = 1, dir10 = 0 d7 d6 d5 d4 d3 d2 d1 d0 sck10 so10 writing to sotb10 or reading from sio10 si10 capture csiif10 csot10 (c) type 3: ckp10 = 1, dap10 = 0, dir10 = 0 d7 d6 d5 d4 d3 d2 d1 d0 sck10 so10 writing to sotb10 or reading from sio10 si10 capture csiif10 csot10 (d) type 4: ckp10 = 1, dap10 = 1, dir10 = 0 d7 d6 d5 d4 d3 d2 d1 d0 sck10 so10 writing to sotb10 or reading from sio10 si10 capture csiif10 csot10 remark the above figure illustrates a communication operati on where data is transmitted with the msb first. chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 377 (3) timing of output to so10 pin (first bit) when communication is started, the value of transmit buffe r register 10 (sotb10) is output from the so10 pin. the output operation of the first bit at this time is described below. figure 15-7. output operation of first bit (1/2) (a) type 1: ckp10 = 0, dap10 = 0 sck10 sotb10 sio10 so10 writing to sotb10 or reading from sio10 first bit 2nd bit output latch (b) type 3: ckp10 = 1, dap10 = 0 sck10 sotb10 sio10 output latch so10 writing to sotb10 or reading from sio10 first bit 2nd bit the first bit is directly latched by the sotb10 register to the output latch at the falling (or rising) edge of sck10, and output from the so10 pin via an output selector. then, the value of the sotb10 regi ster is transferred to the sio10 register at the next rising (or fa lling) edge of sck10, and shifted one bit. at the same time, the first bit of the receive data is stored in the s io10 register via the si10 pin. the second and subsequent bits are latc hed by the sio10 register to the output latch at the next falling (or rising) edge of sck10, and the data is output from the so10 pin. chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 378 figure 15-7. output operation of first bit (2/2) (c) type 2: ckp10 = 0, dap10 = 1 sck10 sotb10 sio10 so10 writing to sotb10 or reading from sio10 first bit 2nd bit 3rd bit output latch (d) type 4: ckp10 = 1, dap10 = 1 first bit 2nd bit 3rd bit sck10 sotb10 sio10 output latch so10 writing to sotb10 or reading from sio10 the first bit is directly latched by the sotb10 register at the falling edge of the write signal of the sotb10 register or the read signal of the sio10 register, and output from the so10 pin via an output selector. then, the value of the sotb10 register is transfe rred to the sio10 register at the next falling (or rising) edge of sck10, and shifted one bit. at the same time, the first bit of the rece ive data is stored in the sio10 register via the si10 pin. the second and subsequent bits are latc hed by the sio10 register to the out put latch at the next rising (or falling) edge of sck10, and the data is output from the so10 pin. chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 379 (4) output value of so10 pin (last bit) after communication has been completed, the so10 pin holds the output value of the last bit. figure 15-8. output value of so10 pin (last bit) (1/2) (a) type 1: ckp10 = 0, dap10 = 0 sck10 sotb10 sio10 so10 writing to sotb10 or reading from sio10 ( next request is issued.) last bit output latch (b) type 3: ckp10 = 1, dap10 = 0 last bit ( next request is issued.) sck10 sotb10 sio10 output latch so10 writing to sotb10 or reading from sio10 chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 380 figure 15-8. output value of so10 pin (last bit) (2/2) (c) type 2: ckp10 = 0, dap10 = 1 sck10 sotb10 sio10 so10 last bit writing to sotb10 or reading from sio10 ( next request is issued.) output latch (d) type 4: ckp10 = 1, dap10 = 1 last bit ( next request is issued.) sck10 sotb10 sio10 output latch so10 writing to sotb10 or reading from sio10 chapter 15 serial interface csi10 user?s manual u17336ej5v0ud 381 (5) so10 output (see figure 15-1) the status of the so10 output is as follows if bit 7 (csie10) of seri al operation mode register 10 (csim10) is cleared to 0. table 15-3. so10 output status trmd10 dap10 dir10 so10 output note 1 trmd10 = 0 note 2 ? ? outputs low level note 2 dap10 = 0 ? value of so10 latch (low-level output) dir10 = 0 value of bit 7 of sotb10 trmd10 = 1 dap10 = 1 dir10 = 1 value of bit 0 of sotb10 notes 1. the actual output of the so10/p12 pin is determined according to pm12 and p12, as well as the so10 output. 2. status after reset caution if a value is written to trmd10, dap10, and dir10, the output value of so10 changes. user?s manual u17336ej5v0ud 382 chapter 16 serial interface iic0 16.1 functions of serial interface iic0 serial interface iic0 has the following two modes. (1) operation stop mode this mode is used when serial transfers are not performed. it can therefore be used to reduce power consumption. (2) i 2 c bus mode (multimaster supported) this mode is used for 8-bit data transfers with several devices via two lines: a serial clock (scl0) line and a serial data bus (sda0) line. this mode complies with the i 2 c bus format and the master device can generated ?start condition?, ?address?, ?transfer direction specification?, ?dat a?, and ?stop condition? data to the slave device, via the serial data bus. the slave device automatically detects these received status and data by har dware. this function can simplify the part of application prog ram that controls the i 2 c bus. since the scl0 and sda0 pins are used for open drain ou tputs, iic0 requires pull-up resistors for the serial clock line and the serial data bus line. caution do not use serial interface iic0 and the multiplier/divider simultaneously, because various flags corresponding to interrupt request sour ces are shared among serial interface iic0 and the multiplier/divider. figure 16-1 shows a block diagram of serial interface iic0. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 383 figure 16-1. block diagram of serial interface iic0 internal bus iic status register 0 (iics0) iic control register 0 (iicc0) slave address register 0 (sva0) noise eliminator noise eliminator bus status detector match signal iic shift register 0 (iic0) so latch iice0 dq set clear cl01, cl00 trc0 dfc0 dfc0 sda0/ p61 scl0/ p60 data hold time correction circuit start condition generator stop condition generator ack generator wake-up controller ack detector output control stop condition detector serial clock counter interrupt request signal generator serial clock controller serial clock wait controller prescaler intiic0 iic shift register 0 (iic0) iicc0.stt0, spt0 iics0.msts0, exc0, coi0 iics0.msts0, exc0, coi0 f prs lrel0 wrel0 spie0 wtim0 acke0 stt0 spt0 msts0 ald0 exc0 coi0 trc0 ackd0 std0 spd0 start condition detector internal bus cld0 dad0 smc0 dfc0 cl01 cl00 clx0 iic clock selection register 0 (iiccl0) stcf iicbsy stcen iicrsv iic flag register 0 (iicf0) iic function expansion register 0 (iicx0) n-ch open- drain output pm61 output latch (p61) n-ch open- drain output pm60 output latch (p60) exscl0/ p62 chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 384 figure 16-2 shows a serial bus configuration example. figure 16-2. serial bus c onfiguration example using i 2 c bus master cpu1 slave cpu1 address 0 sda0 scl0 serial data bus serial clock + v dd + v dd sda0 scl0 sda0 scl0 sda0 scl0 sda0 scl0 master cpu2 slave cpu2 address 1 slave cpu3 address 2 slave ic address 3 slave ic address n chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 385 16.2 configuration of serial interface iic0 serial interface iic0 includes the following hardware. table 16-1. configuration of serial interface iic0 item configuration registers iic shift register 0 (iic0) slave address register 0 (sva0) control registers iic control register 0 (iicc0) iic status register 0 (iics0) iic flag register 0 (iicf0) iic clock selection register 0 (iiccl0) iic function expansion register 0 (iicx0) port mode register 6 (pm6) port register 6 (p6) (1) iic shift register 0 (iic0) iic0 is used to convert 8-bit serial data to 8-bit paralle l data and vice versa in synchronization with the serial clock. iic0 can be used for both transmission and reception. the actual transmit and receive operations can be contro lled by writing and reading operations to iic0. cancel the wait state and start data transfer by writing data to iic0 during the wait period. iic0 is set by an 8-bit memory manipulation instruction. reset signal generation clears iic0 to 00h. figure 16-3. format of iic shift register 0 (iic0) symbol iic0 address: ffa5h after reset: 00h r/w 76543210 cautions 1. do not write data to iic0 during data transfer. 2. write or read iic0 only during the wait pe riod. accessing iic0 in a communication state other than during the wait period is prohibit ed. when the device serves as the master, however, iic0 can be written only once after the communication trigger bit (stt0) is set to 1. (2) slave address register 0 (sva0) this register stores local addresses when in slave mode. sva0 is set by an 8-bit memory manipulation instruction. however, rewriting to this register is prohibited wh ile std0 = 1 (while the start condition is detected). reset signal generation clears sva0 to 00h. figure 16-4. format of slave address register 0 (sva0) symbol sva0 address: ffa7h after reset: 00h r/w 76543210 0 note note bit 0 is fixed to 0. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 386 (3) so latch the so latch is used to retain the sda0 pin?s output level. (4) wake-up controller this circuit generates an interrupt request (intiic0) w hen the address received by this register matches the address value set to slave address register 0 (sva0) or when an extension code is received. (5) prescaler this selects the sampling clock to be used. (6) serial clock counter this counter counts the serial clocks that are output or input during transmi t/receive operations and is used to verify that 8-bit data was transmitted or received. (7) interrupt request signal generator this circuit controls the generation of interrupt request signals (intiic0). an i 2 c interrupt request is generated by the following two triggers. ? falling edge of eighth or ninth clock of the serial clock (set by wtim0 bit) ? interrupt request generated when a stop cond ition is detected (set by spie0 bit) remark wtim0 bit: bit 3 of iic control register 0 (iicc0) spie0 bit: bit 4 of iic control register 0 (iicc0) (8) serial clock controller in master mode, this circuit generates the clock output via the scl0 pin from a sampling clock. (9) serial clock wait controller this circuit controls the wait timing. (10) ack generator, stop condition detector, start condition detector, and ack detector these circuits generate and detect each status. (11) data hold time correction circuit this circuit generates the hold time for data corre sponding to the falling edge of the serial clock. (12) start condition generator this circuit generates a start conditi on when the stt0 bit is set to 1. however, in the communication reservation disabled stat us (iicrsv bit = 1), when the bus is not released (iicbsy bit = 1), start condition requests are ignored and the stcf bit is set to 1. (13) stop condition generator this circuit generates a stop condition when the spt0 bit is set to 1. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 387 (14) bus status detector this circuit detects whether or not the bus is releas ed by detecting start conditions and stop conditions. however, as the bus status cannot be detected immediately following operation, the initial status is set by the stcen bit. remark stt0 bit: bit 1 of iic control register 0 (iicc0) spt0 bit: bit 0 of iic control register 0 (iicc0) iicrsv bit: bit 0 of iic flag register 0 (iicf0) iicbsy bit: bit 6 of iic flag register 0 (iicf0) stcf bit: bit 7 of iic flag register 0 (iicf0) stcen bit: bit 1 of iic flag register 0 (iicf0) chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 388 16.3 registers to control serial interface iic0 serial interface iic0 is controlled by the following seven registers. ? iic control register 0 (iicc0) ? iic flag register 0 (iicf0) ? iic status register 0 (iics0) ? iic clock selection register 0 (iiccl0) ? iic function expansion register 0 (iicx0) ? port mode register 6 (pm6) ? port register 6 (p6) (1) iic control register 0 (iicc0) this register is used to enable/stop i 2 c operations, set wait timing, and set other i 2 c operations. iicc0 is set by a 1-bit or 8-bit memory manipulation instruction. however, set the spie0, wtim0, and acke0 bits while iice0 bit = 0 or during the wait period. thes e bits can be set at the same time when the iice0 bit is set from ?0? to ?1?. reset signal generation clears iicc0 to 00h. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 389 figure 16-5. format of iic control register 0 (iicc0) (1/4) address: ffa6h after reset: 00h r/w symbol <7> <6> <5> <4> <3> <2> <1> <0> iicc0 iice0 lrel0 wrel0 spie0 wtim0 acke0 stt0 spt0 iice0 i 2 c operation enable 0 stop operation. reset iic status register 0 (iics0) note 1 . stop internal operation. 1 enable operation. be sure to set this bit (1) while the scl0 and sda0 lines are at high level. condition for clearing (iice0 = 0) condition for setting (iice0 = 1) ? cleared by instruction ? reset ? set by instruction lrel0 note 2 exit from communications 0 normal operation 1 this exits from the current communications and sets sta ndby mode. this setting is automatically cleared to 0 after being executed. its uses include cases in which a locally irrelevant extension code has been received. the scl0 and sda0 lines are set to high impedance. the following flags of iic control register 0 (iicc0) and iic status register 0 (iics0) are cleared to 0. ? stt0 ? spt0 ? msts0 ? exc0 ? coi0 ? trc0 ? ackd0 ? std0 the standby mode following exit from communications remains in effect until the following co mmunications en try conditions are met. ? after a stop condition is detected, restart is in master mode. ? an address match or extension code rece ption occurs after the start condition. condition for clearing (lrel0 = 0) condition for setting (lrel0 = 1) ? automatically cleared after execution ? reset ? set by instruction wrel0 note 2 wait cancellation 0 do not cancel wait 1 cancel wait. this setting is automatic ally cleared after wait is canceled. when wrel0 is set (wait canceled) during the wait period at the ninth clock pulse in the transmission status (trc0 = 1), the sda0 line goes into the high impedance state (trc0 = 0). condition for clearing (wrel0 = 0) condition for setting (wrel0 = 1) ? automatically cleared after execution ? reset ? set by instruction notes 1. the iics0 register, the stcf0 and iic bsy bits of the iicf0 register, and the cld0 and dad0 bits of the iiccl0 register are reset. 2. this flag?s signal is invalid when iice0 = 0. caution the start condition is detected immediately after i 2 c is enabled to operate (iice0 = 1) while the scl0 line is at high level and the sda0 line is at low level. imme diately after enabling i 2 c to operate (iice0 = 1), set lrel0 (1) by usin g a 1-bit memory manipulation instruction. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 390 figure 16-5. format of iic control register 0 (iicc0) (2/4) spie0 note 1 enable/disable generation of interrupt request when stop condition is detected 0 disable 1 enable condition for clearing (spie0 = 0) condition for setting (spie0 = 1) ? cleared by instruction ? reset ? set by instruction wtim0 note 1 control of wait and interrupt request generation 0 interrupt request is generated at the eighth clock?s falling edge. master mode: after output of eight clocks, cloc k output is set to low level and wait is set. slave mode: after input of eight clo cks, the clock is set to low level and wait is set for master device. 1 interrupt request is generated at the ninth clock?s falling edge. master mode: after output of nine clocks, clock output is set to low level and wait is set. slave mode: after input of nine clo cks, the clock is set to low level and wait is set for master device. an interrupt is generated at the falling edge of the ninth clock during address transfer independently of the setting of this b it. the setting of this bit is valid when the address transfer is comp leted. when in master mode, a wait is inserted at the fallin g edge of the ninth clock during address transfers. for a slave devi ce that has received a local address, a wait is inserted at the falling edge of the ninth clock after an acknowledge (ack) is issued. however, when the slave device has received an extension code, a wait is inserted at the falling edge of the eighth clock. condition for clearing (wtim0 = 0) condition for setting (wtim0 = 1) ? cleared by instruction ? reset ? set by instruction acke0 notes 1, 2 acknowledgment control 0 disable acknowledgment. 1 enable acknowledgment. during t he ninth clock period, the sda0 line is set to low level. condition for clearing (acke0 = 0) condition for setting (acke0 = 1) ? cleared by instruction ? reset ? set by instruction notes 1. this flag?s signal is invalid when iice0 = 0. 2. the set value is invalid during address transfer and if the code is not an extension code. when the device serves as a slave and the addresses match, an acknowledge is generated regardless of the set value. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 391 figure 16-5. format of iic control register 0 (iicc0) (3/4) stt0 note start condition trigger 0 do not generate a start condition. 1 when bus is released (in stop mode): generate a start condition (for starting as master). when the scl0 line is high level, the sda0 line is changed from high level to low level and then the start condition is generated. next, after the rated amount of time has elapsed, scl0 is changed to low level (wait state). when a third party is communicating: ? when communication reservation function is enabled (iicrsv = 0) functions as the start condition reservation flag. w hen set to 1, automatically generates a start condition after the bus is released. ? when communication reservation function is disabled (iicrsv = 1) stcf is set to 1 and information that is set (1) to stt0 is cleared. no start condition is generated. in the wait state (when master device): generates a restart condition after releasing the wait. cautions concerning set timing ? for master reception: cannot be set to 1 during transfer. can be set to 1 only in the waiting period when acke0 has been cleared to 0 and slave has been notified of final reception. ? for master transmission: a start condition cannot be genera ted normally during the acknowledge period. set to 1 during the wait period that follows output of the ninth clock. ? cannot be set to 1 at the same time as spt0. ? setting stt0 to 1 and then setting it again bef ore it is cleared to 0 is prohibited. condition for clearing (stt0 = 0) condition for setting (stt0 = 1) ? cleared by setting sst0 to 1 while communication reservation is prohibited. ? cleared by loss in arbitration ? cleared after start condition is generated by master device ? cleared by lrel0 = 1 (exit from communications) ? when iice0 = 0 (operation stop) ? reset ? set by instruction note this flag?s signal is invalid when iice0 = 0. remarks 1. bit 1 (stt0) becomes 0 when it is read after data setting. 2. iicrsv: bit 0 of iic flag register (iicf0) stcf: bit 7 of iic flag register (iicf0) chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 392 figure 16-5. format of iic control register 0 (iicc0) (4/4) spt0 stop condition trigger 0 stop condition is not generated. 