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| dsPIC33FJ12GP201/202 Data Sheet High-Performance, 16-Bit Digital Signal Controllers (c) 2007 Microchip Technology Inc. Preliminary DS70264B Note the following details of the code protection feature on Microchip devices: * * * Microchip products meet the specification contained in their particular Microchip Data Sheet. Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. Microchip is willing to work with the customer who is concerned about the integrity of their code. Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as "unbreakable." * * Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip's code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, KEELOQ, KEELOQ logo, microID, MPLAB, PIC, PICmicro, PICSTART, PRO MATE, PowerSmart, rfPIC, and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. AmpLab, FilterLab, Linear Active Thermistor, Migratable Memory, MXDEV, MXLAB, PS logo, SEEVAL, SmartSensor and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, PICkit, PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. (c) 2007, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company's quality system processes and procedures are for its PIC(R) MCUs and dsPIC(R) DSCs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001:2000 certified. DS70264B-page ii Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 High-Performance, 16-Bit Digital Signal Controllers Operating Range: * Up to 40 MIPS operation (at 3.0-3.6V): - Industrial temperature range (-40C to +85C) - Extended temperature range (-40C to +125C) Digital I/O: * * * * * * * Peripheral Pin Select Functionality Up to 21 programmable digital I/O pins Wake-up/interrupt-on-change for up to 21 pins Output pins can drive from 3.0V to 3.6V Up to 5V output with open drain configuration All digital input pins are 5V tolerant 4 mA sink on all I/O pins High-Performance DSC CPU: * * * * * * * * * * Modified Harvard architecture C compiler optimized instruction set 16-bit wide data path 24-bit wide instructions Linear program memory addressing up to 4M instruction words Linear data memory addressing up to 64 Kbytes 83 base instructions, mostly 1 word/1 cycle Sixteen 16-bit general purpose registers Two 40-bit accumulators with rounding and saturation options Flexible and powerful addressing modes: - Indirect - Modulo - Bit-Reversed Software stack 16 x 16 fractional/integer multiply operations 32/16 and 16/16 divide operations Single-cycle multiply and accumulate: - Accumulator write back for DSP operations - Dual data fetch Up to 16-bit shifts for up to 40-bit data System Management: * Flexible clock options: - External, crystal, resonator, internal RC - Fully integrated Phase-Locked Loop (PLL) - Extremely low jitter PLL * Power-up Timer * Oscillator Start-up Timer/Stabilizer * Watchdog Timer with its own RC oscillator * Fail-Safe Clock Monitor * Reset by multiple sources Power Management: * On-chip 2.5V voltage regulator * Switch between clock sources in real time * Idle, Sleep and Doze modes with fast wake-up * * * * Timers/Capture/Compare: * Timer/Counters, up to three 16-bit timers: - Can pair up to make one 32-bit timer - 1 timer runs as Real-Time Clock with external 32.768 kHz oscillator - Programmable prescaler * Input Capture (up to 4 channels): - Capture on up, down or both edges - 16-bit capture input functions - 4-deep FIFO on each capture * Output Compare (up to 2 channels): - Single or Dual 16-Bit Compare mode - 16-bit Glitchless PWM Mode * Interrupt Controller: * * * * * * 5-cycle latency 118 interrupt vectors Up to 21 available interrupt sources Up to 3 external interrupts 7 programmable priority levels 4 processor exceptions On-Chip Flash and SRAM: * Flash program memory (12 Kbytes) * Data SRAM (1024 bytes) * Boot and General Security for Program Flash (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 1 dsPIC33FJ12GP201/202 Communication Modules: * 4-wire SPI: - Framing supports I/O interface to simple codecs - Supports 8-bit and 16-bit data - Supports all serial clock formats and sampling modes * I2CTM: - Full Multi-Master Slave mode support - 7-bit and 10-bit addressing - Bus collision detection and arbitration - Integrated signal conditioning - Slave address masking * UART: - Interrupt on address bit detect - Interrupt on UART error - Wake-up on Start bit from Sleep mode - 4 character TX and RX FIFO buffers - LIN bus support - IrDA(R) encoding and decoding in hardware - High-Speed Baud mode - Hardware Flow Control with CTS and RTS Analog-to-Digital Converters (ADCs): * 10-bit, 1.1 Msps or 12-bit, 500 Ksps conversion: - 2 and 4 simultaneous samples (10-bit ADC) - Up to 10 input channels with auto-scanning - Conversion start can be manual or synchronized with 1 of 4 trigger sources - Conversion possible in Sleep mode - 2 LSb max integral nonlinearity - 1 LSb max differential nonlinearity CMOS Flash Technology: * * * * * Low-power, high-speed Flash technology Fully static design 3.3V (10%) operating voltage Industrial and extended temperature Low power consumption Packaging: * 18-pin SDIP/SOIC * 28-pin SDIP/SOIC/QFN Note: See the device variant tables for exact peripheral features per device. DS70264B-page 2 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 dsPIC33FJ12GP201/202 Product Families The device names, pin counts, memory sizes and peripheral availability of each family are listed below, followed by their pinout diagrams. TABLE 1: dsPIC33FJ12GP201/202 CONTROLLER FAMILIES Program Flash Memory (Kbyte) Remappable Peripherals 10-Bit/12-Bit ADC Output Compare Std. PWM I/O Pins (Max) 13 21 Input Capture Packages SDIP SOIC SDIP SOIC QFN Remappable Pins 16-bit Timer RAM (Kbyte) UART dsPIC33FJ12GP201 dsPIC33FJ12GP202 18 28 12 12 1 1 8 16 3(1) 3(1) 4 4 2 2 1 1 SPI Device 1 1 1 ADC, 6 ch 1 ADC, 10 ch Note 1: Only 2 out of 3 timers are remappable. (c) 2007 Microchip Technology Inc. Preliminary I2CTM 1 1 Pins DS70264B-page 3 dsPIC33FJ12GP201/202 dsPIC33FJ12GP201 18-Pin SDIP/SOIC Package Diagram 18-PIN SDIP, SOIC MCLR PGD2/EMUD2/AN0/VREF+/CN2/RA0 PGC2/EMUC2/AN1/VREF-/CN3/RA1 PGD1/EMUD1/AN2/RP0/CN4/RB0 PGC1/EMUC1/AN3/RP1/CN5/RB1 OSCI/CLKI/CN30/RA2 OSCO/CLKO/CN29/RA3 PGD3/EMUD3/SOSCI/RP4/CN1/RB4 PGC3/EMUC3/SOSCO/T1CK/CN0/RA4 1 2 3 4 5 6 7 8 9 VDD VSS AN6/RP15/CN11/RB15 AN7/RP14/CN12/RB14 VDDCORE VSS SCL1/RP9/CN21/RB9 SDA1/RP8/CN22/RB8 INT0/RP7/CN23/RB7 18 17 16 15 14 13 12 11 10 Pin Diagrams dsPIC33FJ12GP202 28-Pin SDIP/SOIC Package Diagram 28-PIN SDIP, SOIC dsPIC33FJ12GP201 MCLR PGD2/EMUD2/AN0/VREF+/CN2/RA0 PGC2/EMUC2/AN1/VREF-/CN3/RA1 PGD1/EMUD1/AN2/RP0/CN4/RB0 PGC1/EMUC1/AN3/RP1/CN5/RB1 AN4/RP2/CN6/RB2 AN5/RP3/CN7/RB3 Vss OSCI/CLKI/CN30/RA2 OSCO/CLKO/CN29/RA3 PGD3/EMUD3/SOSC/RP4/CN1/RB4 PGC3/EMUC3/SOSCO/T1CK/CN0/RA4 VDD ASDA1/RP5/CN27/RB5 1 2 3 4 28 27 26 25 AVDD AV ss AN6/RP15/CN11/RB15 AN7/RP14/CN12/RB14 AN8/RP13/CN13/RB13 AN9/RP12/CN14/RB12 TMS/RP11/CN15/RB11 TDI/RP10/CN16/RB10 VDDCORE Vss TDO/SDA1/RP9/CN21/RB9 TCK/SCL1/RP8/CN22/RB8 INT0/RP7/CN23/RB7 ASCL1/RP6/CN24/RB6 dsPIC33FJ12GP202 5 6 7 8 9 10 11 12 13 14 24 23 22 21 20 19 18 17 16 15 DS70264B-page 4 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 dsPIC33FJ12GP202 28-Pin QFN Package Diagram 28-Pin QFN 6x6mm PGD2/EMUD2/AN0/VREF+/CN2/RA0 PGC2/EMUC2/AN1/VREF-/CN3/RA1 28 PGD1/EMUD1/AN2/RP0/CN4/RB0 PGC1/EMUC1/AN3/RP1/CN5/RB1 AN4/RP2/CN6/RB2 AN5/RP3/CN7/RB3 VSS OSCI/CLKI/CN30/RA2 OSCO/CLKO/CN29/RA3 1 2 3 4 5 6 7 8 PGD3/EMUD3/SOSCI/RP4/CN1/RB4 27 26 25 24 23 AN7/RP14/CN12/RB14 22 21 20 19 AN8/RP13/CN13/RB13 AN9/RP12/CN14/RB12 TMS/RP11/CN15/RB11 TDI/RP10/CN16/RB10 VDDCORE VSS TDO/SDA1/RP9/CN21/RB9 18 17 16 15 14 TCK/SCL1/RP8/CN22/RB8 dsPIC33FJ12GP202 9 PGC3/EMUC3/SOSCO/T1CK/CN0/RA4 10 VDD 11 ASDA1/RP5/CN27/RB5 12 ASCL1/RP6/CN24/RB6 (c) 2007 Microchip Technology Inc. Preliminary INT0/RP7/CN23/RB7 AN6/RP15/CN11/RB15 13 MCLR AVDD AVSS DS70264B-page 5 dsPIC33FJ12GP201/202 Table of Contents 1.0 Device Overview .......................................................................................................................................................................... 7 2.0 CPU ............................................................................................................................................................................................ 11 3.0 Memory Organization ................................................................................................................................................................. 23 4.0 Flash Program Memory .............................................................................................................................................................. 47 5.0 Resets ....................................................................................................................................................................................... 53 6.0 Interrupt Controller ..................................................................................................................................................................... 59 7.0 Oscillator Configuration .............................................................................................................................................................. 87 8.0 Power-Saving Features .............................................................................................................................................................. 97 9.0 I/O Ports ..................................................................................................................................................................................... 99 10.0 Timer1 ...................................................................................................................................................................................... 119 11.0 Timer2/3 Feature...................................................................................................................................................................... 121 12.0 Input Capture............................................................................................................................................................................ 127 13.0 Output Compare ....................................................................................................................................................................... 129 14.0 Serial Peripheral Interface (SPI)............................................................................................................................................... 135 15.0 Inter-Integrated Circuit (I2C) ..................................................................................................................................................... 143 16.0 Universal Asynchronous Receiver Transmitter (UART) ........................................................................................................... 153 17.0 10-bit/12-bit Analog-to-Digital Converter (ADC) ....................................................................................................................... 161 18.0 Special Features ...................................................................................................................................................................... 173 19.0 Instruction Set Summary .......................................................................................................................................................... 179 20.0 Development Support............................................................................................................................................................... 187 21.0 Electrical Characteristics .......................................................................................................................................................... 191 22.0 Packaging Information.............................................................................................................................................................. 225 Appendix A: Revision History............................................................................................................................................................. 231 Index ................................................................................................................................................................................................. 233 The Microchip Web Site ..................................................................................................................................................................... 237 Customer Change Notification Service .............................................................................................................................................. 237 Customer Support .............................................................................................................................................................................. 237 Reader Response .............................................................................................................................................................................. 238 Product Identification System............................................................................................................................................................. 239 TO OUR VALUED CUSTOMERS It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and enhanced as new volumes and updates are introduced. If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via E-mail at docerrors@microchip.com or fax the Reader Response Form in the back of this data sheet to (480) 792-4150. We welcome your feedback. Most Current Data Sheet To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at: http://www.microchip.com You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page. The last character of the literature number is the version number, (e.g., DS30000A is version A of document DS30000). Errata An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revision of silicon and revision of document to which it applies. To determine if an errata sheet exists for a particular device, please check with one of the following: * Microchip's Worldwide Web site; http://www.microchip.com * Your local Microchip sales office (see last page) When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature number) you are using. Customer Notification System Register on our web site at www.microchip.com to receive the most current information on all of our products. DS70264B-page 6 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 1.0 Note: DEVICE OVERVIEW This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. This document contains device specific information for the dsPIC33FJ12GP201/202 Digital Signal Controller (DSC) devices. The dsPIC33F devices contain extensive Digital Signal Processor (DSP) functionality with a high performance 16-bit microcontroller (MCU) architecture. Figure 1-1 shows a general block diagram of the core and peripheral modules in the dsPIC33FJ12GP201/202 family of devices. Table 1-1 lists the functions of the various pins shown in the pinout diagrams. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 7 dsPIC33FJ12GP201/202 FIGURE 1-1: PSV & Table Data Access Control Block Interrupt Controller 8 23 23 PCU PCH PCL Program Counter Loop Stack Control Control Logic Logic X RAM Address Latch Y RAM Address Latch 16 PORTB dsPIC33FJ12GP201/202 BLOCK DIAGRAM Y Data Bus X Data Bus 16 Data Latch PORTA 16 16 16 Data Latch 23 16 16 Remappable Pins Address Latch Address Generator Units Program Memory Address Bus Data Latch 24 ROM Latch 16 Literal Data EA MUX 16 Instruction Decode & Control Control Signals to Various Blocks OSC2/CLKO OSC1/CLKI Timing Generation FRC/LPRC Oscillators Precision Band Gap Reference Voltage Regulator Power-up Timer Oscillator Start-up Timer Power-on Reset Watchdog Timer Brown-out Reset Instruction Reg 16 DSP Engine 16 x 16 W Register Array 16 Divide Support 16-bit ALU 16 VDDCORE/VCAP VDD, VSS MCLR Timers 1-3 UART1 ADC1 OC/ PWM1-2 IC1,2,7,8 CNx I2C1 Note: Not all pins or features are implemented on all device pinout configurations. See pinout diagrams for the specific pins and features on each device. DS70264B-page 8 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 1-1: Pin Name AN0-AN9 CLKI CLKO PINOUT I/O DESCRIPTIONS Pin Type I I O Buffer Type Analog Analog input channels. Description ST/CMOS External clock source input. Always associated with OSC1 pin function. -- Oscillator crystal output. Connects to crystal or resonator in Crystal Oscillator mode. Optionally functions as CLKO in RC and EC modes. Always associated with OSC2 pin function. ST/CMOS Oscillator crystal input. ST buffer when configured in RC mode; CMOS -- otherwise. Oscillator crystal output. Connects to crystal or resonator in Crystal Oscillator mode. Optionally functions as CLKO in RC and EC modes. ST/CMOS 32.768 kHz low-power oscillator crystal input; CMOS otherwise. -- 32.768 kHz low-power oscillator crystal output. ST Change notification inputs. Can be software programmed for internal weak pull-ups on all inputs. OSC1 OSC2 I I/O SOSCI SOSCO CN0-CN7 CN11-CN15 CN21-CN24 CN27 CN29-CN30 IC0-IC1 IC7-IC8 OCFA OC1-OC2 INT0 INT1 INT2 RA0-RA4 RB0-RB15 T1CK T2CK T3CK U1CTS U1RTS U1RX U1TX SCK1 SDI1 SDO1 SS1 SCL1 SDA1 ASCL1 ASDA1 TMS TCK TDI TDO PGD1/EMUD1 PGC1/EMUC1 PGD2/EMUD2 PGC2/EMUC2 PGD3/EMUD3 PGC3/EMUC3 I O I I I O I I I I/O I/O I I I I O I O I/O I O I/O I/O I/O I/O I/O I I I O I/O I I/O I I/O I ST ST -- ST ST ST ST ST ST ST ST ST -- ST -- ST ST -- ST ST ST ST ST ST ST ST -- ST ST ST ST ST ST Capture inputs 1/2 Capture inputs 7/8 Compare Fault A input (for Compare Channels 1 and 2). Compare outputs 1 through 2. External interrupt 0. External interrupt 1. External interrupt 2. PORTA is a bidirectional I/O port. PORTB is a bidirectional I/O port. Timer1 external clock input. Timer2 external clock input. Timer3 external clock input. UART1 clear to send. UART1 ready to send. UART1 receive. UART1 transmit. Synchronous serial clock input/output for SPI1. SPI1 data in. SPI1 data out. SPI1 slave synchronization or frame pulse I/O. Synchronous serial clock input/output for I2C1. Synchronous serial data input/output for I2C1. Alternate synchronous serial clock input/output for I2C1. Alternate synchronous serial data input/output for I2C1. JTAG Test mode select pin. JTAG test clock input pin. JTAG test data input pin. JTAG test data output pin. Data I/O pin for programming/debugging communication channel 1. Clock input pin for programming/debugging communication channel 1. Data I/O pin for programming/debugging communication channel 2. Clock input pin for programming/debugging communication channel 2. Data I/O pin for programming/debugging communication channel 3. Clock input pin for programming/debugging communication channel 3. Analog = Analog input O = Output P = Power I = Input Legend: CMOS = CMOS compatible input or output ST = Schmitt Trigger input with CMOS levels (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 9 dsPIC33FJ12GP201/202 TABLE 1-1: Pin Name VDDCORE VSS VREF+ VREFAVDD MCLR AVSS VDD PINOUT I/O DESCRIPTIONS (CONTINUED) Pin Type P P I I P I/P P P Buffer Type -- -- Analog Analog P ST P -- Description CPU logic filter capacitor connection. Ground reference for logic and I/O pins. Analog voltage reference (high) input. Analog voltage reference (low) input. Positive supply for analog modules. Master Clear (Reset) input. This pin is an active-low Reset to the device. Ground reference for analog modules. Positive supply for peripheral logic and I/O pins. Analog = Analog input O = Output P = Power I = Input Legend: CMOS = CMOS compatible input or output ST = Schmitt Trigger input with CMOS levels DS70264B-page 10 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 2.0 Note: CPU This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. through the X and Y AGUs to support dual operand reads, which splits the data address space into two parts. The X and Y data space boundary is device-specific. Overhead-free circular buffers (Modulo Addressing mode) are supported in both X and Y address spaces. The Modulo Addressing removes the software boundary checking overhead for DSP algorithms. Furthermore, the X AGU circular addressing can be used with any of the MCU class of instructions. The X AGU also supports Bit-Reversed Addressing to greatly simplify input or output data reordering for radix-2 FFT algorithms. The upper 32 Kbytes of the data space memory map can optionally be mapped into program space at any 16K program word boundary defined by the 8-bit Program Space Visibility Page (PSVPAG) register. The program to data space mapping feature lets any instruction access program space as if it were data space. The dsPIC33FJ12GP201/202 CPU module has a 16-bit (data) modified Harvard architecture with an enhanced instruction set, including significant support for DSP. The CPU has a 24-bit instruction word with a variable length opcode field. The Program Counter (PC) is 23 bits wide and addresses up to 4M x 24 bits of user program memory space. The actual amount of program memory implemented varies by device. A single-cycle instruction prefetch mechanism is used to help maintain throughput and provides predictable execution. All instructions execute in a single cycle, with the exception of instructions that change the program flow, the double-word move (MOV.D) instruction and the table instructions. Overhead-free program loop constructs are supported using the DO and REPEAT instructions, both of which are interruptible at any point. The dsPIC33FJ12GP201/202 devices have sixteen, 16-bit working registers in the programmer's model. Each of the working registers can serve as a data, address or address offset register. The 16th working register (W15) operates as a software Stack Pointer (SP) for interrupts and calls. The dsPIC33FJ12GP201/202 instruction set has two classes of instructions: MCU and DSP. These two instruction classes are seamlessly integrated into a single CPU. The instruction set includes many addressing modes and is designed for optimum C compiler efficiency. For most instructions, the dsPIC33FJ12GP201/202 is capable of executing a data (or program data) memory read, a working register (data) read, a data memory write and a program (instruction) memory read per instruction cycle. As a result, three parameter instructions can be supported, allowing A + B = C operations to be executed in a single cycle. A block diagram of the CPU is shown in Figure 2-1. The programmer's model for the dsPIC33FJ12GP201/202 is shown in Figure 2-2. 2.2 DSP Engine Overview The DSP engine features a high-speed 17-bit by 17-bit multiplier, a 40-bit ALU, two 40-bit saturating accumulators and a 40-bit bidirectional barrel shifter. The barrel shifter is capable of shifting a 40-bit value up to 16 bits right or left, in a single cycle. The DSP instructions operate seamlessly with all other instructions and have been designed for optimal real-time performance. The MAC instruction and other associated instructions can concurrently fetch two data operands from memory while multiplying two W registers and accumulating and optionally saturating the result in the same cycle. This instruction functionality requires that the RAM data space be split for these instructions and linear for all others. Data space partitioning is achieved in a transparent and flexible manner through dedicating certain working registers to each address space. 2.3 Special MCU Features The dsPIC33FJ12GP201/202 features a 17-bit by 17-bit single-cycle multiplier that is shared by both the MCU ALU and DSP engine. The multiplier can perform signed, unsigned and mixed-sign multiplication. Using a 17-bit by 17-bit multiplier for 16-bit by 16-bit multiplication not only allows you to perform mixed-sign multiplication, it also achieves accurate results for special operations, such as (-1.0) x (-1.0). The dsPIC33FJ12GP201/202 supports 16/16 and 32/16 divide operations, both fractional and integer. All divide instructions are iterative operations. They must be executed within a REPEAT loop, resulting in a total execution time of 19 instruction cycles. The divide operation can be interrupted during any of those 19 cycles without loss of data. A 40-bit barrel shifter is used to perform up to a 16-bit left or right shift in a single cycle. The barrel shifter can be used by both MCU and DSP instructions. 2.1 Data Addressing Overview The data space can be addressed as 32K words or 64 Kbytes and is split into two blocks, referred to as X and Y data memory. Each memory block has its own independent Address Generation Unit (AGU). The MCU class of instructions operates solely through the X memory AGU, which accesses the entire memory map as one linear data space. Certain DSP instructions operate (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 11 dsPIC33FJ12GP201/202 FIGURE 2-1: PSV & Table Data Access Control Block Interrupt Controller 8 23 23 PCU PCH PCL Program Counter Loop Stack Control Control Logic Logic 16 dsPIC33FJ12GP201/202 CPU CORE BLOCK DIAGRAM Y Data Bus X Data Bus 16 16 Data Latch X RAM Address Latch 16 Data Latch Y RAM Address Latch 16 23 16 Address Latch 16 Address Generator Units Program Memory Address Bus Data Latch 24 ROM Latch 16 Literal Data 16 EA MUX Instruction Decode & Control Instruction Reg 16 Control Signals to Various Blocks DSP Engine 16 x 16 W Register Array 16 Divide Support 16-bit ALU 16 To Peripheral Modules DS70264B-page 12 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 FIGURE 2-2: dsPIC33FJ12GP201/202 PROGRAMMER'S MODEL D15 W0/WREG W1 W2 W3 W4 DSP Operand Registers W5 W6 W7 W8 DSP Address Registers W9 W10 W11 W12/DSP Offset W13/DSP Write Back W14/Frame Pointer W15/Stack Pointer SPLIM AD39 DSP Accumulators PC22 0 TBLPAG 7 PSVPAG 0 Program Space Visibility Page Address 15 RCOUNT 15 DCOUNT 22 DOSTART 22 DOEND 15 CORCON OA OB SA SB OAB SAB DA SRH DC IPL2 IPL1 IPL0 RA SRL N OV 0 Core Configuration Register DO Loop End Address 0 DO Loop Start Address 0 DO Loop Counter 0 REPEAT Loop Counter Data Table Page Address ACCA ACCB PC0 0 7 Program Counter AD31 Stack Pointer Limit Register AD15 AD0 Working Registers DO Shadow D0 PUSH.S Shadow Legend Z C STATUS Register (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 13 dsPIC33FJ12GP201/202 2.4 CPU Control Registers CPU control registers include: * SR: CPU Status Register * CORCON: CORE Control Register REGISTER 2-1: R-0 OA bit 15 R/W-0(2) bit 7 Legend: C = Clear only bit S = Set only bit `1' = Bit is set bit 15 SR: CPU STATUS REGISTER R-0 OB R/C-0 SA(1) R/C-0 SB(1) R-0 OAB R/C-0 SAB R -0 DA R/W-0 DC bit 8 R/W-0(3) R/W-0(3) R-0 RA R/W-0 N R/W-0 OV R/W-0 Z R/W-0 C bit 0 IPL<2:0> (2) R = Readable bit W = Writable bit `0' = Bit is cleared U = Unimplemented bit, read as `0' -n = Value at POR x = Bit is unknown OA: Accumulator A Overflow Status bit 1 = Accumulator A overflowed 0 = Accumulator A has not overflowed OB: Accumulator B Overflow Status bit 1 = Accumulator B overflowed 0 = Accumulator B has not overflowed SA: Accumulator A Saturation `Sticky' Status bit(1) 1 = Accumulator A is saturated or has been saturated at some time 0 = Accumulator A is not saturated SB: Accumulator B Saturation `Sticky' Status bit(1) 1 = Accumulator B is saturated or has been saturated at some time 0 = Accumulator B is not saturated OAB: OA || OB Combined Accumulator Overflow Status bit 1 = Accumulators A or B have overflowed 0 = Neither Accumulators A or B have overflowed SAB: SA || SB Combined Accumulator `Sticky' Status bit 1 = Accumulators A or B are saturated or have been saturated at some time in the past 0 = Neither Accumulator A or B are saturated Note: This bit can be read or cleared (not set). Clearing this bit will clear SA and SB. DA: DO Loop Active bit 1 = DO loop in progress 0 = DO loop not in progress This bit can be read or cleared (not set). The IPL<2:0> bits are concatenated with the IPL<3> bit (CORCON<3>) to form the CPU Interrupt Priority Level. The value in parentheses indicates the IPL if IPL<3> = 1. User interrupts are disabled when IPL<3> = 1. The IPL<2:0> Status bits are read only when NSTDIS = 1 (INTCON1<15>). bit 14 bit 13 bit 12 bit 11 bit 10 bit 9 Note 1: 2: 3: DS70264B-page 14 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 2-1: bit 8 SR: CPU STATUS REGISTER (CONTINUED) DC: MCU ALU Half Carry/Borrow bit 1 = A carry-out from the 4th low-order bit (for byte-sized data) or 8th low-order bit (for word-sized data) of the result occurred 0 = No carry-out from the 4th low-order bit (for byte-sized data) or 8th low-order bit (for word-sized data) of the result occurred IPL<2:0>: CPU Interrupt Priority Level Status bits(2) 111 = CPU Interrupt Priority Level is 7 (15), user interrupts disabled 110 = CPU Interrupt Priority Level is 6 (14) 101 = CPU Interrupt Priority Level is 5 (13) 100 = CPU Interrupt Priority Level is 4 (12) 011 = CPU Interrupt Priority Level is 3 (11) 010 = CPU Interrupt Priority Level is 2 (10) 001 = CPU Interrupt Priority Level is 1 (9) 000 = CPU Interrupt Priority Level is 0 (8) RA: REPEAT Loop Active bit 1 = REPEAT loop in progress 0 = REPEAT loop not in progress N: MCU ALU Negative bit 1 = Result was negative 0 = Result was non-negative (zero or positive) OV: MCU ALU Overflow bit This bit is used for signed arithmetic (2's complement). It indicates an overflow of a magnitude that causes the sign bit to change state. 1 = Overflow occurred for signed arithmetic (in this arithmetic operation) 0 = No overflow occurred Z: MCU ALU Zero bit 1 = An operation that affects the Z bit has set it at some time in the past 0 = The most recent operation that affects the Z bit has cleared it (i.e., a non-zero result) C: MCU ALU Carry/Borrow bit 1 = A carry-out from the Most Significant bit of the result occurred 0 = No carry-out from the Most Significant bit of the result occurred This bit can be read or cleared (not set). The IPL<2:0> bits are concatenated with the IPL<3> bit (CORCON<3>) to form the CPU Interrupt Priority Level. The value in parentheses indicates the IPL if IPL<3> = 1. User interrupts are disabled when IPL<3> = 1. The IPL<2:0> Status bits are read only when NSTDIS = 1 (INTCON1<15>). bit 7-5 bit 4 bit 3 bit 2 bit 1 bit 0 Note 1: 2: 3: (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 15 dsPIC33FJ12GP201/202 REGISTER 2-2: U-0 -- bit 15 R/W-0 SATA bit 7 Legend: R = Readable bit 0' = Bit is cleared bit 15-13 bit 12 CORCON: CORE CONTROL REGISTER U-0 -- U-0 -- R/W-0 US R/W-0 EDT(1) R-0 R-0 DL<2:0> R-0 bit 8 R/W-0 SATB R/W-1 SATDW R/W-0 ACCSAT R/C-0 IPL3(2) R/W-0 PSV R/W-0 RND R/W-0 IF bit 0 C = Clear only bit W = Writable bit `x = Bit is unknown -n = Value at POR `1' = Bit is set U = Unimplemented bit, read as `0' bit 11 bit 10-8 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 Unimplemented: Read as `0' US: DSP Multiply Unsigned/Signed Control bit 1 = DSP engine multiplies are unsigned 0 = DSP engine multiplies are signed EDT: Early DO Loop Termination Control bit(1) 1 = Terminate executing DO loop at end of current loop iteration 0 = No effect DL<2:0>: DO Loop Nesting Level Status bits 111 = 7 DO loops active * * * 001 = 1 DO loop active 000 = 0 DO loops active SATA: ACCA Saturation Enable bit 1 = Accumulator A saturation enabled 0 = Accumulator A saturation disabled SATB: ACCB Saturation Enable bit 1 = Accumulator B saturation enabled 0 = Accumulator B saturation disabled SATDW: Data Space Write from DSP Engine Saturation Enable bit 1 = Data space write saturation enabled 0 = Data space write saturation disabled ACCSAT: Accumulator Saturation Mode Select bit 1 = 9.31 saturation (super saturation) 0 = 1.31 saturation (normal saturation) IPL3: CPU Interrupt Priority Level Status bit 3(2) 1 = CPU interrupt priority level is greater than 7 0 = CPU interrupt priority level is 7 or less PSV: Program Space Visibility in Data Space Enable bit 1 = Program space visible in data space 0 = Program space not visible in data space RND: Rounding Mode Select bit 1 = Biased (conventional) rounding enabled 0 = Unbiased (convergent) rounding enabled IF: Integer or Fractional Multiplier Mode Select bit 1 = Integer mode enabled for DSP multiply operations 0 = Fractional mode enabled for DSP multiply operations This bit will always read as `0'. The IPL3 bit is concatenated with the IPL<2:0> bits (SR<7:5>) to form the CPU interrupt priority level. Note 1: 2: DS70264B-page 16 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 2.5 Arithmetic Logic Unit (ALU) The dsPIC33FJ12GP201/202 ALU is 16 bits wide and is capable of addition, subtraction, bit shifts and logic operations. Unless otherwise mentioned, arithmetic operations are 2's complement in nature. Depending on the operation, the ALU can affect the values of the Carry (C), Zero (Z), Negative (N), Overflow (OV) and Digit Carry (DC) Status bits in the SR register. The C and DC Status bits operate as Borrow and Digit Borrow bits, respectively, for subtraction operations. The ALU can perform 8-bit or 16-bit operations, depending on the mode of the instruction that is used. Data for the ALU operation can come from the W register array or data memory, depending on the addressing mode of the instruction. Likewise, output data from the ALU can be written to the W register array or a data memory location. The dsPIC33FJ12GP201/202 CPU incorporates hardware support for both multiplication and division. This includes a dedicated hardware multiplier and support hardware for 16-bit-divisor division. Refer to the "dsPIC30F/33F Programmer's Reference Manual" (DS70157) for information on the SR bits affected by each instruction. 