rev. 1.2 december 2001 1/10 this is preliminary information on a new product in development or undergoing evaluation. details are subject to change without notice. st7scr 8-bit low-power, full-speed usb mcu with 16k flash, 768 ram, smartcard i/f, timer data briefing n memories C up to 16k of rom or high density flash (hd- flash) program memory with read/write pro- tection C hdflash in-circuit and in-application pro- gramming C up to 768 bytes of ram including up to 128 bytes stack and 256 bytes usb buffer n clock, reset and supply management C low voltage reset C 2 power saving modes: halt and wait modes C pll for generating 48 mhz usb clock using a 4 mhz crystal n interrupt management C nested interrupt controller n usb (universal serial bus) interface C 256-byte buffer for full speed bulk, control and interrupt transfer types compliant with usb specification (version 2.0) C on-chip 3.3v usb voltage regulator and transceivers with software power-down C 7 usb endpoints: one 8-byte bidirectional control endpoint one 64-byte in endpoint, one 64-byte out endpoint four 8-byte in endpoints n 35 or 4 i/o ports : C up to 4 led outputs with software program- mable constant current (3 or 7 ma). C 2 general purpose i/os programmable as in- terrupts C up to 8 line inputs programmable as interrupts C up to 20 outputs C 1 line assigned by default as static input after reset n iso7816-3 uart interface: C 4 mhz clock generation C synchronous/asynchronous protocols (t=0, t=1) C automatic retry on parity error C programmable baud rate from 372 clock puls- es up to 11.625 clock pulses (d=32/f=372) C card insertion/removal detection n smartcard power supply: C selectable card v cc 1.8v, 3v, and 5v C internal step-up converter for 5v supplied smartcards (with a current of up to 55ma) us- ing only two external components. C programmable smartcard internal voltage regulator (1.8v to 3.0v) with current overload protection and 4 kv esd protection (human body model) for all smartcard interface i/os n one 8-bit timer C time base unit (tbu) for generating periodic interrupts. n development tools C full hardware/software development package table 1. device summary tqfp64 14x14 so24 features st7fscrdie st7scrdie st7fscr1r4 st7scr1r4 ST7FSCR1E4 st7scr1e4 program memory 16k flash 16k rom 16k flash 16k rom 16k flash 16k rom user ram (stack) - bytes 768 (256) peripherals usb full-speed (7 ep), tbu, watchdog timer, iso7816-3 interface operating supply 4.0 to 5.5v package die tqfp64 so24 cpu frequency 4 or 8 mhz operating temperature 0c to +70c 1
st7scr 2/10 1 introduction the st7scr and st7fscr devices are mem- bers of the st7 microcontroller family designed for usb applications. all devices are based on a com- mon industry-standard 8-bit core, featuring an en- hanced instruction set. the st7scr rom devices are factory-pro- grammed and are not reprogrammable. the st7fscr versions feature dual-voltage flash memory with flash programming capability. they operate at a 4mhz external oscillator fre- quency. under software control, all devices can be placed in wait or halt mode, reducing power consump- tion when the application is in idle or stand-by state. the enhanced instruction set and addressing modes of the st7 offer both power and flexibility to software developers, enabling the design of highly efficient and compact application code. in addition to standard 8-bit data management, all st7 micro- controllers feature true bit manipulation, 8x8 un- signed multiplication and indirect addressing modes. the devices include an st7 