1 stop condition is generated (terminati on of master device?s transfer). after the sda0 line goes to low level, either set the scl0 li ne to high level or wait until it goes to high level. next, after the rated amount of time has elapsed, the sda0 line changes from low level to high level and a stop condition is generated. cautions concerning set timing ? for master reception: cannot be set to 1 during transfer. can be set to 1 only in the waiting period when acke0 has been cleared to 0 and slave has been notified of final reception. ? for master transmission: a stop condition cannot be generat ed normally during the acknowledge period. therefore, set it during the wait period that follows output of the ninth clock. ? cannot be set to 1 at the same time as stt0. ? spt0 can be set to 1 only when in master mode note . ? when wtim0 has been cleared to 0, if spt0 is set to 1 during t he wait period that follows output of eight clocks, note that a stop condition will be generated during the high-level period of the ninth clock. wtim0 should be changed from 0 to 1 during the wait period following the output of eight clocks, and spt0 shoul d be set to 1 during the wait period that follows the outpu t of the ninth clock. ? setting spt0 to 1 and then setting it again bef ore it is cleared to 0 is prohibited. condition for clearing (spt0 = 0) condition for setting (spt0 = 1) ? cleared by loss in arbitration ? automatically cleared after stop condition is detected ? cleared by lrel0 = 1 (exit from communications) ? when iice0 = 0 (operation stop) ? reset ? set by instruction note set spt0 to 1 only in master mode. however, spt0 mu st be set to 1 and a stop condition generated before the first stop condition is detected following the switch to the operation enabled status. for details, see 16.5.15 cautions . caution when bit 3 (trc0) of iic status register 0 (iic s0) is set to 1, wrel0 is set to 1 during the ninth clock and wait is canceled, after which trc0 is cleared and the sda0 line is set to high impedance. remark bit 0 (spt0) becomes 0 when it is read after data setting. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 393 (2) iic status register 0 (iics0) this register indicates the status of i 2 c. iics0 is read by a 1-bit or 8-bit memory manipulation instruction only when stt0 = 1 and during the wait period. reset signal generation clears iics0 to 00h. caution if data is read from iics0 , a wait cycle is generated. do not read data from iics0 when the cpu is operating on the subsystem clock and th e peripheral hardware cl ock is stopped. for details, see chapter 34 cautions for wait. figure 16-6. format of iic status register 0 (iics0) (1/3) address: ffaah after reset: 00h r symbol <7> <6> <5> <4> <3> <2> <1> <0> iics0 msts0 ald0 exc0 coi0 trc0 ackd0 std0 spd0 msts0 master device status 0 slave device status or communication standby status 1 master device communication status condition for clearing (msts0 = 0) condition for setting (msts0 = 1) ? when a stop condition is detected ? when ald0 = 1 (arbitration loss) ? cleared by lrel0 = 1 (exit from communications) ? when iice0 changes from 1 to 0 (operation stop) ? reset ? when a start condition is generated ald0 detection of arbitration loss 0 this status means either that there was no arbitr ation or that the arbitration result was a ?win?. 1 this status indicates the arbitration result was a ?loss?. msts0 is cleared. condition for clearing (ald0 = 0) condition for setting (ald0 = 1) ? automatically cleared after iics0 is read note ? when iice0 changes from 1 to 0 (operation stop) ? reset ? when the arbitration result is a ?loss?. exc0 detection of extension code reception 0 extension code was not received. 1 extension code was received. condition for clearing (exc0 = 0) condition for setting (exc0 = 1) ? when a start condition is detected ? when a stop condition is detected ? cleared by lrel0 = 1 (exit from communications) ? when iice0 changes from 1 to 0 (operation stop) ? reset ? when the higher four bits of the received address data is either ?0000? or ?1111? (set at the rising edge of the eighth clock). note this register is also cleared when a 1-bit memory manipulation instruction is executed for bits other than iics0. therefore, when using the ald0 bit, read the data of this bit before the data of the other bits. remark lrel0: bit 6 of iic control register 0 (iicc0) iice0: bit 7 of iic control register 0 (iicc0) chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 394 figure 16-6. format of iic status register 0 (iics0) (2/3) coi0 detection of matching addresses 0 addresses do not match. 1 addresses match. condition for clearing (coi0 = 0) condition for setting (coi0 = 1) ? when a start condition is detected ? when a stop condition is detected ? cleared by lrel0 = 1 (exit from communications) ? when iice0 changes from 1 to 0 (operation stop) ? reset ? when the received address matches the local address (slave address register 0 (sva0)) (set at the rising edge of the eighth clock). trc0 detection of transmit/receive status 0 receive status (other than transmit status). the sda0 line is set for high impedance. 1 transmit status. the value in the so0 latch is ena bled for output to the sda0 line (valid starting at the falling edge of the first byte?s ninth clock). condition for clearing (trc0 = 0) condition for setting (trc0 = 1) chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 395 figure 16-6. format of iic status register 0 (iics0) (3/3) ackd0 detection of ack 0 ack was not detected. 1 ack was detected. condition for clearing (ackd0 = 0) condition for setting (ackd0 = 1) ? when a stop condition is detected ? at the rising edge of the next byte?s first clock ? cleared by lrel0 = 1 (exit from communications) ? when iice0 changes from 1 to 0 (operation stop) ? reset ? after the sda0 line is set to low level at the rising edge of scl0?s ninth clock std0 detection of start condition 0 start condition was not detected. 1 start condition was detected. this indicates that the address transfer period is in effect. condition for clearing (std0 = 0) condition for setting (std0 = 1) ? when a stop condition is detected ? at the rising edge of the next byte?s first clock following address transfer ? cleared by lrel0 = 1 (exit from communications) ? when iice0 changes from 1 to 0 (operation stop) ? reset ? when a start condition is detected spd0 detection of stop condition 0 stop condition was not detected. 1 stop condition was detected. the master device?s co mmunication is terminated and the bus is released. condition for clearing (spd0 = 0) condition for setting (spd0 = 1) ? at the rising edge of the address transfer byte?s first clock following setting of this bit and detection of a start condition ? when iice0 changes from 1 to 0 (operation stop) ? reset ? when a stop condition is detected remark lrel0: bit 6 of iic control register 0 (iicc0) iice0: bit 7 of iic control register 0 (iicc0) (3) iic flag register 0 (iicf0) this register sets the operation mode of i 2 c and indicates the status of the i 2 c bus. iicf0 is set by a 1-bit or 8-bit memory manipulation instruction. however, t he stcf and iicbsy bits are read- only. the iicrsv bit can be used to enable/disable the communication reservation function (see 16.5.14 communication reservation ). stcen can be used to set the in itial value of the iicbsy bit (see 16.5.15 cautions ). iicrsv and stcen can be written only when the operation of i 2 c is disabled (bit 7 (iice0) of iic control register 0 (iicc0) = 0). when operation is enabled, the iicf0 register can be read. reset signal generation clears iicf0 to 00h. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 396 figure 16-7. format of iic flag register 0 (iicf0) <7> stcf condition for clearing (stcf = 0) ? cleared by stt0 = 1 ? when iice0 = 0 (operation stop) ? reset condition for setting (stcf = 1) ? generating start condition unsuccessful and stt0 cleared to 0 when communication reservation is disabled (iicrsv = 1). stcf 0 1 generate start condition start condition generation unsuccessful: clear stt0 flag stt0 clear flag iicf0 symbol <6> iicbsy 5 0 4 0 3 0 2 0 <1> stcen <0> iicrsv address: ffabh after reset: 00h r/w note condition for clearing (iicbsy = 0) ? detection of stop condition ? when iice0 = 0 (operation stop) ? reset condition for setting (iicbsy = 1) ? detection of start condition ? setting of iice0 when stcen = 0 iicbsy 0 1 bus release status (communication initial status when stcen = 1) bus communication status (communication initial status when stcen = 0) i 2 c bus status flag condition for clearing (stcen = 0) ? detection of start condition ? reset condition for setting (stcen = 1) ? set by instruction stcen 0 1 after operation is enabled (iice0 = 1), enable generation of a start condition upon detection of a stop condition. after operation is enabled (iice0 = 1), enable generation of a start condition without detecting a stop condition. initial start enable trigger condition for clearing (iicrsv = 0) ? cleared by instruction ? reset condition for setting (iicrsv = 1) ? set by instruction iicrsv 0 1 enable communication reservation disable communication reservation communication reservation function disable bit note bits 6 and 7 are read-only. cautions 1. write to stcen only when the operation is stopped (iice0 = 0). 2. as the bus release status (iicbsy = 0) is recognized regardless of the actual bus status when stcen = 1, when generating th e first start condition (stt0 = 1), it is necessary to verify that no third party comm unications are in progress in order to prevent such communications from being destroyed. 3. write to iicrsv only when th e operation is stopped (iice0 = 0). remark stt0: bit 1 of iic control register 0 (iicc0) iice0: bit 7 of iic control register 0 (iicc0) chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 397 (4) iic clock selection register 0 (iiccl0) this register is used to set the transfer clock for the i 2 c bus. iiccl0 is set by a 1-bit or 8-bit memory manipulation in struction. however, the cld0 and dad0 bits are read- only. the smc0, cl01, and cl00 bits are set in comb ination with bit 0 (clx0) of iic function expansion register 0 (iicx0) (see 16.3 (6) i 2 c transfer clock setting method ). set iiccl0 while bit 7 (iice0) of iic control register 0 (iicc0) is 0. reset signal generation clears iiccl0 to 00h. figure 16-8. format of iic clock selection register 0 (iiccl0) address: ffa8h after reset: 00h r/w note symbol 7 6 <5> <4> <3> <2> 1 0 iiccl0 0 0 cld0 dad0 smc0 dfc0 cl01 cl00 cld0 detection of scl0 pin level (valid only when iice0 = 1) 0 the scl0 pin was detected at low level. 1 the scl0 pin was detected at high level. condition for clearing (cld0 = 0) condition for setting (cld0 = 1) ? when the scl0 pin is at low level ? when iice0 = 0 (operation stop) ? reset ? when the scl0 pin is at high level dad0 detection of sda0 pin level (valid only when iice0 = 1) 0 the sda0 pin was detected at low level. 1 the sda0 pin was detected at high level. condition for clearing (dad0 = 0) condition for setting (dad0 = 1) ? when the sda0 pin is at low level ? when iice0 = 0 (operation stop) ? reset ? when the sda0 pin is at high level smc0 operation mode switching 0 operates in standard mode. 1 operates in high-speed mode. dfc0 digital filter operation control 0 digital filter off. 1 digital filter on. digital filter can be used only in high-speed mode. in high-speed mode, the transfer clock does not va ry regardless of dfc0 bit set (1)/clear (0). the digital filter is used for noise elimination in high-speed mode. note bits 4 and 5 are read-only. remark iice0: bit 7 of iic control register 0 (iicc0) chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 398 (5) iic function expansi on register 0 (iicx0) this register sets the function expansion of i 2 c. iicx0 is set by a 1-bit or 8-bit memory manipulation instru ction. the clx0 bit is set in combination with bits 3, 1, and 0 (smc0, cl01, and cl00) of iic cl ock selection register 0 (iiccl0) (see 16.3 (6) i 2 c transfer clock setting method ). set iicx0 while bit 7 (iice0) of iic control register 0 (iicc0) is 0. reset signal generation clears iicx0 to 00h. figure 16-9. format of iic functi on expansion register 0 (iicx0) address: ffa9h after reset: 00h r/w symbol 7 6 5 4 3 2 1 <0> iicx0 0 0 0 0 0 0 0 clx0 (6) i 2 c transfer clock setting method the i 2 c transfer clock frequency (f scl ) is calculated using the following expression. f scl = 1/(m t + t r + t f ) m = 12, 16, 24, 44, 66, 86 (see table 16-2 selection clock setting ) t: 1/f w t r : scl0 rise time t f : scl0 fall time for example, the i 2 c transfer clock frequency (f scl ) when f w = f prs /2 = 4.19 mhz, m = 86, t r = 200 ns, and t f = 50 ns is calculated using following expression. f scl = 1/(88 238.7 ns + 200 ns + 50 ns) ? 48.1 khz m t + t r + t f m/2 t m/2 t t f t r scl0 scl0 inversion scl0 inversion scl0 inversion chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 399 the selection clock is set using a combination of bits 3, 1, and 0 (smc0, cl01, and cl00) of iic clock selection register 0 (iiccl0) and bit 0 (clx0) of iic function expansion register 0 (iicx0). table 16-2. selection clock setting iicx0 iiccl0 bit 0 bit 3 bit 1 bit 0 clx0 smc0 cl01 cl00 selection clock (f w ) notes 1, 2 transfer clock (f w /m) settable selection clock (f w ) range operation mode 0 0 0 0 f prs /2 f w /44 2.00 to 4.19 mhz 0 0 0 1 f prs /2 f w /86 0 0 1 0 f prs /4 f w /86 4.19 to 8.38 mhz 0 0 1 1 f exscl0 f w /66 6.4 mhz normal mode (smc0 bit = 0) 0 1 0 f prs /2 f w /24 0 1 1 0 f prs /4 f w /24 4.00 to 8.38 mhz 0 1 1 1 f exscl0 f w /18 6.4 mhz high-speed mode (smc0 bit = 1) 1 0 setting prohibited 1 1 0 f prs /2 f w /12 1 1 1 0 f prs /4 f w /12 4.00 to 4.19 mhz high-speed mode (smc0 bit = 1) 1 1 1 1 setting prohibited notes 1. if the peripheral hardware clock (f prs ) operates on the high-speed system clock (f xh ) (xsel = 1), the f prs operating frequency varies depending on the supply voltage. ? v dd = 4.0 to 5.5 v: f prs 20 mhz ? v dd = 2.7 to 4.0 v: f prs 10 mhz ? v dd = 1.8 to 2.7 v: f prs 5 mhz (standard and (a) grade products only) 2. if the peripheral hardware clock (f prs ) operates on the internal high-speed oscillation clock (f xh ) (xsel = 0), set clx0, smc0, cl01 and cl00 as follows. iicx0 iiccl0 bit 0 bit 3 bit 1 bit 0 clx0 smc0 cl01 cl00 selection clock (f w ) notes 1, 2 transfer clock (f w /m) settable selection clock (f w ) range operation mode 0 0 0 0 f prs /2 f w /44 normal mode (smc0 bit = 0) 0 1 0 f prs /2 f w /24 3.8 mhz to 4.2 mhz high-speed mode (smc0 bit = 1) caution determine the transf er clock frequency of i 2 c by using clx0, smc0, cl01, and cl00 before enabling the operation (by setting bit 7 (iice0) of iic control register 0 (iicc0) to 1). to change the transfer clock frequency, clear iice0 once to 0. remarks 1. : don?t care 2 . f prs : peripheral hardware clock frequency 3 . f exscl0 : external clock frequency from exscl0 pin chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 400 (7) port mode register 6 (pm6) this register sets the input/output of port 6 in 1-bit units. when using the p60/scl0 pin as clock i/o and the p61/ sda0 pin as serial data i/o, clear pm60 and pm61, and the output latches of p60 and p61 to 0. set iice0 (bit 7 of iic control register 0 (iicc0)) to 1 before setting the output mode because the p60/scl0 and p61/sda0 pins output a low level (fixed) when iice0 is 0. pm6 is set by a 1-bit or 8-bit memory manipulation instruction. reset signal generati on sets pm6 to ffh. figure 16-10. format of port mode register 6 (pm6) pm60 pm61 pm62 pm63 1 1 1 1 p6n pin i/o mode selection (n = 0 to 3) output mode (output buffer on) input mode (output buffer off) pm6n 0 1 0 1 2 3 4 5 6 7 pm6 address: ff26h after reset: ffh r/w symbol chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 401 16.4 i 2 c bus mode functions 16.4.1 pin configuration the serial clock pin (scl0) and serial data bus pin (sda0) are configured as follows. (1) scl0 ...... this pin is used for serial clock input and output. this pin is an n-ch open-drain output for both master and slave devices. input is schmitt input. (2) sda0 ...... this pin is used fo r serial data input and output. this pin is an n-ch open-drain output for both master and slave devices. input is schmitt input. since outputs from the serial clock line and the serial data bus line are n-ch open-drai n outputs, an external pull-up resistor is required. figure 16-11. pin configuration diagram master device clock output (clock input) data output data input v ss v ss scl0 sda0 v dd v dd (clock output) clock input data output data input v ss v ss slave device scl0 sda0 chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 402 16.5 i 2 c bus definitions and control methods the following section describes the i 2 c bus?s serial data communication format and the signals used by the i 2 c bus. figure 16-12 shows the transfer timing for the ?start conditi on?, ?address?, ?data?, and ?st op condition? output via the i 2 c bus?s serial data bus. figure 16-12. i 2 c bus serial data transfer timing scl0 sda0 start condition address r/w ack data 1-7 8 9 1-8 ack data ack stop condition 9 1-8 9 the master device generates the start c ondition, slave address, and stop condition. the acknowledge (ack) can be generated by either the master or slave device (normally, it is output by the device that receives 8-bit data). the serial clock (scl0) is continuously output by the master device. howeve r, in the slave device, the scl0?s low level period can be extended and a wait can be inserted. 16.5.1 start conditions a start condition is met when the scl0 pin is at high level and the sda0 pin changes from high level to low level. the start conditions for the scl0 pin and sda0 pin are signal s that the master device gener ates to the slave device when starting a serial transfer. when the device is us ed as a slave, start conditions can be detected. figure 16-13. start conditions scl0 sda0 h a start condition is output when bit 1 (stt0) of iic control r egister 0 (iicc0) is set (to 1) after a stop condition has been detected (spd0: bit 0 = 1 in iic status register 0 (iic s0)). when a start condition is detected, bit 1 (std0) of iics0 is set (to 1). chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 403 16.5.2 addresses the address is defined by the 7 bits of data that follow the start condition. an address is a 7-bit data segment that is output in order to select one of t he slave devices that are connected to the master device via the bus lines. therefore, each slave device connected via the bus lines must have a unique address. the slave devices include hardware t hat detects the start condition and c hecks whether or not the 7-bit address data matches the data values stored in slave address register 0 (sva0). if the address data matches the sva0 values, the slave device is selected and communicates with the master device until th e master device generates a start condition or stop condition. figure 16-14. address scl0 sda0 intiic0 123456789 a6 a5 a4 a3 a2 a1 a0 r/w address note note intiic0 is not issued if data other than a local address or extension code is received during slave device operation. the slave address and the eighth bit, which spec ifies the transfer direction as described in 16.5.3 transfer direction specification below, are together written to iic shift r egister 0 (iic0) and are then output. received addresses are written to iic0. the slave address is assigned to the higher 7 bits of iic0. 