1. 2. 3. 4. 32-bit signed/16-bit signed divide 32-bit unsigned/16-bit unsigned divide 16-bit signed/16-bit signed divide 16-bit unsigned/16-bit unsigned divide The quotient for all divide instructions ends up in W0 and the remainder in W1. 16-bit signed and unsigned DIV instructions can specify any W register for both the 16-bit divisor (Wn) and any W register (aligned) pair (W(m+1):Wm) for the 32-bit dividend. The divide algorithm takes one cycle per bit of divisor, so both 32-bit/16-bit and 16-bit/16-bit instructions take the same number of cycles to execute. 2.6 DSP Engine The DSP engine consists of a high-speed 17-bit x 17-bit multiplier, a barrel shifter and a 40-bit adder/subtracter (with two target accumulators, round and saturation logic). The dsPIC33FJ12GP201/202 is a single-cycle instruction flow architecture; therefore, concurrent operation of the DSP engine with MCU instruction flow is not possible. However, some MCU ALU and DSP engine resources can be used concurrently by the same instruction (e.g., ED, EDAC). The DSP engine can also perform accumulator-to-accumulator operations that require no additional data. These instructions are ADD, SUB and NEG. The DSP engine has options selected through bits in the CPU Core Control register (CORCON), as listed below: * * * * Fractional or integer DSP multiply (IF) Signed or unsigned DSP multiply (US) Conventional or convergent rounding (RND) Automatic saturation on/off for ACCA (SATA), ACCB (SATB) and writes to data memory (SATDW) * Accumulator Saturation mode selection (ACCSAT) A block diagram of the DSP engine is shown in Figure 2-3. 2.5.1 MULTIPLIER Using the high-speed 17-bit x 17-bit multiplier of the DSP engine, the ALU supports unsigned, signed or mixed-sign operation in several MCU multiplication modes: * * * * * * * 16-bit x 16-bit signed 16-bit x 16-bit unsigned 16-bit signed x 5-bit (literal) unsigned 16-bit unsigned x 16-bit unsigned 16-bit unsigned x 5-bit (literal) unsigned 16-bit unsigned x 16-bit signed 8-bit unsigned x 8-bit unsigned 2.5.2 DIVIDER The divide block supports 32-bit/16-bit and 16-bit/16-bit signed and unsigned integer divide operations with the following data sizes: TABLE 2-1: CLR ED EDAC MAC MAC MOVSAC MPY MPY MPY.N MSC DSP INSTRUCTIONS SUMMARY Algebraic Operation A=0 A = (x - y)2 A = A + (x - y)2 A = A + (x * y) A = A + x2 No change in A A=x*y A=x2 A=-x*y A=A-x*y ACC Write Back Yes No No Yes No Yes No No No Yes Instruction (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 17 dsPIC33FJ12GP201/202 FIGURE 2-3: DSP ENGINE BLOCK DIAGRAM 40 Carry/Borrow Out Carry/Borrow In 40-bit Accumulator A 40-bit Accumulator B Saturate Adder Negate 40 Barrel Shifter 40 S a 40 Round t 16 u Logic r a t e 40 40 16 Sign-Extend Y Data Bus 32 Zero Backfill 33 32 16 17-bit Multiplier/Scaler 16 16 To/From W Array DS70264B-page 18 Preliminary (c) 2007 Microchip Technology Inc. X Data Bus dsPIC33FJ12GP201/202 2.6.1 MULTIPLIER The 17-bit x 17-bit multiplier is capable of signed or unsigned operation and can multiplex its output using a scaler to support either 1.31 fractional (Q31) or 32-bit integer results. Unsigned operands are zero-extended into the 17th bit of the multiplier input value. Signed operands are sign-extended into the 17th bit of the multiplier input value. The output of the 17-bit x 17-bit multiplier/scaler is a 33-bit value that is sign-extended to 40 bits. Integer data is inherently represented as a signed 2's complement value, where the Most Significant bit (MSb) is defined as a sign bit. * The range of an N-bit 2's complement integer is -2N-1 to 2N-1 - 1. * For a 16-bit integer, the data range is -32768 (0x8000) to 32767 (0x7FFF) including `0'. * For a 32-bit integer, the data range is -2,147,483,648 (0x8000 0000) to 2,147,483,647 (0x7FFF FFFF). When the multiplier is configured for fractional multiplication, the data is represented as a 2's complement fraction, where the MSb is defined as a sign bit and the radix point is implied to lie just after the sign bit (QX format). The range of an N-bit 2's complement fraction with this implied radix point is -1.0 to (1 - 21-N). For a 16-bit fraction, the Q15 data range is -1.0 (0x8000) to 0.999969482 (0x7FFF) including `0' and has a precision of 3.01518x10-5. In Fractional mode, the 16 x 16 multiply operation generates a 1.31 product that has a precision of 4.65661 x 10-10. The same multiplier is used to support the MCU multiply instructions which include integer 16-bit signed, unsigned and mixed sign multiply operations. The MUL instruction can be directed to use byte or word-sized operands. Byte operands will direct a 16-bit result, and word operands will direct a 32-bit result to the specified register(s) in the W array. * In the case of addition, the Carry/Borrow input is active-high and the other input is true data (not complemented). * In the case of subtraction, the Carry/Borrow input is active-low and the other input is complemented. The adder/subtracter generates Overflow Status bits, SA/SB and OA/OB, which are latched and reflected in the STATUS register: * Overflow from bit 39: this is a catastrophic overflow in which the sign of the accumulator is destroyed. * Overflow into guard bits 32 through 39: this is a recoverable overflow. This bit is set whenever all the guard bits are not identical to each other. The adder has an additional saturation block that controls accumulator data saturation, if selected. It uses the result of the adder, the Overflow Status bits described previously and the SAT 2.6.2 DATA ACCUMULATORS AND ADDER/SUBTRACTER The data accumulator consists of a 40-bit adder/subtracter with automatic sign extension logic. It can select one of two accumulators (A or B) as its pre-accumulation source and post-accumulation destination. For the ADD and LAC instructions, the data to be accumulated or loaded can be optionally scaled using the barrel shifter prior to accumulation. 2.6.2.1 Adder/Subtracter, Overflow and Saturation The adder/subtracter is a 40-bit adder with an optional zero input into one side, and either true or complement data into the other input. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 19 dsPIC33FJ12GP201/202 The SA and SB bits are modified each time data passes through the adder/subtracter, but can only be cleared by the user application. When set, they indicate that the accumulator has overflowed its maximum range (bit 31 for 32-bit saturation or bit 39 for 40-bit saturation) and will be saturated (if saturation is enabled). When saturation is not enabled, SA and SB default to bit 39 overflow and thus indicate that a catastrophic overflow has occurred. If the COVTE bit in the INTCON1 register is set, SA and SB bits will generate an arithmetic warning trap when saturation is disabled. The Overflow and Saturation Status bits can optionally be viewed in the STATUS Register (SR) as the logical OR of OA and OB (in bit OAB) and the logical OR of SA and SB (in bit SAB). Programs can check one bit in the STATUS register to determine if either accumulator has overflowed, or one bit to determine if either accumulator has saturated. This is useful for complex number arithmetic, which typically uses both accumulators. The device supports three Saturation and Overflow modes: * Bit 39 Overflow and Saturation: When bit 39 overflow and saturation occurs, the saturation logic loads the maximally positive 9.31 (0x7FFFFFFFFF) or maximally negative 9.31 value (0x8000000000) into the target accumulator. The SA or SB bit is set and remains set until cleared by the user application. This condition is referred to as `super saturation' and provides protection against erroneous data or unexpected algorithm problems (such as gain calculations). * Bit 31 Overflow and Saturation: When bit 31 overflow and saturation occurs, the saturation logic then loads the maximally positive 1.31 value (0x007FFFFFFF) or maximally negative 1.31 value (0x0080000000) into the target accumulator. The SA or SB bit is set and remains set until cleared by the user application. When this Saturation mode is in effect, the guard bits are not used, so the OA, OB or OAB bits are never set. * Bit 39 Catastrophic Overflow: The bit 39 Overflow Status bit from the adder is used to set the SA or SB bit, which remains set until cleared by the user application. No saturation operation is performed and the accumulator is allowed to overflow, destroying its sign. If the COVTE bit in the INTCON1 register is set, a catastrophic overflow can initiate a trap exception. * W13, Register Direct: The rounded contents of the non-target accumulator are written into W13 as a 1.15 fraction. * [W13] + = 2, Register Indirect with Post-Increment: The rounded contents of the non-target accumulator are written into the address pointed to by W13 as a 1.15 fraction. W13 is then incremented by 2 (for a word write). 2.6.2.3 Round Logic The round logic is a combinational block that performs a conventional (biased) or convergent (unbiased) round function during an accumulator write (store). The Round mode is determined by the state of the RND bit in the CORCON register. It generates a 16-bit, 1.15 data value that is passed to the data space write saturation logic. If rounding is not indicated by the instruction, a truncated 1.15 data value is stored and the least significant word (lsw) is simply discarded. Conventional rounding zero-extends bit 15 of the accumulator and adds it to the ACCxH word (bits 16 through 31 of the accumulator). * If the ACCxL word (bits 0 through 15 of the accumulator) is between 0x8000 and 0xFFFF (0x8000 included), ACCxH is incremented. * If ACCxL is between 0x0000 and 0x7FFF, ACCxH is left unchanged. A consequence of this algorithm is that over a succession of random rounding operations, the value tends to be biased slightly positive. Convergent (or unbiased) rounding operates in the same manner as conventional rounding, except when ACCxL equals 0x8000. In this case, the Least Significant bit (bit 16 of the accumulator) of ACCxH is examined. * If it is `1', ACCxH is incremented. * If it is `0', ACCxH is not modified. Assuming that bit 16 is effectively random in nature, this scheme removes any rounding bias that may accumulate. The SAC and SAC.R instructions store either a truncated (SAC), or rounded (SAC.R) version of the contents of the target accumulator to data memory via the X bus, subject to data saturation (see Section 2.6.2.4 "Data Space Write Saturation"). For the MAC class of instructions, the accumulator write-back operation functions in the same manner, addressing combined MCU (X and Y) data space though the X bus. For this class of instructions, the data is always subject to rounding. 2.6.2.2 Accumulator `Write Back' The MAC class of instructions (with the exception of MPY, MPY.N, ED and EDAC) can optionally write a rounded version of the high word (bits 31 through 16) of the accumulator that is not targeted by the instruction into data space memory. The write is performed across the X bus into combined X and Y address space. The following addressing modes are supported: DS70264B-page 20 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 2.6.2.4 Data Space Write Saturation 2.6.3 BARREL SHIFTER In addition to adder/subtracter saturation, writes to data space can also be saturated but without affecting the contents of the source accumulator. The data space write saturation logic block accepts a 16-bit, 1.15 fractional value from the round logic block as its input, together with overflow status from the original source (accumulator) and the 16-bit round adder. These inputs are combined and used to select the appropriate 1.15 fractional value as output to write to data space memory. If the SATDW bit in the CORCON register is set, data (after rounding or truncation) is tested for overflow and adjusted accordingly: * For input data greater than 0x007FFF, data written to memory is forced to the maximum positive 1.15 value, 0x7FFF. * For input data less than 0xFF8000, data written to memory is forced to the maximum negative 1.15 value, 0x8000. The Most Significant bit of the source (bit 39) is used to determine the sign of the operand being tested. If the SATDW bit in the CORCON register is not set, the input data is always passed through unmodified under all conditions. The barrel shifter can perform up to 16-bit arithmetic or logic right shifts, or up to 16-bit left shifts in a single cycle. The source can be either of the two DSP accumulators or the X bus (to support multi-bit shifts of register or memory data). The shifter requires a signed binary value to determine both the magnitude (number of bits) and direction of the shift operation. A positive value shifts the operand right. A negative value shifts the operand left. A value of `0' does not modify the operand. The barrel shifter is 40 bits wide, thereby obtaining a 40-bit result for DSP shift operations and a 16-bit result for MCU shift operations. Data from the X bus is presented to the barrel shifter between bit positions 16 and 31 for right shifts, and between bit positions 0 and 16 for left shifts. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 21 dsPIC33FJ12GP201/202 NOTES: DS70264B-page 22 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 3.0 Note: MEMORY ORGANIZATION This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. 3.1 Program Address Space The program address memory space of the dsPIC33FJ12GP201/202 devices is 4M instructions. The space is addressable by a 24-bit value derived either from the 23-bit PC during program execution, or from table operation or data space remapping as described in Section 3.6 "Interfacing Program and Data Memory Spaces". User application access to the program memory space is restricted to the lower half of the address range (0x000000 to 0x7FFFFF). The exception is the use of TBLRD/TBLWT operations, which use TBLPAG<7> to permit access to the Configuration bits and Device ID sections of the configuration memory space. The memory map for the dsPIC33FJ12GP201/202 device is shown in Figure 3-1. The dsPIC33FJ12GP201/202 architecture features separate program and data memory spaces and buses. This architecture also allows the direct access of program memory from the data space during code execution. FIGURE 3-1: PROGRAM MEMORY FOR dsPIC33FJ12GP201/202 DEVICES dsPIC33FJ12GP201/202 GOTO Instruction Reset Address Interrupt Vector Table Reserved Alternate Vector Table User Memory Space 0x000000 0x000002 0x000004 0x0000FE 0x000100 0x000104 0x0001FE 0x000200 User Program Flash Memory (4K instructions) 0x001FFE 0x002000 Unimplemented (Read `0's) 0x7FFFFE 0x800000 Reserved Configuration Memory Space Device Configuration Registers 0xF7FFFE 0xF80000 0xF80017 0xF80018 Reserved DEVID (2) 0xFEFFFE 0xFF0000 0xFFFFFE (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 23 dsPIC33FJ12GP201/202 3.1.1 PROGRAM MEMORY ORGANIZATION 3.1.2 INTERRUPT AND TRAP VECTORS The program memory space is organized in word-addressable blocks. Although it is treated as 24 bits wide, it is more appropriate to think of each address of the program memory as a lower and upper word, with the upper byte of the upper word being unimplemented. The lower word always has an even address, while the upper word has an odd address (Figure 3-2). Program memory addresses are always word-aligned on the lower word, and addresses are incremented or decremented by two during code execution. This arrangement provides compatibility with data memory space addressing and makes data in the program memory space accessible. All dsPIC33FJ12GP201/202 devices reserve the addresses between 0x00000 and 0x000200 for hard-coded program execution vectors. A hardware Reset vector is provided to redirect code execution from the default value of the PC on device Reset to the actual start of code. A GOTO instruction is programmed by the user application at 0x000000, with the actual address for the start of code at 0x000002. dsPIC33FJ12GP201/202 devices also have two interrupt vector tables, located from 0x000004 to 0x0000FF and 0x000100 to 0x0001FF. These vector tables allow each of the many device interrupt sources to be handled by separate Interrupt Service Routines (ISRs). A more detailed discussion of the interrupt vector tables is provided in Section 6.1 "Interrupt Vector Table". FIGURE 3-2: msw Address 0x000001 0x000003 0x000005 0x000007 PROGRAM MEMORY ORGANIZATION most significant word 23 00000000 00000000 00000000 00000000 Program Memory `Phantom' Byte (read as `0') Instruction Width 16 least significant word 8 0 0x000000 0x000002 0x000004 0x000006 PC Address (lsw Address) DS70264B-page 24 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 3.2 Data Address Space The dsPIC33FJ12GP201/202 CPU has a separate 16-bit-wide data memory space. The data space is accessed using separate Address Generation Units (AGUs) for read and write operations. The data memory maps is shown in Figure 3-3. All Effective Addresses (EAs) in the data memory space are 16 bits wide and point to bytes within the data space. This arrangement gives a data space address range of 64 Kbytes or 32K words. The lower half of the data memory space (that is, when EA<15> = 0) is used for implemented memory addresses, while the upper half (EA<15> = 1) is reserved for the Program Space Visibility area (see Section 3.6.3 "Reading Data From Program Memory Using Program Space Visibility"). dsPIC33FJ12GP201/202 devices implement up to 30 Kbytes of data memory. Should an EA point to a location outside of this area, an all-zero word or byte will be returned. All word accesses must be aligned to an even address. Misaligned word data fetches are not supported, so care must be taken when mixing byte and word operations, or translating from 8-bit MCU code. If a misaligned read or write is attempted, an address error trap is generated. If the error occurred on a read, the instruction underway is completed. If the instruction occurred on a write, the instruction is executed but the write does not occur. In either case, a trap is then executed, allowing the system and/or user application to examine the machine state prior to execution of the address Fault. All byte loads into any W register are loaded into the Least Significant Byte. The Most Significant Byte is not modified. A sign-extend instruction (SE) is provided to allow users to translate 8-bit signed data to 16-bit signed values. Alternatively, for 16-bit unsigned data, user applications can clear the MSB of any W register by executing a zero-extend (ZE) instruction on the appropriate address. 3.2.1 DATA SPACE WIDTH The data memory space is organized in byte addressable, 16-bit-wide blocks. Data is aligned in data memory and registers as 16-bit words, but all data space EAs resolve to bytes. The Least Significant Bytes (LSBs) of each word have even addresses, while the Most Significant Bytes (MSBs) have odd addresses. 3.2.3 SFR SPACE The first 2 Kbytes of the near data space, from 0x0000 to 0x07FF, is primarily occupied by Special Function Registers (SFRs). These are used by the dsPIC33FJ12GP201/202 core and peripheral modules for controlling the operation of the device. SFRs are distributed among the modules that they control, and are generally grouped together by module. Much of the SFR space contains unused addresses; these are read as `0'. A complete listing of implemented SFRs, including their addresses, is shown in Table 3-1 through Table 3-21. Note: The actual set of peripheral features and interrupts varies by the device. Refer to the corresponding device tables and pinout diagrams for device-specific information. 3.2.2 DATA MEMORY ORGANIZATION AND ALIGNMENT To maintain backward compatibility with PIC(R) MCU devices and improve data space memory usage efficiency, the dsPIC33FJ12GP201/202 instruction set supports both word and byte operations. As a consequence of byte accessibility, all effective address calculations are internally scaled to step through word-aligned memory. For example, the core recognizes that Post-Modified Register Indirect Addressing mode [Ws++] will result in a value of Ws + 1 for byte operations and Ws + 2 for word operations. Data byte reads will read the complete word that contains the byte, using the LSB of any EA to determine which byte to select. The selected byte is placed onto the LSB of the data path. That is, data memory and registers are organized as two parallel byte-wide entities with shared (word) address decode but separate write lines. Data byte writes only write to the corresponding side of the array or register that matches the byte address. 3.2.4 NEAR DATA SPACE The 8-Kbyte area between 0x0000 and 0x1FFF is referred to as the near data space. Locations in this space are directly addressable via a 13-bit absolute address field within all memory direct instructions. Additionally, the whole data space is addressable using MOV instructions, which support Memory Direct Addressing mode with a 16-bit address field, or by using Indirect Addressing mode using a working register as an address pointer. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 25 dsPIC33FJ12GP201/202 FIGURE 3-3: DATA MEMORY MAP FOR dsPIC33FJ12GP201/202 DEVICES WITH 1 KB RAM MSB Address MSb 2 Kbyte SFR Space 0x0001 SFR Space 0x07FF 0x0801 0x09FF 0x0A01 0x0BFF 0x0C01 0x1FFF 0x2001 X Data RAM (X) Y Data RAM (Y) 0x07FE 0x0800 0x09FE 0x0A00 0x0BFE 0x0C00 0x1FFFF 0x2000 8-Kbyte Near Data Space LSB Address LSb 0x0000 16 bits 1 Kbyte SRAM Space 0x8001 0x8000 Optionally Mapped into Program Memory X Data Unimplemented (X) 0xFFFF 0xFFFE DS70264B-page 26 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 3.2.5 X AND Y DATA SPACES The core has two data spaces, X and Y. These data spaces can be considered either separate (for some DSP instructions), or as one unified linear address range (for MCU instructions). The data spaces are accessed using two Address Generation Units (AGUs) and separate data paths. This feature allows certain instructions to concurrently fetch two words from RAM, thereby enabling efficient execution of DSP algorithms such as Finite Impulse Response (FIR) filtering and Fast Fourier Transform (FFT). The X data space is used by all instructions and supports all addressing modes. X data space has separate read and write data buses. The X read data bus is the read data path for all instructions that view data space as combined X and Y address space. It is also the X data prefetch path for the dual operand DSP instructions (MAC class). The Y data space is used in concert with the X data space by the MAC class of instructions (CLR, ED, EDAC, MAC, MOVSAC, MPY, MPY.N and MSC) to provide two concurrent data read paths. Both the X and Y data spaces support Modulo Addressing mode for all instructions, subject to addressing mode restrictions. Bit-Reversed Addressing mode is only supported for writes to X data space. All data memory writes, including in DSP instructions, view data space as combined X and Y address space. The boundary between the X and Y data spaces is device-dependent and is not user-programmable. All effective addresses are 16 bits wide and point to bytes within the data space. Therefore, the data space address range is 64 Kbytes, or 32K words, though the implemented memory locations vary by device. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 27 DS70264B-page 28 dsPIC33FJ12GP201/202 TABLE 3-1: SFR Name WREG0 WREG1 WREG2 WREG3 WREG4 WREG5 WREG6 WREG7 WREG8 WREG9 WREG10 WREG11 WREG12 WREG13 WREG14 WREG15 SPLIM PCL PCH TBLPAG PSVPAG RCOUNT DCOUNT DOSTARTL DOSTARTH DOENDL DOENDH CPU CORE REGISTERS MAP SFR Addr 0000 0002 0004 0006 0008 000A 000C 000E 0010 0012 0014 0016 0018 001A 001C 001E 0020 002E 0030 0032 0034 0036 0038 003A 003C 003E 0040 0042 0044 0046 0048 004A 004C 004E 0050 0052 BREN -- -- -- OA -- XMODEN -- OB -- YMODEN -- SA -- -- -- SB US -- -- OAB EDT -- SAB -- DA DL<2:0> BWM<3:0> XS<15:1> XE<15:1> YS<15:1> YE<15:1> XB<14:0> Disable Interrupts Counter Register -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All Resets 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0800 xxxx 0000 Program Counter High Byte Register Table Page Address Pointer Register Program Memory Visibility Page Address Pointer Register 0000 0000 0000 xxxx xxxx 0 -- -- IPL2 SATA -- -- IPL1 SATB IPL0 SATDW RA ACCSAT DOSTARTH<5:0> 0 DOENDH N IPL3 OV PSV Z RND C IF 0 1 0 1 xxxx 00xx xxxx 00xx 0000 0000 0000 xxxx xxxx xxxx xxxx xxxx xxxx Working Register 0 Working Register 1 Working Register 2 Working Register 3 Working Register 4 Working Register 5 Working Register 6 Working Register 7 Working Register 8 Working Register 9 Working Register 10 Working Register 11 Working Register 12 Working Register 13 Working Register 14 Working Register 15 Stack Pointer Limit Register Program Counter Low Word Register -- -- -- DCOUNT<15:0> DOSTARTL<15:1> -- DOENDL<15:1> -- DC Preliminary (c) 2007 Microchip Technology Inc. Repeat Loop Counter Register SR CORCON MODCON XMODSRT XMODEND YMODSRT YMODEND XBREV DISICNT Legend: YWM<3:0> XWM<3:0> x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. (c) 2007 Microchip Technology Inc. TABLE 3-2: SFR Name CNEN1 CNEN2 CNPU1 CNPU2 Legend: SFR Addr 0060 0062 0068 006A CHANGE NOTIFICATION REGISTER MAP FOR dsPIC33FJ12GP202 Bit 15 CN15IE -- Bit 14 CN14IE CN30IE Bit 13 CN13IE CN29IE Bit 12 CN12IE -- Bit 11 CN11IE CN27IE Bit 10 ---- -- -- Bit 9 -- -- -- -- Bit 8 -- CN24IE -- Bit 7 CN7IE CN23IE CN7PUE Bit 6 CN6IE CN22IE CN6PUE Bit 5 CN5IE CN21IE CN5PUE Bit 4 CN4IE -- CN4PUE -- Bit 3 CN3IE -- CN3PUE -- Bit 2 CN2IE -- CN2PUE -- Bit 1 CN1IE -- CN1PUE -- Bit 0 CN0IE CN16IE CN0PUE CN16PUE All Resets 0000 0000 0000 0000 CN15PUE CN14PUE CN13PUE CN12PUE CN11PUE -- CN30PUE CN29PUE -- CN27PUE CN24PUE CN23PUE CN22PUE CN21PUE x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. TABLE 3-3: SFR Name CNEN1 CNEN2 CNPU1 SFR Addr 0060 0062 0068 006A CHANGE NOTIFICATION REGISTER MAP FOR dsPIC33FJ12GP201 Bit 15 -- -- -- -- Bit 14 -- CN30IE -- Bit 13 -- CN29IE -- Bit 12 CN12IE -- Bit 11 CN11IE -- Bit 10 -- -- -- -- Bit 9 -- -- -- -- Bit 8 -- -- -- -- Bit 7 -- CN23IE -- Bit 6 -- CN22IE -- Bit 5 CN5IE CN21IE CN5PUE Bit 4 CN4IE -- CN4PUE -- Bit 3 CN3IE -- Bit 2 CN2IE -- Bit 1 CN1IE -- Bit 0 CN0IE -- All Resets 0000 0000 0000 0000 CN12PUE CN11PUE -- -- CN3PUE CN2PUE CN1PUE CN0PUE -- -- -- -- Preliminary DS70264B-page 29 CNPU2 Legend: CN30PUE CN29PUE CN23PUE CN22PUE CN21PUE x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. dsPIC33FJ12GP201/202 DS70264B-page 30 dsPIC33FJ12GP201/202 TABLE 3-4: SFR Name INTCON1 INTCON2 IFS0 IFS1 IFS4 IEC0 IEC1 IEC4 IPC0 IPC1 IPC2 IPC3 IPC4 IPC5 IPC7 IPC16 INTTREG Legend: SFR Addr 0080 0082 0084 0086 008C 0094 0096 009C 00A4 00A6 00A8 00AA 00AC 00AE 00B2 00C4 00E0 INTERRUPT CONTROLLER REGISTER MAP Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 OVBTE -- -- -- -- -- OC1IP<2:0> OC2IP<2:0> SPI1IP<2:0> -- -- -- -- -- -- IC7IP<2:0> -- -- -- -- -- -- Bit 8 COVTE -- T3IF -- -- T3IE -- -- Bit 7 Bit 6 Bit 5 -- -- IC2IF -- -- IC2IE -- -- IC1IP<2:0> IC2IP<2:0> SPI1EIP<2:0> AD1IP<2:0> MI2C1IP<2:0> -- -- INT2IP<2:0> U1EIP<2:0> -- Bit 4 Bit 3 Bit 2 Bit 1 OSCFAIL INT1EP IC1IF MI2C1IF U1EIF IC1IE U1EIE INT0IP<2:0> -- -- T3IP<2:0> U1TXIP<2:0> SI2C1IP<2:0> INT1IP<2:0> -- -- -- -- -- -- -- Bit 0 -- INT0EP INT0IF SI2C1IF -- INT0IE -- All Resets 0000 0000 0000 0000 0000 0000 0000 0000 4444 4444 4444 4444 4444 4444 4444 4444 4444 NSTDIS OVAERR OVBERR COVAERR COVBERR OVATE ALTIVT -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- DISI -- -- -- -- -- -- -- AD1IF INT2IF -- AD1IE INT2IE -- T1IP<2:0> T2IP<2:0> U1RXIP<2:0> -- CNIP<2:0> IC8IP<2:0> -- -- -- -- -- -- -- -- U1TXIF -- -- U1TXIE -- -- -- U1RXIF -- -- U1RXIE -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- SFTACERR DIV0ERR -- T2IF IC8IF -- T2IE IC8IE -- -- -- -- -- -- -- -- -- -- -- OC2IF IC7IF -- OC2IE IC7IE -- MATHERR ADDRERR STKERR -- -- INT1IF -- -- INT1IE -- -- T1IF CNIF -- T1IE CNIE -- -- -- -- -- -- -- -- -- VECNUM<6:0> INT2EP OC1IF -- -- OC1IE -- -- SPI1IF SPI1EIF SPI1IE SPI1EIE MI2C1IE SI2C1IE Preliminary (c) 2007 Microchip Technology Inc. ILR<3:0>> x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. (c) 2007 Microchip Technology Inc. TABLE 3-5: SFR Name TMR1 PR1 T1CON TMR2 TMR3HLD TMR3 PR2 PR3 T2CON T3CON Legend: SFR Addr 0100 0102 0104 0106 0108 010A 010C 010E 0110 0112 TIMER REGISTER MAP Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All Resets xxxx FFFF TGATE TCKPS<1:0> -- TSYNC TCS -- 0000 xxxx xxxx xxxx FFFF FFFF TGATE TGATE TCKPS<1:0> TCKPS<1:0> T32 -- -- -- TCS TCS -- -- 0000 0000 Timer1 Register Period Register 1 TON -- TSIDL -- -- -- -- -- -- Timer2 Register Timer3 Holding Register (for 32-bit timer operations only) Timer3 Register Period Register 2 Period Register 3 TON TON -- -- TSIDL TSIDL -- -- -- -- -- -- -- -- -- -- -- -- x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. TABLE 3-6: SFR Name IC1BUF IC1CON IC2BUF IC2CON IC7BUF IC7CON IC8BUF IC8CON Legend: SFR Addr 0140 0142 0144 0146 0158 015A 015C 015E INPUT CAPTURE REGISTER MAP Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All Resets Preliminary DS70264B-page 31 dsPIC33FJ12GP201/202 Input 1 Capture Register -- -- -- -- -- -- -- -- ICSIDL ICSIDL ICSIDL ICSIDL -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- ICTMR ICTMR ICTMR ICTMR ICI<1:0> ICI<1:0> ICI<1:0> ICI<1:0> ICOV ICOV ICOV ICOV ICBNE ICBNE ICBNE ICBNE ICM<2:0> ICM<2:0> ICM<2:0> ICM<2:0> Input 2 Capture Register Input 7 Capture Register Input 8Capture Register xxxx 0000 xxxx 0000 xxxx 0000 xxxx 0000 x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. TABLE 3-7: SFR Name OC1RS OC1R OC1CON OC2RS OC2R OC2CON Legend: SFR Addr 0180 0182 0184 0186 0188 018A OUTPUT COMPARE REGISTER MAP Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All Resets xxxx xxxx -- -- OCFLT OCTSEL OCM<2:0> 0000 xxxx xxxx -- -- OCFLT OCTSEL OCM<2:0> 0000 Output Compare 1 Secondary Register Output Compare 1 Register -- -- OCSIDL -- -- -- -- -- -- Output Compare 2 Secondary Register Output Compare 2 Register -- -- OCSIDL -- -- -- -- -- -- x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. DS70264B-page 32 dsPIC33FJ12GP201/202 TABLE 3-8: SFR Name I2C1RCV I2C1TRN I2C1BRG I2C1CON I2C1STAT I2C1ADD I2C1MSK Legend: SFR Addr 0200 0202 0204 0206 0208 020A 020C I2C1 REGISTER MAP Bit 15 -- -- -- I2CEN ACKSTAT -- -- Bit 14 -- -- -- -- TRSTAT -- -- Bit 13 -- -- -- I2CSIDL -- -- -- Bit 12 -- -- -- SCLREL -- -- -- Bit 11 -- -- -- IPMIEN -- -- -- Bit 10 -- -- -- A10M BCL -- -- Bit 9 -- -- -- DISSLW GCSTAT SMEN ADD10 GCEN IWCOL STREN I2COV Bit 8 -- -- ACKDT D_A Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All Resets 0000 00FF 0000 PEN R_W RSEN RBF SEN TBF 1000 0000 0000 0000 Receive Register Transmit Register Baud Rate Generator Register ACKEN P RCEN S Address Register Address Mask Register x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. TABLE 3-9: SFR Name U1MODE U1STA U1TXREG U1RXREG U1BRG Legend: SFR Addr 0220 0222 0224 0226 0228 UART1 REGISTER MAP Bit 15 UARTEN UTXISEL1 -- -- Bit 14 -- -- -- Bit 13 USIDL -- -- Bit 12 IREN -- -- -- Bit 11 RTSMD UTXBRK -- -- Bit 10 -- UTXEN -- -- Bit 9 UEN1 UTXBF -- -- Baud Rate Generator Prescaler Bit 8 UEN0 TRMT Bit 7 WAKE Bit 