core, up to 16 kbytes of program memory, up to 512 bytes of user ram, up to 35 i/o lines and the following on-chip periph- erals: C usb full speed interface with 7 endpoints, pro- grammable in/out configuration and embedded 3.3v voltage regulator and transceivers (no ex- ternal components are needed). C iso7816-3 uart interface with programmable baud rate from 372 clock pulses up to 11.625 clock pulses C smartcard supply block able to provide pro- grammable supply voltage and i/o voltage levels to the smartcards C low voltage reset ensuring proper power-on or power-off of the device (selectable by option) C watchdog timer C 8-bit timer (tbu) 1
st7scr 3/10 figure 1. st7scr block diagram 8-bit core alu address and data bus oscin oscout pa6 4mhz control ram (512 bytes) program (16k bytes) memory 8-bit timer lvd v pp usbdp usbdm usbvcc port c pc[7:0] pb[7:0] pa[5:0] supply manager pll oscillator usb port b port a usb data buffer (256 bytes) divider 8 mhz 3v/1.8v vreg dc/dc crddet crdio crdc4 crdc8 crdrst crdclk pd[7:0] iso7816 uart port d converter crdvcc self watchdog led led[3:0] or 4 mhz 48 mhz diode 1
st7scr 4/10 2 pin description figure 2. 64-pin tqfp package pinout wakup2/pa2 wakup2/pa3 pd0 pd1 pd2 pd3 pd4 pd5 pd6 pd7 oscin oscout crddet vdd wakup2/iccdata/pa0 wakup2/iccclk/pa1 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 17 18 19 20 21 22 23 24 29 30 31 32 25 26 27 28 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 c4 crdio c8 gnd pb0 pb1 pb2 pb3 pb4 pb5 pb6 pb7 nc crdclk nc pa6 v pp pc7/wakup1 pc6/wakup1 pc5/wakup1 pc4/wakup1 pc3/wakup1 pc2/wakup1 pc1/wakup1 pc0/wakup1 gnd vdd nc dp dm led0 self1 self2 pa5 pa4 nc nc led3 led2 led1 vdd vdda usbvcc crdvcc gnd gnda diode crdrst nc = not connected 1
st7scr 5/10 pin description (contd) figure 3. 24-pin so package pinout 14 13 11 12 15 16 17 18 led0 dm dp usbvcc oscin oscout v pp 1 2 3 4 5 6 7 8 9 10 diode crdclk crdrst crdvcc pa6 crdio 19 20 c8 crddet iccdata/wakup2/pa0 v dda c4 gnda iccclk/wakup2/pa1 nc gnd 21 22 23 24 v dd self 1
st7scr 6/10 pin description (contd) legend / abbreviations: type: i = input, o = output, s = supply in/output level: c t = cmos 0.3v dd /0.7v dd with input trigger output level: hs = 10ma high sink (on n-buffer only) port and control configuration: C input:float = floating, wpu = weak pull-up, int = in- terrupt, ana = analog C output: od = open drain, t = true open drain, pp = push-pull table 1. pin description pin n pin name type level v card supplied port / control main function (after reset) alternate function tqfp64 so24 input output input output wpu int od pp 1 5 crdrst o c t x x smartcard reset 2 nc not connected 3 6 crdclk o c t x x smartcard clock 4 nc not connected 57c4 o c t x x smartcard c4 6 8 crdio i/o c t x x x smartcard i/o 79c8 o c t x x smartcard c8 8 3 gnd s ground 9 pb0 o c t x x port b0 1) 10 pb1 o c t x x port b1 1) 11 pb2 o c t x x port b2 1) 12 pb3 o c t x x port b3 1) 13 pb4 o c t x x port b4 1) 14 pb5 o c t x x port b5 1) 15 pb6 o c t x x port b6 1) 16 pb7 o c t x x port b7 1) 17 10 crddet i c t x smartcard detection 18 vdd s power supply voltage 4v-5.5v 19 11 pa0/wakup2/ iccdata i/o c t x x x x port a0 interrupt, in-circuit communication data input 20 12 pa1/wakup2/ iccclk i/o c t x x x x port a1 interrupt, in-circuit communication clock input 21 pa2/wakup2 i/o c t x x x x port a2 1) interrupt 22 pa3/wakup2 i/o c t x x x x port a3 1) interrupt 23 pd0 o c t x x port d0 1) 24 pd1 o c t x x port d1 1) 1