16.5.3 transfer di rection specification in addition to the 7-bit address data, the master device s ends 1 bit that specifies t he transfer direction. when this transfer direction specificati on bit has a value of ?0?, it indicates that the master device is transmitting data to a slave device. when the transfer direction specification bit has a value of ?1?, it indicates that the master device is receiving data from a slave device. figure 16-15. transfer direction specification scl0 sda0 intiic0 123456789 a6 a5 a4 a3 a2 a1 a0 r/w transfer direction specification note note intiic0 is not issued if data other than a local address or extension code is received during slave device operation. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 404 16.5.4 ack ack is used to check the status of serial data at the transmission and reception sides. the reception side returns ack each time it has received 8-bit data. the transmission side usually receives ack after transmitting 8-bit data. when ack is returned from the reception side, it is assumed that reception has been correctly performed and processi ng is continued. whether ack has been detected can be checked by using bit 2 (ack d0) of iic status register 0 (iics0). when the master receives the last dat a item, it does not return ack and instead generates a stop condition. if a slave does not return ack after receiving data, the ma ster outputs a stop condition or restart condition and stops transmission. if ack is not returned, the possible causes are as follows. <1> reception was not performed normally. <2> the final data item was received. <3> the reception side specified by the address does not exist. to generate ack, the reception side makes the sda0 line low at the ninth clock (indicating normal reception). automatic generation of ack is enabled by setting bit 2 (ac ke0) of iic control register 0 (iicc0) to 1. bit 3 (trc0) of the iics0 register is set by the data of the eighth bit that follows 7-bit addre ss information. usually, set acke0 to 1 for reception (trc0 = 0). if a slave can receive no more data during reception (trc 0 = 0) or does not require the next data item, then the slave must inform the master, by clearing acke0 to 0, that it will not receive any more data. when the master does not require the next data item during reception (trc0 = 0), it must clear acke0 to 0 so that ack is not generated. in this way, the master informs a slave at the transmission side that it does not require any more data (transmission will be stopped). figure 16-16. ack scl0 sda0 123456789 a6 a5 a4 a3 a2 a1 a0 r/w ack when the local address is received, ac k is automatically generated, regardl ess of the value of acke0. when an address other than that of t he local address is received, ack is not generated (nack). when an extension code is received, ack is gen erated if acke0 is set to 1 in advance. how ack is generated when data is received differs as follows depending on the setting of the wait timing. ? when 8-clock wait state is selected (b it 3 (wtim0) of iicc0 register = 0): by setting acke0 to 1 before releasing the wait state, ack is generated at the falling edge of the eighth clock of the scl0 pin. ? when 9-clock wait state is selected (b it 3 (wtim0) of iicc0 register = 1): ack is generated by setting acke0 to 1 in advance. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 405 16.5.5 stop condition when the scl0 pin is at high level, changing the sda0 pin from low level to high level generates a stop condition. a stop condition is a signal that the master device generates to the slave device when serial transfer has been completed. when the device is used as a slave, stop conditions can be detected. figure 16-17. stop condition scl0 sda0 h a stop condition is generated when bit 0 (spt0) of iic c ontrol register 0 (iicc0) is set to 1. when the stop condition is detected, bit 0 (spd0) of iic status register 0 (iics0) is se t to 1 and intiic0 is generated when bit 4 (spie0) of iicc0 is set to 1. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 406 16.5.6 wait the wait is used to notify the communication partner that a device (master or slave) is preparing to transmit or receive data (i.e., is in a wait state). setting the scl0 pin to low level notifi es the communication partner of the wait state. when wait state has been canceled for both the master and slave devices, the next data transfer can begin. figure 16-18. wait (1/2) (1) when master device has a nine-clock wait and slave device has an eight-clock wait (master transmits, slave receives, and acke0 = 1) master iic0 scl0 slave iic0 scl0 acke0 transfer lines scl0 sda0 6789 123 master returns to high impedance but slave is in wait state (low level). wait after output of ninth clock iic0 data write (cancel wait) wait after output of eighth clock wait from slave wait from master ffh is written to iic0 or wrel0 is set to 1 678 9 123 d2 d1 d0 d7 d6 d5 ack h chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 407 figure 16-18. wait (2/2) (2) when master and slave devices both have a nine-clock wait (master transmits, slave receives, and acke0 = 1) master iic0 scl0 slave iic0 scl0 acke0 transfer lines scl0 sda0 h 6789 1 23 master and slave both wait after output of ninth clock wait from master and slave wait from slave iic0 data write (cancel wait) ffh is written to iic0 or wrel0 is set to 1 6789 123 d2 d1 d0 ack d7 d6 d5 generate according to previously set acke0 value remark acke0: bit 2 of iic control register 0 (iicc0) wrel0: bit 5 of iic control register 0 (iicc0) a wait may be automatically generated depending on the setting of bit 3 (wtim0) of iic control register 0 (iicc0). normally, the receiving side cancels the wait state when bit 5 (wrel0) of iicc0 is set to 1 or when ffh is written to iic shift register 0 (iic0), and the transmitting side cancels the wait state when data is written to iic0. the master device can also cancel the wait state via either of the following methods. ? by setting bit 1 (stt0) of iicc0 to 1 ? by setting bit 0 (spt0) of iicc0 to 1 chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 408 16.5.7 canceling wait the i 2 c usually cancels a wait stat e by the following processing. ? writing data to iic shift register 0 (iic0) ? setting bit 5 (wrel0) of iic control register 0 (iicc0) (canceling wait) ? setting bit 1 (stt0) of iic0 register (generating start condition) note ? setting bit 0 (spt0) of iic0 regi ster (generating stop condition) note note master only when the above wait canceling pr ocessing is executed, the i 2 c cancels the wait state and communication is resumed. to cancel a wait state and transmit data (incl uding addresses), write the data to iic0. to receive data after canceling a wait state, or to comple te data transmission, set bit 5 (wrel0) of the iic0 control register 0 (iicc0) to 1. to generate a restart condition after canceling a wait state, set bit 1 (stt0) of iicc0 to 1. to generate a stop condition after canceling a wait state, set bit 0 (spt0) of iicc0 to 1. execute the canceling processing only once for one wait state. if, for example, data is written to iic0 after canceling a wa it state by setting wrel0 to 1, an incorrect value may be output to sda0 because the timing for changing the sd a0 line conflicts with the timing for writing iic0. in addition to the above, communication is stopped if iic e0 is cleared to 0 when communication has been aborted, so that the wait st ate can be canceled. if the i 2 c bus has deadlocked due to noise, processing is saved from communication by setting bit 6 (lrel0) of iicc0, so that the wait state can be canceled. 16.5.8 interrupt request (intiic0) generation timing and wait control the setting of bit 3 (wtim0) of iic c ontrol register 0 (iicc0) determines t he timing by which intiic0 is generated and the corresponding wait control, as shown in table 16-3. table 16-3. intiic0 generation timing and wait control during slave device operation during master device operation wtim0 address data reception data transmission address data reception data transmission 0 9 notes 1, 2 8 note 2 8 note 2 9 8 8 1 9 notes 1, 2 9 note 2 9 note 2 9 9 9 notes 1. the slave device?s intiic0 signal and wait period occu rs at the falling edge of the ninth clock only when there is a match with the address set to slave address register 0 (sva0). at this point, ack is generated regardless of the val ue set to iicc0?s bit 2 (acke0). for a slave device that has received an extension code, intiic0 occu rs at the falling edge of the eighth clock. however, if the address does not match after rest art, intiic0 is generated at the falling edge of the 9th clock, but wait does not occur. 2. if the received address does not match the contents of slave address register 0 (sva0) and extension code is not received, neither intiic0 nor a wait occurs. remark the numbers in the table indicate the number of t he serial clock?s clock signals. interrupt requests and wait control are both synchronized with t he falling edge of these clock signals. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 409 (1) during address transmission/reception ? slave device operation: interrupt and wait timi ng are determined depending on the conditions described in notes 1 and 2 above, regardless of the wtim0 bit. ? master device operation: interrupt and wait timing oc cur at the falling edge of the ninth clock regardless of the wtim0 bit. (2) during data reception ? master/slave device operation: interrupt and wait timing are determined according to the wtim0 bit. (3) during data transmission ? master/slave device operation: interrupt and wait timing are determined according to the wtim0 bit. (4) wait cancellation method the four wait cancellation methods are as follows. ? writing data to iic shift register 0 (iic0) ? setting bit 5 (wrel0) of iic control register 0 (iicc0) (canceling wait) ? setting bit 1 (stt0) of iic0 register (generating start condition) note ? setting bit 0 (spt0) of iic0 regi ster (generating stop condition) note note master only. when an 8-clock wait has been selected (wtim0 = 0) , the presence/absence of ack generation must be determined prior to wait cancellation. (5) stop condition detection intiic0 is generated when a stop condit ion is detected (only when spie0 = 1). 16.5.9 address match detection method in i 2 c bus mode, the master device can se lect a particular slave device by transmitting the corresponding slave address. address match can be detected automatical ly by hardware. an interrupt r equest (intiic0) occurs when a local address has been set to slave address register 0 (sva0) and when the address set to sva0 matches the slave address sent by the master device, or when an extension code has been received. 16.5.10 error detection in i 2 c bus mode, the status of t he serial data bus (sda0) during data transmi ssion is captured by iic shift register 0 (iic0) of the transmitting device, so the iic0 data prior to transmission can be compared with the transmitted iic0 data to enable detection of transmission errors. a transmission error is judged as having occurred when the compared data values do not match. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 410 16.5.11 extension code (1) when the higher 4 bits of the receive address are ei ther ?0000? or ?1111?, the extension code reception flag (exc0) is set to 1 for extension code reception and an interrupt request (intiic0) is issued at the falling edge of the eighth clock. the local address stored in slave address register 0 (sva0) is not affected. (2) if ?11110 0? is set to sva0 by a 10-bit address transfer and ?11110 0? is transferred from the master device, the results are as follows. note that intiic0 occurs at the falling edge of the eighth clock. ? higher four bits of data match: exc0 = 1 ? seven bits of data match: coi0 = 1 remark exc0: bit 5 of iic status register 0 (iics0) coi0: bit 4 of iic status register 0 (iics0) (3) since the processing after the interrupt request occurs differs according to the data that follows the extension code, such processing is performed by software. if the extension code is received while a slave device is operating, then the slave device is participating in communication even if its address does not match. for example, after the extension code is received, if you do not wish to operate the target device as a slave device, set bit 6 (lrel0) of the iic control register 0 (iicc0) to 1 to set the standby mode for the next communication operation. table 16-4. extension code bit definitions slave address r/w bit description 0 0 0 0 0 0 0 0 general call address 0 0 0 0 0 0 0 1 start byte 0 0 0 0 0 0 1 c-bus address 0 0 0 0 0 1 0 address that is reserved for different bus format 1 1 1 1 0 x x 10-bit slave address specification chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 411 16.5.12 arbitration when several master devices simultaneously generate a star t condition (when stt0 is set to 1 before std0 is set to 1), communication among the master devices is perform ed as the number of clocks are adjusted until the data differs. this kind of operation is called arbitration. when one of the master devices loses in arbitration, an arbitration loss flag (ald 0) in iic status register 0 (iics0) is set (1) via the timing by which the arbitration loss oc curred, and the scl0 and sda0 lines are both set to high impedance, which releases the bus. the arbitration loss is detected based on the timing of the next interrupt reques t (the eighth or ninth clock, when a stop condition is detected, et c.) and the ald0 = 1 setting that has been made by software. for details of interrupt request timing, see 16.5.17 timing of i 2 c interrupt request (intiic0) occurrence . remark std0: bit 1 of iic status register 0 (iics0) stt0: bit 1 of iic control register 0 (iicc0) figure 16-19. arbitration timing example scl0 sda0 scl0 sda0 scl0 sda0 hi-z hi-z master 1 loses arbitration master 1 master 2 transfer lines chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 412 table 16-5. status during arbitration and interrupt request generation timing status during arbitration interrupt request generation timing during address transmission read/write data after address transmission during extension code transmission read/write data after extension code transmission during data transmission during ack transfer period after data transmission when restart condition is detected during data transfer at falling edge of eighth or ninth clock following byte transfer note 1 when stop condition is detected during data transf er when stop condition is generated (when spie0 = 1) note 2 when data is at low level while attempting to generate a restart condition at falling edge of eighth or ninth clock following byte transfer note 1 when stop condition is detected while attempting to generate a restart condition when stop condition is generated (when spie0 = 1) note 2 when data is at low level while attempting to generate a stop condition when scl0 is at low level while attempting to generate a restart condition at falling edge of eighth or ninth clock following byte transfer note 1 notes 1. when wtim0 (bit 3 of iic control register 0 (iicc0 )) = 1, an interrupt request occurs at the falling edge of the ninth clock. when wtim0 = 0 and the extension code?s slave address is received, an interrupt request occurs at the falling edge of the eighth clock. 2. when there is a chance that ar bitration will occur, set spie0 = 1 for master device operation. remark spie0: bit 4 of iic control register 0 (iicc0) 16.5.13 wakeup function the i 2 c bus slave function is a function that generates an interrupt request si gnal (intiic0) when a local address and extension code have been received. this function makes processing more efficient by pr eventing unnecessary intiic0 signal from occurring when addresses do not match. when a start condition is detected, wake up standby mode is set. this wakeup standby mode is in effect while addresses are transmitted due to the possibility that an ar bitration loss may change the master device (which has generated a start condition) to a slave device. however, when a stop condition is detecte d, bit 4 (spie0) of iic control register 0 (iicc0) is set regardless of the wakeup function, and this determines whether interrupt requests are enabled or disabled. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 413 16.5.14 communication reservation (1) when communication reservation func tion is enabled (bit 0 (iicrsv) of iic flag register 0 (iicf0) = 0) to start master device communications when not curr ently using a bus, a communication reservation can be made to enable transmission of a start condition when the bus is released. there are two modes under which the bus is not used. ? when arbitration results in neither master nor slave operation ? when an extension code is received and slave operation is disabled (ack is not returned and the bus was released when bit 6 (lrel0) of iic control register 0 (iicc0) was set to 1). if bit 1 (stt0) of iicc0 is set to 1 while the bus is not used (after a stop condition is detected), a start condition is automatically generated and wait state is set. if an address is written to iic shift register 0 (iic0) afte r bit 4 (spie0) of iicc0 was set to 1, and it was detected by generation of an interrupt request signal (intiic0) that the bus was released (detection of the stop condition), then the device automatically starts communi cation as the master. data written to iic0 before the stop condition is det ected is invalid. when stt0 has been set to 1, the operation mode (as st art condition or as communication reservation) is determined according to the bus status. ? if the bus has been released .........................................a start c ondition is generated ? if the bus has not been released (stand by mode) .........communica tion reservation check whether the communication reservation operates or not by using msts0 (bit 7 of iic status register 0 (iics0)) after stt0 is set to 1 and the wait time elapses. the wait periods, which should be set via software, are listed in table 16-6. table 16-6. wait periods clx0 smc0 cl01 cl00 wait period 0 0 0 0 46 clocks 0 0 0 1 86 clocks 0 0 1 0 172 clocks 0 0 1 1 34 clocks 0 1 0 0 0 1 0 1 30 clocks 0 1 1 0 60 clocks 0 1 1 1 12 clocks 1 1 0 0 1 1 0 1 18 clocks 1 1 1 0 36 clocks figure 16-20 shows the communication reservation timing. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 414 figure 16-20. communication reservation timing 2 1 3456 2 1 3456 789 scl0 sda0 program processing hardware processing write to iic0 set spd0 and intiic0 stt0 = 1 communi- cation reservation set std0 generate by master device with bus mastership remark iic0: iic shift register 0 stt0: bit 1 of iic control register 0 (iicc0) std0: bit 1 of iic status register 0 (iics0) spd0: bit 0 of iic status register 0 (iics0) communication reservations are accepted via the following timing. after bit 1 (std0) of iic status register 0 (iics0) is set to 1, a communication reservation can be made by setting bit 1 (stt0) of iic control register 0 (iicc0) to 1 before a stop condition is detected. figure 16-21. timing for accep ting communication reservations scl0 sda0 std0 spd0 standby mode figure 16-22 shows the communication reservation protocol. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 415 figure 16-22. communication reservation protocol di set1 stt0 define communication reservation wait msts0 = 0? (communication reservation) note yes no (generate start condition) cancel communication reservation mov iic0, # h ei sets stt0 flag (communication reservation) defines that communication reservation is in effect (defines and sets user flag to any part of ram) secures wait period set by software (see table 16-6 ). confirmation of communication reservation clear user flag iic0 write operation note the communication reservation operation executes a write to iic shift register 0 (iic0) when a stop condition interrupt request occurs. remark stt0: bit 1 of iic control register 0 (iicc0) msts0: bit 7 of iic status register 0 (iics0) iic0: iic shift register 0 (2) when communication reservation function is disabled (b it 0 (iicrsv) of iic flag register 0 (iicf0) = 1) when bit 1 (stt0) of iic control register 0 (iicc0) is se t to 1 when the bus is not used in a communication during bus communication, this request is rejected and a start condition is not generated. the following two statuses are included in the st atus where bus is not used. ? when arbitration results in neither master nor slave operation ? when an extension code is received and slave operation is disabled (ack is not returned and the bus was released when bit 6 (lrel0) of iicc0 was set to 1) to confirm whether the start conditi on was generated or request was rejected, check stcf (bit 7 of iicf0). the time shown in table 16-7 is required until stcf is se t to 1 after setting stt0 = 1. therefore, secure the time by software. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 416 table 16-7. wait periods cl01 cl00 wait period 0 0 6 clocks 0 1 6 clocks 1 0 12 clocks 1 1 3 clocks 16.5.15 cautions (1) when stcen (bit 1 of iic flag register 0 (iicf0)) = 0 immediately after i 2 c operation is enabled (iice0 = 1), the bus comm unication status (iicbsy (bit 6 of iicf0) = 1) is recognized regardless of the actual bus status. when changing from a mode in which no stop condition has been detected to a master device communication mo de, first generate a stop condition to release the bus, then perform master device communication. when using multiple masters, it is not possible to per form master device communication when the bus has not been released (when a stop condition has not been detected). use the following sequence for generating a stop condition. <1> set iic clock selection register 0 (iiccl0). <2> set bit 7 (iice0) of iic c ontrol register 0 (iicc0) to 1. <3> set bit 0 (spt0) of iicc0 to 1. (2) when stcen = 1 immediately after i 2 c operation is enabled (iice0 = 1), the bus released status (iicbsy = 0) is recognized regardless of the actual bus status. to generate the first start condition (stt0 (bit 1 of iic control register 0 (iicc0)) = 1), it is necessary to confirm that the bus has been releas ed, so as to not disturb other communications. (3) if other i 2 c communications are already in progress if i 2 c operation is enabled and the device participates in communication already in progress when the sda0 pin is low and the scl0 pin is high, the macro of i 2 c recognizes that the sda0 pin has gone low (detects a start condition). if the value on the bus at this time ca n be recognized as an extension code, ack is returned, but this interferes with other i 2 c communications. to avoid this, start i 2 c in the following sequence. <1> clear bit 4 (spie0) of iicc0 to 0 to disable gener ation of an interrupt request signal (intiic0) when the stop condition is detected. <2> set bit 7 (iice0) of iicc0 to 1 to enable the operation of i 2 c. <3> wait for detection of the start condition. <4> set bit 6 (lrel0) of iicc0 to 1 before ack is returned (4 to 80 clocks after setting iice0 to 1), to forcibly disable detection. (4) determine the transfer clock frequency by using smc0, cl 01, cl00 (bits 3, 1, and 0 of iicl0), and clx0 (bit 0 of iicx0) before enabling the operation (iice0 = 1). to change the transfer clock frequency, clear iice0 to 0 once. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 417 (5) setting stt0 and spt0 (bits 1 and 0 of iicc0) again after they are set and before they are cleared to 0 is prohibited. (6) when transmission is reserved, set spie0 (bit 4 of iic l0) to 1 so that an interrupt request is generated when the stop condition is detected. transfe r is started when communication data is written to iic0 after the interrupt request is generated. unless the interrupt is generat ed when the stop condition is detected, the device stops in the wait state because the interrupt request is not generated when communicati on is started. however, it is not necessary to set spie0 to 1 when msts0 (bit 7 of iics0) is detected by software. 16.5.16 communication operations the following shows three operatio n procedures with the flowchart. (1) master operation in single master system the flowchart when using the 78k0/kc2 as the mast er in a single master system is shown below. this flowchart is broadly divided into the initial setti ngs and communication processing. execute the initial settings at startup. if communication with the slave is required, prepare the communication and then execute communication processing. (2) master operation in multimaster system in the i 2 c bus multimaster system, whethe r the bus is released or us ed cannot be ju dged by the i 2 c bus specifications when the bus takes part in a communication. here, when data and clock are at a high level for a certain period (1 frame), the 78k0/kc2 takes par t in a communication with bus released state. this flowchart is broadly divided into the initial setti ngs, communication waiting, and communication processing. the processing when the 78k0/kc2 loos es in arbitration and is specified as the slave is omitted here, and only the processing as the master is shown. execute the initial settings at star tup to take part in a communication. then, wait for the communication request as the master or wait for the specif ication as the slave. the actual communication is performed in the communication proce ssing, and it supports the transmission/reception with the slave and the arbitrat ion with other masters. (3) slave operation an example of when the 78k0/kc2 is used as the i 2 c bus slave is shown below. when used as the slave, operation is st arted by an interrupt. execute the in itial settings at startup, then wait for the intiic0 interrupt occurrence (communication waiting). when an intiic0 interrupt occurs, the communication status is judged and its result is passed as a flag over to the main processing. by checking the flags, necessary communication processing is performed. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 418 (1) master operation in single-master system figure 16-23. master operation in single-master system spt0 = 1 spt0 = 1 wrel0 = 1 start end acke0 = 0 wtim0 = wrel0 = 1 no no yes no no no yes yes yes yes stcen = 1? acke0 = 1 wtim0 = 0 trc0 = 1? ackd0 = 1? ackd0 = 1? no yes no yes yes no yes no yes no yes no yes no stt0 = 1 iicx0 0xh iiccl0 xxh iicf0 0xh setting stcen, iicrsv = 0 iicc0 xxh acke0 = wtim0 = spie0 = 1 iice0 = 1 setting port initializing i 2 c bus note sva0 xxh writing iic0 writing iic0 reading iic0 intiic0 interrupt occurs? end of transfer? end of transfer? restart? sets each pin in the i 2 c mode (see 16.3 (7) port mode register 6 (pm6) ). selects a transfer clock. sets a local address. sets a start condition. prepares for starting communication (generates a start condition). starts communication (specifies an address and transfer direction). waits for detection of acknowledge. waits for data transmission. starts transmission. communication processing initial setting starts reception. waits for data reception. intiic0 interrupt occurs? waits for detection of acknowledge. prepares for starting communication (generates a stop condition). waits for detection of the stop condition. intiic0 interrupt occurs? intiic0 interrupt occurs? intiic0 interrupt occurs? note release (scl0 and sda0 pins = high level) the i 2 c bus in conformance with t he specifications of the product that is communicating. if eeprom is outputting a low level to the sda0 pin, for example, set the scl0 pin in the output port mode, and output a clock pulse from the output port until the sda0 pin is constantly at high level. remark conform to the specifications of the product that is communicating, with respect to the transmission and reception formats. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 419 (2) master operation in multi-master system figure 16-24. master operation in multi-master system (1/3) iicx0 0xh iiccl0 xxh iicf0 0xh setting stcen and iicrsv iicc0 xxh acke0 = wtim0 = spie0 = 1 iice0 = 1 setting port spt0 = 1 sva0 xxh spie0 = 1 start slave operation slave operation releases the bus for a specific period. bus status is being checked. yes checking bus status note master operation starts? enables reserving communication. disables reserving communication. spd0 = 1? stcen = 1? iicrsv = 0? a sets each pin in the i 2 c mode (see 16.3 (7) port mode register 6 (pm6) ). selects a transfer clock. sets a local address. sets a start condition. (communication start request) (no communication start request) ? waiting to be specified as a slave by other master ? waiting for a communication start request (depends on user program) prepares for starting communication (generates a stop condition). waits for detection of the stop condition. no yes yes no intiic0 interrupt occurs? intiic0 interrupt occurs? yes no yes no spd0 = 1? yes no slave operation no intiic0 interrupt occurs? yes no 1 b spie0 = 0 yes no waits for a communication request. waits for a communication initial setting note confirm that the bus is released (cld0 bit = 1, dad0 bi t = 1) for a specific period (for example, for a period of one frame). if the sda0 pin is constantly at low level, decide whether to release the i 2 c bus (scl0 and sda0 pins = high level) in conformance with the s pecifications of the produc t that is communicating. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 420 figure 16-24. master operation in multi-master system (2/3) stt0 = 1 wait slave operation yes msts0 = 1? exc0 = 1 or coi0 =1? prepares for starting communication (generates a start condition). secure wait time by software (see table 16-6 ). waits for bus release (communication being reserved). wait state after stop condition was detected and start condition was generated by the communication reservation function. no intiic0 interrupt occurs? yes yes no no a c stt0 = 1 wait slave operation yes iicbsy = 0? exc0 = 1 or coi0 =1? prepares for starting communication (generates a start condition). disables reserving communication. enables reserving communication. secure wait time by software (see table 18-7 ). waits for bus release detects a stop condition. no no intiic0 interrupt occurs? yes yes no yes stcf = 0? no b d c d communication processing communication processing chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 421 figure 16-24. master operation in multi-master system (3/3) writing iic0 wtim0 = 1 wrel0 = 1 reading iic0 acke0 = 1 wtim0 = 0 wtim0 = wrel0 = 1 acke0 = 0 writing iic0 yes trc0 = 1? restart? msts0 = 1? starts communication (specifies an address and transfer direction). starts transmission. no yes waits for data reception. starts reception. yes no intiic0 i nterrupt occurs? yes no transfer end? waits for detection of ack. yes no intiic0 i nterrupt occurs? waits for data transmission. does not participate in communication. yes no intiic0 i nterrupt occurs? no yes ackd0 = 1? no yes no c 2 yes msts0 = 1? no yes transfer end? no yes ackd0 = 1? no 2 yes msts0 = 1? no 2 waits for detection of ack. yes no intiic0 i nterrupt occurs? yes msts0 = 1? no c 2 yes exc0 = 1 or coi0 = 1? no 1 2 spt0 = 1 stt0 = 1 slave operation end communication processing communication processing remarks 1. conform to the specifications of the product that is communicatin g, with respect to the transmission and reception formats. 2. to use the device as a master in a multi-master system, read the msts0 bit each time interrupt intiic0 has occurred to check the arbitration result. 3. to use the device as a slave in a multi-master system, check the status by using the iics0 and iicf0 registers each time interrupt intiic0 has occurr ed, and determine the processing to be performed next. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 422 (3) slave operation the processing procedure of the slave operation is as follows. basically, the slave operation is event-driven. therefor e, processing by the intiic0 interrupt (processing that must substantially change the operation status such as de tection of a stop condition during communication) is necessary. in the following explanation, it is assumed that the extension code is not supported for data communication. it is also assumed that the intiic0 interrupt servicing only performs status transition pr ocessing, and that actual data communication is performed by the main processing. iic0 interrupt servicing main processing intiic0 flag setting data setting therefore, data communication processing is perfo rmed by preparing the following three flags and passing them to the main processing instead of intiic0. <1> communication mode flag this flag indicates the following two communication statuses. ? clear mode: status in which data communication is not performed ? communication mode: status in which data comm unication is performed (from valid address detection to stop condition detection, no detec tion of ack from master, address mismatch) <2> ready flag this flag indicates that data communication is enabled. its function is the same as the intiic0 interrupt for ordinary data communication. this flag is set by interrupt servicing and cleared by the main processing. clear this flag by interrupt servicing when communication is started. however, the ready flag is not set by interrupt servicing when the first data is transmitted. therefore, the first data is transmitted without the flag being cleared (an address match is interpreted as a request for the next data). <3> communication direction flag this flag indicates the direction of communic ation. its value is the same as trc0. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 423 the main processing of the slave operation is explained next. start serial interface iic0 and wait until communication is enabled. when communication is enabled, execute communication by using the communication mode flag an d ready flag (processing of the stop condition and start condition is performed by an interrupt. here, check the status by using the flags). the transmission operation is repeated until the master no longer returns ack. if ack is not returned from the master, communication is completed. for reception, the necessary amount of data is received. when communication is completed, ack is not returned as the next data. after that, the master generat es a stop condition or restart condition. exit from the communication status occurs in this way. figure 16-25. slave operation flowchart (1) yes yes yes yes yes yes yes no no no no no no wrel0 = 1 ackd0 = 1? no yes no yes no start communication mode flag = 1? communication mode flag = 1? communication direction flag = 1? ready flag = 1? communication direction flag = 1? reading iic0 clearing ready flag clearing ready flag communication direction flag = 1? clearing communication mode flag wrel0 = 1 writing iic0 iicc0 xxh acke0 = wtim0 = 1 spie0 = 0, iice0 = 1 sva0 xxh sets a local address. iicx0 0xh iiccl0 xxh selects a transfer clock. iicf0 0xh setting iicrsv sets a start condition. starts transmission. starts reception. communication mode flag = 1? ready flag = 1? setting port sets each pin to the i 2 c mode (see 16.3 (7) port mode register 6 (pm6) ). communication processing initial setting remark conform to the specifications of the product that is in communication, regarding the transmission and reception formats. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 424 an example of the processing procedur e of the slave with the intiic0 inte rrupt is explained below (processing is performed assuming that no extension code is used). the intiic0 interrupt c hecks the status, and the following operations are performed. <1> communication is stopped if the stop condition is issued. <2> if the start condition is issued, the address is c hecked and communication is completed if the address does not match. if the address matches, the communi cation mode is set, wait is cancelled, and processing returns from the interrupt (the ready flag is cleared). <3> for data transmit/receive, only the ready flag is set. processing returns from the interrupt with the i 2 c bus remaining in the wait state. remark <1> to <3> above correspond to <1> to <3> in figure 16-26 slave operation flowchart (2) . figure 16-26. slave operation flowchart (2) yes yes yes no no no intiic0 generated set ready flag interrupt servicing completed spd0 = 1? std0 = 1? coi0 = 1? communication direction flag trc0 set communication mode flag clear ready flag clear c ommunication direction flag, ready flag, and communication mode flag <1> <2> <3> chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 425 16.5.17 timing of i 2 c interrupt request (intiic0) occurrence the timing of transmitting or receiving data and generation of interrupt request signal in tiic0, and the value of the iics0 register when the intiic0 signal is generated are shown below. remark st: start condition ad6 to ad0: address r/w: transfer direction specification ack: acknowledge d7 to d0: data sp: stop condition chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 426 (1) master device operation (a) start ~ address ~ data ~ data ~ stop (transmission/reception) (i) when wtim0 = 0 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp spt0 = 1 3 4 5 2 1 1: iics0 = 1000110b 2: iics0 = 1000000b 3: iics0 = 1000000b (sets wtim0 to 1) note 4: iics0 = 100000b (sets spt0 to 1) note 5: iics0 = 00000001b note to generate a stop condition, set wtim0 to 1 and chan ge the timing for generating the intiic0 interrupt request signal. remark : always generated : generated only when spie0 = 1 : don?t care (ii) when wtim0 = 1 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp spt0 = 1 3 4 2 1 1: iics0 = 1000110b 2: iics0 = 1000100b 3: iics0 = 100000b (sets spt0 to 1) 4: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 427 (b) start ~ address ~ data ~ start ~ address ~ data ~ stop (restart) (i) when wtim0 = 0 st ad6 to ad0 r/w ack d7 to d0 ad6 to ad0 ack ack sp st r/w d7 to d0 ack stt0 = 1 spt0 = 1 3 4 7 2 1 5 6 1: iics0 = 1000110b 2: iics0 = 1000000b (sets wtim0 to 1) note 1 3: iics0 = 100000b (clears wtim0 to 0 note 2 , sets stt0 to 1) 4: iics0 = 1000110b 5: iics0 = 1000000b (sets wtim0 to 1) note 3 6: iics0 = 100000b (sets spt0 to 1) 7: iics0 = 00000001b notes 1. to generate a start condition, set wtim0 to 1 and change the timing for generating the intiic0 interrupt request signal. 2. clear wtim0 to 0 to restore the original setting. 