6 LPBACK Bit 5 ABAUD ADDEN Bit 4 URXINV RIDLE Bit 3 BRGH PERR Bit 2 Bit 1 Bit 0 STSEL URXDA All Resets 0000 0110 xxxx 0000 0000 PDSEL<1:0> FERR OERR UTXINV UTXISEL0 URXISEL<1:0> Preliminary (c) 2007 Microchip Technology Inc. UART Transmit Register UART Receive Register x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. TABLE 3-10: SFR Name SPI1STAT SPI1CON1 SPI1CON2 SPI1BUF Legend: SFR Addr 0240 0242 0244 0248 SPI1 REGISTER MAP Bit 15 SPIEN -- FRMEN Bit 14 -- -- SPIFSD Bit 13 SPISIDL -- FRMPOL Bit 12 -- DISSCK -- Bit 11 -- DISSDO -- Bit 10 -- MODE16 -- Bit 9 -- SMP -- Bit 8 -- CKE -- Bit 7 -- SSEN -- Bit 6 SPIROV CKP -- Bit 5 -- MSTEN -- -- Bit 4 -- Bit 3 -- SPRE<2:0> -- -- Bit 2 -- Bit 1 SPITBF FRMDLY Bit 0 SPIRBF -- All Resets 0000 0000 0000 0000 PPRE<1:0> SPI1 Transmit and Receive Buffer Register x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. TABLE 3-11: File Name RPINR0 RPINR1 RPINR3 RPINR7 RPINR10 RPINR11 RPINR18 RPINR20 RPINR21 Legend: Addr 0680 0682 0686 068E 0694 0696 06A4 06A8 06AA PERIPHERAL PIN SELECT INPUT REGISTER MAP Bit 15 -- -- -- -- -- -- -- -- -- Bit 14 -- -- -- -- -- -- -- -- -- Bit 13 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Bit 12 Bit 11 Bit 10 INT1R<4:0> -- T3CKR<4:0> IC2R<4:0> IC8R<4:0> -- U1CTSR<4:0> SCK1R<4:0> -- -- -- -- -- -- -- Bit 9 Bit 8 Bit 7 -- -- -- -- -- -- -- -- -- Bit 6 -- -- -- -- -- -- -- -- -- Bit 5 -- -- -- -- -- -- -- -- -- Bit 4 -- Bit 3 -- Bit 2 -- INT2R<4:0> T2CKR<4:0> IC1R<4:0> IC7R<4:0> OCFAR<4:0> U1RXR<4:0> SDI1R<4:0> SS1R<4:0> Bit 1 -- Bit 0 -- All Resets 1F00 001F 1F1F 1F1F 1F1F 001F 1F1F 1F1F 001F (c) 2007 Microchip Technology Inc. x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. TABLE 3-12: PERIPHERAL PIN SELECT OUTPUT REGISTER MAP FOR dsPIC33FJ12GP202 Bit 15 -- -- -- -- -- -- -- -- Bit 14 -- -- -- -- -- -- -- -- Bit 13 -- -- -- -- -- -- -- -- Bit 12 Bit 11 Bit 10 RP1R<4:0> RP3R<4:0> RP5R<4:0> RP7R<4:0> RP9R<4:0> RP11R<4:0> RP13R<4:0> RP15R<4:0> Bit 9 Bit 8 Bit 7 -- -- -- -- -- -- -- -- Bit 6 -- -- -- -- -- -- -- -- Bit 5 -- -- -- -- -- -- -- -- Bit 4 Bit 3 Bit 2 RP0R<4:0> RP2R<4:0> RP4R<4:0> RP6R<4:0> RP8R<4:0> RP10R<4:0> RP12R<4:0> RP14R<4:0> Bit 1 Bit 0 All Resets Preliminary DS70264B-page 33 File Name RPOR0 RPOR1 RPOR2 RPOR3 RPOR4 RPOR5 RPOR6 RPOR7 Legend: Addr 06C0 06C2 06C4 06C6 06C8 06CA 06CC 06CE dsPIC33FJ12GP201/202 0000 0000 0000 0000 0000 0000 0000 0000 x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. TABLE 3-13: File Name RPOR0 RPOR2 RPOR3 RPOR4 RPOR7 Legend: Addr 06C0 06C4 06C6 06C8 PERIPHERAL PIN SELECT OUTPUT REGISTER MAP FOR dsPIC33FJ12GP201 Bit 15 -- -- -- -- Bit 14 -- -- -- -- Bit 13 -- -- -- -- -- -- Bit 12 Bit 11 Bit 10 RP1R<4:0> -- RP7R<4:0> RP9R<4:0> -- -- Bit 9 Bit 8 Bit 7 -- -- -- -- Bit 6 -- -- -- -- -- Bit 5 -- -- -- -- -- -- -- Bit 4 Bit 3 Bit 2 RP0R<4:0> RP4R<4:0> -- RP8R<4:0> RP14R<4:0> -- -- Bit 1 Bit 0 All Resets 0000 0000 0000 0000 0000 -- -- -- RP15R<4:0> -- 06CE x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. TABLE 3-14: File Name ADC1BUF0 ADC1BUF1 ADC1BUF2 ADC1BUF3 ADC1BUF4 ADC1BUF5 ADC1BUF6 ADC1BUF7 ADC1BUF8 ADC1BUF9 ADC1BUFA ADC1BUFB ADC1BUFC ADC1BUFD ADC1BUFE ADC1BUFE AD1CON1 AD1CON2 AD1CON3 AD1CHS123 AD1CHS0 AD1PCFGL AD1CSSL Legend: Addr 0300 0302 0304 0306 0308 030A 030C 030E 0310 0312 0314 0316 0318 031A 031C 031E 0320 0322 0324 0326 0328 032C 0330 ADC1 REGISTER MAP FOR dsPIC33FJ12GP201 Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All Resets xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx SSRC<2:0> BUFS -- CH123SB -- -- -- CH0NA -- -- -- -- -- -- -- -- -- -- -- -- PCFG5 CSS5 PCFG4 CSS4 PCFG3 CSS3 -- -- SIMSAM ASAM SAMP BUFM CH123NA<1:0> CH0SA<4:0> PCFG2 CSS2 PCFG1 CSS1 PCFG0 CSS0 DONE ALTS CH123SA 0000 0000 0000 0000 0000 0000 0000 SMPI<3:0> ADCS<5:0> -- DS70264B-page 34 dsPIC33FJ12GP201/202 ADC Data Buffer 0 ADC Data Buffer 1 ADC Data Buffer 2 ADC Data Buffer 3 ADC Data Buffer 4 ADC Data Buffer 5 ADC Data Buffer 6 ADC Data Buffer 7 ADC Data Buffer 8 ADC Data Buffer 9 ADC Data Buffer 10 ADC Data Buffer 11 ADC Data Buffer 12 ADC Data Buffer 13 ADC Data Buffer 14 ADC Data Buffer 15 ADON ADRC -- CH0NB -- -- -- VCFG<2:0> -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- ADSIDL -- -- -- -- AD12B CSCNA SAMC<4:0> CH123NB<1:0> CH0SB<4:0> -- -- FORM<1:0> CHPS<1:0> Preliminary (c) 2007 Microchip Technology Inc. x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. (c) 2007 Microchip Technology Inc. TABLE 3-15: File Name ADC1BUF0 ADC1BUF1 ADC1BUF2 ADC1BUF3 ADC1BUF4 ADC1BUF5 ADC1BUF6 ADC1BUF7 ADC1BUF8 ADC1BUF9 ADC1BUFA ADC1BUFB Addr 0300 0302 0304 0306 0308 030A 030C 030E 0310 0312 0314 0316 0318 031A 031C 031E 0320 0322 0324 0326 0328 032C 0330 ADC1 REGISTER MAP FOR dsPIC33FJ12GP202 Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All Resets xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx SSRC<2:0> BUFS -- CH123SB PCFG8 CSS8 -- CH0NA PCFG7 CSS7 CSS9 -- -- -- -- PCFG6 CSS6 -- -- PCFG5 CSS5 PCFG4 CSS4 PCFG3 CSS3 -- -- SIMSAM ASAM SAMP BUFM CH123NA<1:0> CH0SA<4:0> PCFG2 CSS2 PCFG1 CSS1 PCFG0 CSS0 DONE ALTS CH123SA 0000 0000 0000 0000 0000 0000 0000 SMPI<3:0> ADCS<5:0> -- ADC Data Buffer 0 ADC Data Buffer 1 ADC Data Buffer 2 ADC Data Buffer 3 ADC Data Buffer 4 ADC Data Buffer 5 ADC Data Buffer 6 ADC Data Buffer 7 ADC Data Buffer 8 ADC Data Buffer 9 ADC Data Buffer 10 ADC Data Buffer 11 ADC Data Buffer 12 ADC Data Buffer 13 ADC Data Buffer 14 ADC Data Buffer 15 ADON ADRC -- CH0NB -- -- -- VCFG<2:0> -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- ADSIDL -- -- -- -- AD12B CSCNA SAMC<4:0> CH123NB<1:0> CH0SB<4:0> -- -- PCFG9 FORM<1:0> CHPS<1:0> Preliminary DS70264B-page 35 ADC1BUFC ADC1BUFD ADC1BUFE ADC1BUFF AD1CON1 AD1CON2 AD1CON3 AD1CHS123 AD1CHS0 AD1PCFGL AD1CSSL Legend: dsPIC33FJ12GP201/202 x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. DS70264B-page 36 dsPIC33FJ12GP201/202 TABLE 3-16: File Name TRISA PORTA LATA ODCA Legend: Addr 02C0 02C2 02C4 02C6 PORTA REGISTER MAP Bit 15 -- -- -- -- Bit 14 -- -- -- -- Bit 13 -- -- -- -- Bit 12 -- -- -- -- Bit 11 -- -- -- -- Bit 10 -- -- -- -- Bit 9 -- -- -- -- Bit 8 -- -- -- -- Bit 7 -- -- -- -- Bit 6 -- -- -- -- Bit 5 -- -- -- -- Bit 4 TRISA4 RA4 LATA4 ODCA4 Bit 3 TRISA3 RA3 LATA3 ODCA3 Bit 2 TRISA2 RA2 LATA2 ODCA2 Bit 1 TRISA1 RA1 LATA1 ODCA1 Bit 0 TRISA0 RA0 LATA0 ODCA0 All Resets 001F xxxx xxxx xxxx x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. TABLE 3-17: File Name TRISB PORTB LATB ODCB Legend: Addr 02C8 02CA 02CC 02CE PORTB REGISTER MAP FOR dsPIC33FJ12GP202 Bit 15 TRISB15 RB15 LATB15 ODCB15 Bit 14 TRISB14 RB14 LATB14 ODCB14 Bit 13 TRISB13 RB13 LATB13 ODCB13 Bit 12 TRISB12 RB12 LATB12 ODCB12 Bit 11 TRISB11 RB11 LATB11 ODCB11 Bit 10 TRISB10 RB10 LATB10 ODCB10 Bit 9 TRISB9 RB9 LATB9 ODCB9 Bit 8 TRISB8 RB8 LATB8 ODCB8 Bit 7 TRISB7 RB7 LATB7 ODCB7 Bit 6 TRISB6 RB6 LATB6 ODCB6 Bit 5 TRISB5 RB5 LATB5 ODCB5 Bit 4 TRISB4 RB4 LATB4 ODCB4 Bit 3 TRISB3 RB3 LATB3 ODCB3 Bit 2 TRISB2 RB2 LATB2 ODCB2 Bit 1 TRISB1 RB1 LATB1 ODCB1 Bit 0 TRISB0 RB0 LATB0 ODCB0 All Resets FFFF xxxx xxxx xxxx x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. Preliminary (c) 2007 Microchip Technology Inc. TABLE 3-18: File Name TRISB PORTB LATB ODCB Legend: Addr 02C8 02CA 02CC 02CE PORTB REGISTER MAP FOR dsPIC33FJ12GP201 Bit 15 Bit 14 Bit 13 -- -- -- -- Bit 12 -- -- -- -- Bit 11 -- -- -- -- Bit 10 -- -- -- -- Bit 9 TRISB9 RB9 LATB9 ODCB9 Bit 8 TRISB8 RB8 LATB8 ODCB8 Bit 7 TRISB7 RB7 LATB7 ODCB7 Bit 6 -- -- -- -- Bit 5 -- -- -- -- Bit 4 TRISB4 RB4 LATB4 ODCB4 Bit 3 -- -- -- -- Bit 2 -- -- -- -- Bit 1 TRISB1 RB1 LATB1 ODCB1 Bit 0 TRISB0 RB0 LATB0 ODCB0 All Resets C393 xxxx xxxx xxxx TRISB15 TRISB14 RB15 LATB15 ODCB15 RB14 LATB14 ODCB14 x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. TABLE 3-19: File Name RCON OSCCON CLKDIV PLLFBD OSCTUN Legend: Note 1: 2: Addr 0740 0742 0744 0746 0748 SYSTEM CONTROL REGISTER MAP Bit 15 TRAPR -- ROI -- -- -- -- Bit 14 IOPUWR Bit 13 -- COSC<2:0> DOZE<2:0> -- -- -- -- Bit 12 -- Bit 11 -- -- DOZEN -- -- -- -- Bit 10 -- Bit 9 CM NOSC<2:0> FRCDIV<2:0> -- -- -- -- -- Bit 8 VREGS Bit 7 EXTR Bit 6 SWR Bit 5 SWDTEN LOCK -- PLLDIV<8:0> TUN<5:0> Bit 4 WDTO -- Bit 3 SLEEP CF Bit 2 IDLE -- PLLPRE<4:0> Bit 1 BOR LPOSCEN Bit 0 POR OSWEN All Resets xxxx(1) 0300(2) 0040 0030 0000 CLKLOCK IOLOCK PLLPOST<1:0> x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. RCON register Reset values dependent on type of Reset. OSCCON register Reset values dependent on the FOSC Configuration bits and by type of Reset. (c) 2007 Microchip Technology Inc. TABLE 3-20: File Name NVMCON NVMKEY Legend: Note 1: Addr 0760 0766 NVM REGISTER MAP Bit 15 WR -- Bit 14 WREN -- Bit 13 WRERR -- Bit 12 -- -- Bit 11 -- -- Bit 10 -- -- Bit 9 -- -- Bit 8 -- -- Bit 7 -- Bit 6 ERASE Bit 5 -- Bit 4 -- NVMKEY<7:0> Bit 3 Bit 2 Bit 1 Bit 0 All Resets 0000(1) 0000 NVMOP<3:0> x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. Reset value shown is for POR only. Value on other Reset states is dependent on the state of memory write or erase operations at the time of Reset. TABLE 3-21: File Name PMD1 PMD2 Legend: Addr 0770 0772 PMD REGISTER MAP Bit 15 -- IC8MD Bit 14 -- IC7MD Bit 13 T3MD -- Bit 12 T2MD -- Bit 11 T1MD -- Bit 10 -- -- Bit 9 -- IC2MD Bit 8 -- IC1MD Bit 7 I2C1MD -- Bit 6 -- -- Bit 5 U1MD -- Bit 4 -- -- Bit 3 SPI1MD -- Bit 2 -- -- Bit 1 -- OC2MD Bit 0 AD1MD OC1MD All Resets 0000 0000 x = unknown value on Reset, -- = unimplemented, read as `0'. Reset values are shown in hexadecimal. Preliminary DS70264B-page 37 dsPIC33FJ12GP201/202 dsPIC33FJ12GP201/202 3.2.6 SOFTWARE STACK 3.2.7 DATA RAM PROTECTION FEATURE In addition to its use as a working register, the W15 register in the dsPIC33FJ12GP201/202 devices is also used as a software Stack Pointer. The Stack Pointer always points to the first available free word and grows from lower to higher addresses. It pre-decrements for stack pops and post-increments for stack pushes, as shown in Figure 3-4. For a PC push during any CALL instruction, the MSB of the PC is zero-extended before the push, ensuring that the MSB is always clear. Note: A PC push during exception processing concatenates the SRL register to the MSB of the PC prior to the push. The dsPIC33F product family supports Data RAM protection features that enable segments of RAM to be protected when used in conjunction with Boot and Secure Code Segment Security. BSRAM (Secure RAM segment for BS) is accessible only from the Boot Segment Flash code when enabled. SSRAM (Secure RAM segment for RAM) is accessible only from the Secure Segment Flash code when enabled. See Table 3-1 for an overview of the BSRAM and SSRAM SFRs. 3.3 Instruction Addressing Modes The Stack Pointer Limit register (SPLIM) associated with the Stack Pointer sets an upper address boundary for the stack. SPLIM is uninitialized at Reset. As is the case for the Stack Pointer, SPLIM<0> is forced to `0' because all stack operations must be word-aligned. When an EA is generated using W15 as a source or destination pointer, the resulting address is compared with the value in SPLIM. If the contents of the Stack Pointer (W15) and the SPLIM register are equal and a push operation is performed, a stack error trap will not occur. The stack error trap will occur on a subsequent push operation. For example, to cause a stack error trap when the stack grows beyond address 0x2000 in RAM, initialize the SPLIM with the value 0x1FFE. Similarly, a Stack Pointer underflow (stack error) trap is generated when the Stack Pointer address is found to be less than 0x0800. This prevents the stack from interfering with the Special Function Register (SFR) space. A write to the SPLIM register should not be immediately followed by an indirect read operation using W15. The addressing modes shown in Table 3-22 form the basis of the addressing modes optimized to support the specific features of individual instructions. The addressing modes provided in the MAC class of instructions differ from those in the other instruction types. 3.3.1 FILE REGISTER INSTRUCTIONS Most file register instructions use a 13-bit address field (f) to directly address data present in the first 8192 bytes of data memory (near data space). Most file register instructions employ a working register, W0, which is denoted as WREG in these instructions. The destination is typically either the same file register or WREG (with the exception of the MUL instruction), which writes the result to a register or register pair. The MOV instruction allows additional flexibility and can access the entire data space. 3.3.2 MCU INSTRUCTIONS The three-operand MCU instructions are of the form: Operand 3 = Operand 1 FIGURE 3-4: 0x0000 15 CALL STACK FRAME 0 Stack Grows Toward Higher Address PC<15:0> 000000000 PC<22:16> W15 (before CALL) W15 (after CALL) POP : [--W15] PUSH : [W15++] DS70264B-page 38 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 3-22: FUNDAMENTAL ADDRESSING MODES SUPPORTED Description The address of the file register is specified explicitly. The contents of a register are accessed directly. The contents of Wn forms the Effective Address (EA.) The contents of Wn forms the EA. Wn is post-modified (incremented or decremented) by a constant value. Wn is pre-modified (incremented or decremented) by a signed constant value to form the EA. Addressing Mode File Register Direct Register Direct Register Indirect Register Indirect Post-Modified Register Indirect Pre-Modified Register Indirect with Register Offset The sum of Wn and Wb forms the EA. (Register Indexed) Register Indirect with Literal Offset The sum of Wn and a literal forms the EA. The two-source operand prefetch registers must be members of the set {W8, W9, W10, W11}. For data reads, W8 and W9 are always directed to the X RAGU, and W10 and W11 are always directed to the Y AGU. The effective addresses generated (before and after modification) must, therefore, be valid addresses within X data space for W8 and W9 and Y data space for W10 and W11. Note: Register Indirect with Register Offset Addressing mode is available only for W9 (in X space) and W11 (in Y space). 3.3.3 MOVE AND ACCUMULATOR INSTRUCTIONS Move instructions and the DSP accumulator class of instructions provide a greater degree of addressing flexibility than other instructions. In addition to the addressing modes supported by most MCU instructions, move and accumulator instructions also support Register Indirect with Register Offset Addressing mode, also referred to as Register Indexed mode. Note: For the MOV instructions, the addressing mode specified in the instruction can differ for the source and destination EA. However, the 4-bit Wb (Register Offset) field is shared by both source and destination (but typically only used by one). In summary, the following addressing modes are supported by the MAC class of instructions: * * * * * Register Indirect Register Indirect Post-Modified by 2 Register Indirect Post-Modified by 4 Register Indirect Post-Modified by 6 Register Indirect with Register Offset (Indexed) In summary, the following addressing modes are supported by move and accumulator instructions: * * * * * * * * Register Direct Register Indirect Register Indirect Post-modified Register Indirect Pre-modified Register Indirect with Register Offset (Indexed) Register Indirect with Literal Offset 8-bit Literal 16-bit Literal Note: Not all instructions support all the addressing modes given above. Individual instructions may support different subsets of these addressing modes. 3.3.5 OTHER INSTRUCTIONS Besides the addressing modes outlined previously, some instructions use literal constants of various sizes. For example, BRA (branch) instructions use 16-bit signed literals to specify the branch destination directly, whereas the DISI instruction uses a 14-bit unsigned literal field. In some instructions, such as ADD Acc, the source of an operand or result is implied by the opcode itself. Certain operations, such as NOP, do not have any operands. 3.3.4 MAC INSTRUCTIONS The dual source operand DSP instructions (CLR, ED, EDAC, MAC, MPY, MPY.N, MOVSAC and MSC), also referred to as MAC instructions, use a simplified set of addressing modes to allow the user application to effectively manipulate the data pointers through register indirect tables. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 39 dsPIC33FJ12GP201/202 3.4 Modulo Addressing 3.4.1 START AND END ADDRESS Modulo Addressing mode is a method of providing an automated means to support circular data buffers using hardware. The objective is to remove the need for software to perform data address boundary checks when executing tightly looped code, as is typical in many DSP algorithms. Modulo Addressing can operate in either data or program space (since the data pointer mechanism is essentially the same for both). One circular buffer can be supported in each of the X (which also provides the pointers into program space) and Y data spaces. Modulo Addressing can operate on any W register pointer. However, it is not advisable to use W14 or W15 for Modulo Addressing since these two registers are used as the Stack Frame Pointer and Stack Pointer, respectively. In general, any particular circular buffer can be configured to operate in only one direction, as there are certain restrictions on the buffer start address (for incrementing buffers), or end address (for decrementing buffers), based upon the direction of the buffer. The only exception to the usage restrictions is for buffers that have a power-of-two length. As these buffers satisfy the start and end address criteria, they can operate in a bidirectional mode (that is, address boundary checks are performed on both the lower and upper address boundaries). The Modulo Addressing scheme requires that a starting and ending address be specified and loaded into the 16-bit Modulo Buffer Address registers: XMODSRT, XMODEND, YMODSRT and YMODEND (see Table 3-1). Note: Y space Modulo Addressing EA calculations assume word-sized data (LSB of every EA is always clear). The length of a circular buffer is not directly specified. It is determined by the difference between the corresponding start and end addresses. The maximum possible length of the circular buffer is 32K words (64 Kbytes). 3.4.2 W ADDRESS REGISTER SELECTION The Modulo and Bit-Reversed Addressing Control register, MODCON<15:0>, contains enable flags as well as a W register field to specify the W Address registers. The XWM and YWM fields select the registers that will operate with Modulo Addressing: * If XWM = 15, X RAGU and X WAGU Modulo Addressing is disabled. * If YWM = 15, Y AGU Modulo Addressing is disabled. FIGURE 3-5: Byte Address MODULO ADDRESSING OPERATION EXAMPLE MOV MOV MOV MOV MOV MOV MOV MOV #0x1100, W0 W0, XMODSRT #0x1163, W0 W0, MODEND #0x8001, W0 W0, MODCON #0x0000, W0 #0x1110, W1 ;set modulo start address ;set modulo end address ;enable W1, X AGU for modulo ;W0 holds buffer fill value ;point W1 to buffer ;fill the 50 buffer locations ;fill the next location ;increment the fill value 0x1100 DO AGAIN, #0x31 MOV W0, [W1++] AGAIN: INC W0, W0 0x1163 Start Addr = 0x1100 End Addr = 0x1163 Length = 0x0032 words DS70264B-page 40 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 3.4.3 MODULO ADDRESSING APPLICABILITY 3.5.1 BIT-REVERSED ADDRESSING IMPLEMENTATION Modulo Addressing can be applied to the EA calculation associated with any W register. Address boundaries check for addresses equal to: * The upper boundary addresses for incrementing buffers * The lower boundary addresses for decrementing buffers It is important to realize that the address boundaries also check for addresses less than or greater than these addresses. Address changes can, therefore, jump beyond boundaries and still be adjusted correctly. Note: The modulo corrected effective address is written back to the register only when Pre-Modify or Post-Modify Addressing mode is used to compute the effective address. When an address offset (such as [W7+W2]) is used, Modulo Address correction is performed but the contents of the register remain unchanged. Bit-Reversed Addressing mode is enabled in any of these situations: * BWM bits (W register selection) in the MODCON register are any value other than `15' (the stack cannot be accessed using Bit-Reversed Addressing) * The BREN bit is set in the XBREV register * The addressing mode used is Register Indirect with Pre-Increment or Post-Increment If the length of a bit-reversed buffer is M = 2N bytes, the last `N' bits of the data buffer start address must be zeros. XB<14:0> is the Bit-Reversed Address modifier, or `pivot point,' which is typically a constant. In the case of an FFT computation, its value is equal to half of the FFT data buffer size. Note: All bit-reversed EA calculations assume word-sized data (LSB of every EA is always clear). The XB value is scaled accordingly to generate compatible (byte) addresses. 3.5 Bit-Reversed Addressing Bit-Reversed Addressing mode is intended to simplify data re-ordering for radix-2 FFT algorithms. It is supported by the X AGU for data writes only. The modifier, which can be a constant value or register contents, is regarded as having its bit order reversed. The address source and destination are kept in normal order. Thus, the only operand requiring reversal is the modifier. When enabled, Bit-Reversed Addressing is executed only for Register Indirect with Pre-Increment or Post-Increment Addressing and word-sized data writes. It will not function for any other addressing mode or for byte-sized data, and normal addresses are generated instead. When Bit-Reversed Addressing is active, the W Address Pointer is always added to the address modifier (XB), and the offset associated with the Register Indirect Addressing mode is ignored. In addition, as word-sized data is a requirement, the LSb of the EA is ignored (and always clear). Note: Modulo Addressing and Bit-Reversed Addressing should not be enabled together. If an application attempts to do so, Bit-Reversed Addressing will assume priority when active for the X WAGU and X WAGU Modulo Addressing will be disabled. However, Modulo Addressing will continue to function in the X RAGU. If Bit-Reversed Addressing has already been enabled by setting the BREN (XBREV<15>) bit, a write to the XBREV register should not be immediately followed by an indirect read operation using the W register that has been designated as the bit-reversed pointer. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 41 dsPIC33FJ12GP201/202 FIGURE 3-6: BIT-REVERSED ADDRESS EXAMPLE Sequential Address b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 0 Bit Locations Swapped Left-to-Right Around Center of Binary Value b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b1 b2 b3 b4 0 Bit-Reversed Address Pivot Point XB = 0x0008 for a 16-Word Bit-Reversed Buffer TABLE 3-23: A3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 A2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 BIT-REVERSED ADDRESS SEQUENCE (16-ENTRY) Normal Address A1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 A0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Decimal 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 A3 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 A2 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Bit-Reversed Address A1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 A0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Decimal 0 8 4 12 2 10 6 14 1 9 5 13 3 11 7 15 DS70264B-page 42 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 3.6 Interfacing Program and Data Memory Spaces 3.6.1 ADDRESSING PROGRAM SPACE Since the address ranges for the data and program spaces are 16 and 24 bits, respectively, a method is needed to create a 23-bit or 24-bit program address from 16-bit data registers. The solution depends on the interface method to be used. For table operations, the 8-bit Table Page register (TBLPAG) is used to define a 32K word region within the program space. This is concatenated with a 16-bit EA to arrive at a full 24-bit program space address. In this format, the Most Significant bit of TBLPAG is used to determine if the operation occurs in the user memory (TBLPAG<7> = 0) or the configuration memory (TBLPAG<7> = 1). For remapping operations, the 8-bit Program Space Visibility register (PSVPAG) is used to define a 16K word page in the program space. When the Most Significant bit of the EA is `1', PSVPAG is concatenated with the lower 15 bits of the EA to form a 23-bit program space address. Unlike table operations, this limits remapping operations strictly to the user memory area. Table 3-24 and Figure 3-7 show how the program EA is created for table operations and remapping accesses from the data EA. Here, P<23:0> refers to a program space word, and D<15:0> refers to a data space word. The dsPIC33FJ12GP201/202 architecture uses a 24-bit-wide program space and a 16-bit-wide data space. The architecture is also a modified Harvard scheme, meaning that data can also be present in the program space. To use this data successfully, it must be accessed in a way that preserves the alignment of information in both spaces. Aside from normal execution, the dsPIC33FJ12GP201/202 architecture provides two methods by which program space can be accessed during operation: * Using table instructions to access individual bytes or words anywhere in the program space * Remapping a portion of the program space into the data space (Program Space Visibility) Table instructions allow an application to read or write to small areas of the program memory. This capability makes the method ideal for accessing data tables that need to be updated periodically. It also allows access to all bytes of the program word. The remapping method allows an application to access a large block of data on a read-only basis, which is ideal for look ups from a large table of static data. The application can only access the least significant word of the program word. TABLE 3-24: PROGRAM SPACE ADDRESS CONSTRUCTION Access Space User User Configuration Program Space Address <23> 0 0xx xxxx TBLPAG<7:0> 0xxx xxxx TBLPAG<7:0> 1xxx xxxx 0 0 PSVPAG<7:0> xxxx xxxx <22:16> <15> PC<22:1> xxxx xxxx xxxx xxx0 Data EA<15:0> xxxx xxxx xxxx xxxx Data EA<15:0> xxxx xxxx xxxx xxxx Data EA<14:0>(1) xxx xxxx xxxx xxxx <14:1> <0> 0 Access Type Instruction Access (Code Execution) TBLRD/TBLWT (Byte/Word Read/Write) Program Space Visibility (Block Remap/Read) Note 1: User Data EA<15> is always `1' in this case, but is not used in calculating the program space address. Bit 15 of the address is PSVPAG<0>. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 43 dsPIC33FJ12GP201/202 FIGURE 3-7: DATA ACCESS FROM PROGRAM SPACE ADDRESS GENERATION Program Counter(1) 0 Program Counter 23 bits EA 0 1/0 Table Operations(2) 1/0 TBLPAG 8 bits 24 bits 16 bits Select Program Space (Remapping) Visibility(1) 0 PSVPAG 8 bits 1 EA 0 15 bits 23 bits User/Configuration Space Select Byte Select Note 1: The Least Significant bit (LSb) of program space addresses is always fixed as `0' to maintain word alignment of data in the program and data spaces. 2: Table operations are not required to be word-aligned. Table read operations are permitted in the configuration memory space. DS70264B-page 44 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 3.6.2 DATA ACCESS FROM PROGRAM MEMORY USING TABLE INSTRUCTIONS In Byte mode, either the upper or lower byte of the lower program word is mapped to the lower byte of a data address. The upper byte is selected when Byte Select is `1'; the lower byte is selected when it is `0'. * TBLRDH (Table Read High): In Word mode, this instruction maps the entire upper word of a program address (P<23:16>) to a data address. Note that D<15:8>, the `phantom byte', will always be `0'. In Byte mode, this instruction maps the upper or lower byte of the program word to D<7:0> of the data address, as in the TBLRDL instruction. Note that the data will always be `0' when the upper `phantom' byte is selected (Byte Select = 1). In a similar fashion, two table instructions, TBLWTH and TBLWTL, are used to write individual bytes or words to a program space address. The details of their operation are explained in Section 4.0 "Flash Program Memory". For all table operations, the area of program memory space to be accessed is determined by the Table Page register (TBLPAG). TBLPAG covers the entire program memory space of the device, including user and configuration spaces. When TBLPAG<7> = 0, the table page is located in the user memory space. When TBLPAG<7> = 1, the page is located in configuration space. The TBLRDL and TBLWTL instructions offer a direct method of reading or writing the lower word of any address within the program space without going through data space. The TBLRDH and TBLWTH instructions are the only method to read or write the upper 8 bits of a program space word as data. The PC is incremented by two for each successive 24-bit program word. This allows program memory addresses to directly map to data space addresses. Program memory can thus be regarded as two 16-bit-wide word address spaces, residing side by side, each with the same address range. TBLRDL and TBLWTL access the space that contains the least significant data word. TBLRDH and TBLWTH access the space that contains the upper data byte. Two table instructions are provided to move byte or word-sized (16-bit) data to and from program space. Both function as either byte or word operations. * TBLRDL (Table Read Low): In Word mode, this instruction maps the lower word of the program space location (P<15:0>) to a data address (D<15:0>). FIGURE 3-8: TBLPAG ACCESSING PROGRAM MEMORY WITH TABLE INSTRUCTIONS Program Space 23 15 0 02 0x000000 00000000 00000000 00000000 00000000 23 16 8 0 0x020000 0x030000 `Phantom' Byte TBLRDH.B (Wn<0> = 0) TBLRDL.B (Wn<0> = 1) TBLRDL.B (Wn<0> = 0) TBLRDL.W The address for the table operation is determined by the data EA within the page defined by the TBLPAG register. Only read operations are shown; write operations are also valid in the user memory area. 0x800000 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 45 dsPIC33FJ12GP201/202 3.6.3 READING DATA FROM PROGRAM MEMORY USING PROGRAM SPACE VISIBILITY 24-bit program word are used to contain the data. The upper 8 bits of any program space location used as data should be programmed with `1111 1111' or `0000 0000' to force a NOP. This prevents possible issues should the area of code ever be accidentally executed. Note: PSV access is temporarily disabled during table reads/writes. The upper 32 Kbytes of data space may optionally be mapped into any 16K word page of the program space. This option provides transparent access to stored constant data from the data space without the need to use special instructions (such as TBLRDL/H). Program space access through the data space occurs if the Most Significant bit of the data space EA is `1' and program space visibility is enabled by setting the PSV bit in the Core Control register (CORCON<2>). The location of the program memory space to be mapped into the data space is determined by the Program Space Visibility Page register (PSVPAG). This 8-bit register defines any one of 256 possible pages of 16K words in program space. In effect, PSVPAG functions as the upper 8 bits of the program memory address, with the 15 bits of the EA functioning as the lower bits. By incrementing the PC by 2 for each program memory word, the lower 15 bits of data space addresses directly map to the lower 15 bits in the corresponding program space addresses. Data reads to this area add a cycle to the instruction being executed, since two program memory fetches are required. Although each data space address 8000h and higher maps directly into a corresponding program memory address (see Figure 3-9), only the lower 16 bits of the For operations that use PSV and are executed outside a REPEAT loop, the MOV and MOV.D instructions require one instruction cycle in addition to the specified execution time. All other instructions require two instruction cycles in addition to the specified execution time. For operations that use PSV, and are executed inside a REPEAT loop, these instances require two instruction cycles in addition to the specified execution time of the instruction: * Execution in the first iteration * Execution in the last iteration * Execution prior to exiting the loop due to an interrupt * Execution upon re-entering the loop after an interrupt is serviced Any other iteration of the REPEAT loop will allow the instruction using PSV to access data to execute in a single cycle. FIGURE 3-9: PROGRAM SPACE VISIBILITY OPERATION When CORCON<2> = 1 and EA<15> = 1: Program Space PSVPAG 02 23 15 0 0x000000 0x010000 0x018000 The data in the page designated by PSVPAG is mapped into the upper half of the data memory space... Data Space 0x0000 Data EA<14:0> 0x8000 PSV Area ...while the lower 15 bits of the EA specify an exact address within 0xFFFF the PSV area. This corresponds exactly to the same lower 15 bits of the actual program space address. 