st7scr 7/10 25 pd2 o c t x x port d2 1) 26 pd3 o c t x x port d3 1) 27 pd4 o c t x x port d4 1) 28 pd5 o c t x x port d5 1) 29 pd6 o c t x x port d6 1) 30 pd7 o c t x x port d7 1) 31 14 oscin c t input/output oscillator pins. these pins connect a 4mhz parallel-resonant crystal, or an external source to the on-chip oscillator. 32 15 oscout c t 33 vdd s power supply voltage 4v-5.5v 34 gnd s ground 35 pc0/wakup1 i c t x x pc0 1) external interrupt 36 pc1/wakup1 i c t x x pc1 1) external interrupt 37 pc2/wakup1 i c t x x pc2 1) external interrupt 38 pc3/wakup1 i c t x x pc3 1) external interrupt 39 pc4/wakup1 i c t x x pc4 1) external interrupt 40 pc5/wakup1 i c t x x pc5 1) external interrupt 41 pc6/wakup1 i c t x x pc6 1) external interrupt 42 pc7/wakup1 i c t x x pc7 1) external interrupt 43 16 v pp s flash programming voltage. must be held low in nor- mal operating mode. 44 17 pa6 i c t pa6 45 18 led0 o hs x constant current output 46 19 dm i/o c t usb data minus line 47 20 dp i/o c t usb data plus line 48 nc not connected 49 21 usbvcc o c t 3.3 v output for usb 50 22 v dda s power supply voltage 4v-5.5v 51 23 v dd s power supply voltage 4v-5.5v 52 led1 o hs x constant current output 53 led2 o hs x constant current output 54 led3 o hs x constant current output 55 nc not connected 56 nc not connected pin n pin name type level v card supplied port / control main function (after reset) alternate function tqfp64 so24 input output input output wpu int od pp
st7scr 8/10 note 1 : keyboard interface 57 pa4 i/o c t x x x x port a4 58 pa5 i/o c t x x x x port a5 59 24 self2 o c t an external inductance must be connected to these pins for the step up converter 60 24 self1 o c t 61 1 diode s c t an external diode must be connected to this pin for the step up converter 62 2 gnda s ground 63 3 gnd s 64 4 cdrvcc o c t x smartcard supply pin pin n pin name type level v card supplied port / control main function (after reset) alternate function tqfp64 so24 input output input output wpu int od pp
st7scr 9/10 3 package characteristics 3.1 package mechanical data figure 4. 64-pin plastic quad flat package figure 5. 24-pin plastic small outline package, 300-mil width dim. mm inches min typ max min typ max a 3.40 0.134 a1 0.25 0.50 0.010 0.020 a2 2.50 2.70 2.90 0.098 0.106 0.114 b 0.29 0.45 0.011 0.018 c 0.11 0.23 0.004 0.009 d 17.20 0.677 d1 14.00 0.551 d2 12.00 0.472 e 17.20 0.677 e1 14.00 0.551 e2 12.00 0.472 e 0.80 0.031 l 0.73 0.88 1.03 0.029 0.035 0.041 number of pins n 64 0- 7 1.60 mm c l e a a2 a1 b d d1 d2 e e1 e2 0- 7 1.60 mm c l e b d d1 d2 e2 0- 7 1.60 mm c l e a2 a1 b d d1 d2 dim. mm inches min typ max min typ max a 2.35 2.65 0.093 0.104 a1 0.10 0.30 0.004 0.012 b 0.33 0.51 0.013 0.020 c 0.23 0.32 0.009 0.013 d 15.20 15.60 0.599 0.614 e 7.40 7.60 0.291 0.299 e 1.27 0.050 h 10.00 10.65 0.394 0.419 h 0.25 0.75 0.010 0.030 a 0 8 0 8 l 0.40 1.27 0.016 0.050 number of pins n 24 dim. mm inches min typ max min typ max jedec ref. ms- c h x 45 l a a a1 e b d h e
st7scr 10/10 notes: information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without the express written approval of stmicroele ctronics. the st logo is a registered trademark of stmicroelectronics ? 2002 stmicroelectronics - all rights reserved. purchase of i 2 c components by stmicroelectronics conveys a license under the philips i 2 c patent. rights to use these components in an i 2 c system is granted provided that the system conforms to the i 2 c standard specification as defined by philips. stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - u.s.a. http://www.st.com
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