3. to generate a stop condition, set wtim0 to 1 and change the timing for generating the intiic0 interrupt request signal. remark : always generated : generated only when spie0 = 1 : don?t care (ii) when wtim0 = 1 st ad6 to ad0 r/w ack d7 to d0 ad6 to ad0 ack ack sp st r/w d7 to d0 ack stt0 = 1 spt0 = 1 3 4 5 2 1 1: iics0 = 1000110b 2: iics0 = 100000b (sets stt0 to 1) 3: iics0 = 1000110b 4: iics0 = 100000b (sets spt0 to 1) 5: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 428 (c) start ~ code ~ data ~ data ~ stop (extension code transmission) (i) when wtim0 = 0 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp spt0 = 1 3 4 5 2 1 1: iics0 = 1010110b 2: iics0 = 1010000b 3: iics0 = 1010000b (sets wtim0 to 1) note 4: iics0 = 101000b (sets spt0 to 1) 5: iics0 = 00000001b note to generate a stop condition, set wtim0 to 1 and chan ge the timing for generating the intiic0 interrupt request signal. remark : always generated : generated only when spie0 = 1 : don?t care (ii) when wtim0 = 1 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp spt0 = 1 3 4 2 1 1: iics0 = 1010110b 2: iics0 = 1010100b 3: iics0 = 101000b (sets spt0 to 1) 4: iics0 = 00001001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 429 (2) slave device operation (slave address data reception) (a) start ~ address ~ data ~ data ~ stop (i) when wtim0 = 0 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp 3 4 2 1 1: iics0 = 0001110b 2: iics0 = 0001000b 3: iics0 = 0001000b 4: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care (ii) when wtim0 = 1 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp 3 4 2 1 1: iics0 = 0001110b 2: iics0 = 0001100b 3: iics0 = 000100b 4: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 430 (b) start ~ address ~ data ~ start ~ address ~ data ~ stop (i) when wtim0 = 0 (after restart, matches with sva0) st ad6 to ad0 r/w ack d7 to d0 ad6 to ad0 ack ack sp st r/w d7 to d0 ack 3 4 5 2 1 1: iics0 = 0001110b 2: iics0 = 0001000b 3: iics0 = 0001110b 4: iics0 = 0001000b 5: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care (ii) when wtim0 = 1 (after restart, matches with sva0) st ad6 to ad0 r/w ack d7 to d0 ad6 to ad0 ack ack sp st r/w d7 to d0 ack 3 4 5 2 1 1: iics0 = 0001110b 2: iics0 = 000100b 3: iics0 = 0001110b 4: iics0 = 000100b 5: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 431 (c) start ~ address ~ data ~ start ~ code ~ data ~ stop (i) when wtim0 = 0 (after restart, does not match address (= extension code)) st ad6 to ad0 r/w ack d7 to d0 ad6 to ad0 ack ack sp st r/w d7 to d0 ack 3 4 5 2 1 1: iics0 = 0001110b 2: iics0 = 0001000b 3: iics0 = 0010010b 4: iics0 = 0010000b 5: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care (ii) when wtim0 = 1 (after restart, does not match address (= extension code)) st ad6 to ad0 r/w ack d7 to d0 ad6 to ad0 ack ack sp st r/w d7 to d0 ack 3 5 6 2 1 4 1: iics0 = 0001110b 2: iics0 = 000100b 3: iics0 = 0010010b 4: iics0 = 0010110b 5: iics0 = 001000b 6: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 432 (d) start ~ address ~ data ~ start ~ address ~ data ~ stop (i) when wtim0 = 0 (after restart, does not match address (= not extension code)) st ad6 to ad0 r/w ack d7 to d0 ad6 to ad0 ack ack sp st r/w d7 to d0 ack 3 4 2 1 1: iics0 = 0001110b 2: iics0 = 0001000b 3: iics0 = 00000110b 4: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care (ii) when wtim0 = 1 (after restart, does not match address (= not extension code)) st ad6 to ad0 r/w ack d7 to d0 ad6 to ad0 ack ack sp st r/w d7 to d0 ack 3 4 2 1 1: iics0 = 0001110b 2: iics0 = 000100b 3: iics0 = 00000110b 4: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 433 (3) slave device operation (w hen receiving extension code) the device is always participating in communication when it receives an extension code. (a) start ~ code ~ data ~ data ~ stop (i) when wtim0 = 0 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp 3 4 2 1 1: iics0 = 0010010b 2: iics0 = 0010000b 3: iics0 = 0010000b 4: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care (ii) when wtim0 = 1 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp 3 4 5 2 1 1: iics0 = 0010010b 2: iics0 = 0010110b 3: iics0 = 0010100b 4: iics0 = 001000b 5: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 434 (b) start ~ code ~ data ~ start ~ address ~ data ~ stop (i) when wtim0 = 0 (after restart, matches sva0) st ad6 to ad0 r/w ack d7 to d0 ad6 to ad0 ack ack sp st r/w d7 to d0 ack 3 4 5 2 1 1: iics0 = 0010010b 2: iics0 = 0010000b 3: iics0 = 0001110b 4: iics0 = 0001000b 5: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care (ii) when wtim0 = 1 (after restart, matches sva0) st ad6 to ad0 r/w ack d7 to d0 ad6 to ad0 ack ack sp st r/w d7 to d0 ack 3 4 6 2 1 5 1: iics0 = 0010010b 2: iics0 = 0010110b 3: iics0 = 001000b 4: iics0 = 0001110b 5: iics0 = 000100b 6: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 435 (c) start ~ code ~ data ~ start ~ code ~ data ~ stop (i) when wtim0 = 0 (after restart, extension code reception) st ad6 to ad0 r/w ack d7 to d0 ad6 to ad0 ack ack sp st r/w d7 to d0 ack 3 4 5 2 1 1: iics0 = 0010010b 2: iics0 = 0010000b 3: iics0 = 0010010b 4: iics0 = 0010000b 5: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care (ii) when wtim0 = 1 (after restart, extension code reception) st ad6 to ad0 r/w ack d7 to d0 ad6 to ad0 ack ack sp st r/w d7 to d0 ack 3 4 7 2 1 5 6 1: iics0 = 0010010b 2: iics0 = 0010110b 3: iics0 = 001000b 4: iics0 = 0010010b 5: iics0 = 0010110b 6: iics0 = 001000b 7: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 436 (d) start ~ code ~ data ~ start ~ address ~ data ~ stop (i) when wtim0 = 0 (after restart, does not match address (= not extension code)) st ad6 to ad0 r/w ack d7 to d0 ad6 to ad0 ack ack sp st r/w d7 to d0 ack 3 4 2 1 1: iics0 = 00100010b 2: iics0 = 00100000b 3: iics0 = 00000110b 4: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care (ii) when wtim0 = 1 (after restart, does not match address (= not extension code)) st ad6 to ad0 r/w ack d7 to d0 ad6 to ad0 ack ack sp st r/w d7 to d0 ack 3 4 5 2 1 1: iics0 = 00100010b 2: iics0 = 00100110b 3: iics0 = 0010000b 4: iics0 = 00000110b 5: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 437 (4) operation without communication (a) start ~ code ~ data ~ data ~ stop st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp 1 1: iics0 = 00000001b remark : generated only when spie0 = 1 (5) arbitration loss operation (opera tion as slave after arbitration loss) when the device is used as a master in a multi-master system, read the ms ts0 bit each time interrupt request signal intiic0 has occurred to check the arbitration result. (a) when arbitration loss occurs durin g transmission of slave address data (i) when wtim0 = 0 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp 3 4 2 1 1: iics0 = 0101110b 2: iics0 = 0001000b 3: iics0 = 0001000b 4: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 438 (ii) when wtim0 = 1 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp 3 4 2 1 1: iics0 = 0101110b 2: iics0 = 0001100b 3: iics0 = 000100b 4: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care (b) when arbitration loss occurs dur ing transmission of extension code (i) when wtim0 = 0 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp 3 4 2 1 1: iics0 = 0110010b 2: iics0 = 0010000b 3: iics0 = 0010000b 4: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 439 (ii) when wtim0 = 1 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp 3 4 5 2 1 1: iics0 = 0110010b 2: iics0 = 0010110b 3: iics0 = 0010100b 4: iics0 = 001000b 5: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care (6) operation when arbitration loss occurs (no communication after arbitration loss) when the device is used as a master in a multi-master system, read the ms ts0 bit each time interrupt request signal intiic0 has occurred to check the arbitration result. (a) when arbitration loss occu rs during transmission of slave address data (when wtim0 = 1) st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp 2 1 1: iics0 = 01000110b 2: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 440 (b) when arbitration loss occurs dur ing transmission of extension code st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp 2 1 1: iics0 = 0110010b sets lrel0 = 1 by software 2: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care (c) when arbitration loss occu rs during transmission of data (i) when wtim0 = 0 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp 3 2 1 1: iics0 = 10001110b 2: iics0 = 01000000b 3: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 441 (ii) when wtim0 = 1 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack ack sp 3 2 1 1: iics0 = 10001110b 2: iics0 = 01000100b 3: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 (d) when loss occurs due to rest art condition during data transfer (i) not extension code (example: does not match with sva0) st ad6 to ad0 r/w ack d7 to dn ad6 to ad0 ack sp st r/w d7 to d0 ack 3 2 1 1: iics0 = 1000110b 2: iics0 = 01000110b 3: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care n = 6 to 0 chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 442 (ii) extension code st ad6 to ad0 r/w ack d7 to dn ad6 to ad0 ack sp st r/w d7 to d0 ack 3 2 1 1: iics0 = 1000110b 2: iics0 = 01100010b sets lrel0 = 1 by software 3: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care n = 6 to 0 (e) when loss occurs due to st op condition during data transfer st ad6 to ad0 r/w ack d7 to dn sp 2 1 1: iics0 = 10000110b 2: iics0 = 01000001b remark : always generated : generated only when spie0 = 1 : don?t care n = 6 to 0 chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 443 (f) when arbitration loss occurs due to low-level da ta when attempting to generate a restart condition (i) when wtim0 = 0 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack sp ack d7 to d0 ack stt0 = 1 3 4 5 2 1 1: iics0 = 1000110b 2: iics0 = 1000000b (sets wtim0 to 1) 3: iics0 = 1000100b (clears wtim0 to 0) 4: iics0 = 01000000b 5: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care (ii) when wtim0 = 1 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack sp ack d7 to d0 ack stt0 = 1 3 4 2 1 1: iics0 = 1000110b 2: iics0 = 1000100b (sets stt0 to 1) 3: iics0 = 01000100b 4: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 444 (g) when arbitration loss occurs due to a stop condition when attempting to generate a restart condition (i) when wtim0 = 0 st ad6 to ad0 r/w ack d7 to d0 ack sp stt0 = 1 3 4 2 1 1: iics0 = 1000110b 2: iics0 = 1000000b (sets wtim0 to 1) 3: iics0 = 100000b (sets stt0 to 1) 4: iics0 = 01000001b remark : always generated : generated only when spie0 = 1 : don?t care (ii) when wtim0 = 1 st ad6 to ad0 r/w ack d7 to d0 ack sp stt0 = 1 2 3 1 1: iics0 = 1000110b 2: iics0 = 100000b (sets stt0 to 1) 3: iics0 = 01000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 445 (h) when arbitration loss occurs due to low-level data when attemp ting to generate a stop condition (i) when wtim0 = 0 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack sp ack d7 to d0 ack spt0 = 1 3 4 5 2 1 1: iics0 = 1000110b 2: iics0 = 1000000b (sets wtim0 to 1) 3: iics0 = 1000100b (clears wtim0 to 0) 4: iics0 = 01000100b 5: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care (ii) when wtim0 = 1 st ad6 to ad0 r/w ack d7 to d0 d7 to d0 ack sp ack d7 to d0 ack spt0 = 1 3 4 2 1 1: iics0 = 1000110b 2: iics0 = 1000100b (sets spt0 to 1) 3: iics0 = 01000100b 4: iics0 = 00000001b remark : always generated : generated only when spie0 = 1 : don?t care chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 446 16.6 timing charts when using the i 2 c bus mode, the master device outputs an address via the serial bus to select one of several slave devices as its communication partner. after outputting the slave address, the mast er device transmits the trc0 bit (bit 3 of iic status register 0 (iics0)), which specifies the data transfer di rection, and then starts serial communication with the slave device. figures 16-27 and 16-28 show timing charts of the data communication. iic shift register 0 (iic0)?s shift operation is synchronized with the falling edge of the serial clock (scl0). the transmit data is transferred to the so0 latch a nd is output (msb first) via the sda0 pin. data input via the sda0 pin is captured into iic0 at the rising edge of scl0. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 447 figure 16-27. example of master to slave communication (when 9-clock wait is selected fo r both master and slave) (1/3) (1) start condition ~ address iic0 ackd0 std0 spd0 wtim0 h h l l l l h h h l l acke0 msts0 stt0 spt0 wrel0 intiic0 trc0 iic0 ackd0 std0 spd0 wtim0 acke0 msts0 stt0 spt0 wrel0 intiic0 trc0 scl0 sda0 processing by master device transfer lines processing by slave device 123456789 4 3 2 1 ad6 ad5 ad4 ad3 ad2 ad1 ad0 w ack d4 d5 d6 d7 iic0 address iic0 data iic0 ffh transmit start condition receive (when exc0 = 1) note note note to cancel slave wait, write ?ffh? to iic0 or set wrel0. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 448 figure 16-27. example of master to slave communication (when 9-clock wait is selected fo r both master and slave) (2/3) (2) data iic0 ackd0 std0 spd0 wtim0 h h l l l l l l h h h h l l l l l acke0 msts0 stt0 spt0 wrel0 intiic0 trc0 iic0 ackd0 std0 spd0 wtim0 acke0 msts0 stt0 spt0 wrel0 intiic0 trc0 scl0 sda0 processing by master device transfer lines processing by slave device 1 9 8 23456789 3 2 1 d7 d0 d6 d5 d4 d3 d2 d1 d0 d5 d6 d7 iic0 data iic0 ffh iic0 ffh iic0 data transmit receive note note ack ack note note note to cancel slave wait, write ?ffh? to iic0 or set wrel0. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 449 figure 16-27. example of master to slave communication (when 9-clock wait is selected fo r both master and slave) (3/3) (3) stop condition iic0 ackd0 std0 spd0 wtim0 h h l l l l h h h l acke0 msts0 stt0 spt0 wrel0 intiic0 trc0 iic0 ackd0 std0 spd0 wtim0 acke0 msts0 stt0 spt0 wrel0 intiic0 trc0 scl0 sda0 processing by master device transfer lines processing by slave device 123456789 2 1 d7 d6 d5 d4 d3 d2 d1 d0 ad5 ad6 iic0 data iic0 address iic0 ffh note iic0 ffh note stop condition start condition transmit note note (when spie0 = 1) receive (when spie0 = 1) ack note to cancel slave wait, write ?ffh? to iic0 or set wrel0. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 450 figure 16-28. example of slave to master communication (when 8-clock wait is selected for master, 9-clock wait is selected for slave) (1/3) (1) start condition ~ address iic0 ackd0 std0 spd0 wtim0 h h l l l h l acke0 msts0 stt0 l l spt0 wrel0 intiic0 trc0 iic0 ackd0 std0 spd0 wtim0 acke0 msts0 stt0 spt0 wrel0 intiic0 trc0 scl0 sda0 processing by master device transfer lines processing by slave device 123456789 4 56 3 2 1 ad6 ad5 ad4 ad3 ad2 ad1 ad0 r d4 d3 d2 d5 d6 d7 iic0 address iic0 ffh note note iic0 data start condition ack note to cancel master wait, write ?ffh? to iic0 or set wrel0. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 451 figure 16-28. example of slave to master communication (when 8-clock wait is selected for master, 9-clock wait is selected for slave) (2/3) (2) data iic0 ackd0 std0 spd0 wtim0 h h h l l l l l l l h h l l l l l acke0 msts0 stt0 spt0 wrel0 intiic0 trc0 iic0 ackd0 std0 spd0 wtim0 acke0 msts0 stt0 spt0 wrel0 intiic0 trc0 scl0 sda0 processing by master device transfer lines processing by slave device 1 89 23456789 3 2 1 d7 d0 ack d6 d5 d4 d3 d2 d1 d0 ack d5 d6 d7 note note receive transmit iic0 data iic0 data iic0 ffh note iic0 ffh note note to cancel master wait, write ?ffh? to iic0 or set wrel0. chapter 16 serial interface iic0 user?s manual u17336ej5v0ud 452 figure 16-28. example of slave to master communication (when 8-clock and 9-clock wait is selected for m aster, 9-clock wait is selected for slave) (3/3) (3) stop condition iic0 ackd0 std0 spd0 wtim0 h h l l l acke0 msts0 stt0 spt0 wrel0 intiic0 trc0 iic0 ackd0 std0 spd0 wtim0 acke0 msts0 stt0 spt0 wrel0 intiic0 trc0 scl0 sda0 processing by master device transfer lines processing by slave device 12345678 9 1 d7 d6 d5 d4 d3 d2 d1 d0 ad6 iic0 address iic0 ffh note note iic0 data stop condition start condition (when spie0 = 1) nack (when spie0 = 1) note to cancel master wait, write ?ffh? to iic0 or set wrel0. user?s manual u17336ej5v0ud 453 chapter 17 multiplier/divider ( pd78f0514, 78f0515, and 78f0515d only) only for the pd78f0514, 78f0515, and 78 f0515d, the multiplier/d ivider is provided. caution do not use serial interface iic0 and the mult iplier/divider simultaneous ly, because various flags corresponding to interrupt request sources ar e shared among serial interface iic0 and the multiplier/divider. 17.1 functions of multiplier/divider the multiplier/divider has the following functions. ? 16 bits 16 bits = 32 bits (multiplication) ? 32 bits 16 bits = 32 bits, 16-bit remainder (division) 17.2 configuration of multiplier/divider the multiplier/divider incl udes the following hardware. table 17-1. configuration of multiplier/divider item configuration registers remainder data register 0 (sdr0) multiplication/division data r egisters a0 (mda0h, mda0l) multiplication/division dat a registers b0 (mdb0) control register multiplier/divider control register 0 (dmuc0) figure 17-1 shows the block diagram of the multiplier/divider. chapter 17 multiplier/divider ( pd78f0514, 78f0515, and 78f0515d only) user?s manual u17336ej5v0ud 454 figure 17-1. block diagra m of multiplier/divider internal bus f prs start clear 17-bit adder controller multiplication/division data register b0 (mdb0 (mdb0h + mdb0l)) remainder data register 0 (sdr0 (sdr0h + sdr0l)) 6-bit counter dmusel0 multiplier/divider control register 0 (dmuc0) controller multiplication/division data register a0 ( mda0h (mda0hh + mda0hl) + mda0l (mda0lh + mda0ll) ) controller dmue mda000 intdmu chapter 17 multiplier/divider ( pd78f0514, 78f0515, and 78f0515d only) user?s manual u17336ej5v0ud 455 (1) remainder data register 0 (sdr0) sdr0 is a 16-bit register that stores a remainder. th is register stores 0 in the multiplication mode and the remainder of an operation result in the division mode. sdr0 can be read by an 8-bit or 16-bit memory manipulation instruction. reset signal generation sets sdr0 to 0000h. figure 17-2. format of remainder data register 0 (sdr0) address: ff60h, ff61h after reset: 0000h r symbol ff61h (sdr0h) ff60h (sdr0l) sdr0 sdr 015 sdr 014 sdr 013 sdr 012 sdr 011 sdr 010 sdr 009 sdr 008 sdr 007 sdr 006 sdr 005 sdr 004 sdr 003 sdr 002 sdr 001 sdr 000 cautions 1. the value read from sdr0 duri ng operation processing (while bit 7 (dmue) of multiplier/divider control register 0 (dmuc0) is 1) is not guaranteed. 2. sdr0 is reset when the operation is started (when dmue is set to 1). (2) multiplication/division data register a0 (mda0h, mda0l) mda0 is a 32-bit register that sets a 16-bit multiplier a in the multiplication mode and a 32-bit dividend in the division mode, and stores the 32-bit result of the oper ation (higher 16 bits: mda0h, lower 16 bits: mda0l). figure 17-3. format of mult iplication/division data regi ster a0 (mda0h, mda0l) address: ff62h, ff63h, ff64h, ff65h after reset: 0000h, 0000h r/w symbol ff65h (mda0hh) ff64h (mda0hl) mda0h mda 031 mda 030 mda 029 mda 028 mda 027 mda 026 mda 025 mda 024 mda 023 mda 022 mda 021 mda 020 mda 019 mda 018 mda 017 mda 016 symbol ff63h (mda0lh) ff62h (mda0ll) mda0l mda 015 mda 014 mda 013 mda 012 mda 011 mda 010 mda 009 mda 008 mda 007 mda 006 mda 005 mda 004 mda 003 mda 002 mda 001 mda 000 cautions 1. mda0h is cleared to 0 when an operation is starte d in the multiplication mode (when multiplier/divider control regist er 0 (dmuc0) is set to 81h). 2. do not change the value of mda0 duri ng operation processing (whi le bit 7 (dmue) of multiplier/divider control regi ster 0 (dmuc0) is 1). even in this case, the operation is executed, but the result is undefined. 