0x800000 DS70264B-page 46 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 4.0 Note: FLASH PROGRAM MEMORY This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. then program the digital signal controller just before shipping the product. This also allows the most recent firmware or a custom firmware to be programmed. RTSP is accomplished using TBLRD (table read) and TBLWT (table write) instructions. With RTSP, the user application can write program memory data either in blocks or `rows' of 64 instructions (192 bytes) at a time or a single program memory word, and erase program memory in blocks or `pages' of 512 instructions (1536 bytes) at a time. 4.1 The dsPIC33FJ12GP201/202 devices contain internal Flash program memory for storing and executing application code. The memory is readable, writable and erasable during normal operation over the entire VDD range. Flash memory can be programmed in two ways: * In-Circuit Serial ProgrammingTM (ICSPTM) programming capability * Run-Time Self-Programming (RTSP) ICSP allows a dsPIC33FJ12GP201/202 device to be serially programmed while in the end application circuit. This is done with two lines for programming clock and programming data (one of the alternate programming pin pairs: PGC1/PGD1, PGC2/PGD2 or PGC3/PGD3), and three other lines for power (VDD), ground (VSS) and Master Clear (MCLR). This allows customers to manufacture boards with unprogrammed devices and Table Instructions and Flash Programming Regardless of the method used, all programming of Flash memory is done with the table read and table write instructions. These allow direct read and write access to the program memory space from the data memory while the device is in normal operating mode. The 24-bit target address in the program memory is formed using bits <7:0> of the TBLPAG register and the Effective Address (EA) from a W register specified in the table instruction, as shown in Figure 4-1. The TBLRDL and the TBLWTL instructions are used to read or write to bits<15:0> of program memory. TBLRDL and TBLWTL can access program memory in both Word and Byte modes. The TBLRDH and TBLWTH instructions are used to read or write to bits<23:16> of program memory. TBLRDH and TBLWTH can also access program memory in Word or Byte mode. FIGURE 4-1: ADDRESSING FOR TABLE REGISTERS 24 bits Using Program Counter 0 Program Counter 0 Working Reg EA Using Table Instruction 1/0 TBLPAG Reg 8 bits 16 bits User/Configuration Space Select 24-bit EA Byte Select (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 47 dsPIC33FJ12GP201/202 4.2 RTSP Operation 4.3 Control Registers The dsPIC33FJ12GP201/202 Flash program memory array is organized into rows of 64 instructions or 192 bytes. RTSP allows the user application to erase a page of memory, which consists of eight rows (512 instructions) at a time, and to program one row or one word at a time. The 8-row erase pages and single row write rows are edge-aligned from the beginning of program memory, on boundaries of 1536 bytes and 192 bytes, respectively. The program memory implements holding buffers that can contain 64 instructions of programming data. Prior to the actual programming operation, the write data must be loaded into the buffers sequentially. The instruction words loaded must always be from a group of 64 boundary. The basic sequence for RTSP programming is to set up a Table Pointer, then do a series of TBLWT instructions to load the buffers. Programming is performed by setting the control bits in the NVMCON register. A total of 64 TBLWTL and TBLWTH instructions are required to load the instructions. All of the table write operations are single-word writes (two instruction cycles) because only the buffers are written. A programming cycle is required for programming each row. Two SFRs are used to read and write the program Flash memory: * NVMCON: Flash Memory Control Register * NVMKEY: NonVolatile Memory Key Register The NVMCON register (Register 4-1) controls which blocks are to be erased, which memory type is to be programmed and the start of the programming cycle. NVMKEY (Register 4-2) is a write-only register that is used for write protection. To start a programming or erase sequence, the user application must consecutively write 55h and AAh to the NVMKEY register. Refer to Section 4.4 "Programming Operations" for further details. 4.4 Programming Operations A complete programming sequence is necessary for programming or erasing the internal Flash in RTSP mode. A programming operation is nominally 4 ms in duration and the processor stalls (waits) until the operation is finished. Setting the WR bit (NVMCON<15>) starts the operation, and the WR bit is automatically cleared when the operation is finished. DS70264B-page 48 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 4-1: R/SO-0(1) WR bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15 SO = Satiable only bit W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0(1) ERASE U-0 -- U-0 -- R/W-0(1) R/W-0(1) R/W-0(1) NVMCON: FLASH MEMORY CONTROL REGISTER R/W-0(1) WRERR U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 R/W-0(1) bit 0 WREN R/W-0(1) NVMOP<3:0>(2) WR: Write Control bit 1 = Initiates a Flash memory program or erase operation. The operation is self-timed and the bit is cleared by hardware once operation is complete. 0 = Program or erase operation is complete and inactive WREN: Write Enable bit 1 = Enable Flash program/erase operations 0 = Inhibit Flash program/erase operations WRERR: Write Sequence Error Flag bit 1 = An improper program or erase sequence attempt or termination has occurred (bit is set automatically on any set attempt of the WR bit) 0 = The program or erase operation completed normally Unimplemented: Read as `0' ERASE: Erase/Program Enable bit 1 = Perform the erase operation specified by NVMOP<3:0> on the next WR command 0 = Perform the program operation specified by NVMOP<3:0> on the next WR command Unimplemented: Read as `0' NVMOP<3:0>: NVM Operation Select bits(2) If ERASE = 1: 1111 = Memory bulk erase operation 1101 = Erase General Segment 1100 = Erase Secure Segment 0011 = No operation 0010 = Memory page erase operation 0001 = No operation 0000 = Erase a single Configuration register byte If ERASE = 0: 1111 = No operation 1101 = No operation 1100 = No operation 0011 = Memory word program operation 0010 = No operation 0001 = Memory row program operation 0000 = Program a single Configuration register byte bit 14 bit 13 bit 12-7 bit 6 bit 5-4 bit 3-0 Note 1: 2: These bits can only be Reset on POR. All other combinations of NVMOP<3:0> are unimplemented. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 49 dsPIC33FJ12GP201/202 REGISTER 4-2: U-0 -- bit 15 W-0 bit 7 Legend: R = Readable bit -n = Value at POR bit 15-8 bit 7-0 SO = Satiable only bit W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown W-0 W-0 W-0 W-0 W-0 W-0 W-0 bit 0 NVMKEY: NONVOLATILE MEMORY KEY REGISTER U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 NVMKEY<7:0> Unimplemented: Read as `0' NVMKEY<7:0>: Key Register (write-only) bits DS70264B-page 50 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 4.4.1 PROGRAMMING ALGORITHM FOR FLASH PROGRAM MEMORY 4. 5. Programmers can program one row of program Flash memory at a time. To do this, it is necessary to erase the 8-row erase page that contains the desired row. The general process is: 1. 2. 3. Read eight rows of program memory (512 instructions) and store in data RAM. Update the program data in RAM with the desired new data. Erase the block (see Example 4-1): a) Set the NVMOP bits (NVMCON<3:0>) to `0010' to configure for block erase. Set the ERASE (NVMCON<6>) and WREN (NVMCON<14>) bits. b) Write the starting address of the page to be erased into the TBLPAG and W registers. c) Write 55h to NVMKEY. d) Write AAh to NVMKEY. e) Set the WR bit (NVMCON<15>). The erase cycle begins and the CPU stalls for the duration of the erase cycle. When the erase is done, the WR bit is cleared automatically. Write the first 64 instructions from data RAM into the program memory buffers (see Example 4-2). Write the program block to Flash memory: a) Set the NVMOP bits to `0001' to configure for row programming. Clear the ERASE bit and set the WREN bit. b) Write 55h to NVMKEY. c) Write AAh to NVMKEY. d) Set the WR bit. The programming cycle begins and the CPU stalls for the duration of the write cycle. When the write to Flash memory is done, the WR bit is cleared automatically. Repeat steps 4 and 5, using the next available 64 instructions from the block in data RAM by incrementing the value in TBLPAG, until all 512 instructions are written back to Flash memory. 6. For protection against accidental operations, the write initiate sequence for NVMKEY must be used to allow any erase or program operation to proceed. After the programming command has been executed, the user application must wait for the programming time until programming is complete. The two instructions following the start of the programming sequence should be NOPs, as shown in Example 4-3. EXAMPLE 4-1: ERASING A PROGRAM MEMORY PAGE ; ; Initialize NVMCON ; ; ; ; ; ; ; ; ; ; ; ; ; Set up NVMCON for block erase operation MOV #0x4042, W0 MOV W0, NVMCON ; Init pointer to row to be ERASED MOV #tblpage(PROG_ADDR), W0 MOV W0, TBLPAG MOV #tbloffset(PROG_ADDR), W0 TBLWTL W0, [W0] DISI #5 MOV MOV MOV MOV BSET NOP NOP #0x55, W0 W0, NVMKEY #0xAA, W1 W1, NVMKEY NVMCON, #WR Initialize PM Page Boundary SFR Initialize in-page EA[15:0] pointer Set base address of erase block Block all interrupts with priority <7 for next 5 instructions Write the 55 key Write the AA key Start the erase sequence Insert two NOPs after the erase command is asserted (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 51 dsPIC33FJ12GP201/202 EXAMPLE 4-2: LOADING THE WRITE BUFFERS ; Set up NVMCON for row programming operations MOV #0x4001, W0 ; MOV W0, NVMCON ; Initialize NVMCON ; Set up a pointer to the first program memory location to be written ; program memory selected, and writes enabled MOV #0x0000, W0 ; MOV W0, TBLPAG ; Initialize PM Page Boundary SFR MOV #0x6000, W0 ; An example program memory address ; Perform the TBLWT instructions to write the latches ; 0th_program_word MOV #LOW_WORD_0, W2 ; MOV #HIGH_BYTE_0, W3 ; TBLWTL W2, [W0] ; Write PM low word into program latch TBLWTH W3, [W0++] ; Write PM high byte into program latch ; 1st_program_word MOV #LOW_WORD_1, W2 ; MOV #HIGH_BYTE_1, W3 ; TBLWTL W2, [W0] ; Write PM low word into program latch TBLWTH W3, [W0++] ; Write PM high byte into program latch ; 2nd_program_word MOV #LOW_WORD_2, W2 ; MOV #HIGH_BYTE_2, W3 ; ; Write PM low word into program latch TBLWTL W2, [W0] ; Write PM high byte into program latch TBLWTH W3, [W0++] * * * ; 63rd_program_word MOV #LOW_WORD_31, W2 ; MOV #HIGH_BYTE_31, W3 ; ; Write PM low word into program latch TBLWTL W2, [W0] ; Write PM high byte into program latch TBLWTH W3, [W0++] EXAMPLE 4-3: DISI MOV MOV MOV MOV BSET NOP NOP #5 INITIATING A PROGRAMMING SEQUENCE ; Block all interrupts with priority <7 ; for next 5 instructions ; ; ; ; ; ; Write the 55 key Write the AA key Start the erase sequence Insert two NOPs after the erase command is asserted #0x55, W0 W0, NVMKEY #0xAA, W1 W1, NVMKEY NVMCON, #WR DS70264B-page 52 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 5.0 Note: RESETS This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. Any active source of Reset makes the SYSRST signal active. Many registers associated with the CPU and peripherals are forced to a known Reset state. Most registers are unaffected by a Reset; their status is unknown on POR and unchanged by all other Resets. Note: Refer to the specific peripheral or CPU section of this manual for register Reset states. The Reset module combines all Reset sources and controls the device Master Reset Signal, SYSRST. The following is a list of device Reset sources: POR: Power-on Reset BOR: Brown-out Reset MCLR: Master Clear Pin Reset SWR: RESET Instruction WDTO: Watchdog Timer Reset TRAPR: Trap Conflict Reset IOPUWR: Illegal Opcode and Uninitialized W Register Reset and Security Reset * CM: Configuration Mismatch Reset A simplified block diagram of the Reset module is shown in Figure 5-1. * * * * * * * All types of device Reset will set a corresponding status bit in the RCON register to indicate the type of Reset (see Register 5-1). A POR will clear all bits, except for the POR bit (RCON<0>), that are set. The user application can set or clear any bit at any time during code execution. The RCON bits only serve as status bits. Setting a particular Reset status bit in software does not cause a device Reset to occur. The RCON register also has other bits associated with the Watchdog Timer and device power-saving states. The function of these bits is discussed in other sections of this manual. Note: The status bits in the RCON register should be cleared after they are read so that the next RCON register value after a device Reset will be meaningful. FIGURE 5-1: RESET SYSTEM BLOCK DIAGRAM RESET Instruction Glitch Filter MCLR WDT Module Sleep or Idle BOR SYSRST POR VDD Internal Regulator VDD Rise Detect Trap Conflict Illegal Opcode Uninitialized W Register Configuration Mismatch (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 53 dsPIC33FJ12GP201/202 REGISTER 5-1: R/W-0 TRAPR bit 15 R/W-0 EXTR bit 7 Legend: R = Readable bit -n = Value at POR bit 15 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 SWR R/W-0 SWDTEN (2) RCON: RESET CONTROL REGISTER(1) R/W-0 IOPUWR U-0 -- U-0 -- U-0 -- U-0 -- R/W-0 CM R/W-0 VREGS bit 8 R/W-0 WDTO R/W-0 SLEEP R/W-0 IDLE R/W-1 BOR R/W-1 POR bit 0 TRAPR: Trap Reset Flag bit 1 = A Trap Conflict Reset has occurred 0 = A Trap Conflict Reset has not occurred IOPUWR: Illegal Opcode or Uninitialized W Access Reset Flag bit 1 = An illegal opcode detection, an illegal address mode or uninitialized W register used as an Address Pointer caused a Reset 0 = An illegal opcode or uninitialized W Reset has not occurred Unimplemented: Read as `0' CM: Configuration Mismatch Flag bit 1 = A configuration mismatch Reset has occurred. 0 = A configuration mismatch Reset has NOT occurred. VREGS: Voltage Regulator Standby During Sleep bit 1 = Voltage regulator is active during Sleep 0 = Voltage regulator goes into Standby mode during Sleep EXTR: External Reset (MCLR) Pin bit 1 = A Master Clear (pin) Reset has occurred 0 = A Master Clear (pin) Reset has not occurred SWR: Software Reset (Instruction) Flag bit 1 = A RESET instruction has been executed 0 = A RESET instruction has not been executed SWDTEN: Software Enable/Disable of WDT bit(2) 1 = WDT is enabled 0 = WDT is disabled WDTO: Watchdog Timer Time-out Flag bit 1 = WDT time-out has occurred 0 = WDT time-out has not occurred SLEEP: Wake-up from Sleep Flag bit 1 = Device has been in Sleep mode 0 = Device has not been in Sleep mode IDLE: Wake-up from Idle Flag bit 1 = Device was in Idle mode 0 = Device was not in Idle mode All of the Reset status bits can be set or cleared in software. Setting one of these bits in software does not cause a device Reset. If the FWDTEN Configuration bit is `1' (unprogrammed), the WDT is always enabled, regardless of the SWDTEN bit setting. bit 14 bit 13-10 bit 9 bit 8 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 Note 1: 2: DS70264B-page 54 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 5-1: bit 1 RCON: RESET CONTROL REGISTER(1) (CONTINUED) BOR: Brown-out Reset Flag bit 1 = A Brown-out Reset has occurred 0 = A Brown-out Reset has not occurred POR: Power-on Reset Flag bit 1 = A Power-up Reset has occurred 0 = A Power-up Reset has not occurred All of the Reset status bits can be set or cleared in software. Setting one of these bits in software does not cause a device Reset. If the FWDTEN Configuration bit is `1' (unprogrammed), the WDT is always enabled, regardless of the SWDTEN bit setting. bit 0 Note 1: 2: TABLE 5-1: RESET FLAG BIT OPERATION(1) Flag Bit Setting Event Trap conflict event Illegal opcode or uninitialized W register access Configuration mismatch MCLR Reset RESET instruction WDT time-out PWRSAV #SLEEP instruction PWRSAV #IDLE instruction BOR POR Clearing Event POR, BOR POR, BOR POR, BOR POR POR, BOR PWRSAV instruction, POR, BOR, CLRWDT instruction POR, BOR POR, BOR -- -- TRAPR (RCON<15>) IOPUWR (RCON<14>) CM (RCON<9>) EXTR (RCON<7>) SWR (RCON<6>) WDTO (RCON<4>) SLEEP (RCON<3>) IDLE (RCON<2>) BOR (RCON<1>) POR (RCON<0>) Note 1: All Reset flag bits may be set or cleared by the user software. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 55 dsPIC33FJ12GP201/202 5.1 Clock Source Selection at Reset 5.2 Device Reset Times If clock switching is enabled, the system clock source at device Reset is chosen as shown in Table 5-2. If clock switching is disabled, the system clock source is always selected according to the oscillator Configuration bits. Refer to Section 7.0 "Oscillator Configuration" for further details. The Reset times for various types of device Reset are summarized in Table 5-3. The system Reset signal, SYSRST, is released after the POR and PWRT delay times expire. The time at which the device actually begins to execute code also depends on the system oscillator delays, which include the Oscillator Start-up Timer (OST) and the PLL lock time. The OST and PLL lock times occur in parallel with the applicable SYSRST delay times. The FSCM delay determines the time at which the FSCM begins to monitor the system clock source after the SYSRST signal is released. TABLE 5-2: OSCILLATOR SELECTION vs. TYPE OF RESET (CLOCK SWITCHING ENABLED) Clock Source Determinant Oscillator Configuration bits (FNOSC<2:0>) COSC Control bits (OSCCON<14:12>) Reset Type POR BOR MCLR WDTR SWR TABLE 5-3: Reset Type POR RESET DELAY TIMES FOR VARIOUS DEVICE RESETS Clock Source EC, FRC, LPRC ECPLL, FRCPLL XT, HS, SOSC XTPLL, HSPLL SYSRST Delay TPOR + TSTARTUP + TRST TPOR + TSTARTUP + TRST TPOR + TSTARTUP + TRST TPOR + TSTARTUP + TRST TSTARTUP + TRST TSTARTUP + TRST TSTARTUP + TRST TSTARTUP + TRST TRST TRST TRST TRST TRST TRST System Clock Delay -- TLOCK TOST TOST + TLOCK -- TLOCK TOST TOST + TLOCK -- -- -- -- -- -- FSCM Delay -- TFSCM TFSCM TFSCM -- TFSCM TFSCM TFSCM -- -- -- -- -- -- Notes 1, 2, 3 1, 2, 3, 5, 6 1, 2, 3, 4, 6 1, 2, 3, 4, 5, 6 3 3, 5, 6 3, 4, 6 3, 4, 5, 6 3 3 3 3 3 3 BOR EC, FRC, LPRC ECPLL, FRCPLL XT, HS, SOSC XTPLL, HSPLL MCLR WDT Software Illegal Opcode Uninitialized W Trap Conflict Note 1: 2: Any Clock Any Clock Any Clock Any Clock Any Clock Any Clock 3: 4: 5: 6: TPOR = Power-on Reset delay (10 s nominal). TSTARTUP = Conditional POR delay of 20 s nominal (if on-chip regulator is enabled) or 64 ms nominal Power-up Timer delay (if regulator is disabled). TSTARTUP is also applied to all returns from powered-down states, including waking from Sleep mode, only if the regulator is enabled. TRST = Internal state Reset time (20 s nominal). TOST = Oscillator Start-up Timer. A 10-bit counter counts 1024 oscillator periods before releasing the oscillator clock to the system. TLOCK = PLL lock time (20 s nominal). TFSCM = Fail-Safe Clock Monitor delay (100 s nominal). DS70264B-page 56 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 5.2.1 POR AND LONG OSCILLATOR START-UP TIMES 5.2.2.1 FSCM Delay for Crystal and PLL Clock Sources The oscillator start-up circuitry and its associated delay timers are not linked to the device Reset delays that occur at power-up. Some crystal circuits (especially low-frequency crystals) have a relatively long start-up time. Therefore, one or more of the following conditions is possible after SYSRST is released: * The oscillator circuit has not begun to oscillate. * The Oscillator Start-up Timer has not expired (if a crystal oscillator is used). * The PLL has not achieved a lock (if PLL is used). The device will not begin to execute code until a valid clock source has been released to the system. Therefore, the oscillator and PLL start-up delays must be considered when the Reset delay time must be known. When the system clock source is provided by a crystal oscillator and/or the PLL, a short delay, TFSCM, is automatically inserted after the POR and PWRT delay times. The FSCM does not begin to monitor the system clock source until this delay expires. The FSCM delay time is nominally 500 s and provides additional time for the oscillator and/or PLL to stabilize. In most cases, the FSCM delay prevents an oscillator failure trap at a device Reset when the PWRT is disabled. 5.3 Special Function Register Reset States 5.2.2 FAIL-SAFE CLOCK MONITOR (FSCM) AND DEVICE RESETS If the FSCM is enabled, it begins to monitor the system clock source when SYSRST is released. If a valid clock source is not available at this time, the device automatically switches to the FRC oscillator and the user application can switch to the desired crystal oscillator in the Trap Service Routine (TSR). Most of the Special Function Registers (SFRs) associated with the CPU and peripherals are reset to a particular value at a device Reset. The SFRs are grouped by their peripheral or CPU function, and their Reset values are specified in each section of this manual. The Reset value for each SFR does not depend on the type of Reset, with the exception of two registers: * The Reset value for the Reset Control register, RCON, depends on the type of device Reset. * The Reset value for the Oscillator Control register, OSCCON, depends on the type of Reset and the programmed values of the Oscillator Configuration bits in the FOSC Configuration register. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 57 dsPIC33FJ12GP201/202 NOTES: DS70264B-page 58 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 6.0 Note: INTERRUPT CONTROLLER This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. 6.1.1 ALTERNATE INTERRUPT VECTOR TABLE The Alternate Interrupt Vector Table (AIVT) is located after the IVT, as shown in Figure 6-1. Access to the AIVT is provided by the ALTIVT control bit (INTCON2<15>). If the ALTIVT bit is set, all interrupt and exception processes use the alternate vectors instead of the default vectors. The alternate vectors are organized in the same manner as the default vectors. The AIVT supports debugging by providing a means to switch between an application and a support environment without requiring the interrupt vectors to be reprogrammed. This feature also enables switching between applications for evaluation of different software algorithms at run time. If the AIVT is not needed, the AIVT should be programmed with the same addresses used in the IVT. The dsPIC33FJ12GP201/202 interrupt controller reduces the numerous peripheral interrupt request signals to a single interrupt request signal to the dsPIC33FJ12GP201/202 CPU. It has the following features: Up to 8 processor exceptions and software traps 7 user-selectable priority levels Interrupt Vector Table (IVT) with up to 118 vectors A unique vector for each interrupt or exception source * Fixed priority within a specified user priority level * Alternate Interrupt Vector Table (AIVT) for debug support * Fixed interrupt entry and return latencies * * * * 6.2 Reset Sequence 6.1 Interrupt Vector Table A device Reset is not a true exception because the interrupt controller is not involved in the Reset process. The dsPIC33FJ12GP201/202 device clears its registers in response to a Reset, which forces the PC to zero. The digital signal controller then begins program execution at location 0x000000. The user application can use a GOTO instruction at the Reset address which redirects program execution to the appropriate start-up routine. Note: Any unimplemented or unused vector locations in the IVT and AIVT should be programmed with the address of a default interrupt handler routine that contains a RESET instruction. The Interrupt Vector Table is shown in Figure 6-1. The IVT resides in program memory, starting at location 000004h. The IVT contains 126 vectors consisting of 8 nonmaskable trap vectors plus up to 118 sources of interrupt. In general, each interrupt source has its own vector. Each interrupt vector contains a 24-bit wide address. The value programmed into each interrupt vector location is the starting address of the associated Interrupt Service Routine (ISR). Interrupt vectors are prioritized in terms of their natural priority; this priority is linked to their position in the vector table. Lower addresses generally have a higher natural priority. For example, the interrupt associated with vector 0 will take priority over interrupts at any other vector address. dsPIC33FJ12GP201/202 devices implement up to 21 unique interrupts and 4 nonmaskable traps. These are summarized in Table 6-1 and Table 6-2. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 59 dsPIC33FJ12GP201/202 FIGURE 6-1: dsPIC33FJ12GP201/202 INTERRUPT VECTOR TABLE Reset - GOTO Instruction Reset - GOTO Address Reserved Oscillator Fail Trap Vector Address Error Trap Vector Stack Error Trap Vector Math Error Trap Vector Reserved Reserved Reserved Interrupt Vector 0 Interrupt Vector 1 ~ ~ ~ Interrupt Vector 52 Interrupt Vector 53 Interrupt Vector 54 ~ ~ ~ Interrupt Vector 116 Interrupt Vector 117 Reserved Reserved Reserved Oscillator Fail Trap Vector Address Error Trap Vector Stack Error Trap Vector Math Error Trap Vector Reserved Reserved Reserved Interrupt Vector 0 Interrupt Vector 1 ~ ~ ~ Interrupt Vector 52 Interrupt Vector 53 Interrupt Vector 54 ~ ~ ~ Interrupt Vector 116 Interrupt Vector 117 Start of Code 0x000000 0x000002 0x000004 0x000014 Decreasing Natural Order Priority 0x00007C 0x00007E 0x000080 Interrupt Vector Table (IVT)(1) 0x0000FC 0x0000FE 0x000100 0x000102 0x000114 Alternate Interrupt Vector Table (AIVT)(1) 0x00017C 0x00017E 0x000180 0x0001FE 0x000200 Note 1: See Table 6-1 for the list of implemented interrupt vectors. DS70264B-page 60 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 6-1: Vector Number 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 INTERRUPT VECTORS Interrupt Request (IRQ) Number 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 IVT Address 0x000014 0x000016 0x000018 0x00001A 0x00001C 0x00001E 0x000020 0x000022 0x000024 0x000026 0x000028 0x00002A 0x00002C 0x00002E 0x000030 0x000032 0x000034 0x000036 0x000038 0x00003A 0x00003C 0x00003E 0x000040 0x000042 0x000044 0x000046 0x000048 0x00004A 0x00004C 0x00004E 0x000050 0x000052 0x000054 0x000056 0x000058 0x00005A 0x00005C 0x00005E 0x000060 0x000062 0x000064 0x000066 0x000068 0x00006A 0x00006C 0x00006E AIVT Address 0x000114 0x000116 0x000118 0x00011A 0x00011C 0x00011E 0x000120 0x000122 0x000124 0x000126 0x000128 0x00012A 0x00012C 0x00012E 0x000130 0x000132 0x000134 0x000136 0x000138 0x00013A 0x00013C 0x00013E 0x000140 0x000142 0x000144 0x000146 0x000148 0x00014A 0x00014C 0x00014E 0x000150 0x000152 0x000154 0x000156 0x000158 0x00015A 0x00015C 0x00015E 0x000160 0x000162 0x000164 0x000166 0x000168 0x00016A 0x00016C 0x00016E Interrupt Source INT0 - External Interrupt 0 IC1 - Input Compare 1 OC1 - Output Compare 1 T1 - Timer1 Reserved IC2 - Input Capture 2 OC2 - Output Compare 2 T2 - Timer2 T3 - Timer3 SPI1E - SPI1 Error SPI1 - SPI1 Transfer Done U1RX - UART1 Receiver U1TX - UART1 Transmitter ADC1 - ADC 1 Reserved Reserved SI2C1 - I2C1 Slave Events MI2C1 - I2C1 Master Events Reserved Change Notification Interrupt INT1 - External Interrupt 1 Reserved IC7 - Input Capture 7 IC8 - Input Capture 8 Reserved Reserved Reserved Reserved Reserved INT2 - External Interrupt 2 Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 61 dsPIC33FJ12GP201/202 TABLE 6-1: Vector Number 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80-125 INTERRUPT VECTORS (CONTINUED) Interrupt Request (IRQ) Number 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72-117 IVT Address 0x000070 0x000072 0x000074 0x000076 0x000078 0x00007A 0x00007C 0x00007E 0x000080 0x000082 0x000084 0x000086 0x000088 0x00008A 0x00008C 0x00008E 0x000090 0x000092 0x000094 0x000096 0x000098 0x00009A 0x00009C 0x00009E 0x0000A0 0x0000A2 0x0000A40x0000FE AIVT Address 0x000170 0x000172 0x000174 0x000176 0x000178 0x00017A 0x00017C 0x00017E 0x000180 0x000182 0x000184 0x000186 0x000188 0x00018A 0x00018C 0x00018E 0x000190 0x000192 0x000194 0x000196 0x000198 0x00019A 0x00019C 0x00019E 0x0001A0 0x0001A2 0x0001A40x0001FE Interrupt Source Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved U1E - UART1 Error Reserved Reserved Reserved Reserved Reserved Reserved Reserved TABLE 6-2: 0 1 2 3 4 5 6 7 TRAP VECTORS IVT Address 0x000004 0x000006 0x000008 0x00000A 0x00000C 0x00000E 0x000010 0x000012 AIVT Address 0x000104 0x000106 0x000108 0x00010A 0x00010C 0x00010E 0x000110 0x000112 Trap Source Reserved Oscillator Failure Address Error Stack Error Math Error Reserved Reserved Reserved Vector Number DS70264B-page 62 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 6.3 Interrupt Control and Status Registers 6.3.4 IPCx The IPC registers are used to set the interrupt priority level for each source of interrupt. Each user interrupt source can be assigned to one of eight priority levels. dsPIC33FJ12GP201/202 devices implement a total of 17 registers for the interrupt controller: * * * * * * Interrupt Control Register 1 (INTCON1) Interrupt Control Register 2 (INTCON2) Interrupt Flag Status Registers (IFSx) Interrupt Enable Control Registers (IECx) Interrupt Priority Control Registers (IPCx) Interrupt Control and Status Register (INTTREG) 6.3.5 INTTREG The INTTREG register contains the associated interrupt vector number and the new CPU interrupt priority level, which are latched into vector number (VECNUM<6:0>) and Interrupt level (ILR<3:0>) bit fields in the INTTREG register. The new interrupt priority level is the priority of the pending interrupt. The interrupt sources are assigned to the IFSx, IECx and IPCx registers in the same sequence that they are listed in Table 6-1. For example, the INT0 (External Interrupt 0) is shown as having vector number 8 and a natural order priority of 0. Thus, the INT0IF bit is found in IFS0<0>, the INT0IE bit in IEC0<0>, and the INT0IP bits in the first position of IPC0 (IPC0<2:0>). 6.3.1 INTCON1 AND INTCON2 Global interrupt control functions are controlled from INTCON1 and INTCON2. INTCON1 contains the Interrupt Nesting Disable (NSTDIS) bit as well as the control and status flags for the processor trap sources. The INTCON2 register controls the external interrupt request signal behavior and the use of the Alternate Interrupt Vector Table. 6.3.6 STATUS REGISTERS 6.3.2 IFSx The IFS registers maintain all of the interrupt request flags. Each source of interrupt has a status bit, which is set by the respective peripherals or external signal and is cleared via software. Although they are not specifically part of the interrupt control hardware, two of the CPU Control registers contain bits that control interrupt functionality: * The CPU STATUS register, SR, contains the IPL<2:0> bits (SR<7:5>). These bits indicate the current CPU interrupt priority level. The user can change the current CPU priority level by writing to the IPL bits. * The CORCON register contains the IPL3 bit which, together with IPL<2:0>, also indicates the current CPU priority level. IPL3 is a read-only bit, so that trap events cannot be masked by the user software. All Interrupt registers are described in Register 6-1 through Register 6-19 in the following pages. 6.3.3 IECx The IEC registers maintain all of the interrupt enable bits. These control bits are used to individually enable interrupts from the peripherals or external signals. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 63 dsPIC33FJ12GP201/202 REGISTER 6-1: R-0 OA bit 15 R/W-0(3) IPL2(2) bit 7 Legend: C = Clear only bit S = Set only bit `1' = Bit is set bit 7-5 R = Readable bit W = Writable bit `0' = Bit is cleared U = Unimplemented bit, read as `0' -n = Value at POR x = Bit is unknown R/W-0(3) IPL1 (2) SR: CPU STATUS REGISTER(1) R-0 OB R/C-0 SA R/C-0 SB R-0 OAB R/C-0 SAB R -0 DA R/W-0 DC bit 8 R/W-0(3) IPL0 (2) R-0 RA R/W-0 N R/W-0 OV R/W-0 Z R/W-0 C bit 0 IPL<2:0>: CPU Interrupt Priority Level Status bits(1) 111 = CPU Interrupt Priority Level is 7 (15), user interrupts disabled 110 = CPU Interrupt Priority Level is 6 (14) 101 = CPU Interrupt Priority Level is 5 (13) 100 = CPU Interrupt Priority Level is 4 (12) 011 = CPU Interrupt Priority Level is 3 (11) 010 = CPU Interrupt Priority Level is 2 (10) 001 = CPU Interrupt Priority Level is 1 (9) 000 = CPU Interrupt Priority Level is 0 (8) For complete register details, see Register 2-1: "SR: CPU Status Register". The IPL<2:0> bits are concatenated with the IPL<3> bit (CORCON<3>) to form the CPU Interrupt Priority Level. The value in parentheses indicates the IPL if IPL<3> = 1. User interrupts are disabled when IPL<3> = 1. The IPL<2:0> Status bits are read-only when NSTDIS (INTCON1<15>) = 1. Note 1: 2: 3: REGISTER 6-2: U-0 -- bit 15 R/W-0 SATA bit 7 Legend: R = Readable bit 0' = Bit is cleared bit 3 CORCON: CORE CONTROL REGISTER(1) U-0 -- U-0 -- R/W-0 US R/W-0 EDT R-0 R-0 DL<2:0> R-0 bit 8 R/W-0 SATB R/W-1 SATDW R/W-0 ACCSAT R/C-0 IPL3(2) R/W-0 PSV R/W-0 RND R/W-0 IF bit 0 C = Clear only bit W = Writable bit `x = Bit is unknown -n = Value at POR `1' = Bit is set U = Unimplemented bit, read as `0' IPL3: CPU Interrupt Priority Level Status bit 3(2) 1 = CPU interrupt priority level is greater than 7 0 = CPU interrupt priority level is 7 or less For complete register details, see Register 2-2: "CORCON: CORE Control Register". The IPL3 bit is concatenated with the IPL<2:0> bits (SR<7:5>) to form the CPU Interrupt Priority Level. Note 1: 2: DS70264B-page 64 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 6-3: R/W-0 NSTDIS bit 15 R/W-0 SFTACERR bit 7 Legend: R = Readable bit -n = Value at POR bit 15 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 DIV0ERR U-0 -- R/W-0 MATHERR R/W-0 ADDRERR R/W-0 STKERR R/W-0 OSCFAIL U-0 -- bit 0 INTCON1: INTERRUPT CONTROL REGISTER 1 R/W-0 OVAERR R/W-0 OVBERR R/W-0 COVAERR R/W-0 COVBERR R/W-0 OVATE R/W-0 OVBTE R/W-0 COVTE bit 8 NSTDIS: Interrupt Nesting Disable bit 1 = Interrupt nesting is disabled 0 = Interrupt nesting is enabled OVAERR: Accumulator A Overflow Trap Flag bit 1 = Trap was caused by overflow of Accumulator A 0 = Trap was not caused by overflow of Accumulator A OVBERR: Accumulator B Overflow Trap Flag bit 1 = Trap was caused by overflow of Accumulator B 0 = Trap was not caused by overflow of Accumulator B COVAERR: Accumulator A Catastrophic Overflow Trap Enable bit 1 = Trap was caused by catastrophic overflow of Accumulator A 0 = Trap was not caused by catastrophic overflow of Accumulator A COVBERR: Accumulator B Catastrophic Overflow Trap Enable bit 1 = Trap was caused by catastrophic overflow of Accumulator B 0 = Trap was not caused by catastrophic overflow of Accumulator B OVATE: Accumulator A Overflow Trap Enable bit 1 = Trap overflow of Accumulator A 0 = Trap disabled OVBTE: Accumulator B Overflow Trap Enable bit 1 = Trap overflow of Accumulator B 0 = Trap disabled COVTE: Catastrophic Overflow Trap Enable bit 1 = Trap on catastrophic overflow of Accumulator A or B enabled 0 = Trap disabled SFTACERR: Shift Accumulator Error Status bit 1 = Math error trap was caused by an invalid accumulator shift 0 = Math error trap was not caused by an invalid accumulator shift DIV0ERR: Arithmetic Error Status bit 1 = Math error trap was caused by a divide by zero 0 = Math error trap was not caused by a divide by zero Unimplemented: Read as `0' MATHERR: Arithmetic Error Status bit 1 = Math error trap has occurred 0 = Math error trap has not occurred ADDRERR: Address Error Trap Status bit 1 = Address error trap has occurred 0 = Address error trap has not occurred bit 14 bit 13 bit 12 bit 11 bit 10 bit 9 bit 8 bit 7 bit 6 bit 5 bit 4 bit 3 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 65 dsPIC33FJ12GP201/202 REGISTER 6-3: bit 2 INTCON1: INTERRUPT CONTROL REGISTER 1 (CONTINUED) STKERR: Stack Error Trap Status bit 1 = Stack error trap has occurred 0 = Stack error trap has not occurred OSCFAIL: Oscillator Failure Trap Status bit 1 = Oscillator failure trap has occurred 0 = Oscillator failure trap has not occurred Unimplemented: Read as `0' bit 1 bit 0 DS70264B-page 66 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 6-4: R/W-0 ALTIVT bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- U-0 -- U-0 -- R/W-0 INT2EP R/W-0 INT1EP INTCON2: INTERRUPT CONTROL REGISTER 2 R-0 DISI U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 R/W-0 INT0EP bit 0 ALTIVT: Enable Alternate Interrupt Vector Table bit 1 = Use alternate vector table 0 = Use standard (default) vector table DISI: DISI Instruction Status bit 1 = DISI instruction is active 0 = DISI instruction is not active Unimplemented: Read as `0' INT2EP: External Interrupt 2 Edge Detect Polarity Select bit 1 = Interrupt on negative edge 0 = Interrupt on positive edge INT1EP: External Interrupt 1 Edge Detect Polarity Select bit 1 = Interrupt on negative edge 0 = Interrupt on positive edge INT0EP: External Interrupt 0 Edge Detect Polarity Select bit 1 = Interrupt on negative edge 0 = Interrupt on positive edge bit 14 bit 13-3 bit 2 bit 1 bit 0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 67 dsPIC33FJ12GP201/202 REGISTER 6-5: U-0 -- bit 15 R/W-0 T2IF bit 7 Legend: R = Readable bit -n = Value at POR bit 15-14 bit 13 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 OC2IF R/W-0 IC2IF U-0 -- R/W-0 T1IF R/W-0 OC1IF R/W-0 IC1IF IFS0: INTERRUPT FLAG STATUS REGISTER 0 U-0 -- R/W-0 AD1IF R/W-0 U1TXIF R/W-0 U1RXIF R/W-0 SPI1IF R/W-0 SPI1EIF R/W-0 T3IF bit 8 R/W-0 INT0IF bit 0 Unimplemented: Read as `0' AD1IF: ADC1 Conversion Complete Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred U1TXIF: UART1 Transmitter Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred U1RXIF: UART1 Receiver Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred SPI1IF: SPI1 Event Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred SPI1EIF: SPI1 Fault Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred T3IF: Timer3 Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred T2IF: Timer2 Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred OC2IF: Output Compare Channel 2 Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred IC2IF: Input Capture Channel 2 Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred Unimplemented: Read as `0' T1IF: Timer1 Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred OC1IF: Output Compare Channel 1 Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred bit 12 bit 11 bit 10 bit 9 bit 8 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 DS70264B-page 68 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 6-5: bit 1 IFS0: INTERRUPT FLAG STATUS REGISTER 0 (CONTINUED) IC1IF: Input Capture Channel 1 Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred INT0IF: External Interrupt 0 Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred bit 0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 69 dsPIC33FJ12GP201/202 REGISTER 6-6: U-0 -- bit 15 R/W-0 IC8IF bit 7 Legend: R = Readable bit -n = Value at POR bit 15-14 bit 13 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 IC7IF U-0 -- R/W-0 INT1IF R/W-0 CNIF U-0 -- R/W-0 MI2C1IF IFS1: INTERRUPT FLAG STATUS REGISTER 1 U-0 -- R/W-0 INT2IF U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 R/W-0 SI2C1IF bit 0 Unimplemented: Read as `0' INT2IF: External Interrupt 2 Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred Unimplemented: Read as `0' IC8IF: Input Capture Channel 8 Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred IC7IF: Input Capture Channel 7 Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred Unimplemented: Read as `0' INT1IF: External Interrupt 1 Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred CNIF: Input Change Notification Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred Unimplemented: Read as `0' MI2C1IF: I2C1 Master Events Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred SI2C1IF: I2C1 Slave Events Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred bit 12-8 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 DS70264B-page 70 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 6-7: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-2 bit 1 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 U1EIF U-0 -- bit 0 IFS4: INTERRUPT FLAG STATUS REGISTER 4 U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 Unimplemented: Read as `0' U1EIF: UART1 Error Interrupt Flag Status bit 1 = Interrupt request has occurred 0 = Interrupt request has not occurred Unimplemented: Read as `0' bit 0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 71 dsPIC33FJ12GP201/202 REGISTER 6-8: U-0 -- bit 15 R/W-0 T2IE bit 7 Legend: R = Readable bit -n = Value at POR bit 15-14 bit 13 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 OC2IE R/W-0 IC2IE U-0 -- R/W-0 T1IE R/W-0 OC1IE R/W-0 IC1IE IEC0: INTERRUPT ENABLE CONTROL REGISTER 0 U-0 -- R/W-0 AD1IE R/W-0 U1TXIE R/W-0 U1RXIE R/W-0 SPI1IE R/W-0 SPI1EIE R/W-0 T3IE bit 8 R/W-0 INT0IE bit 0 Unimplemented: Read as `0' AD1IE: ADC1 Conversion Complete Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled U1TXIE: UART1 Transmitter Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled U1RXIE: UART1 Receiver Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled SPI1IE: SPI1 Event Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled SPI1EIE: SPI1 Error Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled T3IE: Timer3 Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled T2IE: Timer2 Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled OC2IE: Output Compare Channel 2 Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled IC2IE: Input Capture Channel 2 Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled Unimplemented: Read as `0' T1IE: Timer1 Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled OC1IE: Output Compare Channel 1 Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled bit 12 bit 11 bit 10 bit 9 bit 8 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 DS70264B-page 72 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 6-8: bit 1 IEC0: INTERRUPT ENABLE CONTROL REGISTER 0 (CONTINUED) IC1IE: Input Capture Channel 1 Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled INT0IE: External Interrupt 0 Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled bit 0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 73 dsPIC33FJ12GP201/202 REGISTER 6-9: U-0 -- bit 15 R/W-0 IC8IE bit 7 Legend: R = Readable bit -n = Value at POR bit 15-14 bit 13 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 IC7IE U-0 -- R/W-0 INT1IE R/W-0 CNIE U-0 -- R/W-0 MI2C1IE IEC1: INTERRUPT ENABLE CONTROL REGISTER 0 U-0 -- R/W-0 INT2IE U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 R/W-0 SI2C1IE bit 0 Unimplemented: Read as `0' INT2IE: External Interrupt 2 Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled Unimplemented: Read as `0' IC8IE: Input Capture Channel 8 Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled IC7IE: Input Capture Channel 7 Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled Unimplemented: Read as `0' INT1IE: External Interrupt 1 Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled CNIE: Input Change Notification Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled Unimplemented: Read as `0' MI2C1IE: I2C1 Master Events Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled SI2C1IE: I2C1 Slave Events Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled bit 12-8 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 DS70264B-page 74 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 6-10: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-2 bit 1 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- R/W-0 U1EIE U-0 -- bit 0 IEC4: INTERRUPT ENABLE CONTROL REGISTER 0 U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 Unimplemented: Read as `0' U1EIE: UART1 Error Interrupt Enable bit 1 = Interrupt request enabled 0 = Interrupt request not enabled Unimplemented: Read as `0' bit 0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 75 dsPIC33FJ12GP201/202 REGISTER 6-11: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15 bit 14-12 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-1 R/W-0 IC1IP<2:0> R/W-0 U-0 -- R/W-1 R/W-0 INT0IP<2:0> bit 0 IPC0: INTERRUPT PRIORITY CONTROL REGISTER 0 R/W-1 R/W-0 T1IP<2:0> R/W-0 U-0 -- R/W-1 R/W-0 OC1IP<2:0> bit 8 R/W-0 R/W-0 Unimplemented: Read as `0' T1IP<2:0>: Timer1 Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' OC1IP<2:0>: Output Compare Channel 1 Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' IC1IP<2:0>: Input Capture Channel 1 Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' INT0IP<2:0>: External Interrupt 0 Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled bit 11 bit 10-8 bit 7 bit 6-4 bit 3 bit 2-0 DS70264B-page 76 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 6-12: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15 bit 14-12 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-1 R/W-0 IC2IP<2:0> R/W-0 U-0 -- U-0 -- U-0 -- U-0 -- bit 0 IPC1: INTERRUPT PRIORITY CONTROL REGISTER 1 R/W-1 R/W-0 T2IP<2:0> R/W-0 U-0 -- R/W-1 R/W-0 OC2IP<2:0> bit 8 R/W-0 Unimplemented: Read as `0' T2IP<2:0>: Timer2 Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' OC2IP<2:0>: Output Compare Channel 2 Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' IC2IP<2:0>: Input Capture Channel 2 Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' bit 11 bit 10-8 bit 7 bit 6-4 bit 3-0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 77 dsPIC33FJ12GP201/202 REGISTER 6-13: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15 bit 14-12 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-1 R/W-0 SPI1EIP<2:0> R/W-0 U-0 -- R/W-1 R/W-0 T3IP<2:0> bit 0 IPC2: INTERRUPT PRIORITY CONTROL REGISTER 2 R/W-1 R/W-0 U1RXIP<2:0> R/W-0 U-0 -- R/W-1 R/W-0 SPI1IP<2:0> bit 8 R/W-0 R/W-0 Unimplemented: Read as `0' U1RXIP<2:0>: UART1 Receiver Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' SPI1IP<2:0>: SPI1 Event Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' SPI1EIP<2:0>: SPI1 Error Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' T3IP<2:0>: Timer3 Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled bit 11 bit 10-8 bit 7 bit 6-4 bit 3 bit 2-0 DS70264B-page 78 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 6-14: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-7 bit 6-4 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-1 R/W-0 AD1IP<2:0> R/W-0 U-0 -- R/W-1 R/W-0 U1TXIP<2:0> bit 0 IPC3: INTERRUPT PRIORITY CONTROL REGISTER 3 U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 R/W-0 Unimplemented: Read as `0' AD1IP<2:0>: ADC1 Conversion Complete Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' U1TXIP<2:0>: UART1 Transmitter Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled bit 3 bit 2-0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 79 dsPIC33FJ12GP201/202 REGISTER 6-15: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15 bit 14-12 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-1 R/W-0 MI2C1IP<2:0> R/W-0 U-0 -- R/W-1 R/W-0 SI2C1IP<2:0> bit 0 IPC4: INTERRUPT PRIORITY CONTROL REGISTER 4 R/W-1 R/W-0 CNIP<2:0> R/W-0 U-0 -- U-0 -- U-0 -- U-0 -- bit 8 R/W-0 Unimplemented: Read as `0' CNIP<2:0>: Change Notification Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' MI2C1IP<2:0>: I2C1 Master Events Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' SI2C1IP<2:0>: I2C1 Slave Events Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled bit 11-7 bit 6-4 bit 3 bit 2-0 DS70264B-page 80 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 6-16: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15 bit 14-12 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- U-0 -- U-0 -- R/W-1 R/W-0 INT1IP<2:0> bit 0 IPC5: INTERRUPT PRIORITY CONTROL REGISTER 5 R/W-1 R/W-0 IC8IP<2:0> R/W-0 U-0 -- R/W-1 R/W-0 IC7IP<2:0> bit 8 R/W-0 R/W-0 Unimplemented: Read as `0' IC8IP<2:0>: Input Capture Channel 8 Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' IC7IP<2:0>: Input Capture Channel 7 Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' INT1IP<2:0>: External Interrupt 1 Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled bit 11 bit 10-8 bit 7-3 bit 2-0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 81 dsPIC33FJ12GP201/202 REGISTER 6-17: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-7 bit 6-4 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-1 R/W-0 INT2IP<2:0> R/W-0 U-0 -- U-0 -- U-0 -- U-0 -- bit 0 IPC7: INTERRUPT PRIORITY CONTROL REGISTER 7 U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 Unimplemented: Read as `0' INT2IP<2:0>: External Interrupt 2 Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' bit 3-0 DS70264B-page 82 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 6-18: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-7 bit 6-4 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-1 R/W-0 U1EIP<2:0> R/W-0 U-0 -- U-0 -- U-0 -- U-0 -- bit 0 IPC16: INTERRUPT PRIORITY CONTROL REGISTER 16 U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 Unimplemented: Read as `0' U1EIP<2:0>: UART1 Error Interrupt Priority bits 111 = Interrupt is priority 7 (highest priority interrupt) * * * 001 = Interrupt is priority 1 000 = Interrupt source is disabled Unimplemented: Read as `0' bit 3-0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 83 dsPIC33FJ12GP201/202 REGISTER 6-19: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-12 bit 11-8 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R-0 R-0 R-0 R-0 VECNUM<6:0> bit 0 R-0 R-0 R-0 INTTREG: INTERRUPT CONTROL AND STATUS REGISTER U-0 -- U-0 -- U-0 -- R-0 R-0 ILR<3:0> bit 8 R-0 R-0 Unimplemented: Read as `0' ILR: New CPU Interrupt Priority Level bits 1111 = CPU Interrupt Priority Level is 15 * * * 0001 = CPU Interrupt Priority Level is 1 0000 = CPU Interrupt Priority Level is 0 Unimplemented: Read as `0' VECNUM: Vector Number of Pending Interrupt bits 0111111 = Interrupt Vector pending is number 135 * * * 0000001 = Interrupt Vector pending is number 9 0000000 = Interrupt Vector pending is number 8 bit 7 bit 6-0 DS70264B-page 84 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 6.4 6.4.1 1. 2. Interrupt Setup Procedures INITIALIZATION 6.4.3 TRAP SERVICE ROUTINE To configure an interrupt source at initialization: Set the NSTDIS bit (INTCON1<15>) if nested interrupts are not desired. Select the user-assigned priority level for the interrupt source by writing the control bits in the appropriate IPCx register. The priority level will depend on the specific application and type of interrupt source. If multiple priority levels are not desired, the IPCx register control bits for all enabled interrupt sources can be programmed to the same non-zero value. Note: At a device Reset, the IPCx registers are initialized such that all user interrupt sources are assigned to priority level 4. A Trap Service Routine is coded like an ISR, except that the appropriate trap status flag in the INTCON1 register must be cleared to avoid re-entry into the TSR. 6.4.4 INTERRUPT DISABLE All user interrupts can be disabled using this procedure: 1. 2. Push the current SR value onto the software stack using the PUSH instruction. Force the CPU to priority level 7 by inclusive ORing the value OEh with SRL. To enable user interrupts, the POP instruction can be used to restore the previous SR value. Note: Only user interrupts with a priority level of 7 or lower can be disabled. Trap sources (level 8-level 15) cannot be disabled. 3. 4. Clear the interrupt flag status bit associated with the peripheral in the associated IFSx register. Enable the interrupt source by setting the interrupt enable control bit associated with the source in the appropriate IECx register. The DISI instruction provides a convenient way to disable interrupts of priority levels 1-6 for a fixed period of time. Level 7 interrupt sources are not disabled by the DISI instruction. 6.4.2 INTERRUPT SERVICE ROUTINE the the the the The method used to declare an ISR and initialize IVT with the correct vector address depends on programming language (C or Assembler) and language development toolsuite used to develop application. In general, the user application must clear the interrupt flag in the appropriate IFSx register for the source of interrupt that the ISR handles. Otherwise, the program will re-enter the ISR immediately after exiting the routine. If the ISR is coded in assembly language, it must be terminated using a RETFIE instruction to unstack the saved PC value, SRL value and old CPU priority level. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 85 dsPIC33FJ12GP201/202 NOTES: DS70264B-page 86 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 7.0 Note: OSCILLATOR CONFIGURATION This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. oscillator system The dsPIC33FJ12GP201/202 provides: * An on-chip PLL to scale the internal operating frequency to the required system clock frequency * An internal FRC oscillator that can also be used with the PLL, thereby allowing full-speed operation without any external clock generation hardware * Clock switching between various clock sources * Programmable clock postscaler for system power savings * A Fail-Safe Clock Monitor (FSCM) that detects clock failure and takes fail-safe measures * A Clock Control register (OSCCON) * Nonvolatile Configuration bits for main oscillator selection. A simplified diagram of the oscillator system is shown in Figure 7-1. * External and internal oscillator options as clock sources FIGURE 7-1: dsPIC33FJ12GP201/202 OSCILLATOR SYSTEM DIAGRAM dsPIC33F Primary Oscillator DOZE<2:0> S2 DOZE FCY OSCO XT, HS, EC S3 OSCI S1 PLL(1) XTPLL, HSPLL, ECPLL, FRCPLL S1/S3 /2 FOSC FRC Oscillator FRCDIV FRCDIVN S7 TUN<5:0> / 16 FRCDIV<2:0> FRCDIV16 FRC LPRC S6 S0 LPRC Oscillator Secondary Oscillator SOSCO LPOSCEN SOSCI S5 SOSC S4 Clock Fail Clock Switch Reset S7 NOSC<2:0> FNOSC<2:0> WDT, PWRT, FSCM Timer 1 Note 1: See Figure 7-2 for PLL details. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 87 dsPIC33FJ12GP201/202 7.1 CPU Clocking System 7.1.2 SYSTEM CLOCK SELECTION The dsPIC33FJ12GP201/202 device provides seven system clock options: * * * * * * * Fast RC (FRC) Oscillator FRC Oscillator with PLL Primary (XT, HS or EC) Oscillator Primary Oscillator with PLL Secondary (LP) Oscillator Low-Power RC (LPRC) Oscillator FRC Oscillator with postscaler The oscillator source used at a device Power-on Reset event is selected using Configuration bit settings. The oscillator Configuration bit settings are located in the Configuration registers in the program memory. (Refer to Section 18.1 "Configuration Bits" for further details.) The Initial Oscillator Selection Configuration bits, FNOSC<2:0> (FOSCSEL<2:0>), and the Primary Oscillator Mode Select Configuration bits, POSCMD<1:0> (FOSC<1:0>), select the oscillator source that is used at a Power-on Reset. The FRC primary oscillator is the default (unprogrammed) selection. The Configuration bits allow users to choose among 12 different clock modes, shown in Table 7-1. The output of the oscillator (or the output of the PLL if a PLL mode has been selected) FOSC is divided by 2 to generate the device instruction clock (FCY). FCY defines the operating speed of the device, and speeds up to 40 MHz are supported by the dsPIC33FJ12GP201/202 architecture. Instruction execution speed or device operating frequency, FCY, is given by: 7.1.1 7.1.1.1 SYSTEM CLOCK SOURCES Fast RC The Fast RC (FRC) internal oscillator runs at a nominal frequency of 7.37 MHz. User software can tune the FRC frequency. User software can optionally specify a factor (ranging from 1:2 to 1:256) by which the FRC clock frequency is divided. This factor is selected using the FRCDIV<2:0> (CLKDIV<10:8>) bits. 7.1.1.2 Primary The primary oscillator can use one of the following as its clock source: * XT (Crystal): Crystals and ceramic resonators in the range of 3 MHz to 10 MHz. The crystal is connected to the OSC1 and OSC2 pins. * HS (High-Speed Crystal): Crystals in the range of 10 MHz to 40 MHz. The crystal is connected to the OSC1 and OSC2 pins. * EC (External Clock): External clock signal in the range of 0.8 MHz to 64 MHz. The external clock signal is directly applied to the OSC1 pin. EQUATION 7-1: DEVICE OPERATING FREQUENCY FCY = FOSC/2 7.1.3 PLL CONFIGURATION The primary oscillator and internal FRC oscillator can optionally use an on-chip PLL to obtain higher speeds of operation. The PLL provides significant flexibility in selecting the device operating speed. A block diagram of the PLL is shown in Figure 7-2. The output of the primary oscillator or FRC, denoted as `FIN', is divided down by a prescale factor (N1) of 2, 3,... or 33 before being provided to the PLL's Voltage Controlled Oscillator (VCO). The input to the VCO must be selected in the range of 0.8 MHz to 8 MHz. The prescale factor `N1' is selected using the PLLPRE<4:0> bits (CLKDIV<4:0>). The PLL Feedback Divisor, selected using the PLLDIV<8:0> bits (PLLFBD<8:0>), provides a factor `M,' by which the input to the VCO is multiplied. This factor must be selected such that the resulting VCO output frequency is in the range of 100 MHz to 200 MHz. The VCO output is further divided by a postscale factor `N2.' This factor is selected using the PLLPOST<1:0> bits (CLKDIV<7:6>). `N2' can be either 2, 4 or 8, and must be selected such that the PLL output frequency (FOSC) is in the range of 12.5 MHz to 80 MHz, which generates device operating speeds of 6.25-40 MIPS. 7.1.1.3 Secondary The secondary (LP) oscillator is designed for low power and uses a 32.768 kHz crystal or ceramic resonator. The LP oscillator uses the SOSCI and SOSCO pins. 7.1.1.4 Low-Power RC The Low-Power RC (LPRC) internal oscIllator runs at a nominal frequency of 32.768 kHz. It is also used as a reference clock by the Watchdog Timer (WDT) and Fail-Safe Clock Monitor (FSCM). 7.1.1.5 FRC The clock signals generated by the FRC and primary oscillators can be optionally applied to an on-chip Phase Locked Loop (PLL) to provide a wide range of output frequencies for device operation. PLL configuration is described in Section 7.1.3 "PLL Configuration". DS70264B-page 88 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 For a primary oscillator or FRC oscillator, output `FIN', the PLL output `FOSC' is given by: * If PLLDIV<8:0> = 0x1E, then M = 32. This yields a VCO output of 5 x 32 = 160 MHz, which is within the 100-200 MHz ranged needed. * If PLLPOST<1:0> = 0, then N2 = 2. This provides a Fosc of 160/2 = 80 MHz. The resultant device operating speed is 80/2 = 40 MIPS. EQUATION 7-2: FOSC CALCULATION M ( N1*N2 ) FOSC = FIN* For example, suppose a 10 MHz crystal is being used, with "XT with PLL" being the selected oscillator mode. * If PLLPRE<4:0> = 0, then N1 = 2. This yields a VCO input of 10/2 = 5 MHz, which is within the acceptable range of 0.8-8 MHz. EQUATION 7-3: XT WITH PLL MODE EXAMPLE FCY = FOSC 1 10000000*32 = = 40 MIPS 2 2 2*2 ( ) FIGURE 7-2: dsPIC33FJ12GP201/202 PLL BLOCK DIAGRAM 0.8-8.0 MHz Here 100-200 MHz Here 12.5-80 MHz Here FOSC Source (Crystal, External Clock or Internal RC) PLLPRE X VCO PLLDIV PLLPOST Divide by 2-33 Divide by 2-513 Divide by 2, 4, 8 TABLE 7-1: CONFIGURATION BIT VALUES FOR CLOCK SELECTION Oscillator Source Internal Internal Internal Secondary Primary Primary Primary Primary Primary Primary Internal Internal POSCMD<1:0> xx xx xx xx 10 01 00 10 01 00 xx xx FNOSC<2:0> 111 110 101 100 011 011 011 010 010 010 001 000 1 1 1 1 Note 1, 2 1 1 1 Oscillator Mode Fast RC Oscillator with Divide-by-N (FRCDIVN) Fast RC Oscillator with Divide-by-16 (FRCDIV16) Low-Power RC Oscillator (LPRC) Secondary (Timer1) Oscillator (SOSC) Primary Oscillator (HS) with PLL (HSPLL) Primary Oscillator (XT) with PLL (XTPLL) Primary Oscillator (EC) with PLL (ECPLL) Primary Oscillator (HS) Primary Oscillator (XT) Primary Oscillator (EC) Fast RC Oscillator with PLL (FRCPLL) Fast RC Oscillator (FRC) Note 1: 2: OSC2 pin function is determined by the OSCIOFNC Configuration bit. This is the default oscillator mode for an unprogrammed (erased) device. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 89 dsPIC33FJ12GP201/202 REGISTER 7-1: U-0 -- bit 15 R/W-0 CLKLOCK bit 7 Legend: R = Readable bit -n = Value at POR bit 15 bit 14-12 y = Value set from Configuration bits on POR W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 IOLOCK R-0 LOCK U-0 -- R/C-0 CF U-0 -- R/W-0 LPOSCEN OSCCON: OSCILLATOR CONTROL REGISTER R-0 R-0 COSC<2:0> R-0 U-0 -- R/W-y R/W-y NOSC<2:0> bit 8 R/W-0 OSWEN bit 0 R/W-y Unimplemented: Read as `0' COSC<2:0>: Current Oscillator Selection bits (read-only) 000 = Fast RC oscillator (FRC) 001 = Fast RC oscillator (FRC) with PLL 010 = Primary oscillator (XT, HS, EC) 011 = Primary oscillator (XT, HS, EC) with PLL 100 = Secondary oscillator (SOSC) 101 = Low-Power RC oscillator (LPRC) 110 = Fast RC oscillator (FRC) with Divide-by-16 111 = Fast RC oscillator (FRC) with Divide-by-n Unimplemented: Read as `0' NOSC<2:0>: New Oscillator Selection bits 000 = Fast RC oscillator (FRC) 001 = Fast RC oscillator (FRC) with PLL 010 = Primary oscillator (XT, HS, EC) 011 = Primary oscillator (XT, HS, EC) with PLL 100 = Secondary oscillator (SOSC) 101 = Low-Power RC oscillator (LPRC) 110 = Fast RC oscillator (FRC) with Divide-by-16 111 = Fast RC oscillator (FRC) with Divide-by-n CLKLOCK: Clock Lock Enable bit If clock switching is enabled and FSCM is disabled (FOSC bit 11 bit 10-8 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 DS70264B-page 90 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 7-1: bit 1 OSCCON: OSCILLATOR CONTROL REGISTER (CONTINUED) LPOSCEN: Secondary (LP) Oscillator Enable bit 1 = Enable secondary oscillator 0 = Disable secondary oscillator OSWEN: Oscillator Switch Enable bit 1 = Request oscillator switch to selection specified by NOSC<2:0> bits 0 = Oscillator switch is complete bit 0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 91 dsPIC33FJ12GP201/202 REGISTER 7-2: R/W-0 ROI bit 15 R/W-0 bit 7 Legend: R = Readable bit -n = Value at POR bit 15 y = Value set from Configuration bits on POR W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-1 U-0 -- R/W-0 R/W-0 R/W-0 PLLPRE<4:0> bit 0 R/W-0 CLKDIV: CLOCK DIVISOR REGISTER R/W-0 R/W-0 DOZE<2:0> R/W-0 R/W-0 DOZEN(1) R/W-1 R/W-0 FRCDIV<2:0> bit 8 R/W-0 R/W-0 PLLPOST<1:0> ROI: Recover on Interrupt bit 1 = Interrupts will clear the DOZEN bit and the processor clock/peripheral clock ratio is set to 1:1 0 = Interrupts have no effect on the DOZEN bit DOZE<2:0>: Processor Clock Reduction Select bits 000 = FCY/1 001 = FCY/2 010 = FCY/4 011 = FCY/8 (default) 100 = FCY/16 101 = FCY/32 110 = FCY/64 111 = FCY/128 DOZEN: DOZE Mode Enable bit(1) 1 = DOZE<2:0> field specifies the ratio between the peripheral clocks and the processor clocks 0 = Processor clock/peripheral clock ratio forced to 1:1 FRCDIV<2:0>: Internal Fast RC Oscillator Postscaler bits 000 = FRC divide by 1 (default) 001 = FRC divide by 2 010 = FRC divide by 4 011 = FRC divide by 8 100 = FRC divide by 16 101 = FRC divide by 32 110 = FRC divide by 64 111 = FRC divide by 256 PLLPOST<1:0>: PLL VCO Output Divider Select bits (also denoted as `N2', PLL postscaler) 00 = Output/2 01 = Output/4 (default) 10 = Reserved 11 = Output/8 Unimplemented: Read as `0' PLLPRE<4:0>: PLL Phase Detector Input Divider bits (also denoted as `N1', PLL prescaler) 00000 = Input/2 (default) 00001 = Input/3 *** 11111 = Input/33 This bit is cleared when the ROI bit is set and an interrupt occurs. bit 14-12 bit 11 bit 10-8 bit 7-6 bit 5 bit 4-0 Note 1: DS70264B-page 92 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 7-3: U-0 -- bit 15 R/W-0 bit 7 Legend: R = Readable bit -n = Value at POR bit 15-9 bit 8-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 R/W-1 R/W-1 R/W-0 R/W-0 R/W-0 PLLFBD: PLL FEEDBACK DIVISOR REGISTER U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- R/W-0(1) PLLDIV<8> bit 8 R/W-0 bit 0 PLLDIV<7:0> Unimplemented: Read as `0' PLLDIV<8:0>: PLL Feedback Divisor bits (also denoted as `M', PLL multiplier) 000000000 = 2 000000001 = 3 000000010 = 4 * * * 000110000 = 50 (default) * * * 111111111 = 513 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 93 dsPIC33FJ12GP201/202 REGISTER 7-4: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-6 bit 5-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 OSCTUN: FRC OSCILLATOR TUNING REGISTER U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 R/W-0 bit 0 TUN<5:0> Unimplemented: Read as `0' TUN<5:0>: FRC Oscillator Tuning bits 011111 = Center frequency + 11.625% 011110 = Center frequency + 11.25% (8.23 MHz) * * * 000001 = Center frequency + 0.375% (7.40 MHz) 000000 = Center frequency (7.37 MHz nominal) 111111 = Center frequency -0.375% (7.345 MHz) * * * 100001 = Center frequency -11.625% (6.52 MHz) 100000 = Center frequency -12% (6.49 MHz) DS70264B-page 94 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 7.2 Clock Switching Operation 1. Applications are free to switch among any of the four clock sources (Primary, LP, FRC and LPRC) under software control at any time. To limit the possible side effects of this flexibility, dsPIC33FJ12GP201/202 devices have a safeguard lock built into the switch process. Note: Primary Oscillator mode has three different submodes (XT, HS and EC), which are determined by the POSCMD<1:0> Configuration bits. While an application can switch to and from Primary Oscillator mode in software, it cannot switch among the different primary submodes without reprogramming the device. The clock switching hardware compares the COSC status bits with the new value of the NOSC control bits. If they are the same, the clock switch is a redundant operation. In this case, the OSWEN bit is cleared automatically and the clock switch is aborted. If a valid clock switch has been initiated, the LOCK (OSCCON<5>) and the CF (OSCCON<3>) status bits are cleared. The new oscillator is turned on by the hardware if it is not currently running. If a crystal oscillator must be turned on, the hardware waits until the Oscillator Start-up Timer (OST) expires. If the new source is using the PLL, the hardware waits until a PLL lock is detected (LOCK = 1). The hardware waits for 10 clock cycles from the new clock source and then performs the clock switch. The hardware clears the OSWEN bit to indicate a successful clock transition. In addition, the NOSC bit values are transferred to the COSC status bits. The old clock source is turned off at this time, with the exception of LPRC (if WDT or FSCM are enabled) or LP (if LPOSCEN remains set). Note 1: The processor continues to execute code throughout the clock switching sequence. Timing-sensitive code should not be executed during this time. 2: Direct clock switches between any primary oscillator mode with PLL and FRCPLL mode are not permitted. This applies to clock switches in either direction. In these instances, the application must switch to FRC mode as a transition clock source between the two PLL modes. 