3. the value read from mda0 during operation processi ng (while dmue is 1) is not guaranteed. chapter 17 multiplier/divider ( pd78f0514, 78f0515, and 78f0515d only) user?s manual u17336ej5v0ud 456 the functions of mda0 when an operation is executed are shown in the table below. table 17-2. functions of mda0 during operation execution dmusel0 operation mode setting operation result 0 division mode di vidend division result (quotient) 1 multiplication mode higher 16 bits: 0, lower 16 bits: multiplier a multiplication result (product) remark dmusel0: bit 0 of multiplier/divider control register 0 (dmuc0) the register configuration differs between when multiplication is executed and when division is executed, as follows. ? register configuration during multiplication chapter 17 multiplier/divider ( pd78f0514, 78f0515, and 78f0515d only) user?s manual u17336ej5v0ud 457 17.3 register controlling multiplier/divider the multiplier/divider is controlled by mult iplier/divider control register 0 (dmuc0). (1) multiplier/divider c ontrol register 0 (dmuc0) dmuc0 is an 8-bit register that controls the operation of the multiplier/divider. dmuc0 can be set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets dmuc0 to 00h. figure 17-5. format of multiplier/divider control register 0 (dmuc0) dmue dmuc0 0 0 0 0 0 0 dmusel0 stops operation starts operation dmue note 0 1 operation start/stop division mode multiplication mode dmusel0 0 1 operation mode (multiplication/division) selection address: ff68h after reset: 00h r/w symbol 4 3 2 1 0 6 <7> 5 note when dmue is set to 1, the operati on is started. dmue is automatically cleared to 0 after the operation is complete. cautions 1. if dmue is cleared to 0 during ope ration processing (when dmue is 1), the operation result is not guaranteed. if the operation is comp leted while the clearing instruction is being executed, the operation result is guaranteed, provided that the interrupt flag is set. 2. do not change the value of dmusel0 during operation processing (w hile dmue is 1). if it is changed, undefined operation r esults are stored in multiplicat ion/division data register a0 (mda0) and remainder data register 0 (sdr0). 3. if dmue is cleared to 0 during opera tion processing (while dmue is 1), the operation processing is stopped. to execute the operati on again, set multiplication/division data register a0 (mda0), multiplication/division data register b0 (mdb0), and multiplier/divider control register 0 (dmuc0), and star t the operation (by setting dmue to 1). chapter 17 multiplier/divider ( pd78f0514, 78f0515, and 78f0515d only) user?s manual u17336ej5v0ud 458 17.4 operations of multiplier/divider 17.4.1 multiplication operation ? initial setting 1. set operation data to multiplicati on/division data register a0l (mda0l) a nd multiplication/division data register b0 (mdb0). 2. set bits 0 (dmusel0) and 7 (dmue) of multiplier/divi der control register 0 (dmuc0) to 1. operation will start. ? during operation 3. the operation will be completed when 16 peripheral hardware clocks (f prs ) have been issued after the start of the operation (intermediate data is st ored in the mda0l and mda0h register s during operation, and therefore the read values of these r egisters are not guaranteed). ? end of operation 4. the operation result data is stor ed in the mda0l and mda0h registers. 5. dmue is cleared to 0 (end of operation). 6. after the operation, an interrup t request signal (intdmu) is generated. ? next operation 7. to execute multiplication next, start from the initial setting in 17.4.1 multiplication operation . 8. to execute division next, start from the initial setting in 17.4.2 division operation . chapter 17 multiplier/divider ( pd78f0514, 78f0515, and 78f0515d only) user?s manual u17336ej5v0ud 459 figure 17-6. timing chart of multiplication operation (00dah 0093h) f prs mda0 sdr0 mdb0 1 2 345 6 78 9a b cd e f 10 0 0 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 006d 0000 00da xxxx 00da xxxx xxxx xxxx 0049 8036 0024 c01b 005b e00d 0077 7006 003b b803 0067 5c01 007d 2e00 003e 9700 001f 4b80 000f a5c0 0007 d2e0 0003 e970 0001 f4b8 0000 fa5c 0000 7d2e 0093 xxxx internal clock dmue dmusel0 counter intdmu chapter 17 multiplier/divider ( pd78f0514, 78f0515, and 78f0515d only) user?s manual u17336ej5v0ud 460 17.4.2 division operation ? initial setting 1. set operation data to multiplicati on/division data register a0 (mda0l and mda0h) and multiplication/division data register b0 (mdb0). 2. set bits 0 (dmusel0) and 7 (dmue) of multiplier/divider control register 0 (dmuc0) to 0 and 1, respectively. operation will start. ? during operation 3. the operation will be completed when 32 peripheral hardware clocks (f prs ) have been issued after the start of the operation (intermediate data is stored in the mda0l and mda0h registers and remainder data register 0 (sdr0) during operation, and theref ore the read values of these registers are not guaranteed). ? end of operation 4. the result data is stored in th e mda0l, mda0h, and sdr0 registers. 5. dmue is cleared to 0 (end of operation). 6. after the operation, an interrup t request signal (intdmu) is generated. ? next operation 7. to execute multiplication next, start from the initial setting in 17.4.1 multiplication operation . 8. to execute division next, start from the initial setting in 17.4.2 division operation . chapter 17 multiplier/divider ( pd78f0514, 78f0515, and 78f0515d only) user?s manual u17336ej5v0ud 461 figure 17-7. timing chart of division operation (dcba2586h 0018h) f prs mda0 sdr0 mdb0 12345678 19 1a 1b 1c 1d 1e 1f 20 0 0 0000 0001 0003 0006 000d 0003 0007 000e 0004 000b 0016 0014 0010 0008 0011 000b 0016 b974 4b0c dcba 2586 xxxx xxxx xxxx 72e8 9618 e5d1 2c30 cba2 5860 9744 b0c1 2e89 6182 5d12 c304 ba25 8609 0c12 64d8 1824 c9b0 3049 9361 6093 26c3 c126 4d87 824c 9b0e 0499 361d 0932 6c3a 0018 xxxx internal clock dmue dmusel0 counter intdmu ?0? user?s manual u17336ej5v0ud 462 chapter 18 interrupt functions 18.1 interrupt function types the following two types of inte rrupt functions are used. (1) maskable interrupts these interrupts undergo mask control. maskable interrup ts can be divided into a high interrupt priority group and a low interrupt priority group by setting the priority specification flag registers (pr0l, pr0h, pr1l, pr1h). multiple interrupt servicing can be applied to low-priority interrupts when high-priority interrupts are generated. if two or more interrupt requests, each having the same priority, are simultaneously generated, then they are processed according to the priority of vectored in terrupt servicing. for the priority order, see table 18-1 . a standby release signal is generated a nd stop and halt modes are released. external interrupt requests and internal interrupt requests are provided as maskable interrupts. ? 38-pin and 44-pin products external: 7, internal: 16 ? 48-pin products external: 8, internal: 16 (2) software interrupt this is a vectored interrupt generated by executing the brk instruction. it is acknowledged even when interrupts are disabled. the software interrupt does not undergo interrupt priority control. 18.2 interrupt sources and configuration the 78k0/kc2 products have a total of 24 interrupt sources in the 38-pin and 44-pin products, 25 interrupt sources in the 48-pin products, including maskable interrupts and software interrupts. in addition, they also have up to four reset sources (see table 18-1 ). chapter 18 interrupt functions user?s manual u17336ej5v0ud 463 table 18-1. interrupt source list (1/2) interrupt source interrupt type default priority note 1 name trigger internal/ external vector table address basic configuration type note 2 0 intlvi low-voltage detection note 3 internal 0004h (a) 1 intp0 0006h 2 intp1 0008h 3 intp2 000ah 4 intp3 000ch 5 intp4 000eh 6 intp5 pin input edge detection external 0010h (b) 7 intsre6 uart6 reception error generation 0012h 8 intsr6 end of uart6 reception 0014h 9 intst6 end of uart6 transmission 0016h 10 intcsi10/ intst0 end of csi10 communication/end of uart0 transmission 0018h 11 inttmh1 match between tmh1 and cmp01 (when compare register is specified) 001ah 12 inttmh0 match between tmh0 and cmp00 (when compare register is specified) 001ch 13 inttm50 match between tm50 and cr50 (when compare register is specified) 001eh 14 inttm000 match between tm00 and cr000 (when compare register is specified), ti010 pin valid edge detection (when capture register is specified) 0020h 15 inttm010 match between tm00 and cr010 (when compare register is specified), ti000 pin valid edge detection (when capture register is specified) 0022h 16 intad end of a/d conversion 0024h 17 intsr0 end of uart0 reception or reception error generation 0026h 18 intwti watch timer referenc e time interval signal 0028h 19 inttm51 note 4 match between tm51 and cr51 (when compare register is specified) internal 002ah (a) 20 intkr key interrupt detection external 002ch (c) 21 intwt watch timer overflow internal 002eh (a) maskable 22 intp6 note 5 pin input edge detection external 0030h (b) notes 1. the default priority determines t he sequence of processing vectored in terrupts if two or more maskable interrupts occur simultaneously. zero indicates the hi ghest priority and 23 indicates the lowest priority. 2. basic configuration types (a) to (d) co rrespond to (a) to (d) in figure 18-1. 3. when bit 1 (lvimd) of the low-voltage det ection register (lvim) is cleared to 0. 4. when 8-bit timer/event counter 51 is used in the carri er generator mode, an interrupt is generated upon the timing when the inttm5h1 signal is generated (see figure 8-13 transfer timing ). 5. the interrupt source intp6 is available only in the 48-pin products. chapter 18 interrupt functions user?s manual u17336ej5v0ud 464 table 18-1. interrupt source list (2/2) interrupt source interrupt type default priority note 1 name trigger internal/ external vector table address basic configuration type note 2 maskable 23 intiic0/ intdmu note 3 end of iic0 communication/end of multiply/divide operation internal 0034h (a) software ? brk brk instruction execution ? 003eh (d) reset reset input poc power-on-clear lvi low-voltage detection note 4 reset ? wdt wdt overflow ? 0000h ? notes 1. the default priority determines the sequence of processing vectored in terrupts if two or more maskable interrupts occur simultaneously. zero indicates the hi ghest priority and 23 indicates the lowest priority. 2. basic configuration types (a) to (d) co rrespond to (a) to (d) in figure 18-1. 3. the interrupt source intdmu is available only in the pd78f0514, 78f0515, and 78f0515d. 4. when bit 1 (lvimd) of the low-voltage detection register (lvim) is set to 1. figure 18-1. basic configurati on of interrupt function (1/2) (a) internal maskable interrupt internal bus interrupt request if mk ie pr isp priority controller vector table address generator standby release signal if: interrupt request flag ie: interrupt enable flag isp: in-service priority flag mk: interrupt mask flag pr: priority specification flag chapter 18 interrupt functions user?s manual u17336ej5v0ud 465 figure 18-1. basic configurati on of interrupt function (2/2) (b) external maskable in terrupt (intp0 to intp6 note ) internal bus interrupt request if mk ie pr isp priority controller vector table address generator standby release signal external interrupt edge enable register (egp, egn) edge detector note 38-pin and 44-pin products: intp0 to intp5 48-pin products intp0 to intp6 (c) external maskable interrupt (intkr) if mk ie pr isp internal bus interrupt request priority controller vector table address generator standby release signal key interrupt detector 1 when krmn = 1 (n = 0 to 3) (d) software interrupt internal bus interrupt request priority controller vector table address generator if: interrupt request flag ie: interrupt enable flag isp: in-service priority flag mk: interrupt mask flag pr: priority specification flag krm: key return mode register chapter 18 interrupt functions user?s manual u17336ej5v0ud 466 18.3 registers controlling interrupt functions the following 6 types of registers are used to control the interrupt functions. ? interrupt request flag regist er (if0l, if0h, if1l, if1h) ? interrupt mask flag register (mk0l, mk0h, mk1l, mk1h) ? priority specification flag register (pr0l, pr0h, pr1l, pr1h) ? external interrupt rising edge enable register (egp) ? external interrupt falling edge enable register (egn) ? program status word (psw) table 18-2 shows a list of interrupt request flags, interrupt mask flags, and priority specification flags corresponding to interrupt request sources. chapter 18 interrupt functions user?s manual u17336ej5v0ud 467 table 18-2. flags corresponding to interrupt request sources interrupt request flag interrupt mask flag priority specification flag interrupt source register register register intlvi lviif if0l lvimk mk0l lvipr pr0l intp0 pif0 pmk0 ppr0 intp1 pif1 pmk1 ppr1 intp2 pif2 pmk2 ppr2 intp3 pif3 pmk3 ppr3 intp4 pif4 pmk4 ppr4 intp5 pif5 pmk5 ppr5 intsre6 sreif6 sremk6 srepr6 intsr6 srif6 if0h srmk6 mk0h srpr6 pr0h intst6 stif6 stmk6 stpr6 intcsi10 csiif10 note 1 csimk10 note 2 csipr10 note 3 intst0 stif0 note 1 dualif0 note 1 stmk0 note 2 dualmk0 note 2 stpr0 note 3 dualpr0 note 3 inttmh1 tmifh1 tmmkh1 tmprh1 inttmh0 tmifh0 tmmkh0 tmprh0 inttm50 tmif50 tmmk50 tmpr50 inttm000 tmif000 tmmk000 tmpr000 inttm010 tmif010 tmmk010 tmpr010 intad adif if1l admk mk1l adpr pr1l intsr0 srif0 srmk0 srpr0 intwti wtiif wtimk wtipr inttm51 note 4 tmif51 tmmk51 tmpr51 intkr krif krmk krpr intwt wtif wtmk wtpr intp6 note 5 pif6 note 5 pmk6 note 5 ppr6 note 5 intiic0 note 6 iicif0 note 8 iicmk0 note 9 iicpr0 note 10 intdmu notes 6, 7 dmuif notes 7, 8 if1h dmumk notes 7, 9 mk1h dmupr notes 7, 10 pr1h notes 1. if either interrupt source intcsi10 or intst0 is generated, bit 2 of if0h is set (1). 2. bit 2 of mk0h supports both interrupt sources intcsi10 and intst0. 3. bit 2 of pr0h supports both interrupt sources intcsi10 and intst0. 4. when 8-bit timer/event counter 51 is used in the carri er generator mode, an interrupt is generated upon the timing when the inttm5h1 signal is generated (see figure 8-13 transfer timing ). 5. 48-pin products only. 6. do not use serial interface iic0 and the multiplie r/divider simultaneously, because various flags corresponding to interrupt request sources are shared among serial interface iic0 and the multiplier/divider. when developing software which us es serial interface iic0, by using the cc78k0 c compiler, do not select the ?use multiplicati on and division code? check box on the pm+ gui. 7. pd78f0514, 78f0515, and 78f0515d only. 8. if either interrupt source intiic0 or intd mu is generated, bit 0 of if1h is set (1). 9. bit 0 of mk1h supports both interrupt sources intiic0 and intdmu. 10. bit 0 of pr1h supports both interrupt sources intiic0 and intdmu. chapter 18 interrupt functions user?s manual u17336ej5v0ud 468 (1) interrupt request flag regist ers (if0l, if0h, if1l, if1h) the interrupt request flags are set to 1 when the correspo nding interrupt request is g enerated or an instruction is executed. they are cleared to 0 when an instruction is executed upon acknow ledgment of an interrupt request or upon reset signal generation. when an interrupt is acknowledged, the interrupt req uest flag is automatically cleared and then the interrupt routine is entered. if0l, if0h, if1l, and if1h are set by a 1-bit or 8-bit memory manipulation instruct ion. when if0l and if0h, and if1l and if1h are combined to form 16-bit registers if0 and if1, they are set by a 16-bit memory manipulation instruction. reset signal generation sets these registers to 00h. figure 18-2. format of interrupt request fl ag registers (if0l, if0h, if1l, if1h) address: ffe0h after reset: 00h r/w symbol <7> <6> <5> <4> <3> <2> <1> <0> if0l sreif6 pif5 pif4 pif3 pif2 pif1 pif0 lviif address: ffe1h after reset: 00h r/w symbol <7> <6> <5> <4> <3> <2> <1> <0> if0h tmif010 tmif000 tmif50 tmifh0 tmifh1 dualif0 csiif10 stif0 stif6 srif6 address: ffe2h after reset: 00h r/w symbol 7 <6> <5> <4> <3> <2> <1> <0> if1l 0 pif6 note 1 wtif krif tmif51 wtiif srif0 adif address: ffe3h after reset: 00h r/w symbol 7 6 5 4 3 2 1 <0> if1h 0 0 0 0 0 0 0 iicif0 dmuif note 2 xxifx interrupt request flag 0 no interrupt request signal is generated 1 interrupt request is generated, interrupt request status notes 1. 48-pin products only. 2. pd78f0514, 78f0515, and 78f0515d only. cautions 1. be sure to clear bits 6 and 7 of if1l to 0 in the 38-pin and 44-pin products. be sure to clear bit 7 of if1l to 0 in the 48-pin products. 2. be sure to clear bits 1 to 7 of if1h to 0. 3. when operating a timer, seri al interface, or a/d converter af ter standby release, operate it once after clearing the interrupt request flag. an interrupt request flag may be set by noise. chapter 18 interrupt functions user?s manual u17336ej5v0ud 469 caution 4. when manipulating a flag of the interrupt request fl ag register, use a 1-bit memory manipulation instruction (clr1). when descr ibing in c language, use a bit manipulation instruction such as ?if0l.0 = 0;? or ?_asm(?clr1 if0l, 0?);? because the co mpiled assembler must be a 1-bit memory manipulation instruction (clr1). if a program is described in c language usi ng an 8-bit memory manipulation instruction such as ?if0l &= 0xfe;? and compiled, it becom es the assembler of three instructions. mov a, if0l and a, #0feh mov if0l, a in this case, even if the request flag of another bit of the same interrupt request flag register (if0l) is set to 1 at the timing between ?mov a, if0l? and ?mov if 0l, a?, the flag is cleared to 0 at ?mov if0l, a?. therefore, care must be exercised when us ing an 8-bit memory manipulation instruction in c language. chapter 18 interrupt functions user?s manual u17336ej5v0ud 470 (2) interrupt mask flag regist ers (mk0l, mk0h, mk1l, mk1h) the interrupt mask flags are used to enable/disable the corresponding maskable interrupt servicing. mk0l, mk0h, mk1l, and mk1h are set by a 1-bit or 8- bit memory manipulation instruction. when mk0l and mk0h, and mk1l and mk1h are combined to form 16-bit registers mk0 and mk1, they are set by a 16-bit memory manipulation instruction. reset signal generation sets these registers to ffh. figure 18-3. format of interrupt mask fl ag registers (mk0l, mk0h, mk1l, mk1h) address: ffe4h after reset: ffh r/w symbol <7> <6> <5> <4> <3> <2> <1> <0> mk0l sremk6 pmk5 pmk4 pmk3 pmk2 pmk1 pmk0 lvimk address: ffe5h after reset: ffh r/w symbol <7> <6> <5> <4> <3> <2> <1> <0> mk0h tmmk010 tmmk000 tmmk50 tmmkh0 tmmkh1 dualmk0 csimk0 stmk0 stmk6 srmk6 address: ffe6h after reset: ffh r/w symbol 7 <6> <5> <4> <3> <2> <1> <0> mk1l 1 pmk6 note 1 wtmk krmk tmmk51 wtimk srmk0 admk address: ffe7h after reset: ffh r/w symbol 7 6 5 4 3 2 1 <0> mk1h 1 1 1 1 1 1 1 iicmk0 dmumk note 2 xxmkx interrupt servicing control 0 interrupt servicing enabled 1 interrupt servicing disabled notes 1. 48-pin products only. 2. pd78f0514, 78f0515, and 78f0515d only. cautions 1. be sure to set bits 6 and 7 of mk1l to 1 in the 38-pin and 44-pin products. be sure to set bit 7 of mk1l to 1 in the 48-pin products. 2. be sure to set bits 1 to 7 of mk1h to 1. chapter 18 interrupt functions user?s manual u17336ej5v0ud 471 (3) priority specification flag re gisters (pr0l, pr0h, pr1l, pr1h) the priority specification flag regist ers are used to set the corresponding maskable interrupt priority order. pr0l, pr0h, pr1l, and pr1h are set by a 1-bit or 8-bi t memory manipulation instruction. if pr0l and pr0h, and pr1l and pr1h are combined to form 16-bit registers pr0 and pr1, they are set by a 16-bit memory manipulation instruction. reset signal generation sets these registers to ffh. figure 18-4. format of priority specification flag registers (pr0l, pr0h, pr1l, pr1h) address: ffe8h after reset: ffh r/w symbol <7> <6> <5> <4> <3> <2> <1> <0> pr0l srepr6 ppr5 ppr4 ppr3 ppr2 ppr1 ppr0 lvipr address: ffe9h after reset: ffh r/w symbol <7> <6> <5> <4> <3> <2> <1> <0> pr0h tmpr010 tmpr000 tmpr50 tmprh0 tmprh1 dualpr0 csipr10 stpr0 stpr6 srpr6 address: ffeah after reset: ffh r/w symbol 7 <6> <5> <4> <3> <2> <1> <0> pr1l 1 ppr6 note 1 wtpr krpr tmpr51 wtipr srpr0 adpr address: ffebh after reset: ffh r/w symbol 7 6 5 4 3 2 1 <0> pr1h 1 1 1 1 1 1 1 iicpr0 dmupr note 2 xxprx priority level selection 0 high priority level 1 low priority level notes 1. 