2. 3. 4. 7.2.1 ENABLING CLOCK SWITCHING 5. To enable clock switching, the FCKSM1 Configuration bit in the Configuration register must be programmed to `0'. (Refer to Section 18.1 "Configuration Bits" for further details.) If the FCKSM1 Configuration bit is unprogrammed (`1'), the clock switching function and Fail-Safe Clock Monitor function are disabled. This is the default setting. The NOSC control bits (OSCCON<10:8>) do not control the clock selection when clock switching is disabled. However, the COSC bits (OSCCON<14:12>) reflect the clock source selected by the FNOSC Configuration bits. The OSWEN control bit (OSCCON<0>) has no effect when clock switching is disabled. It is held at `0' at all times. 6. 7.2.2 Performing sequence: 1. OSCILLATOR SWITCHING SEQUENCE a clock switch requires this basic 7.3 Fail-Safe Clock Monitor (FSCM) 2. 3. 4. 5. If desired, read the COSC bits (OSCCON<14:12>) to determine the current oscillator source. Perform the unlock sequence to allow a write to the OSCCON register high byte. Write the appropriate value to the NOSC control bits (OSCCON<10:8>) for the new oscillator source. Perform the unlock sequence to allow a write to the OSCCON register low byte. Set the OSWEN bit to initiate the oscillator switch. The Fail-Safe Clock Monitor (FSCM) allows the device to continue to operate even in the event of an oscillator failure. The FSCM function is enabled by programming. If the FSCM function is enabled, the LPRC internal oscillator runs at all times (except during Sleep mode) and is not subject to control by the Watchdog Timer. In the event of an oscillator failure, the FSCM generates a clock failure trap event and switches the system clock over to the FRC oscillator. Then the application program can either attempt to restart the oscillator or execute a controlled shutdown. The trap can be treated as a warm Reset by simply loading the Reset address into the oscillator fail trap vector. If the PLL multiplier is used to scale the system clock, the internal FRC is also multiplied by the same factor on clock failure. Essentially, the device switches to FRC with PLL on a clock failure. Once the basic sequence is completed, the system clock hardware responds automatically as follows: (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 95 dsPIC33FJ12GP201/202 NOTES: DS70264B-page 96 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 8.0 Note: POWER-SAVING FEATURES This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. 8.2 Instruction-Based Power-Saving Modes dsPIC33FJ12GP201/202 devices have two special power-saving modes that are entered through the execution of a special PWRSAV instruction. Sleep mode stops clock operation and halts all code execution. Idle mode halts the CPU and code execution, but allows peripheral modules to continue operation. The Assembler syntax of the PWRSAV instruction is shown in Example 8-1. Note: SLEEP_MODE and IDLE_MODE are constants defined in the assembler include file for the selected device. The dsPIC33FJ12GP201/202 devices provide the ability to manage power consumption by selectively managing clocking to the CPU and the peripherals. In general, a lower clock frequency and a reduction in the number of circuits being clocked constitutes lower consumed power. dsPIC33FJ12GP201/202 devices can manage power consumption in four different ways: * * * * Clock frequency Instruction-based Sleep and Idle modes Software-controlled Doze mode Selective peripheral control in software Sleep and Idle modes can be exited as a result of an enabled interrupt, WDT time-out or a device Reset. When the device exits these modes, it is said to wake-up. 8.2.1 SLEEP MODE The following occur in Sleep mode: * The system clock source is shut down. If an on-chip oscillator is used, it is turned off. * The device current consumption is reduced to a minimum, provided that no I/O pin is sourcing current. * The Fail-Safe Clock Monitor does not operate, since the system clock source is disabled. * The LPRC clock continues to run if the WDT is enabled. * The WDT, if enabled, is automatically cleared prior to entering Sleep mode. * Some device features or peripherals may continue to operate. This includes items such as the input change notification on the I/O ports, or peripherals that use an external clock input. * Any peripheral that requires the system clock source for its operation is disabled. The device will wake-up from Sleep mode on any of the these events: * Any interrupt source that is individually enabled * Any form of device Reset * A WDT time-out On wake-up from Sleep mode, the processor restarts with the same clock source that was active when Sleep mode was entered. Combinations of these methods can be used to selectively tailor an application's power consumption while still maintaining critical application features, such as timing-sensitive communications. 8.1 Clock Frequency and Clock Switching dsPIC33FJ12GP201/202 devices allow a wide range of clock frequencies to be selected under application control. If the system clock configuration is not locked, users can choose low-power or high-precision oscillators by simply changing the NOSC bits (OSCCON<10:8>). The process of changing a system clock during operation, as well as limitations to the process, are discussed in more detail in Section 7.0 "Oscillator Configuration". EXAMPLE 8-1: PWRSAV INSTRUCTION SYNTAX ; Put the device into SLEEP mode ; Put the device into IDLE mode PWRSAV #SLEEP_MODE PWRSAV #IDLE_MODE (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 97 dsPIC33FJ12GP201/202 8.2.2 IDLE MODE The following occur in Idle mode: * The CPU stops executing instructions. * The WDT is automatically cleared. * The system clock source remains active. By default, all peripheral modules continue to operate normally from the system clock source, but can also be selectively disabled (see Section 8.4 "Peripheral Module Disable"). * If the WDT or FSCM is enabled, the LPRC also remains active. The device will wake from Idle mode on any of these events: * Any interrupt that is individually enabled. * Any device Reset * A WDT time-out On wake-up from Idle mode, the clock is reapplied to the CPU and instruction execution begins immediately, starting with the instruction following the PWRSAV instruction, or the first instruction in the ISR. Doze mode is enabled by setting the DOZEN bit (CLKDIV<11>). The ratio between peripheral and core clock speed is determined by the DOZE<2:0> bits (CLKDIV<14:12>). There are eight possible configurations, from 1:1 to 1:128, with 1:1 being the default setting. Programs can use Doze mode to selectively reduce power consumption in event-driven applications. This allows clock-sensitive functions, such as synchronous communications, to continue without interruption while the CPU idles, waiting for something to invoke an interrupt routine. An automatic return to full-speed CPU operation on interrupts can be enabled by setting the ROI bit (CLKDIV<15>). By default, interrupt events have no effect on Doze mode operation. For example, suppose the device is operating at 20 MIPS and the CAN module has been configured for 500 kbps based on this device operating speed. If the device is placed in Doze mode with a clock frequency ratio of 1:4, the CAN module continues to communicate at the required bit rate of 500 kbps, but the CPU now starts executing instructions at a frequency of 5 MIPS. 8.2.3 INTERRUPTS COINCIDENT WITH POWER SAVE INSTRUCTIONS 8.4 Peripheral Module Disable Any interrupt that coincides with the execution of a PWRSAV instruction is held off until entry into Sleep or Idle mode has completed. The device then wakes up from Sleep or Idle mode. 8.3 Doze Mode The preferred strategies for reducing power consumption are changing clock speed and invoking one of the power-saving modes. In some circumstances, however, these are not practical. For example, it may be necessary for an application to maintain uninterrupted synchronous communication, even while it is doing nothing else. Reducing system clock speed can introduce communication errors, while using a power-saving mode can stop communications completely. Doze mode is a simple and effective alternative method to reduce power consumption while the device is still executing code. In this mode, the system clock continues to operate from the same source and at the same speed. Peripheral modules continue to be clocked at the same speed, while the CPU clock speed is reduced. Synchronization between the two clock domains is maintained, allowing the peripherals to access the SFRs while the CPU executes code at a slower rate. The Peripheral Module Disable (PMD) registers provide a method to disable a peripheral module by stopping all clock sources supplied to that module. When a peripheral is disabled using the appropriate PMD control bit, the peripheral is in a minimum power consumption state. The control and status registers associated with the peripheral are also disabled, so writes to those registers will have no effect and read values will be invalid. A peripheral module is enabled only if both the associated bit in the PMD register is cleared and the peripheral is supported by the specific dsPIC(R) DSC variant. If the peripheral is present in the device, it is enabled in the PMD register by default. Note: If a PMD bit is set, the corresponding module is disabled after a delay of one instruction cycle. Similarly, if a PMD bit is cleared, the corresponding module is enabled after a delay of one instruction cycle (assuming the module control registers are already configured to enable module operation). DS70264B-page 98 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 9.0 Note: I/O PORTS This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. When a peripheral is enabled and the peripheral is actively driving an associated pin, the use of the pin as a general purpose output pin is disabled. The I/O pin can be read, but the output driver for the parallel port bit is disabled. If a peripheral is enabled, but the peripheral is not actively driving a pin, that pin can be driven by a port. All port pins have three registers directly associated with their operation as digital I/O. The data direction register (TRISx) determines whether the pin is an input or an output. If the data direction bit is a `1', then the pin is an input. All port pins are defined as inputs after a Reset. Reads from the latch (LATx) read the latch. Writes to the latch, write the latch. Reads from the port (PORTx) read the port pins, while writes to the port pins write the latch. Any bit and its associated data and control registers that are not valid for a particular device will be disabled. That means the corresponding LATx and TRISx registers and the port pin will read as zeros. When a pin is shared with another peripheral or function that is defined as an input only, it is nevertheless regarded as a dedicated port because there is no other competing source of outputs. All of the device pins (except VDD, VSS, MCLR and OSC1/CLKI) are shared among the peripherals and the parallel I/O ports. All I/O input ports feature Schmitt Trigger inputs for improved noise immunity. 9.1 Parallel I/O (PIO) Ports A parallel I/O port that shares a pin with a peripheral is generally subservient to the peripheral. The peripheral's output buffer data and control signals are provided to a pair of multiplexers. The multiplexers select whether the peripheral or the associated port has ownership of the output data and control signals of the I/O pin. The logic also prevents "loop through," in which a port's digital output can drive the input of a peripheral that shares the same pin. Figure 9-1 shows how ports are shared with other peripherals and the associated I/O pin to which they are connected. FIGURE 9-1: BLOCK DIAGRAM OF A TYPICAL SHARED PORT STRUCTURE Peripheral Module Peripheral Input Data Peripheral Module Enable Peripheral Output Enable Peripheral Output Data 1 0 1 0 Output Enable Output Multiplexers I/O PIO Module Read TRIS Output Data Data Bus WR TRIS D CK Q I/O Pin TRIS Latch D WR LAT + WR Port CK Data Latch Q Read LAT Input Data Read Port (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 99 dsPIC33FJ12GP201/202 9.1.1 OPEN-DRAIN CONFIGURATION 9.3 Input Change Notification In addition to the PORT, LAT and TRIS registers for data control, each port pin can also be individually configured for either digital or open-drain output. This is controlled by the Open-Drain Control register, ODCx, associated with each port. Setting any of the bits configures the corresponding pin to act as an open-drain output. The open-drain feature allows the generation of outputs higher than VDD (e.g., 5V) on any desired digital-only pins by using external pull-up resistors. The maximum open-drain voltage allowed is the same as the maximum VIH specification. The input change notification function of the I/O ports allows the dsPIC33FJ12GP201/202 devices to generate interrupt requests to the processor in response to a change-of-state on selected input pins. This feature can detect input change-of-states even in Sleep mode, when the clocks are disabled. Depending on the device pin count, up to 21 external signals (CNx pin) can be selected (enabled) for generating an interrupt request on a change-of-state. Four control registers are associated with the CN module. The CNEN1 and CNEN2 registers contain the interrupt enable control bits for each of the CN input pins. Setting any of these bits enables a CN interrupt for the corresponding pins. Each CN pin also has a weak pull-up connected to it. The pull-ups act as a current source connected to the pin, and eliminate the need for external resistors when push button or keypad devices are connected. The pull-ups are enabled separately using the CNPU1 and CNPU2 registers, which contain the control bits for each of the CN pins. Setting any of the control bits enables the weak pull-ups for the corresponding pins. Note: Pull-ups on change notification pins should always be disabled when the port pin is configured as a digital output. 9.2 Configuring Analog Port Pins The AD1PCFG and TRIS registers control the operation of the Analog-to-Digital (A/D) port pins. The port pins that are desired as analog inputs must have their corresponding TRIS bit set (input). If the TRIS bit is cleared (output), the digital output level (VOH or VOL) will be converted. When the PORT register is read, all pins configured as analog input channels will read as cleared (a low level). Pins configured as digital inputs will not convert an analog input. Analog levels on any pin that is defined as a digital input (including the ANx pins) can cause the input buffer to consume current that exceeds the device specifications. 9.2.1 I/O PORT WRITE/READ TIMING One instruction cycle is required between a port direction change or port write operation and a read operation of the same port. Typically this instruction would be a NOP. An example is shown in Example 9-1. EXAMPLE 9-1: MOV MOV NOP btss 0xFF00, W0 W0, TRISBB PORTB, #13 PORT WRITE/READ EXAMPLE ; ; ; ; Configure PORTB<15:8> as inputs and PORTB<7:0> as outputs Delay 1 cycle Next Instruction DS70264B-page 100 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 9.4 Peripheral Pin Select A major challenge in general purpose devices is providing the largest possible set of peripheral features while minimizing the conflict of features on I/O pins. The challenge is even greater on low-pin count devices. In an application where more than one peripheral must be assigned to a single pin, inconvenient workarounds in application code or a complete redesign may be the only option. Peripheral pin select configuration enables peripheral set selection and placement on a wide range of I/O pins. By increasing the pinout options available on a particular device, programmers can better tailor the microcontroller to their entire application, rather than trimming the application to fit the device. The peripheral pin select configuration feature operates over a fixed subset of digital I/O pins. Programmers can independently map the input and/or output of most digital peripherals to any one of these I/O pins. Peripheral pin select is performed in software, and generally does not require the device to be reprogrammed. Hardware safeguards are included that prevent accidental or spurious changes to the peripheral mapping, once it has been established. Remappable peripherals are not associated with a default I/O pin. The peripheral must always be assigned to a specific I/O pin before it can be used. In contrast, non remappable peripherals are always available on a default pin, assuming that the peripheral is active and not conflicting with another peripheral. 9.4.2.1 Peripheral Pin Select Function Priority When a remappable peripheral is active on a given I/O pin, it takes priority over all other digital I/O and digital communication peripherals associated with the pin. Priority is given regardless of the type of peripheral that is mapped. Remappable peripherals never take priority over any analog functions associated with the pin. 9.4.3 CONTROLLING PERIPHERAL PIN SELECT Peripheral pin select features are controlled through two sets of special function registers: one to map peripheral inputs, and one to map outputs. Because they are separately controlled, a particular peripheral's input and output (if the peripheral has both) can be placed on any selectable function pin without constraint. The association of a peripheral to a peripheral selectable pin is handled in two different ways, depending on whether an input or output is being mapped. 9.4.1 AVAILABLE PINS The peripheral pin select feature is used with a range of up to 16 pins. The number of available pins depends on the particular device and its pin count. Pins that support the peripheral pin select feature include the designation "RPn" in their full pin designation, where "RP" designates a remappable peripheral and "n" is the remappable pin number. 9.4.3.1 Input Mapping 9.4.2 AVAILABLE PERIPHERALS The peripherals managed by the peripheral pin select feature are all digital-only peripherals. These include: * General serial communications (UART and SPI) * General purpose timer clock inputs * Timer-related peripherals (input capture and output compare) * Interrupt-on-change inputs In comparison, some digital-only peripheral modules are never included in the peripheral pin select feature. This is because the peripheral's function requires special I/O circuitry on a specific port and cannot be easily connected to multiple pins. These modules include I2C. A similar requirement excludes all modules with analog inputs, such as the Analog-to-Digital Converter (ADC). The inputs of the peripheral pin select options are mapped on the basis of the peripheral. A control register associated with a peripheral dictates the pin it will be mapped to. The RPINRx registers are used to configure peripheral input mapping (see Register 9-1 through Register 9-9). Each register contains sets of 5-bit fields, with each set associated with one of the remappable peripherals. Programming a given peripheral's bit field with an appropriate 5-bit value maps the RPn pin with that value to that peripheral. For any given device, the valid range of values for any bit field corresponds to the maximum number of peripheral pin selections supported by the device. Figure 9-2 Illustrates remappable pin selection for U1RX input. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 101 dsPIC33FJ12GP201/202 FIGURE 9-2: REMAPPABLE MUX INPUT FOR U1RX U1RXR<4:0> 0 RP0 1 RP1 2 RP2 U1RX input to peripheral 15 RP15 TABLE 9-1: SELECTABLE INPUT SOURCES (MAPS INPUT TO FUNCTION)(1) Input Name Function Name INT1 INT2 T2CK T3CK IC1 IC2 IC7 IC8 OCFA U1RX U1CTS SDI1 SCK1IN SS1IN Register RPINR0 RPINR1 RPINR3 RPINR3 RPINR7 RPINR7 RPINR10 RPINR10 RPINR11 RPINR18 RPINR18 RPINR20 RPINR20 RPINR21 Configuration Bits INT1R<4:0> INT2R<4:0> T2CKR<4:0> T3CKR<4:0> IC1R<4:0> IC2R<4:0> IC7R<4:0> IC8R<4:0> OCFAR<4:0> U1RXR<4:0> U1CTSR<4:0> SDI1R<4:0> SCK1R<4:0> SS1R<4:0> External Interrupt 1 External Interrupt 2 Timer 2 External Clock Timer 3 External Clock Input Capture 1 Input Capture 2 Input Capture 7 Input Capture 8 Output Compare Fault A UART 1 Receive UART 1 Clear To Send SPI 1 Data Input SPI 1 Clock Input SPI 1 Slave Select Input Note 1: Unless otherwise noted, all inputs use the Schmitt input buffers. DS70264B-page 102 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 9.4.3.2 Output Mapping In contrast to inputs, the outputs of the peripheral pin select options are mapped on the basis of the pin. In this case, a control register associated with a particular pin dictates the peripheral output to be mapped. The RPORx registers are used to control output mapping. Like the RPINRx registers, each register contains sets of 5-bit fields, with each set associated with one RPn pin (see Register 9-10 through Register 9-17). The value of the bit field corresponds to one of the peripherals, and that peripheral's output is mapped to the pin (see Table 9-2 and Figure 9-3). The list of peripherals for output mapping also includes a null value of 00000 because of the mapping technique. This permits any given pin to remain unconnected from the output of any of the pin selectable peripherals. FIGURE 9-3: MULTIPLEXING OF REMAPPABLE OUTPUT FOR RPn RPnR<4:0> Default U1TX Output Enable 0 3 U1RTS Output Enable 4 Output Enable OC1 Output Enable OC2 Output Enable 18 19 Default U1TX Output U1RTS Output 0 3 4 Output Data RPn OC1 Output OC2 Output 18 19 TABLE 9-2: NULL U1TX U1RTS SDO1 SCK1OUT SS1OUT OC1 OC2 OUTPUT SELECTION FOR REMAPPABLE PIN (RPn) RPnR<4:0> 00000 00011 00100 00111 01000 01001 10010 10011 Output Name RPn tied to default port pin RPn tied to UART 1 Transmit RPn tied to UART 1 Ready To Send RPn tied to SPI 1 Data Output RPn tied to SPI 1 Clock Output RPn tied to SPI 1 Slave Select Output RPn tied to Output Compare 1 RPn tied to Output Compare 2 Function (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 103 dsPIC33FJ12GP201/202 9.4.3.3 Mapping 9.4.4.2 Continuous State Monitoring The control schema of peripheral select pins is not limited to a small range of fixed peripheral configurations. There are no mutual or hardware-enforced lockouts between any of the peripheral mapping SFRs. Literally any combination of peripheral mappings across any or all of the RPn pins is possible. This includes both many-to-one and one-to-many mappings of peripheral inputs and outputs to pins. While such mappings may be technically possible from a configuration point of view, they may not be supportable electrically. In addition to being protected from direct writes, the contents of the RPINRx and RPORx registers are constantly monitored in hardware by shadow registers. If an unexpected change in any of the registers occurs (such as cell disturbances caused by ESD or other external events), a configuration mismatch Reset will be triggered. 9.4.4.3 Configuration Bit Pin Select Lock 9.4.4 CONTROLLING CONFIGURATION CHANGES Because peripheral remapping can be changed during run time, some restrictions on peripheral remapping are needed to prevent accidental configuration changes. dsPIC33F devices include three features to prevent alterations to the peripheral map: * Control register lock sequence * Continuous state monitoring * Configuration bit pin select lock As an additional level of safety, the device can be configured to prevent more than one write session to the RPINRx and RPORx registers. The IOL1WAY (FOSC 9.4.5 CONSIDERATIONS FOR PERIPHERAL PIN SELECTION 9.4.4.1 Control Register Lock Under normal operation, writes to the RPINRx and RPORx registers are not allowed. Attempted writes appear to execute normally, but the contents of the registers remain unchanged. To change these registers, they must be unlocked in hardware. The register lock is controlled by the IOLOCK bit (OSCCON<6>). Setting IOLOCK prevents writes to the control registers; clearing IOLOCK allows writes. To set or clear IOLOCK, a specific command sequence must be executed: 1. 2. 3. Write 0x46 to OSCCON<7:0>. Write 0x57 to OSCCON<7:0>. Clear (or set) IOLOCK as a single operation. Note: MPLAB(R) C30 provides built-in C language functions for unlocking the OSCCON register: __builtin_write_OSCCONL(value) __builtin_write_OSCCONH(value) The ability to control peripheral pin selection introduces several considerations into application design, including several common peripherals that are only available as remappable peripherals. 9.4.5.1 Configuration The peripheral pin selects are not available on default pins in the device's default (Reset) state. More specifically, since all RPINRx and RPORx registers reset to 0000h, this means all peripheral pin select inputs are tied to RP0, while all peripheral pin select outputs are disconnected. This means that before any other application code is executed, the user application must initialize the device with the proper peripheral configuration. Since the IOLOCK bit resets in the unlocked state, it is not necessary to execute the unlock sequence after the device has come out of Reset. For the sake of application safety, however, it is always a good idea to set IOLOCK and lock the configuration after writing to the control registers. Because the unlock sequence is timing-critical, it must be executed as an assembly language routine, in the same manner as changes to the oscillator configuration. If the bulk of the application is written in C or another high-level language, the unlock sequence should be performed by writing inline assembly. See MPLAB information. IDE Help for more Unlike the similar sequence with the oscillator's LOCK bit, IOLOCK remains in one state until changed. This allows all of the peripheral pin selects to be configured with a single unlock sequence followed by an update to all control registers, then locked with a second lock sequence. DS70264B-page 104 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 9.4.5.2 Changing the Configuration EXAMPLE 9-2: Choosing the configuration requires review of all peripheral pin selects and their pin assignments, especially those that will not be used in the application. In all cases, unused pin selectable peripherals should be disabled completely. Unused peripherals should have their inputs assigned to an unused RPn pin function. I/O pins with unused RPn functions should be configured with the null peripheral output. The assignment of a peripheral to a particular pin does not automatically perform any other configuration of the pin's I/O circuitry. This means adding a pin selectable output to a pin can inadvertently drive an existing peripheral input when the output is driven. Programmers must be familiar with the behavior of other fixed peripherals that share a remappable pin, and know when to enable or disable them. To be safe, fixed digital peripherals that share the same pin should be disabled when not in use. CONFIGURING UART1 INPUT AND OUTPUT FUNCTIONS //************************************* // Unlock Registers //************************************* asm volatile ( "mov #OSCCONL, w1 \n" "mov #0x46, w2 \n" "mov #0x57, w3 \n" "mov.b w2, [w1] \n" "mov.b w3, [w1] \n" "bclr OSCCON, 6"); //*************************** // Configure Input Functions // (See Table 9-1) //*************************** //*************************** // Assign U1Rx To Pin RP0 //*************************** RPINR18bits.U1RXR = 0; //*************************** // Assign U1CTS To Pin RP1 //*************************** RPINR18bits.U1CTSR = 1; //*************************** // Configure Output Functions // (See Table 9-2) //*************************** //*************************** // Assign U1Tx To Pin RP2 //*************************** RPOR1bits.RP2R = 3; //*************************** // Assign U1RTS To Pin RP3 //*************************** RPOR1bits.RP3R = 4; //************************************* // Lock Registers //************************************* asm volatile ( "mov #OSCCONL, w1 \n" "mov #0x46, w2 \n" "mov #0x57, w3 \n" "mov.b w2, [w1] \n" "mov.b w3, [w1] \n" "bset OSCCON, 6"); 9.4.5.3 Pin Operation Configuring a remappable pin for a specific peripheral does not automatically turn that feature on. The peripheral must be specifically configured for operation and enabled, as if it were tied to a fixed pin. Where this happens in the application code (immediately following device Reset and peripheral configuration, or inside the main application routine) depends on the peripheral and its use in the application. 9.4.5.4 Analog Function A final consideration is that peripheral pin select functions neither override analog inputs nor reconfigure pins with analog functions for digital I/O. If a pin is configured as an analog input on device Reset, it must be explicitly reconfigured as digital I/O when used with a peripheral pin select. 9.4.5.5 Configuration Example Example 9-2 shows a configuration for bidirectional communication with flow control using UART1. The following input and output functions are used: * Input Functions: U1RX, U1CTS * Output Functions: U1TX, U1RTS (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 105 dsPIC33FJ12GP201/202 9.5 Peripheral Pin Select Registers The dsPIC33FJ12GP201/202 devices implement 17 registers for remappable peripheral configuration: * Input Remappable Peripheral Registers (9) * Output Remappable Peripheral Registers (8) Note: Input and Output Register values can only be changed if OSCCON REGISTER 9-1: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12-8 RPINR0: PERIPHERAL PIN SELECT INPUT REGISTER 0 U-0 -- U-0 -- R/W-1 R/W-1 R/W-1 INT1R<4:0> bit 8 U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 0 R/W-1 R/W-1 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown Unimplemented: Read as `0' INT1R<4:0>: Assign External Interrupt 1 (INTR1) to the corresponding RPn pin bits 11111 = Input tied to VSS 01111 = Input tied to RP15 * * * 00001 = Input tied to RP1 00000 = Input tied to RP0 Unimplemented: Read as `0' bit 7-0 DS70264B-page 106 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 9-2: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-5 bit 4-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- R/W-1 R/W-1 R/W-1 INT2R<4:0> bit 0 R/W-1 RPINR1: PERIPHERAL PIN SELECT INPUT REGISTER 1 U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 R/W-1 Unimplemented: Read as `0' INT2R<4:0>: Assign External Interrupt 2 (INTR2) to the corresponding RPn pin bits 11111 = Input tied to VSS 01111 = Input tied to RP15 * * * 00001 = Input tied to RP1 00000 = Input tied to RP0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 107 dsPIC33FJ12GP201/202 REGISTER 9-3: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12-8 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- R/W-1 R/W-1 R/W-1 T2CKR<4:0> bit 0 R/W-1 RPINR3: PERIPHERAL PIN SELECT INPUT REGISTER 3 U-0 -- U-0 -- R/W-1 R/W-1 R/W-1 T3CKR<4:0> bit 8 R/W-1 R/W-1 R/W-1 Unimplemented: Read as `0' T3CKR<4:0>: Assign Timer3 External Clock (T3CK) to the Corresponding RPn pin bits 11111 = Input tied to VSS 01111 = Input tied to RP15 * * * 00001 = Input tied to RP1 00000 = Input tied to RP0 Unimplemented: Read as `0' T2CKR<4:0>: Assign Timer2 External Clock (T2CK) to the Corresponding RPn pin bits 11111 = Input tied to VSS 01111 = Input tied to RP15 * * * 00001 = Input tied to RP1 00000 = Input tied to RP0 bit 7-5 bit 4-0 DS70264B-page 108 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 9-4: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12-8 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- R/W-1 R/W-1 R/W-1 IC1R<4:0> bit 0 R/W-1 RPINR7: PERIPHERAL PIN SELECT INPUT REGISTER 7 U-0 -- U-0 -- R/W-1 R/W-1 R/W-1 IC2R<4:0> bit 8 R/W-1 R/W-1 R/W-1 Unimplemented: Read as `0' IC2R<4:0>: Assign Input Capture 2 (IC2) to the corresponding RPn pin bits 11111 = Input tied to VSS 01111 = Input tied to RP15 * * * 00001 = Input tied to RP1 00000 = Input tied to RP0 Unimplemented: Read as `0' IC1R<4:0>: Assign Input Capture 1 (IC1) to the corresponding RPn pin bits 11111 = Input tied to VSS 01111 = Input tied to RP15 * * * 00001 = Input tied to RP1 00000 = Input tied to RP0 bit 7-5 bit 4-0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 109 dsPIC33FJ12GP201/202 REGISTER 9-5: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12-8 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- R/W-1 R/W-1 R/W-1 IC7R<4:0> bit 0 R/W-1 RPINR10: PERIPHERAL PIN SELECT INPUT REGISTERS 10 U-0 -- U-0 -- R/W-1 R/W-1 R/W-1 IC8R<4:0> bit 8 R/W-1 R/W-1 R/W-1 Unimplemented: Read as `0' IC8R<4:0>: Assign Input Capture 8 (IC8) to the corresponding pin RPn pin bits 11111 = Input tied to VSS 01111 = Input tied to RP15 * * * 00001 = Input tied to RP1 00000 = Input tied to RP0 Unimplemented: Read as `0' IC7R<4:0>: Assign Input Capture 7 (IC7) to the corresponding pin RPn pin bits 11111 = Input tied to VSS 01111 = Input tied to RP15 * * * 00001 = Input tied to RP1 00000 = Input tied to RP0 bit 7-5 bit 4-0 DS70264B-page 110 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 9-6: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-5 bit 4-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- R/W-1 R/W-1 R/W-1 OCFAR<4:0> bit 0 R/W-1 RPINR11: PERIPHERAL PIN SELECT INPUT REGISTER 11 U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 R/W-1 Unimplemented: Read as `0' OCFAR<4:0>: Assign Output Capture A (OCFA) to the corresponding RPn pin bits 11111 = Input tied to VSS 01111 = Input tied to RP15 * * * 00001 = Input tied to RP1 00000 = Input tied to RP0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 111 dsPIC33FJ12GP201/202 REGISTER 9-7: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12-8 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- R/W-1 R/W-1 R/W-1 U1RXR<4:0> bit 0 R/W-1 RPINR18: PERIPHERAL PIN SELECT INPUT REGISTER 18 U-0 -- U-0 -- R/W-1 R/W-1 R/W-1 U1CTSR<4:0> bit 8 R/W-1 R/W-1 R/W-1 Unimplemented: Read as `0' U1CTSR<4:0>: Assign UART 1 Clear to Send (U1CTS) to the corresponding RPn pin bits 11111 = Input tied to VSS 01111 = Input tied to RP15 * * * 00001 = Input tied to RP1 00000 = Input tied to RP0 Unimplemented: Read as `0' U1RXR<4:0>: Assign UART 1 Receive (U1RX) to the corresponding RPn pin bits 11111 = Input tied to VSS 01111 = Input tied to RP15 * * * 00001 = Input tied to RP1 00000 = Input tied to RP0 bit 7-5 bit 4-0 DS70264B-page 112 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 9-8: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12-8 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- R/W-1 R/W-1 R/W-1 SDI1R<4:0> bit 0 R/W-1 RPINR20: PERIPHERAL PIN SELECT INPUT REGISTER 20 U-0 -- U-0 -- R/W-1 R/W-1 R/W-1 SCK1R<4:0> bit 8 R/W-1 R/W-1 R/W-1 Unimplemented: Read as `0' SCK1R<4:0>: Assign SPI 1 Clock Input (SCK1IN) to the corresponding RPn pin bits 11111 = Input tied to VSS 01111 = Input tied to RP15 * * * 00001 = Input tied to RP1 00000 = Input tied to RP0 Unimplemented: Read as `0' SDI1R<4:0>: Assign SPI 1 Data Input (SDI1) to the corresponding RPn pin bits 11111 = Input tied to VSS 01111 = Input tied to RP15 * * * 00001 = Input tied to RP1 00000 = Input tied to RP0 bit 7-5 bit 4-0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 113 dsPIC33FJ12GP201/202 REGISTER 9-9: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-5 bit 4-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- R/W-1 R/W-1 R/W-1 SS1R<4:0> bit 0 R/W-1 RPINR21: PERIPHERAL PIN SELECT INPUT REGISTER 21 U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 R/W-1 Unimplemented: Read as `0' SS1R<4:0>: Assign SPI1 Slave Select Input (SS1IN) to the Corresponding RPn pin bits 11111 = Input tied to VSS 01111 = Input tied to RP15 * * * 00001 = Input tied to RP1 00000 = Input tied to RP0 DS70264B-page 114 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 9-10: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12-8 bit 7-5 bit 4-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP0R<4:0> bit 0 R/W-0 RPOR0: PERIPHERAL PIN SELECT OUTPUT REGISTERS 0 U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP1R<4:0> bit 8 R/W-0 R/W-0 R/W-0 Unimplemented: Read as `0' RP1R<4:0>: Peripheral Output Function is Assigned to RP1 Output Pin bits (see Table 9-2 for peripheral function numbers) Unimplemented: Read as `0' RP0R<4:0>: Peripheral Output Function is Assigned to RP0 Output Pin bits (see Table 9-2 for peripheral function numbers) REGISTER 9-11: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12-8 bit 7-5 bit 4-0 RPOR1: PERIPHERAL PIN SELECT OUTPUT REGISTERS 1 U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP3R<4:0> bit 8 U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP2R<4:0> bit 0 R/W-0 R/W-0 R/W-0 R/W-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown Unimplemented: Read as `0' RP3R<4:0>: Peripheral Output Function is Assigned to RP3 Output Pin bits (see Table 9-2 for peripheral function numbers) Unimplemented: Read as `0' RP2R<4:0>: Peripheral Output Function is Assigned to RP2 Output Pin bits (see Table 9-2 for peripheral function numbers) (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 115 dsPIC33FJ12GP201/202 REGISTER 9-12: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12-8 bit 7-5 bit 4-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP4R<4:0> bit 0 R/W-0 RPOR2: PERIPHERAL PIN SELECT OUTPUT REGISTERS 2 U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP5R<4:0> bit 8 R/W-0 R/W-0 R/W-0 Unimplemented: Read as `0' RP5R<4:0>: Peripheral Output Function is Assigned to RP5 Output Pin bits (see Table 9-2 for peripheral function numbers) Unimplemented: Read as `0' RP4R<4:0>: Peripheral Output Function is Assigned to RP4 Output Pin bits (see Table 9-2 for peripheral function numbers) REGISTER 9-13: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12-8 bit 7-5 bit 4-0 RPOR3: PERIPHERAL PIN SELECT OUTPUT REGISTERS 3 U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP7R<4:0> bit 8 U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP6R<4:0> bit 0 R/W-0 R/W-0 R/W-0 R/W-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown Unimplemented: Read as `0' RP7R<4:0>: Peripheral Output Function is Assigned to RP7 Output Pin bits (see Table 9-2 for peripheral function numbers) Unimplemented: Read as `0' RP6R<4:0>: Peripheral Output Function is Assigned to RP6 Output Pin bits (see Table 9-2 for peripheral function numbers) DS70264B-page 116 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 9-14: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12-8 bit 7-5 bit 4-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP8R<4:0> bit 0 R/W-0 RPOR4: PERIPHERAL PIN SELECT OUTPUT REGISTERS 0 U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP9R<4:0> bit 8 R/W-0 R/W-0 R/W-0 Unimplemented: Read as `0' RP9R<4:0>: Peripheral Output Function is Assigned to RP9 Output Pin bits (see Table 9-2 for peripheral function numbers) Unimplemented: Read as `0' RP8R<4:0>: Peripheral Output Function is Assigned to RP8 Output Pin bits (see Table 9-2 for peripheral function numbers) REGISTER 9-15: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12-8 bit 7-5 bit 4-0 RPOR5: PERIPHERAL PIN SELECT OUTPUT REGISTERS 5 U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP11R<4:0> bit 8 U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP10R<4:0> bit 0 R/W-0 R/W-0 R/W-0 R/W-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown Unimplemented: Read as `0' RP11R<4:0>: Peripheral Output Function is Assigned to RP11 Output Pin bits (see Table 9-2 for peripheral function numbers) Unimplemented: Read as `0' RP10R<4:0>: Peripheral Output Function is Assigned to RP10 Output Pin bits (see Table 9-2 for peripheral function numbers) (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 117 dsPIC33FJ12GP201/202 REGISTER 9-16: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12-8 bit 7-5 bit 4-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP12R<4:0> bit 0 R/W-0 RPOR6: PERIPHERAL PIN SELECT OUTPUT REGISTERS 6 U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP13R<4:0> bit 8 R/W-0 R/W-0 R/W-0 Unimplemented: Read as `0' RP13R<4:0>: Peripheral Output Function is Assigned to RP13 Output Pin bits (see Table 9-2 for peripheral function numbers) Unimplemented: Read as `0' RP12R<4:0>: Peripheral Output Function is Assigned to RP12 Output Pin bits (see Table 9-2 for peripheral function numbers) REGISTER 9-17: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12-8 bit 7-5 bit 4-0 RPOR7: PERIPHERAL PIN SELECT OUTPUT REGISTERS 7 U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP15R<4:0> bit 8 U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 RP14R<4:0> bit 0 R/W-0 R/W-0 R/W-0 R/W-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown Unimplemented: Read as `0' RP15R<4:0>: Peripheral Output Function is Assigned to RP15 Output Pin bits (see Table 9-2 for peripheral function numbers) Unimplemented: Read as `0' RP14R<4:0>: Peripheral Output Function is Assigned to RP14 Output Pin bits (see Table 9-2 for peripheral function numbers) DS70264B-page 118 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 10.0 Note: TIMER1 This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. Figure 10-1 presents a block diagram of the 16-bit timer module. To configure Timer1 for operation: 1. 2. 3. 4. 5. 6. Set the TON bit (= 1) in the T1CON register. Select the timer prescaler ratio using the TCKPS<1:0> bits in the T1CON register. Set the Clock and Gating modes using the TCS and TGATE bits in the T1CON register. Set or clear the TSYNC bit in T1CON to select synchronous or asynchronous operation. Load the timer period value into the PR1 register. If interrupts are required, set the interrupt enable bit, T1IE. Use the priority bits, T1IP<2:0>, to set the interrupt priority. The Timer1 module is a 16-bit timer, which can serve as the time counter for the real-time clock, or operate as a free-running interval timer/counter. Timer1 can operate in three modes: * 16-bit Timer * 16-bit Synchronous Counter * 16-bit Asynchronous Counter Timer1 also supports these features: * Timer gate operation * Selectable prescaler settings * Timer operation during CPU Idle and Sleep modes * Interrupt on 16-bit Period register match or falling edge of external gate signal FIGURE 10-1: 16-BIT TIMER1 MODULE BLOCK DIAGRAM TCKPS<1:0> SOSCO/ T1CK SOSCEN SOSCI Gate Sync TCY TGATE 1 0 Reset TMR1 Q Q D CK 1x 01 00 TON 2 Prescaler 1, 8, 64, 256 TGATE TCS Set T1IF 0 1 Comparator TSYNC Sync Equal PR1 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 119 dsPIC33FJ12GP201/202 REGISTER 10-1: R/W-0 TON bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 TGATE R/W-0 R/W-0 U-0 -- R/W-0 TSYNC R/W-0 TCS U-0 -- bit 0 T1CON: TIMER1 CONTROL REGISTER U-0 -- R/W-0 TSIDL U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 TCKPS<1:0> TON: Timer1 On bit 1 = Starts 16-bit Timer1 0 = Stops 16-bit Timer1 Unimplemented: Read as `0' TSIDL: Stop in Idle Mode bit 1 = Discontinue module operation when device enters Idle mode 0 = Continue module operation in Idle mode Unimplemented: Read as `0' TGATE: Timer1 Gated Time Accumulation Enable bit When T1CS = 1: This bit is ignored. When T1CS = 0: 1 = Gated time accumulation enabled 0 = Gated time accumulation disabled TCKPS<1:0> Timer1 Input Clock Prescale Select bits 11 = 1:256 10 = 1:64 01 = 1:8 00 = 1:1 Unimplemented: Read as `0' TSYNC: Timer1 External Clock Input Synchronization Select bit When TCS = 1: 1 = Synchronize external clock input 0 = Do not synchronize external clock input When TCS = 0: This bit is ignored. TCS: Timer1 Clock Source Select bit 1 = External clock from pin T1CK (on the rising edge) 0 = Internal clock (FCY) Unimplemented: Read as `0' bit 14 bit 13 bit 12-7 bit 6 bit 5-4 bit 3 bit 2 bit 1 bit 0 DS70264B-page 120 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 11.0 Note: TIMER2/3 FEATURE This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. 11.1 1. 2. 3. 4. 32-bit Operation To configure the Timer2/3 feature for 32-bit operation: Set the corresponding T32 control bit. Select the prescaler ratio for Timer2 using the TCKPS<1:0> bits. Set the Clock and Gating modes using the corresponding TCS and TGATE bits. Load the timer period value. PR3 contains the most significant word of the value, while PR2 contains the least significant word. If interrupts are required, set the interrupt enable bit, T3IE. Use the priority bits T3IP<2:0> to set the interrupt priority. While Timer2 controls the timer, the interrupt appears as a Timer3 interrupt. Set the corresponding TON bit. The Timer2/3 feature has 32-bit timers that can also be configured as two independent 16-bit timers with selectable operating modes. As a 32-bit timer, the Timer2/3 feature permits operation in three modes: * Two Independent 16-bit timers (Timer2 and Timer3) with all 16-bit operating modes (except Asynchronous Counter mode) * Single 32-bit timer (Timer2/3) * Single 32-bit synchronous counter (Timer2/3) The Timer2/3 feature also supports: * * * * * Timer gate operation Selectable Prescaler Settings Timer operation during Idle and Sleep modes Interrupt on a 32-bit Period Register Match Time Base for Input Capture and Output Compare Modules (Timer2 and Timer3 only) * ADC1 Event Trigger (Timer2/3 only) Individually, all eight of the 16-bit timers can function as synchronous timers or counters. They also offer the features listed above, except for the event trigger. The operating modes and enabled features are determined by setting the appropriate bit(s) in the T2CON and T3CON registers. T2CON registers are shown in generic form in Register 11-1. T3CON registers are shown in Register 11-2. For 32-bit timer/counter operation, Timer2 is the least significant word, and Timer3 is the most significant word of the 32-bit timers. Note: For 32-bit operation, T3CON control bits are ignored. Only T2CON control bit is used for setup and control. Timer2 clock and gate inputs are used for the 32-bit timer modules, but an interrupt is generated with the Timer3 interrupt flags. 5. 6. The timer value at any point is stored in the register pair TMR3:TMR2. TMR3 always contains the most significant word of the count, while TMR2 contains the least significant word. To configure any of the timers for individual 16-bit operation: 1. 2. 3. 4. 5. Clear the T32 bit corresponding to that timer. Select the timer prescaler ratio using the TCKPS<1:0> bits. Set the Clock and Gating modes using the TCS and TGATE bits. Load the timer period value into the PRx register. If interrupts are required, set the interrupt enable bit, TxIE. Use the priority bits, TxIP<2:0>, to set the interrupt priority. Set the TON bit. 6. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 121 dsPIC33FJ12GP201/202 FIGURE 11-1: TIMER2/3 (32-BIT) BLOCK DIAGRAM(1) TCKPS<1:0> 2 Prescaler 1, 8, 64, 256 T2CK Gate Sync TCY TGATE 1x 01 00 TON TGATE TCS Q Q D CK Set T3IF 1 0 PR3 PR2 ADC Event Trigger(2) Equal MSb Reset 16 Comparator LSb TMR3 TMR2 Sync Read TMR2 Write TMR2 16 TMR3HLD 16 Data Bus<15:0> 16 Note 1: 2: The 32-bit timer control bit, T32, must be set for 32-bit timer/counter operation. All control bits are respective to the T2CON register. The ADC event trigger is available only on Timer2/3. DS70264B-page 122 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 FIGURE 11-2: TIMER2 (16-BIT) BLOCK DIAGRAM TCKPS<1:0> 2 Prescaler 1, 8, 64, 256 T2CK Gate Sync 1x 01 00 TCY 1 Q Q Reset D CK TON TGATE TCS TGATE Set T2IF 0 TMR2 Sync Equal Comparator PR2 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 123 dsPIC33FJ12GP201/202 REGISTER 11-1: R/W-0 TON bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 TGATE R/W-0 R/W-0 R/W-0 T32(1) U-0 -- R/W-0 TCS U-0 -- bit 0 T2CON CONTROL REGISTER U-0 -- R/W-0 TSIDL U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 TCKPS<1:0> TON: Timer2 On bit When T32 = 1: 1 = Starts 32-bit Timer2/3 0 = Stops 32-bit Timer2/3 When T32 = 0: 1 = Starts 16-bit Timer2 0 = Stops 16-bit Timer2 Unimplemented: Read as `0' TSIDL: Stop in Idle Mode bit 1 = Discontinue module operation when device enters Idle mode 0 = Continue module operation in Idle mode Unimplemented: Read as `0' TGATE: Timer2 Gated Time Accumulation Enable bit When TCS = 1: This bit is ignored. When TCS = 0: 1 = Gated time accumulation enabled 0 = Gated time accumulation disabled TCKPS<1:0>: Timer2 Input Clock Prescale Select bits 11 = 1:256 10 = 1:64 01 = 1:8 00 = 1:1 T32: 32-bit Timer Mode Select bit(1) 1 = Timer2 and Timer3 form a single 32-bit timer 0 = Timer2 and Timer3 act as two 16-bit timers Unimplemented: Read as `0' TCS: Timer2 Clock Source Select bit 1 = External clock from pin T2CK (on the rising edge) 0 = Internal clock (FCY) Unimplemented: Read as `0' In 32-bit mode, T3CON control bits do not affect 32-bit timer operation. bit 14 bit 13 bit 12-7 bit 6 bit 5-4 bit 3 bit 2 bit 1 bit 0 Note 1: DS70264B-page 124 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 11-2: R/W-0 TON(1) bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 TGATE(1) R/W-0 R/W-0 U-0 -- U-0 -- R/W-0 TCS(1) U-0 -- bit 0 T3CON CONTROL REGISTER U-0 -- R/W-0 TSIDL(1) U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 TCKPS<1:0>(1) TON: Timer3 On bit(1) 1 = Starts 16-bit Timer3 0 = Stops 16-bit Timer3 Unimplemented: Read as `0' TSIDL: Stop in Idle Mode bit(1) 1 = Discontinue module operation when device enters Idle mode 0 = Continue module operation in Idle mode Unimplemented: Read as `0' TGATE: Timer3 Gated Time Accumulation Enable bit(1) When TCS = 1: This bit is ignored. When TCS = 0: 1 = Gated time accumulation enabled 0 = Gated time accumulation disabled TCKPS<1:0>: Timer3 Input Clock Prescale Select bits(1) 11 = 1:256 10 = 1:64 01 = 1:8 00 = 1:1 Unimplemented: Read as `0' TCS: Timer3 Clock Source Select bit(1) 1 = External clock from pin T3CK (on the rising edge) 0 = Internal clock (FCY) Unimplemented: Read as `0' When 32-bit operation is enabled (T2CON<3> = 1), these bits have no effect on Timer3 operation; all timer functions are set through T2CON. bit 14 bit 13 bit 12-7 bit 6 bit 5-4 bit 3-2 bit 1 bit 0 Note 1: (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 125 dsPIC33FJ12GP201/202 NOTES: DS70264B-page 126 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 12.0 Note: INPUT CAPTURE This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. * Capture timer value on every edge (rising and falling) * Prescaler Capture Event modes: - Capture timer value on every 4th rising edge of input at ICx pin -Capture timer value on every 16th rising edge of input at ICx pin Each input capture channel can select one of two 16-bit timers (Timer2 or Timer3) for the time base. The selected timer can use either an internal or external clock. Other operational features include: * Device wake-up from capture pin during CPU Sleep and Idle modes * Interrupt on input capture event * 4-word FIFO buffer for capture values - Interrupt optionally generated after 1, 2, 3 or 4 buffer locations are filled * Use of input capture to provide additional sources of external interrupts The input capture module is useful in applications requiring frequency (period) and pulse measurement. The dsPIC33FJ12GP201/202 devices support up to eight input capture channels. The input capture module captures the 16-bit value of the selected Time Base register when an event occurs at the ICx pin. The events that cause a capture event are listed below in three categories: * Simple Capture Event modes: - Capture timer value on every falling edge of input at ICx pin - Capture timer value on every rising edge of input at ICx pin FIGURE 12-1: INPUT CAPTURE BLOCK DIAGRAM From 16-bit Timers TMR2 TMR3 16 16 ICTMR (ICxCON<7>) 1 Prescaler Counter (1, 4, 16) ICx Pin 3 Edge Detection Logic and Clock Synchronizer ICM<2:0> (ICxCON<2:0>) Mode Select ICOV, ICBNE (ICxCON<4:3>) FIFO R/W Logic 0 ICxBUF ICxI<1:0> ICxCON Interrupt Logic System Bus Set Flag ICxIF (in IFSn Register) Note: An `x' in a signal, register or bit name denotes the number of the capture channel. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 127 FIFO dsPIC33FJ12GP201/202 12.1 Input Capture Registers ICxCON: INPUT CAPTURE x CONTROL REGISTER U-0 -- R/W-0 ICSIDL U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 R/W-0 R/W-0 R-0, HC ICOV R-0, HC ICBNE R/W-0 R/W-0 ICM<2:0> bit 0 R/W-0 U-0 -- bit 15 R/W-0 ICTMR bit 7 Legend: R = Readable bit -n = Value at POR bit 15-14 bit 13 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown REGISTER 12-1: ICI<1:0> Unimplemented: Read as `0' ICSIDL: Input Capture Module Stop in Idle Control bit 1 = Input capture module will halt in CPU Idle mode 0 = Input capture module will continue to operate in CPU Idle mode Unimplemented: Read as `0' ICTMR: Input Capture Timer Select bits 1 = TMR2 contents are captured on capture event 0 = TMR3 contents are captured on capture event ICI<1:0>: Select Number of Captures per Interrupt bits 11 = Interrupt on every fourth capture event 10 = Interrupt on every third capture event 01 = Interrupt on every second capture event 00 = Interrupt on every capture event ICOV: Input Capture Overflow Status Flag bit (read-only) 1 = Input capture overflow occurred 0 = No input capture overflow occurred ICBNE: Input Capture Buffer Empty Status bit (read-only) 1 = Input capture buffer is not empty, at least one more capture value can be read 0 = Input capture buffer is empty ICM<2:0>: Input Capture Mode Select bits 111 =Input capture functions as interrupt pin only when device is in Sleep or Idle mode (Rising edge detect only, all other control bits are not applicable.) 110 = Unused (module disabled) 101 = Capture mode, every 16th rising edge 100 = Capture mode, every 4th rising edge 011 = Capture mode, every rising edge 010 = Capture mode, every falling edge 001 = Capture mode, every edge (rising and falling) (ICI<1:0> bits do not control interrupt generation for this mode.) 000 =Input capture module turned off bit 12-8 bit 7 bit 6-5 bit 4 bit 3 bit 2-0 DS70264B-page 128 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 13.0 Note: OUTPUT COMPARE This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. 8. To initiate another single pulse output, change the Timer and Compare register settings, if needed, and then issue a write to set the OCM bits to `100'. Disabling and re-enabling the timer, and clearing the TMRy register, are not required, but may be advantageous for defining a pulse from a known event time boundary. The output compare module does not have to be disabled after the falling edge of the output pulse. Another pulse can be initiated by rewriting the value of the OCxCON register. 13.1 Setup for Single Output Pulse Generation 13.2 Setup for Continuous Output Pulse Generation When the OCM control bits (OCxCON<2:0>) are set to `100', the selected output compare channel initializes the OCx pin to the low state and generates a single output pulse. To generate a single output pulse, the following steps are required. These steps assume timer source is initially turned off but this is not a requirement for the module operation. 1. Determine the instruction clock cycle time. Take into account the frequency of the external clock to the timer source (if one is used) and the timer prescaler settings. 2. Calculate time to the rising edge of the output pulse relative to the TMRy start value (0000h). 3. Calculate the time to the falling edge of the pulse based on the desired pulse width and the time to the rising edge of the pulse. 4. Write the value computed in step 2 into the Output Compare register, OCxR, and the value computed in step 3 into the Output Compare Secondary register, OCxRS. 5. Set Timer Period register, PRy, to a value equal to or greater than value in OCxRS, the Output Compare Secondary register. 6. Set the OCM bits to `100' and the OCTSEL (OCxCON<3>) bit to the desired timer source. The OCx pin state will now be driven low. 7. Set the TON (TyCON<15>) bit to `1', which enables the compare time base to count. Upon the first match between TMRy and OCxR, the OCx pin will be driven high. When the incrementing timer, TMRy, matches the Output Compare Secondary register, OCxRS, the second and trailing edge (high-to-low) of the pulse is driven onto the OCx pin. No additional pulses are driven onto the OCx pin and it remains at low. As a result of the second compare match event, the OCxIF interrupt flag bit is set. This will result in an interrupt if it is enabled by setting the OCxIE bit. For further information on peripheral interrupts, refer to Section 6.0 "Interrupt Controller". When the OCM control bits (OCxCON<2:0>) are set to `101', the selected output compare channel initializes the OCx pin to the low state and generates output pulses on each and every compare match event. To configure the module for generation of a continuous stream of output pulses, the following steps are required. These steps assume timer source is initially turned off but this is not a requirement for the module operation. 1. Determine the instruction clock cycle time. Take into account the frequency of the external clock to the timer source (if one is used) and the timer prescaler settings. 2. Calculate time to the rising edge of the output pulse relative to the TMRy start value (0000h). 3. Calculate the time to the falling edge of the pulse, based on the desired pulse width and the time to the rising edge of the pulse. 4. Write the values computed in step 2 into the Output Compare register, OCxR, and value computed in step 3 into the Output Compare Secondary register, OCxRS. 5. Set Timer Period register, PRy, to a value equal to or greater than value in OCxRS, the Output Compare Secondary Register. 6. Set the OCM bits to `101' and the OCTSEL bit to the desired timer source. The OCx pin state will now be driven low. 7. Enable the compare time base by setting the TON (TyCON<15>) bit to `1'. Upon the first match between TMRy and OCxR, the OCx pin will be driven high. When the compare time base, TMRy, matches the Output Compare Secondary register, OCxRS, the second and trailing edge (high-to-low) of the pulse is driven onto the OCx pin. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 129 dsPIC33FJ12GP201/202 8. As a result of the second compare match event, the OCxIF interrupt flag bit is set. When the compare time base and the value in its respective Timer Period register match, the TMRy register resets to 0x0000 and resumes counting. 9. Steps 8 through 11 are repeated and a continuous stream of pulses is generated, indefinitely. The OCxIF flag is set on each OCxRS-TMRy compare match event. 13.3.1 PWM PERIOD The PWM period is specified by writing to PRy, the Timer Period register. The PWM period can be calculated using Equation 13-1: EQUATION 13-1: CALCULATING THE PWM PERIOD 13.3 Pulse-Width Modulation Mode PWM Period = [(PRy) + 1] * TCY * (Timer Prescale Value) where: PWM Frequency = 1/[PWM Period] Note: A PRy value of N will produce a PWM period of N + 1 time base count cycles. For example, a value of 7 written into the PRy register will yield a period consisting of eight time base cycles. Use the following steps when configuring the output compare module for PWM operation: 1. 2. 3. 4. Set the PWM period by writing to the selected Timer Period register (PRy). Set the PWM duty cycle by writing to the OCxRS register. Write the OxCR register with the initial duty cycle. Enable interrupts, if required, for the timer and output compare modules. The output compare interrupt is required for PWM Fault pin utilization. Configure the output compare module for one of two PWM operation modes by writing to the Output Compare Mode bits, OCM<2:0> and (OCxCON<2:0>). 13.3.2 PWM DUTY CYCLE 5. Set the TMRy prescale value and enable the time base by setting TON = 1 (TxCON<15>) Specify the PWM duty cycle is specified by writing to the OCxRS register. The OCxRS register can be written to at any time, but the duty cycle value is not latched into OCxR until a match between PRy and TMRy occurs (i.e., the period is complete). This provides a double buffer for the PWM duty cycle and is essential for glitchless PWM operation. In the PWM mode, OCxR is a read-only register. Some important boundary parameters of the PWM duty cycle include: * If the Output Compare register, OCxR, is loaded with 0000h, the OCx pin will remain low (0% duty cycle). * If OCxR is greater than PRy (Timer Period register), the pin will remain high (100% duty cycle). * If OCxR is equal to PRy, the OCx pin will be low for one time base count value and high for all other count values. See Example 13-1 for PWM mode timing details. Table 13-1 shows example PWM frequencies and resolutions for a device operating at 10 MIPS. Note: The OCxR register should be initialized before the output compare module is first enabled. The OCxR register becomes a read-only duty cycle register when the module is operated in the PWM modes. The value held in OCxR will become the PWM duty cycle for the first PWM period. The contents of the Output Compare Secondary register, OCxRS, will not be transferred into OCxR until a time base period match occurs. EQUATION 13-2: CALCULATION FOR MAXIMUM PWM RESOLUTION log10 Maximum PWM Resolution (bits) = FCY ( FPWM ) bits log10(2) DS70264B-page 130 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 EXAMPLE 13-1: 1. PWM PERIOD AND DUTY CYCLE CALCULATIONS 2. Find the Timer Period register value for a desired PWM frequency that is 52.08 kHz, where FCY = 16 MHz and a Timer2 prescaler setting of 1:1. TCY = 62.5 ns PWM Period = 1/PWM Frequency = 1/52.08 kHz = 19.2 ms PWM Period = (PR2 + 1) * TCY * (Timer2 Prescale Value) 19.2 ms = (PR2 + 1) * 62.5 ns * 1 PR2 = 306 Find the maximum resolution of the duty cycle that can be used with a 52.08 kHz frequency and a 32 MHz device clock rate: PWM Resolution = log10 (FCY/FPWM)/log102) bits = (log10 (16 MHz/52.08 kHz)/log102) bits = 8.3 bits TABLE 13-1: EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 4 MIPS (FCY = 4 MHz) 7.6 Hz 8 FFFFh 16 61 Hz 1 FFFFh 16 122 Hz 1 7FFFh 15 977 Hz 1 0FFFh 12 3.9 kHz 1 03FFh 10 31.3 kHz 1 007Fh 7 125 kHz 1 001Fh 5 PWM Frequency Timer Prescaler Ratio Period Register Value Resolution (bits) TABLE 13-2: EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 16 MIPS (FCY = 16 MHz) 30.5 Hz 8 FFFFh 16 244 Hz 1 FFFFh 16 488 Hz 1 7FFFh 15 3.9 kHz 1 0FFFh 12 15.6 kHz 1 03FFh 10 125 kHz 1 007Fh 7 500 kHz 1 001Fh 5 PWM Frequency Timer Prescaler Ratio Period Register Value Resolution (bits) TABLE 13-3: EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 40 MIPS (FCY = 40 MHz) 76 Hz 8 FFFFh 16 610 Hz 1 FFFFh 16 1.22 Hz 1 7FFFh 15 9.77 kHz 1 0FFFh 12 39 kHz 1 03FFh 10 313 kHz 1 007Fh 7 1.25 MHz 1 001Fh 5 PWM Frequency Timer Prescaler Ratio Period Register Value Resolution (bits) (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 131 dsPIC33FJ12GP201/202 FIGURE 13-1: OUTPUT COMPARE MODULE BLOCK DIAGRAM Set Flag bit OCxIF(1) OCxRS(1) OCxR(1) Output Logic 3 SQ R Output Enable OCx(1) Comparator 0 16 1 16 OCTSEL 0 1 OCM2:OCM0 Mode Select OCFA(2) TMR register inputs from time bases(3) Period match signals from time bases(3) Note 1: Where `x' is shown, reference is made to the registers associated with the respective output compare channels 1 through 8. 