48-pin products only. 2. pd78f0514, 78f0515, and 78f0515d only. cautions 1. be sure to set bits 6 and 7 of pr1l to 1 in the 38- pin and 44-pin products. be sure to set bit 7 of pr1l to 1 in the 48-pin products. 2. be sure to set bits 1 to 7 of pr1h to 1. chapter 18 interrupt functions user?s manual u17336ej5v0ud 472 (4) external interrupt rising edge en able register (egp), external interrupt falling edge enable register (egn) these registers specify the valid edge for intp0 to intp6. egp and egn are set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets these registers to 00h. figure 18-5. format of external interrupt rising edge enable register (egp) and external interrupt falling edge enable register (egn) address: ff48h after reset: 00h r/w symbol 7 6 5 4 3 2 1 0 egp 0 egp6 note egp5 egp4 egp3 egp2 egp1 egp0 address: ff49h after reset: 00h r/w symbol 7 6 5 4 3 2 1 0 egn 0 egn6 note egn5 egn4 egn3 egn2 egn1 egn0 egpn egnn intpn pin valid edge selection (n = 0 to 6) 0 0 edge detection disabled 0 1 falling edge 1 0 rising edge 1 1 both rising and falling edges note 48-pin products only. caution be sure to clear bits 6 and 7 of eg p and egn to 0 in the 38-pin and 44-pin products. be sure to clear bit 7 of egp and egn to 0 in the 48-pin products. table 18-3 shows the ports corresponding to egpn and egnn. table 18-3. ports correspo nding to egpn and egnn detection enable register edge detection port interrupt request signal egp0 egn0 p120 intp0 egp1 egn1 p30 intp1 egp2 egn2 p31 intp2 egp3 egn3 p32 intp3 egp4 egn4 p33 intp4 egp5 egn5 p16 intp5 egp6 note egn6 note p140 note intp6 note note 48-pin products only. caution select the port mode by clearing eg pn and egnn to 0 because an edge may be detected when the external interrupt func tion is switched to the port function. remark 38-pin and 44-pin products: n = 0 to 5 48-pin products: n = 0 to 6 chapter 18 interrupt functions user?s manual u17336ej5v0ud 473 (5) program status word (psw) the program status word is a register used to hold the instruction exec ution result and the current status for an interrupt request. the ie flag that sets maskable interr upt enable/disable and the isp fl ag that controls multiple interrupt servicing are mapped to the psw. besides 8-bit read/write, this register can carry out op erations using bit manipulation instructions and dedicated instructions (ei and di). when a vect ored interrupt request is acknowledged, if the brk instruction is executed, the contents of the psw are aut omatically saved into a stack and the ie flag is reset to 0. if a maskable interrupt request is acknowledged, the contents of the priority specification flag of t he acknowledged interrupt are transferred to the isp flag. the psw contents are also saved into the stack with t he push psw instruction. they are restored from the stack with the reti, retb, and pop psw instructions. reset signal generation sets psw to 02h. figure 18-6. format of program status word <7> ie <6> z <5> rbs1 <4> ac <3> rbs0 2 0 <1> isp 0 cy psw after reset 02h isp high-priority interrupt servicing (low-priority interrupt disabled) ie 0 1 disabled priority of interrupt currently being serviced interrupt request acknowledgment enable/disable used when normal instruction is executed enabled interrupt request not acknowledged, or low- priority interrupt servicing (all maskable interrupts enabled) 0 1 chapter 18 interrupt functions user?s manual u17336ej5v0ud 474 18.4 interrupt servicing operations 18.4.1 maskable interrupt acknowledgment a maskable interrupt becomes acknowledgeable when the in terrupt request flag is set to 1 and the mask (mk) flag corresponding to that interrupt request is cleared to 0. a vectored interrupt request is acknowledged if interrupts are in the interrupt enabled state (when the ie flag is set to 1). however, a low-priority interrupt request is not acknowledged during servicing of a higher priority in terrupt request (when the isp flag is reset to 0). the times from generation of a maskable interrupt request until vectored interr upt servicing is performed are listed in table 18-4 below. for the interrupt request acknowledgment timing, see figures 18-8 and 18-9 . table 18-4. time from generation of maskable inte rrupt until servicing minimum time maximum time note when pr = 0 7 clocks 32 clocks when pr = 1 8 clocks 33 clocks note if an interrupt request is generated just before a di vide instruction, the wait time becomes longer. remark 1 clock: 1/f cpu (f cpu : cpu clock) if two or more maskable interrupt requests are generated simultaneously, the request with a higher priority level specified in the priority specification flag is acknowledge d first. if two or more interrupts requests have the same priority level, the request with the highest default priority is acknowledged first. an interrupt request that is held pending is a cknowledged when it becomes acknowledgeable. figure 18-7 shows the interrupt request acknowledgment algorithm. if a maskable interrupt request is acknowledged, the content s are saved into the stacks in the order of psw, then pc, the ie flag is reset (0), and the contents of the pr iority specification flag corresponding to the acknowledged interrupt are transferred to the isp flag. the vector table data deter mined for each interrupt request is the loaded into the pc and branched. restoring from an interrupt is possible by using the reti instruction. chapter 18 interrupt functions user?s manual u17336ej5v0ud 475 figure 18-7. interrupt request acknowledgment processing algorithm start if = 1? mk = 0? pr = 0? ie = 1? isp = 1? interrupt request held pending yes yes no no yes (interrupt request generation) yes no (low priority) no no yes yes no ie = 1? no any high-priority interrupt request among those simultaneously generated with pr = 0? yes (high priority) no yes yes no vectored interrupt servicing interrupt request held pending interrupt request held pending interrupt request held pending interrupt request held pending interrupt request held pending interrupt request held pending vectored interrupt servicing any high-priority interrupt request among those simultaneously generated? any high-priority interrupt request among those simultaneously generated with pr = 0? if: interrupt request flag mk: interrupt mask flag pr: priority specification flag ie: flag that controls acknowledgment of mask able interrupt request (1 = enable, 0 = disable) isp: flag that indicates the priority level of the interrupt currently being serviced (0 = high-priority interrupt servicing, 1 = no interrupt request acknowledg ed, or low-priority interrupt servicing) chapter 18 interrupt functions user?s manual u17336ej5v0ud 476 figure 18-8. interrupt request ac knowledgment timing (minimum time) 8 clocks 7 clocks instruction instruction psw and pc saved, jump to interrupt servicing interrupt servicing program cpu processing if ( pr = 1) if ( pr = 0) 6 clocks remark 1 clock: 1/f cpu (f cpu : cpu clock) figure 18-9. interrupt request ac knowledgment timing (maximum time) 33 clocks 32 clocks instruction divide instruction psw and pc saved, jump to interrupt servicing interrupt servicing program cpu processing if ( pr = 1) if ( pr = 0) 6 clocks 25 clocks remark 1 clock: 1/f cpu (f cpu : cpu clock) 18.4.2 software interrupt request acknowledgment a software interrupt request is acknowledged by brk instructi on execution. software interrupts cannot be disabled. if a software interrupt request is ackno wledged, the cont ents are saved into the stacks in the order of the program status word (psw), then program counter (pc), the ie flag is reset (0), and t he contents of the ve ctor table (003eh, 003fh) are loaded into the pc and branched. restoring from a software interrupt is possi ble by using the retb instruction. caution do not use the reti instruction fo r restoring from the software interrupt. chapter 18 interrupt functions user?s manual u17336ej5v0ud 477 18.4.3 multiple interrupt servicing multiple interrupt servicing occurs when another interrupt re quest is acknowledged during execution of an interrupt. multiple interrupt servicing does not occur unless the inte rrupt request acknowledgment enabled state is selected (ie = 1). when an interrupt request is acknowledged, inte rrupt request acknowledgment becomes disabled (ie = 0). therefore, to enable multiple interrupt servicing, it is necessary to set (1) the ie flag with the ei instruction during interrupt servicing to enable interrupt acknowledgment. moreover, even if interrupts are enabled, multiple interr upt servicing may not be enabled, this being subject to interrupt priority control. two types of priority control are available: default priority control and programmable priority control. programmable priority control is used for multiple interrupt servicing. in the interrupt enabled state, if an in terrupt request with a priority equal to or higher than that of the interrupt currently being serviced is generated, it is acknowledged for mu ltiple interrupt servicing. if an interrupt with a priority lower than that of the interrupt currently being serviced is generated during interrupt servicing, it is not acknowledged for multiple interrupt servicing. inte rrupt requests that are not enabled because interrupts are in the interrupt disabled state or because they have a lower prio rity are held pending. when servicing of the current interrupt ends, the pending interrupt request is acknowledged following execution of at least one main processing instruction execution. table 18-5 shows relationship between interrupt requests enabled for multiple interrupt servicing and figure 18-10 shows multiple interrupt servicing examples. table 18-5. relationship between interrupt requests enabled for multiple interrupt servicing during interrupt servicing maskable interrupt request pr = 0 pr = 1 multiple interrupt request interrupt being serviced ie = 1 ie = 0 ie = 1 ie = 0 software interrupt request isp = 0 { { maskable interrupt isp = 1 { { { software interrupt { { { remarks 1. : multiple interrupt servicing enabled 2. : multiple interrupt servicing disabled 3. isp and ie are flags contained in the psw. isp = 0: an interrupt with higher priority is being serviced. isp = 1: no interrupt request has been acknowledged, or an interrupt with a lower priority is being serviced. ie = 0: interrupt request acknowledgment is disabled. ie = 1: interrupt request acknowledgment is enabled. 4. pr is a flag contained in pr0l, pr0h, pr1l, and pr1h. pr = 0: higher priority level pr = 1: lower priority level chapter 18 interrupt functions user?s manual u17336ej5v0ud 478 figure 18-10. examples of multip le interrupt se rvicing (1/2) example 1. multiple inte rrupt servicing occurs twice main processing intxx servicing intyy servicing intzz servicing ei ei ei reti reti reti intxx (pr = 1) intyy (pr = 0) intzz (pr = 0) ie = 0 ie = 0 ie = 0 ie = 1 ie = 1 ie = 1 during servicing of interrupt intxx, two interrupt re quests, intyy and intzz, are acknowledged, and multiple interrupt servicing takes place. before each interrupt re quest is acknowledged, the ei instruction must always be issued to enable interrupt request acknowledgment. example 2. multiple interrupt servicing does not occur due to priority control main processing intxx servicing intyy servicing intxx (pr = 0) intyy (pr = 1) ei reti ie = 0 ie = 0 ei 1 instruction execution reti ie = 1 ie = 1 interrupt request intyy issued during servicing of interrupt intxx is not acknowledged because its priority is lower than that of intxx, and mu ltiple interrupt servicing does not take place. the intyy interrupt request is held pending, and is acknowledged following execution of one main processing instruction. pr = 0: higher priority level pr = 1: lower priority level ie = 0: interrupt request acknowledgment disabled chapter 18 interrupt functions user?s manual u17336ej5v0ud 479 figure 18-10. examples of multip le interrupt se rvicing (2/2) example 3. multiple interrupt servicing do es not occur because inte rrupts are not enabled main processing intxx servicing intyy servicing ei 1 instruction execution reti reti intxx (pr = 0) intyy (pr = 0) ie = 0 ie = 0 ie = 1 ie = 1 interrupts are not enabled during servicing of interrupt int xx (ei instruction is not issued), therefore, interrupt request intyy is not acknowledged and multiple interrupt serv icing does not take place. the intyy interrupt request is held pending, and is acknowledged following ex ecution of one main processing instruction. pr = 0: higher priority level ie = 0: interrupt request acknowledgment disabled chapter 18 interrupt functions user?s manual u17336ej5v0ud 480 18.4.4 interrupt request hold there are instructions where, even if an interrupt request is issued for them while another instruction is being executed, request acknowledgment is held pending until the end of execution of the ne xt instruction. these instructions (interrupt request hol d instructions) are listed below. ? mov psw, #byte ? mov a, psw ? mov psw, a ? mov1 psw. bit, cy ? mov1 cy, psw. bit ? and1 cy, psw. bit ? or1 cy, psw. bit ? xor1 cy, psw. bit ? set1 psw. bit ? clr1 psw. bit ? retb ? reti ? push psw ? pop psw ? bt psw. bit, $addr16 ? bf psw. bit, $addr16 ? btclr psw. bit, $addr16 ? ei ? di ? manipulation instructions for the if0l, if0h, if1l, if1h, mk0l, mk0h, mk1l, mk1h, pr0l, pr0h, pr1l, and pr1h registers. caution the brk instruction is not one of the above-listed interrupt re quest hold instructions. however, the software interrupt activated by executing the brk instruction causes the ie flag to be cleared. therefore, even if a maskable interrupt re quest is generated during execution of the brk instruction, the interrupt re quest is not acknowledged. figure 18-11 shows the timing at which interrupt requests are held pending. figure 18-11. interrupt request hold instruction n instruction m psw and pc saved, jump to interrupt servicing interrupt servicing program cpu processing if remarks 1. instruction n: interrupt request hold instruction 2. instruction m: instruction other t han interrupt request hold instruction 3. the pr (priority level) values do not affect the operation of if (interrupt request). user?s manual u17336ej5v0ud 481 chapter 19 key interrupt function 19.1 functions of key interrupt a key interrupt (intkr) can be generated by setting t he key return mode register (krm) and inputting a falling edge to the key interrupt input pins (kr0 to kr3 note ). note 38-pin products: kr0, kr1 44-pin and 48-pin products: kr0 to kr3 table 19-1. assignment of k ey interrupt detection pins flag description krm0 controls kr0 signal in 1-bit units. krm1 controls kr1 signal in 1-bit units. krm2 controls kr2 signal in 1-bit units. krm3 controls kr3 signal in 1-bit units. 19.2 configuration of key interrupt the key interrupt includes the following hardware. table 19-2. configuration of key interrupt item configuration control register key return mode register (krm) figure 19-1. block diag ram of key interrupt intkr key return mode register (krm) 0 0 00 krm3 krm2 krm1 krm0 kr3 note kr2 note kr1 kr0 note 44-pin and 48-pin products only chapter 19 key interrupt function user?s manual u17336ej5v0ud 482 19.3 register controlling key interrupt (1) key return mode register (krm) this register controls the krm0 to krm3 bits using the kr0 to kr3 signals, respectively. krm is set by a 1-bit or 8-bit memory manipulation instruction. reset signal generation sets krm to 00h. figure 19-2. format of key return mode register (krm) 0 does not detect key interrupt signal detects key interrupt signal krmn 0 1 key interrupt mode control krm 0 0 0 krm3 krm2 krm1 krm0 address: ff6eh after reset: 00h r/w symbol 765432 0 cautions 1. for the 38-pin products , be sure to set bits 2 and 3 of krm, pm7, and p7 to ?0?. 2. if any of the krm0 to krm3 bits used is set to 1, set bits 0 to 3 (pu70 to pu73) of the corresponding pull-up resistor register 7 (pu7) to 1. 3. if krm is changed, the interrupt request flag may be set. therefore, disable interrupts and then change the krm register. clear the in terrupt request flag and enable interrupts. 4. the bits not used in the key inte rrupt mode can be used as normal ports. user?s manual u17336ej5v0ud 483 chapter 20 standby function 20.1 standby function and configuration 20.1.1 standby function the standby function is designed to reduce the operating current of the system. the following two modes are available. (1) halt mode halt instruction execution se ts the halt mode. in the halt mode, the cpu operation clock is stopped. if the high-speed system clock oscillator, in ternal high-speed oscillator, internal low-speed oscillator, or subsystem clock oscillator is operating before the halt mode is set, oscillation of each clock continues. in this mode, the operating current is not decreased as much as in the st op mode, but the halt mode is effective for restarting operation immediately upon interrupt request generation and carrying out intermittent operations frequently. (2) stop mode stop instruction execution sets the stop mode. in the stop mode, the high-speed system clock oscillator and internal high-speed oscillator stop, stopping the whole system, thereby considerably reducing the cpu operating current. because this mode can be cleared by an interrupt reques t, it enables intermittent operations to be carried out. however, because a wait time is required to secure th e oscillation stabilization time after the stop mode is released when the x1 clock is selected, select the halt mode if it is necessary to start processing immediately upon interrupt request generation. in either of these two modes, all the contents of registers, flags and data me mory just before the standby mode is set are held. the i/o port output latches an d output buffer statuses are also held. cautions 1. the stop mode can be used only when the cpu is operating on the main system clock. the subsystem clock oscillation cannot be stopped. the halt mode can be used when the cpu is operating on either the main syst em clock or the subsystem clock. 2. when shifting to the stop mode, be su re to stop the peripher al hardware operation operating with main system clock be fore executing stop instruction. 3. the following sequence is r ecommended for operating current reduction of the a/d converter when the standby function is used: first cl ear bit 7 (adcs) and bit 0 (adce) of the a/d converter mode register (adm) to 0 to stop the a/d conversion opera tion, and then execute the stop instruction. 20.1.2 registers controlling standby function the standby function is controlled by the following two registers. ? oscillation stabilization time c ounter status register (ostc) ? oscillation stabilization time select register (osts) remark for the registers that start, st op, or select the clock, see chapter 5 clock generator . chapter 20 standby function user?s manual u17336ej5v0ud 484 (1) oscillation stabilization time c ounter status register (ostc) this is the register that indicates t he count status of the x1 clock oscillati on stabilization time counter. when x1 clock oscillation starts with the intern al high-speed oscillation clock or su bsystem clock used as the cpu clock, the x1 clock oscillation stabilization time can be checked. ostc can be read by a 1-bit or 8-bit memory manipulation instruction. when reset is released (reset by reset input, poc, lvi, and wdt), the stop instruction and mstop (bit 7 of moc register) = 1 clear ostc to 00h. figure 20-1. format of oscillation stabilizati on time counter status register (ostc) address: ffa3h after reset: 00h r symbol 7 6 5 4 3 2 1 0 ostc 0 0 0 most11 most 13 most14 most15 most16 most11 most13 most14 most15 most16 oscillation stabilization time status f x = 10 mhz f x = 20 mhz 1 0 0 0 0 2 11 /f x min. 204.8 s min. 102.4 s min. 1 1 0 0 0 2 13 /f x min. 819.2 s min. 409.6 s min. 1 1 1 0 0 2 14 /f x min. 1.64 ms min. 819.2 s min. 1 1 1 1 0 2 15 /f x min. 3.27 ms min. 1.64 ms min. 1 1 1 1 1 2 16 /f x min. 6.55 ms min. 3.27 ms min. cautions 1. after the above time has elapsed, the bits are set to 1 in order from most11 and remain 1. 2. the oscillation stabilization time counter counts up to the oscillation stabilization time set by osts. if the st op mode is entered and then released while the internal high-speed oscillation clock is being used as the cpu clock, set the oscillation stabilization time as follows. ? desired ostc oscillation stabilization time oscillation stabilization time set by osts note, therefore, that only the status up to the oscillation stabilization time set by osts is set to ostc afte r stop mode is released. 3. the x1 clock oscillation stabilization wa it time does not include the time until clock oscillation starts (?a? below). stop mode release x1 pin voltage waveform a remark f x : x1 clock oscillation frequency chapter 20 standby function user?s manual u17336ej5v0ud 485 (2) oscillation stabilization time select register (osts) this register is used to select the x1 clock oscillation stabilization wait time when the stop mode is released. when the x1 clock is selected as the cpu clock, the operation waits for the time set using osts after the stop mode is released. when the internal high-speed oscillation clock is selected as the cpu clock, confirm with ostc that the desired oscillation stabilization time has elaps ed after the stop mode is released. the oscillation stabilization time can be checked up to the time set using ostc. osts can be set by an 8-bit memory manipulation instruction. reset signal generation sets osts to 05h. figure 20-2. format of oscillation stabiliz ation time select register (osts) address: ffa4h after reset: 05h r/w symbol 7 6 5 4 3 2 1 0 osts 0 0 0 0 0 osts2 osts1 osts0 osts2 osts1 osts0 oscillation stabilization time selection f x = 10 mhz f x = 20 mhz 0 0 1 2 11 /f x 204.8 s 102.4 s 0 1 0 2 13 /f x 819.2 s 409.6 s 0 1 1 2 14 /f x 1.64 ms 819.2 s 1 0 0 2 15 /f x 3.27 ms 1.64 ms 1 0 1 2 16 /f x 6.55 ms 3.27 ms other than above setting prohibited cautions 1. to set the stop mode when the x1 clock is used as the cpu clock, set osts before executing the stop instruction. 2. do not change the value of the osts register during the x1 clock oscillation stabilization time. 3. the oscillation stabilization time counter counts up to the oscillation stabilization time set by osts. if the st op mode is entered and then released while the internal high-speed oscillation clock is being used as the cpu clock, set the oscillation stabilization time as follows. ? desired ostc oscillation stabilization time oscillation stabilization time set by osts note, therefore, that only the status up to the oscillation stabilization time set by osts is set to ostc afte r stop mode is released. 4. the x1 clock oscillation stabilization wa it time does not include the time until clock oscillation starts (?a? below). stop mode release x1 pin voltage waveform a remark f x : x1 clock oscillation frequency chapter 20 standby function user?s manual u17336ej5v0ud 486 20.2 standby function operation 20.2.1 halt mode (1) halt mode the halt mode is set by executing t he halt instruction. halt mode can be set regardless of whether the cpu clock before the setting was the high-spe ed system clock, internal high-spee d oscillation clock, or subsystem clock. the operating statuses in t he halt mode are shown below. chapter 20 standby function user?s manual u17336ej5v0ud 487 table 20-1. operating statuses in halt mode (1/2) when halt instruction is executed while cpu is operating on main system clock halt mode setting item when cpu is operating on internal high-speed oscillation clock (f rh ) when cpu is operating on x1 clock (f x ) when cpu is operating on external main system clock (f exclk ) system clock clock supply to the cpu is stopped f rh operation continues (cannot be stopped) status before halt mode was set is continued f x status before halt mode was set is continued operation continues (cannot be stopped) status before halt mode was set is retained main system clock f exclk operates or stops by external cl ock input operation continues (cannot be stopped) f xt status before halt mode was set is continued subsystem clock f exclks operates or stops by external clock input f rl status before halt mode was set is continued cpu flash memory operation stopped ram port (latch) status before halt mode was set is retained 16-bit timer/event counter 00 50 8-bit timer/event counter 51 h0 8-bit timer h1 watch timer operable watchdog timer operable. clock supply to watchdog ti mer stops when ?internal low-speed oscillator can be stopped by software? is set by option byte. clock output note 1 a/d converter uart0 uart6 csi10 serial interface iic0 multiplier/divider note 2 power-on-clear function low-voltage detection function external interrupt operable notes 1. 48-pin products only. 2. pd78f0514, 78f0515, and 78f0515d only. remark f rh : internal high-speed oscillation clock f x : x1 clock f exclk : external main system clock f xt : xt1 clock f exclks : external subsystem clock f rl : internal low-speed oscillation clock chapter 20 standby function user?s manual u17336ej5v0ud 488 table 20-1. operating statuses in halt mode (2/2) when halt instruction is executed while cpu is operating on subsystem clock halt mode setting item when cpu is operating on xt1 clock (f xt ) when cpu is operating on external subsystem clock (f exclks ) system clock clock supply to the cpu is stopped f rh f x status before halt mode was set is continued main system clock f exclk operates or stops by external clock input f xt operation continues (cannot be stopped) stat us before halt mode was set is continued subsystem clock f exclks operates or stops by external clock input operation continues (cannot be stopped) f rl status before halt mode was set is continued cpu flash memory operation stopped ram port (latch) status before halt mode was set is retained 16-bit timer/event counter 00 note 1 50 note 1 8-bit timer/event counter 51 note 1 h0 8-bit timer h1 watch timer operable watchdog timer operable. clock supply to watchdog ti mer stops when ?internal low-speed oscillator can be stopped by software? is set by option byte. clock output note 2 operable a/d converter operable. however, operat ion disabled when peripheral hardware clock (f prs ) is stopped. uart0 uart6 csi10 note 1 serial interface iic0 note 1 multiplier/divider note 3 power-on-clear function low-voltage detection function external interrupt operable notes 1. when the cpu is operating on the subsystem clock and the internal high-speed oscillation clock has been stopped, do not start operation of thes e functions on the external clock input from peripheral hardware pins. 2. 48-pin products only. 3. pd78f0514, 78f0515, and 78f0515d only. remark f rh : internal high-speed oscillation clock f x : x1 clock f exclk : external main system clock f xt : xt1 clock f exclks : external subsystem clock f rl : internal low-speed oscillation clock chapter 20 standby function user?s manual u17336ej5v0ud 489 (2) halt mode release the halt mode can be released by the following two sources. (a) release by unmasked interrupt request when an unmasked interrupt request is generated, the halt mode is released. if interrupt acknowledgment is enabled, vectored interrupt servicing is carried out. if interrupt acknowledgment is disabled, the next address instruction is executed. figure 20-3. halt mode release by interrupt request generation halt instruction wait note normal operation halt mode normal operation oscillation high-speed system clock, internal high-speed oscillation clock, or subsystem clock status of cpu standby release signal interrupt request note the wait time is as follows: ? when vectored interrupt servicing is carried out: 8 or 9 clocks ? when vectored interrupt servicing is not carried out: 2 or 3 clocks remark the broken line indicates the case when the interrupt request which has released the standby mode is acknowledged. chapter 20 standby function user?s manual u17336ej5v0ud 490 (b) release by reset signal generation when the reset signal is generated, halt mode is re leased, and then, as in the case with a normal reset operation, the program is executed after br anching to the reset vector address. figure 20-4. halt mode release by reset (1) when high-speed system clock is used as cpu clock halt instruction reset signal high-speed system clock (x1 oscillation) halt mode reset period oscillates oscillation stopped oscillates status of cpu normal operation (high-speed system clock) oscillation stabilization time (2 11 /f x to 2 16 /f x ) normal operation (internal high-speed oscillation clock) oscillation stopped starting x1 oscillation is specified by software. reset processing (11 to 45 s) (2) when internal high-speed osc illation clock is used as cpu clock halt instruction reset signal internal high-speed oscillation clock normal operation (internal high-speed oscillation clock) halt mode reset period normal operation (internal high-speed oscillation clock) oscillates oscillation stopped oscillates status of cpu wait for oscillation accuracy stabilization (86 to 361 s) reset processing (11 to 45 s) (3) when subsystem clo ck is used as cpu clock halt instruction reset signal subsystem clock (xt1 oscillation) normal operation (subsystem clock) halt mode reset period normal operation mode (internal high-speed oscillation clock) oscillates oscillation stopped oscillates status of cpu oscillation stopped starting xt1 oscillation is specified by software. reset processing (11 to 45 s) remark f x : x1 clock oscillation frequency chapter 20 standby function user?s manual u17336ej5v0ud 491 table 20-2. operation in response to interrupt request in halt mode release source mk pr ie isp operation 0 0 0 next address instruction execution 0 0 1 interrupt servicing execution 0 1 0 1 0 1 0 next address instruction execution 0 1 1 1 interrupt servicing execution maskable interrupt request 1 halt mode held reset ? ? reset processing : don?t care 20.2.2 stop mode (1) stop mode setting and operating statuses the stop mode is set by executing t he stop instruction, and it can be se t only when the cpu clock before the setting was the main system clock. caution because the interrupt request signal is used to clear the standby mode, if there is an interrupt source with the interrupt request flag set and the interrupt mask flag reset, the standby mode is immediately cleared if set. thus, the stop mode is reset to the halt mode immediately after execution of the stop instruction and the system returns to the operating mode as soon as the wait time set using the oscillation stabilizat ion time select register (osts) has elapsed. the operating statuses in t he stop mode are shown below. chapter 20 standby function user?s manual u17336ej5v0ud 492 table 20-3. operating statuses in stop mode when stop instruction is executed while cpu is operating on main system clock stop mode setting item when cpu is operating on internal high-speed oscillation clock (f rh ) when cpu is operating on x1 clock (f x ) when cpu is operating on external main system clock (f exclk ) system clock clock supply to the cpu is stopped f rh f x stopped main system clock f exclk input invalid f xt status before stop mode was set is continued subsystem clock f exclks operates or stops by external clock input f rl status before stop mode was set is continued cpu flash memory operation stopped ram port (latch) status before stop mode was set is retained 16-bit timer/event counter 00 note 1 operation stopped 50 note 1 operable only when ti50 is se lected as the count clock 8-bit timer/event counter 51 note 1 operable only when ti51 is se lected as the count clock h0 operable only when tm50 output is selected as the count clock during 8- bit timer/event counter 50 operation 8-bit timer h1 operable only when f rl , f rl /2 7 , f rl /2 9 is selected as the count clock watch timer operable only when subsystem clock is selected as the count clock watchdog timer operable. clock supply to watchdog ti mer stops when ?internal low-speed oscillator can be stopped by software? is set by option byte. clock output note 2 operable only when subs ystem clock is selected as the count clock a/d converter operation stopped uart0 uart6 operable only when tm50 output is selected as the serial clock during 8-bi t timer/event counter 50 operation csi10 note 1 operable only when the exte rnal clock is selected as the serial clock serial interface iic0 note 1 operable only when the external clock from the exscl0/p62 pin is selected as the serial clock multiplier/divider note 3 operation stopped power-on-clear function low-voltage detection function external interrupt operable notes 1. do not start operation of these func tions on the external clock input from peripheral hardware pins in the stop mode. 2. 48-pin products only. 3. pd78f0514, 78f0515, and 78f0515d only. remark f rh : internal high-speed oscillation clock f x : x1 clock f exclk : external main system clock f xt : xt1 clock f exclks : external subsystem clock f rl : internal low-speed oscillation clock chapter 20 standby function user?s manual u17336ej5v0ud 493 cautions 1. to use the peripheral ha rdware that stops operation in the stop mode, and the peripheral hardware for which the clock that stops oscillati ng in the stop mode after the stop mode is released, restart the peripheral hardware. 2. even if ?internal low-speed oscillator can be stopped by software? is selected by the option byte, the internal low-speed osc illation clock continues in the stop mode in the status before the stop mode is set. to stop the internal low- speed oscillator?s oscillation in the stop mode, stop it by software and then execute the stop instruction. 3. to shorten oscillation stabiliz ation time after the stop mode is released when the cpu operates with the high-speed system clock (x1 oscillation) , temporarily switch the cpu clock to the internal high-speed oscillation cl ock before the next execution of the stop instruction. before changing the cpu clock from the internal high-speed oscillation clock to the hi gh-speed system clock (x1 oscillation) after the stop mode is released, check the oscilla tion stabilization time with the oscillation stabilization time counter status register (ostc). 4. if the stop instruction is executed when amph = 1, supply of the cpu clock is stopped for 4.06 to 16.12 s after the stop mode is re leased when the internal hi gh-speed oscillation clock is selected as the cpu clock, or for the duration of 160 externa l clocks when th e high-speed system clock (external clock input) is selected as the cpu clock. (2) stop mode release figure 20-5. operation timing when stop mode is released (when unmasked interrupt request is generated) stop mode stop mode release high-speed system clock (x1 oscillation) high-speed system clock (external clock input) internal high-speed oscillation clock high-speed system clock (x1 oscillation) is selected as cpu clock when stop instruction is executed high-speed system clock (external clock input) is selected as cpu clock when stop instruction is executed internal high-speed oscillation clock is selected as cpu clock when stop instruction is executed wait for oscillation accuracy stabilization (86 to 361 s) halt status (oscillation stabilization time set by osts) clock switched automatically clock switched by software high-speed system clock high-speed system clock wait note 2 wait note 2 clock supply stopped (4.06 to 16.12 s) note 1 high-speed system clock clock supply stopped (160 clocks) note 1 internal high-speed oscillation clock notes 1. when amph = 1 2. the wait time is as follows: ? when vectored interrupt servicing is carried out: 8 or 9 clocks ? when vectored interrupt servicing is not carried out: 2 or 3 clocks chapter 20 standby function user?s manual u17336ej5v0ud 494 the stop mode can be released by the following two sources. (a) release by unmasked interrupt request when an unmasked interrupt request is generated, the st op mode is released. if interrupt acknowledgment is enabled, vectored interrupt servicing is carried ou t. if interrupt acknowledgment is disabled, the next address instruction is executed. figure 20-6. stop mode release by interrupt request generation (1/2) (1) when high-speed system clock (x 1 oscillation) is used as cpu clock normal operation (high-speed system clock) normal operation (high-speed system clock) oscillates oscillates stop instruction stop mode wait (set by osts) standby release signal oscillation stabilization wait (halt mode status) oscillation stopped high-speed system clock (x1 oscillation) status of cpu oscillation stabilization time (set by osts) interrupt request (2) when high-speed system clock (external clock input) is used as cpu clock (1/2) ? when amph = 1 interrupt request stop instruction standby release signal status of cpu high-speed system clock (external clock input) oscillates normal operation (high-speed system clock) stop mode oscillation stopped oscillates normal operation (high-speed system clock) wait note clock supply stopped (160 clocks) note the wait time is as follows: ? when vectored interrupt servicing is carried out: 8 or 9 clocks ? when vectored interrupt servicing is not carried out: 2 or 3 clocks remark the broken lines indicate the case when the inte rrupt request that has re leased the standby mode is acknowledged. chapter 20 standby function user?s manual u17336ej5v0ud 495 figure 20-6. stop mode release by interrupt request generation (2/2) (2) when high-speed system clock (external clock input) is used as cpu clock (2/2) ? when amph = 0 interrupt request stop instruction standby release signal status of cpu high-speed system clock (external clock input) normal operation (high-speed system clock) oscillates stop mode oscillation stopped wait note normal operation (high-speed system clock) oscillates (3) when internal high-speed osc illation clock is used as cpu clock ? when amph = 1 (4.06 to 16.12 s) standby release signal status of cpu internal high-speed oscillation clock normal operation (internal high-speed oscillation clock) oscillates stop mode oscillation stopped wait for oscillation accuracy stabilization (86 to 361 s) interrupt request stop instruction wait note normal operation (internal high-speed oscillation clock) clock supply stopped oscillates ? when amph = 0 wait note wait for oscillation accuracy stabilization (86 to 361 s) oscillates normal operation (internal high-speed oscillation clock) stop mode oscillation stopped oscillates normal operation (internal high-speed oscillation clock) internal high-speed oscillation clock status of cpu standby release signal stop instruction interrupt request note the wait time is as follows: ? when vectored interrupt servicing is carried out: 8 or 9 clocks ? when vectored interrupt servicing is not carried out: 2 or 3 clocks remark the broken lines indicate the case when the inte rrupt request that has re leased the standby mode is acknowledged. |