2: OCFA pin controls OC1-OC2 channels. 3: TMR2/TMR3 can be selected via OCTSEL(OCxOCN<3>) bit. DS70264B-page 132 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 13.4 Output Compare Register OCxCON: OUTPUT COMPARE x CONTROL REGISTER U-0 -- R/W-0 OCSIDL U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 U-0 -- U-0 -- R-0 HC OCFLT R/W-0 OCTSEL R/W-0 R/W-0 OCM<2:0> bit 0 HC = Cleared in Hardware W = Writable bit `1' = Bit is set HS = Set in Hardware U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 REGISTER 13-1: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-14 bit 13 Unimplemented: Read as `0' OCSIDL: Stop Output Compare in Idle Mode Control bit 1 = Output Compare x will halt in CPU Idle mode 0 = Output Compare x will continue to operate in CPU Idle mode Unimplemented: Read as `0' OCFLT: PWM Fault Condition Status bit 1 = PWM Fault condition has occurred (cleared in hardware only) 0 = No PWM Fault condition has occurred (This bit is only used when OCM<2:0> = 111.) OCTSEL: Output Compare Timer Select bit 1 = Timer3 is the clock source for Compare x 0 = Timer2 is the clock source for Compare x OCM<2:0>: Output Compare Mode Select bits 111 = PWM mode on OCx, Fault pin enabled 110 = PWM mode on OCx, Fault pin disabled 101 = Initialize OCx pin low, generate continuous output pulses on OCx pin 100 = Initialize OCx pin low, generate single output pulse on OCx pin 011 = Compare event toggles OCx pin 010 = Initialize OCx pin high, compare event forces OCx pin low 001 = Initialize OCx pin low, compare event forces OCx pin high 000 = Output compare channel is disabled bit 12-5 bit 4 bit 3 bit 2-0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 133 dsPIC33FJ12GP201/202 NOTES: DS70264B-page 134 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 14.0 Note: SERIAL PERIPHERAL INTERFACE (SPI) This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. 14.3 Transmit Operations Transmit writes are also double-buffered. The user application writes to SPIxBUF. When the Master or Slave transfer is completed, the contents of the shift register (SPIxSR) are moved to the receive buffer. If any transmit data has been written to the buffer register, the contents of the transmit buffer are moved to SPIxSR. The received data is thus placed in SPIxBUF and the transmit data in SPIxSR is ready for the next transfer. Note: Both the transmit buffer (SPIxTXB) and the receive buffer (SPIxRXB) are mapped to the same register address, SPIxBUF. Do not perform read-modify-write operations (such as bit-oriented instructions) on the SPIxBUF register. The Serial Peripheral Interface (SPI) module is a synchronous serial interface useful for communicating with other peripheral or microcontroller devices. These peripheral devices can be serial EEPROMs, shift registers, display drivers, analog-to-digital (A/D) converters, etc. The SPI module is compatible with SPI and SIOP from Motorola(R). Each SPI module consists of a 16-bit shift register, SPIxSR (where x = 1 or 2), used for shifting data in and out, and a buffer register, SPIxBUF. A control register, SPIxCON, configures the module. Additionally, a status register, SPIxSTAT, indicates status conditions. The serial interface consists of 4 pins: * * * * SDIx (serial data input) SDOx (serial data output) SCKx (shift clock input or output) SSx (active low slave select). 14.4 SPI Setup To set up the SPI module for the Master mode of operation: 1. If using interrupts: a) Clear the SPIxIF bit in the respective IFSn register. b) Set the SPIxIE bit in the respective IECn register. c) Write the SPIxIP bits in the respective IPCn register to set the interrupt priority. Write the desired settings to the SPIxCON register with MSTEN (SPIxCON1<5>) = 1. Clear the SPIROV bit (SPIxSTAT<6>). Enable SPI operation by setting the SPIEN bit (SPIxSTAT<15>). Write the data to be transmitted to the SPIxBUF register. Transmission (and reception) will start as soon as data is written to the SPIxBUF register. Clear the SPIxBUF register. If using interrupts: a) Clear the SPIxIF bit in the respective IFSn register. b) Set the SPIxIE bit in the respective IECn register. c) Write the SPIxIP bits in the respective IPCn register to set the interrupt priority. Write the desired settings to the SPIxCON1 and SPIxCON2 registers with MSTEN (SPIxCON1<5>) = 0. Clear the SMP bit. If the CKE bit is set, then set the SSEN bit (SPIxCON1<7>) to enable the SSx pin. Clear the SPIROV bit (SPIxSTAT<6>). Enable SPI operation by setting the SPIEN bit (SPIxSTAT<15>). 2. 3. 4. 5. In Master mode operation, SCK is a clock output. In Slave mode, it is a clock input. 14.1 Interrupts A series of 8 or 16 clock pulses shift out bits from the SPIxSR to SDOx pin and simultaneously shift in data from the SDIx pin. An interrupt is generated when the transfer is complete and the corresponding interrupt flag bit (SPI1IF) is set. This interrupt can be disabled through an interrupt enable bit (SPI1IE). To set up the SPI module for the Slave mode of operation: 1. 2. 14.2 Receive Operations The receive operation is double-buffered. When a complete byte is received, it is transferred from SPIxSR to SPIxBUF. If the receive buffer is full when new data is being transferred from SPIxSR to SPIxBUF, the module sets the SPIROV bit, indicating an overflow condition. The transfer of the data from SPIxSR to SPIxBUF is not completed, and the new data is lost. The module will not respond to SCL transitions while SPIROV is `1', effectively disabling the module until SPIxBUF is read by user software. 3. 4. 5. 6. 7. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 135 dsPIC33FJ12GP201/202 The SPI module generates an interrupt indicating completion of a byte or word transfer, as well as a separate interrupt for all SPI error conditions. FIGURE 14-1: SCKx SPI MODULE BLOCK DIAGRAM 1:1 to 1:8 Secondary Prescaler Sync Control Control Clock Shift Control Select Edge 1:1/4/16/64 Primary Prescaler FCY SSx SPIxCON1<1:0> SPIxCON1<4:2> Enable Master Clock SDOx SDIx bit 0 SPIxSR Transfer Transfer SPIxRXB SPIxTXB SPIxBUF Read SPIxBUF Write SPIxBUF 16 Internal Data Bus DS70264B-page 136 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 FIGURE 14-2: SPI MASTER/SLAVE CONNECTION PROCESSOR 1 (SPI Master) PROCESSOR 2 (SPI Slave) SDOx SDIx Serial Receive Buffer (SPIxRXB) Serial Receive Buffer (SPIxRXB) Shift Register (SPIxSR) MSb LSb SDIx SDOx MSb Shift Register (SPIxSR) LSb Serial Transmit Buffer (SPIxTXB) Serial Transmit Buffer (SPIxTXB) SPI Buffer (SPIxBUF)(2) SCKx Serial Clock SCKx SSx(1) SPI Buffer (SPIxBUF)(2) (MSTEN (SPIxCON1<5>) = 1) Note 1: 2: (SSEN (SPIxCON1<7>) = 1 and MSTEN (SPIxCON1<5>) = 0) Using the SSx pin in Slave mode of operation is optional. User application must write transmit data to read received data from SPIxBUF. The SPIxTXB and SPIxRXB registers are memory mapped to SPIxBUF. FIGURE 14-3: SPI MASTER, FRAME MASTER CONNECTION DIAGRAM dsPIC33F SDOx SDIx PROCESSOR 2 SDIx SCKx SSx Serial Clock SDOx SCKx SSx Frame Sync Pulse FIGURE 14-4: SPI MASTER, FRAME SLAVE CONNECTION DIAGRAM dsPIC33F PROCESSOR 2 SDOx SDIx SCKx SSx Serial Clock SDIx SDOx SCKx SSx Frame Sync Pulse (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 137 dsPIC33FJ12GP201/202 FIGURE 14-5: SPI SLAVE, FRAME MASTER CONNECTION DIAGRAM dsPIC33F SDOx SDIx PROCESSOR 2 SDIx SCKx SSx Serial Clock SDOx SCKx SSx Frame Sync Pulse FIGURE 14-6: SPI SLAVE, FRAME SLAVE CONNECTION DIAGRAM dsPIC33F SDOx SDIx PROCESSOR 2 SDIx SCKx SSx Serial Clock SDOx SCKx SSx Frame Sync Pulse EQUATION 14-1: RELATIONSHIP BETWEEN DEVICE AND SPI CLOCK SPEED FSCK = FCY Primary Prescaler * Secondary Prescaler TABLE 14-1: SAMPLE SCKx FREQUENCIES FCY = 40 MHz Secondary Prescaler Settings 1:1 1:1 4:1 16:1 64:1 FCY = 5 MHz Invalid 10000 2500 625 2:1 Invalid 5000 1250 312.5 4:1 10000 2500 625 156.25 6:1 6666.67 1666.67 416.67 104.17 8:1 5000 1250 312.50 78.125 Primary Prescaler Settings Primary Prescaler Settings 1:1 4:1 16:1 64:1 5000 1250 313 78 2500 625 156 39 1250 313 78 20 833 208 52 13 625 156 39 10 Note: SCKx frequencies shown in kHz. DS70264B-page 138 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 14-1: R/W-0 SPIEN bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15 C = Clearable bit W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/C-0 SPIROV U-0 -- U-0 -- U-0 -- U-0 -- R-0 SPITBF R-0 SPIRBF bit 0 SPIxSTAT: SPIx STATUS AND CONTROL REGISTER U-0 -- R/W-0 SPISIDL U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 SPIEN: SPIx Enable bit 1 = Enables module and configures SCKx, SDOx, SDIx and SSx as serial port pins 0 = Disables module Unimplemented: Read as `0' SPISIDL: Stop in Idle Mode bit 1 = Discontinue module operation when device enters Idle mode 0 = Continue module operation in Idle mode Unimplemented: Read as `0' SPIROV: Receive Overflow Flag bit 1 = A new byte/word is completely received and discarded. The user software has not read the previous data in the SPIxBUF register. 0 = No overflow has occurred. Unimplemented: Read as `0' SPITBF: SPIx Transmit Buffer Full Status bit 1 = Transmit not yet started, SPIxTXB is full 0 = Transmit started, SPIxTXB is empty Automatically set in hardware when CPU writes SPIxBUF location, loading SPIxTXB Automatically cleared in hardware when SPIx module transfers data from SPIxTXB to SPIxSR SPIRBF: SPIx Receive Buffer Full Status bit 1 = Receive complete, SPIxRXB is full 0 = Receive is not complete, SPIxRXB is empty Automatically set in hardware when SPIx transfers data from SPIxSR to SPIxRXB Automatically cleared in hardware when core reads SPIxBUF location, reading SPIxRXB bit 14 bit 13 bit 12-7 bit 6 bit 5-2 bit 1 bit 0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 139 dsPIC33FJ12GP201/202 REGISTER 14-2: U-0 -- bit 15 R/W-0 SSEN bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 bit 12 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 CKP R/W-0 MSTEN R/W-0 R/W-0 SPRE<2:0> R/W-0 R/W-0 SPIXCON1: SPIx CONTROL REGISTER 1 U-0 -- U-0 -- R/W-0 DISSCK R/W-0 DISSDO R/W-0 MODE16 R/W-0 SMP R/W-0 CKE(1) bit 8 R/W-0 bit 0 PPRE<1:0> Unimplemented: Read as `0' DISSCK: Disable SCKx pin bit (SPI Master modes only) 1 = Internal SPI clock is disabled, pin functions as I/O 0 = Internal SPI clock is enabled DISSDO: Disable SDOx pin bit 1 = SDOx pin is not used by module; pin functions as I/O 0 = SDOx pin is controlled by the module MODE16: Word/Byte Communication Select bit 1 = Communication is word-wide (16 bits) 0 = Communication is byte-wide (8 bits) SMP: SPIx Data Input Sample Phase bit Master mode: 1 = Input data sampled at end of data output time 0 = Input data sampled at middle of data output time Slave mode: SMP must be cleared when SPIx is used in Slave mode. CKE: SPIx Clock Edge Select bit(1) 1 = Serial output data changes on transition from active clock state to Idle clock state (see bit 6) 0 = Serial output data changes on transition from Idle clock state to active clock state (see bit 6) SSEN: Slave Select Enable bit (Slave mode) 1 = SSx pin used for Slave mode 0 = SSx pin not used by module. Pin controlled by port function. CKP: Clock Polarity Select bit 1 = Idle state for clock is a high level; active state is a low level 0 = Idle state for clock is a low level; active state is a high level MSTEN: Master Mode Enable bit 1 = Master mode 0 = Slave mode The CKE bit is not used in the Framed SPI modes. Program this bit to `0' for the Framed SPI modes (FRMEN = 1). bit 11 bit 10 bit 9 bit 8 bit 7 bit 6 bit 5 Note 1: DS70264B-page 140 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 14-2: bit 4-2 SPIXCON1: SPIx CONTROL REGISTER 1 (CONTINUED) SPRE<2:0>: Secondary Prescale bits (Master mode) 111 = Secondary prescale 1:1 110 = Secondary prescale 2:1 * * * 000 = Secondary prescale 8:1 PPRE<1:0>: Primary Prescale bits (Master mode) 11 = Primary prescale 1:1 10 = Primary prescale 4:1 01 = Primary prescale 16:1 00 = Primary prescale 64:1 The CKE bit is not used in the Framed SPI modes. Program this bit to `0' for the Framed SPI modes (FRMEN = 1). bit 1-0 Note 1: (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 141 dsPIC33FJ12GP201/202 REGISTER 14-3: R/W-0 FRMEN bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- R/W-0 FRMDLY U-0 -- bit 0 SPIxCON2: SPIx CONTROL REGISTER 2 R/W-0 R/W-0 FRMPOL U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- bit 8 SPIFSD FRMEN: Framed SPIx Support bit 1 = Framed SPIx support enabled (SSx pin used as frame sync pulse input/output) 0 = Framed SPIx support disabled SPIFSD: Frame Sync Pulse Direction Control bit 1 = Frame sync pulse input (slave) 0 = Frame sync pulse output (master) FRMPOL: Frame Sync Pulse Polarity bit 1 = Frame sync pulse is active-high 0 = Frame sync pulse is active-low Unimplemented: Read as `0' FRMDLY: Frame Sync Pulse Edge Select bit 1 = Frame sync pulse coincides with first bit clock 0 = Frame sync pulse precedes first bit clock Unimplemented: This bit must not be set to `1' by the user application. bit 14 bit 13 bit 12-2 bit 1 bit 0 DS70264B-page 142 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 15.0 Note: INTER-INTEGRATED CIRCUIT (I2C) This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. 15.2 I2C Registers I2CxCON and I2CxSTAT are control and status registers, respectively. The I2CxCON register is readable and writable. The lower six bits of I2CxSTAT are read-only. The remaining bits of the I2CSTAT are read/write. * I2CxRSR is the shift register used for shifting data * I2CxRCV is the receive buffer and the register to which data bytes are written, or from which data bytes are read * I2CxTRN is the transmit register to which bytes are written during a transmit operation * The I2CxADD register holds the slave address * A status bit, ADD10, indicates 10-bit Address mode * I2CxBRG acts as the Baud Rate Generator (BRG) reload value. In receive operations, I2CxRSR and I2CxRCV together form a double-buffered receiver. When I2CxRSR receives a complete byte, it is transferred to I2CxRCV, and an interrupt pulse is generated. The Inter-Integrated Circuit (I2C) module provides complete hardware support for both Slave and MultiMaster modes of the I2C serial communication standard, with a 16-bit interface. The I2C module has a 2-pin interface: * The SCLx pin is clock * The SDAx pin is data The I2C module offers the following key features: * I2C interface supporting both Master and Slave modes of operation * I2C Slave mode supports 7 and 10-bit address * I2C Master mode supports 7 and 10-bit address * I2C port allows bidirectional transfers between master and slaves * Serial clock synchronization for I2C port can be used as a handshake mechanism to suspend and resume serial transfer (SCLREL control) * I2C supports multi-master operation, detects bus collision and arbitrates accordingly 15.3 I2C Interrupts The I2C module generates two interrupt flags: * MI2CxIF (I2C Master Events Interrupt flag) * SI2CxIF (I2C Slave Events Interrupt flag) A separate interrupt is generated for all I2C error conditions. 15.4 Baud Rate Generator 15.1 Operating Modes The hardware fully implements all the master and slave functions of the I2C Standard and Fast mode specifications, as well as 7 and 10-bit addressing. The I2C module can operate either as a slave or a master on an I2C bus. The following types of I2C operation are supported: * * * I2C slave operation with 7-bit address I2C slave operation with 10-bit address I2C master operation with 7 or 10-bit address value for the Baud Rate Generator (BRG) is located in the I2CxBRG register. When the BRG is loaded with this value, the BRG counts down to zero and stops until another reload has taken place. If clock arbitration is taking place, for example, the BRG is reloaded when the SCLx pin is sampled high. As per the I2C standard, FSCL can be 100 kHz or 400 kHz. However, the user application can specify any baud rate up to 1 MHz. I2CxBRG values of `0' or `1' are illegal. In I2C Master mode, the reload EQUATION 15-1: I2CxBRG = SERIAL CLOCK RATE FCY ( FSCL - FCY -1 10,000,000 For details about the communication sequence in each of these modes, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. ) (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 143 dsPIC33FJ12GP201/202 FIGURE 15-1: I2CTM BLOCK DIAGRAM (X = 1) Internal Data Bus I2CxRCV Shift Clock I2CxRSR LSb SDAx Address Match Read SCLx Match Detect Write I2CxMSK Write Read I2CxADD Read Start and Stop Bit Detect Start and Stop Bit Generation Control Logic Write I2CxSTAT Read Write I2CxCON Read Collision Detect Acknowledge Generation Clock Stretching Write I2CxTRN LSb Shift Clock Reload Control Read Write I2CxBRG Read BRG Down Counter TCY/2 DS70264B-page 144 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 15.5 I2C Module Addresses 15.8 General Call Address Support The 10-bit I2CxADD register contains the Slave mode addresses. If the A10M bit (I2CxCON<10>) is `0', the address is interpreted by the module as a 7-bit address. When an address is received, it is compared to the 7 Least Significant bits of the I2CxADD register. If the A10M bit is `1', the address is assumed to be a 10-bit address. When an address is received, it is compared with the binary value, `11110 A9 A8' (where `A9' and `A8' are two Most Significant bits of I2CxADD). If that value matches, the next address will be compared with the Least Significant 8 bits of I2CxADD, as specified in the 10-bit addressing protocol. The general call address can address all devices. When this address is used, all devices should, in theory, respond with an Acknowledgement. The general call address is one of eight addresses reserved for specific purposes by the I2C protocol. It consists of all `0's with R_W = 0. The general call address is recognized when the General Call Enable (GCEN) bit is set (I2CxCON<7> = 1). When the interrupt is serviced, the source for the interrupt can be checked by reading the contents of the I2CxRCV to determine if the address was device-specific or a general call address. 15.9 Automatic Clock Stretch TABLE 15-1: 7-BIT I2CTM SLAVE ADDRESSES SUPPORTED BY dsPIC33FJ12GP201/202 General call address or Start byte Reserved Hs mode Master codes Valid 7-bit addresses Valid 10-bit addresses (lower 7 bits) Reserved In Slave modes, the module can synchronize buffer reads and write to the master device by clock stretching. 15.9.1 TRANSMIT CLOCK STRETCHING 0x00 0x01-0x03 0x04-0x07 0x08-0x77 0x78-0x7b 0x7c-0x7f Both 10-bit and 7-bit Transmit modes implement clock stretching by asserting the SCLREL bit after the falling edge of the ninth clock, if the TBF bit is cleared, indicating the buffer is empty. In Slave Transmit modes, clock stretching is always performed, irrespective of the STREN bit. The user's ISR must set the SCLREL bit before transmission is allowed to continue. By holding the SCLx line low, the user application has time to service the ISR and load the contents of the I2CxTRN before the master device can initiate another transmit sequence. 15.6 Slave Address Masking The I2CxMSK register (Register 15-3) designates address bit positions as "don't care" for both 7-bit and 10-bit Address modes. Setting a particular bit location (= 1) in the I2CxMSK register causes the slave module to respond, whether the corresponding address bit value is a `0' or `1'. For example, when I2CxMSK is set to `00100000', the Slave module will detect both addresses, `0000000' and `00100000'. To enable address masking, the IPMI (Intelligent Peripheral Management Interface) must be disabled by clearing the IPMIEN bit (I2CxCON<11>). 15.9.2 RECEIVE CLOCK STRETCHING The STREN bit in the I2CxCON register can be used to enable clock stretching in Slave Receive mode. When the STREN bit is set, the SCLx pin will be held low at the end of each data receive sequence. The user's ISR must set the SCLREL bit before reception is allowed to continue. By holding the SCLx line low, the user application has time to service the ISR and read the contents of the I2CxRCV before the master device can initiate another receive sequence. This prevents buffer overruns. 15.7 IPMI Support The control bit IPMIEN enables the module to support the Intelligent Peripheral Management Interface (IPMI). When this bit is set, the module accepts and acts upon all addresses. 15.10 Software Controlled Clock Stretching (STREN = 1) When the STREN bit is `1', the software can clear the SCLREL bit to allow software to control the clock stretching. If the STREN bit is `0', a software write to the SCLREL bit is disregarded and has no effect on the SCLREL bit. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 145 dsPIC33FJ12GP201/202 15.11 Slope Control The I C standard requires slope control on the SDAx and SCLx signals for Fast mode (400 kHz). The control bit, DISSLW, enables the user application to disable slew rate control if desired. It is necessary to disable the slew rate control for 1 MHz mode. 2 15.13 Multi-Master Communication, Bus Collision and Bus Arbitration Multi-Master mode support is achieved by bus arbitration. When the master outputs address/data bits onto the SDAx pin, arbitration takes place when the master outputs a `1' on SDAx by letting SDAx float high while another master asserts a `0'. When the SCLx pin floats high, data should be stable. If the expected data on SDAx is a `1' and the data sampled on the SDAx pin = 0, then a bus collision has taken place. The master will set the I2C master events interrupt flag and reset the master portion of the I2C port to its Idle state. 15.12 Clock Arbitration Clock arbitration occurs when the master deasserts the SCLx pin (SCLx allowed to float high) during any receive, transmit or Restart/Stop condition. When the SCLx pin is allowed to float high, the BRG is suspended from counting until the SCLx pin is actually sampled high. When the SCLx pin is sampled high, the BRG is reloaded with the contents of I2CxBRG and begins counting. This process ensures that the SCLx high time will always be at least one BRG rollover count in the event that the clock is held low by an external device. 15.14 Peripheral Pin Select Limitations The I2C module has limited peripheral pin select functionality. When the ACTI2C bit in the FPOR configuration register is set to `1`, the module uses the SDAx/ SCLx pins. If the ALTI2C bit is `0`, the module uses the ASDAx/ASCLx pins. DS70264B-page 146 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 15-1: R/W-0 I2CEN bit 15 R/W-0 GCEN bit 7 Legend: R = Readable bit -n = Value at POR bit 15 U = Unimplemented bit, read as `0' W = Writable bit `1' = Bit is set HS = Set in hardware `0' = Bit is cleared HC = Cleared in hardware x = Bit is unknown R/W-0 STREN R/W-0 ACKDT R/W-0 HC ACKEN R/W-0 HC RCEN R/W-0 HC PEN R/W-0 HC RSEN I2CxCON: I2Cx CONTROL REGISTER U-0 -- R/W-0 I2CSIDL R/W-1 HC SCLREL R/W-0 IPMIEN R/W-0 A10M R/W-0 DISSLW R/W-0 SMEN bit 8 R/W-0 HC SEN bit 0 I2CEN: I2Cx Enable bit 1 = Enables the I2Cx module and configures the SDAx and SCLx pins as serial port pins 0 = Disables the I2Cx module. All I2C pins are controlled by port functions Unimplemented: Read as `0' I2CSIDL: Stop in Idle Mode bit 1 = Discontinue module operation when device enters an Idle mode 0 = Continue module operation in Idle mode SCLREL: SCLx Release Control bit (when operating as I2C slave) 1 = Release SCLx clock 0 = Hold SCLx clock low (clock stretch) If STREN = 1: Bit is R/W (i.e., software can write `0' to initiate stretch and write `1' to release clock). Hardware clear at beginning of slave transmission. Hardware clear at end of slave reception. If STREN = 0: Bit is R/S (i.e., software can only write `1' to release clock). Hardware clear at beginning of slave transmission. IPMIEN: Intelligent Peripheral Management Interface (IPMI) Enable bit 1 = IPMI mode is enabled; all addresses Acknowledged 0 = IPMI mode disabled A10M: 10-bit Slave Address bit 1 = I2CxADD is a 10-bit slave address 0 = I2CxADD is a 7-bit slave address DISSLW: Disable Slew Rate Control bit 1 = Slew rate control disabled 0 = Slew rate control enabled SMEN: SMbus Input Levels bit 1 = Enable I/O pin thresholds compliant with SMbus specification 0 = Disable SMbus input thresholds GCEN: General Call Enable bit (when operating as I2C slave) 1 = Enable interrupt when a general call address is received in the I2CxRSR (module is enabled for reception) 0 = General call address disabled STREN: SCLx Clock Stretch Enable bit (when operating as I2C slave) Used in conjunction with SCLREL bit. 1 = Enable software or receive clock stretching 0 = Disable software or receive clock stretching bit 14 bit 13 bit 12 bit 11 bit 10 bit 9 bit 8 bit 7 bit 6 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 147 dsPIC33FJ12GP201/202 REGISTER 15-1: bit 5 I2CxCON: I2Cx CONTROL REGISTER (CONTINUED) ACKDT: Acknowledge Data bit (when operating as I2C master, applicable during master receive) Value that will be transmitted when the software initiates an Acknowledge sequence. 1 = Send NACK during Acknowledge 0 = Send ACK during Acknowledge ACKEN: Acknowledge Sequence Enable bit (when operating as I2C master, applicable during master receive) 1 = Initiate Acknowledge sequence on SDAx and SCLx pins and transmit ACKDT data bit. Hardware clear at end of master Acknowledge sequence 0 = Acknowledge sequence not in progress RCEN: Receive Enable bit (when operating as I2C master) 1 = Enables Receive mode for I2C. Hardware clear at end of eighth bit of master receive data byte 0 = Receive sequence not in progress PEN: Stop Condition Enable bit (when operating as I2C master) 1 = Initiate Stop condition on SDAx and SCLx pins. Hardware clear at end of master Stop sequence 0 = Stop condition not in progress RSEN: Repeated Start Condition Enable bit (when operating as I2C master) 1 = Initiate Repeated Start condition on SDAx and SCLx pins. Hardware clear at end of master Repeated Start sequence 0 = Repeated Start condition not in progress SEN: Start Condition Enable bit (when operating as I2C master) 1 = Initiate Start condition on SDAx and SCLx pins. Hardware clear at end of master Start sequence 0 = Start condition not in progress bit 4 bit 3 bit 2 bit 1 bit 0 DS70264B-page 148 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 15-2: R-0 HSC ACKSTAT bit 15 R/C-0 HS IWCOL bit 7 Legend: R = Readable bit -n = Value at POR bit 15 U = Unimplemented bit, read as `0' W = Writable bit `1' = Bit is set HS = Set in hardware `0' = Bit is cleared HSC = Hardware set/cleared x = Bit is unknown R/C-0 HS I2COV R-0 HSC D_A R/C-0 HSC P R/C-0 HSC S R-0 HSC R_W R-0 HSC RBF I2CxSTAT: I2Cx STATUS REGISTER U-0 -- U-0 -- U-0 -- R/C-0 HS BCL R-0 HSC GCSTAT R-0 HSC ADD10 bit 8 R-0 HSC TBF bit 0 R-0 HSC TRSTAT ACKSTAT: Acknowledge Status bit (when operating as I2C master, applicable to master transmit operation) 1 = NACK received from slave 0 = ACK received from slave Hardware set or clear at end of slave Acknowledge. TRSTAT: Transmit Status bit (when operating as I2C master, applicable to master transmit operation) 1 = Master transmit is in progress (8 bits + ACK) 0 = Master transmit is not in progress Hardware set at beginning of master transmission. Hardware clear at end of slave Acknowledge. Unimplemented: Read as `0' BCL: Master Bus Collision Detect bit 1 = A bus collision has been detected during a master operation 0 = No collision Hardware set at detection of bus collision. GCSTAT: General Call Status bit 1 = General call address was received 0 = General call address was not received Hardware set when address matches general call address. Hardware clear at Stop detection. ADD10: 10-bit Address Status bit 1 = 10-bit address was matched 0 = 10-bit address was not matched Hardware set at match of 2nd byte of matched 10-bit address. Hardware clear at Stop detection. IWCOL: Write Collision Detect bit 1 = An attempt to write the I2CxTRN register failed because the I2C module is busy 0 = No collision Hardware set at occurrence of write to I2CxTRN while busy (cleared by software). I2COV: Receive Overflow Flag bit 1 = A byte was received while the I2CxRCV register is still holding the previous byte 0 = No overflow Hardware set at attempt to transfer I2CxRSR to I2CxRCV (cleared by software). D_A: Data/Address bit (when operating as I2C slave) 1 = Indicates that the last byte received was data 0 = Indicates that the last byte received was device address Hardware clear at device address match. Hardware set by reception of slave byte. P: Stop bit 1 = Indicates that a Stop bit has been detected last 0 = Stop bit was not detected last Hardware set or clear when Start, Repeated Start or Stop detected. bit 14 bit 13-11 bit 10 bit 9 bit 8 bit 7 bit 6 bit 5 bit 4 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 149 dsPIC33FJ12GP201/202 REGISTER 15-2: bit 3 I2CxSTAT: I2Cx STATUS REGISTER (CONTINUED) S: Start bit 1 = Indicates that a Start (or Repeated Start) bit has been detected last 0 = Start bit was not detected last Hardware set or clear when Start, Repeated Start or Stop detected. R_W: Read/Write Information bit (when operating as I2C slave) 1 = Read - indicates data transfer is output from slave 0 = Write - indicates data transfer is input to slave Hardware set or clear after reception of I 2C device address byte. RBF: Receive Buffer Full Status bit 1 = Receive complete, I2CxRCV is full 0 = Receive not complete, I2CxRCV is empty Hardware set when I2CxRCV is written with received byte. Hardware clear when software reads I2CxRCV. TBF: Transmit Buffer Full Status bit 1 = Transmit in progress, I2CxTRN is full 0 = Transmit complete, I2CxTRN is empty Hardware set when software writes I2CxTRN. Hardware clear at completion of data transmission. bit 2 bit 1 bit 0 DS70264B-page 150 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 15-3: U-0 -- bit 15 R/W-0 AMSK7 bit 7 Legend: R = Readable bit -n = Value at POR bit 15-10 bit 9-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 AMSK6 R/W-0 AMSK5 R/W-0 AMSK4 R/W-0 AMSK3 R/W-0 AMSK2 R/W-0 AMSK1 I2CxMSK: I2Cx SLAVE MODE ADDRESS MASK REGISTER U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- R/W-0 AMSK9 R/W-0 AMSK8 bit 8 R/W-0 AMSK0 bit 0 Unimplemented: Read as `0' AMSKx: Mask for Address bit x Select bit 1 = Enable masking for bit x of incoming message address; bit match not required in this position 0 = Disable masking for bit x; bit match required in this position (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 151 dsPIC33FJ12GP201/202 NOTES: DS70264B-page 152 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 16.0 UNIVERSAL ASYNCHRONOUS RECEIVER TRANSMITTER (UART) This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. * Hardware Flow Control Option with UxCTS and UxRTS pins * Fully Integrated Baud Rate Generator with 16-bit prescaler * Baud rates ranging from 1 Mbps to 15 Mbps at 16 MIPS * 4-deep First-In First-Out (FIFO) Transmit Data Buffer * 4-Deep FIFO Receive Data Buffer * Parity, framing and buffer overrun error detection * Support for 9-bit mode with Address Detect (9th bit = 1) * Transmit and Receive interrupts * A separate interrupt for all UART error conditions * Loopback mode for diagnostic support * Support for Sync and Break characters * Support for automatic baud rate detection * IrDA encoder and decoder logic * 16x baud clock output for IrDA support A simplified block diagram of the UART module is shown in Figure 16-1. The UART module consists of these key hardware elements: * Baud Rate Generator * Asynchronous Transmitter * Asynchronous Receiver Note: The Universal Asynchronous Receiver Transmitter (UART) module is one of the serial I/O modules available in the dsPIC33FJ12GP201/202 device family. The UART is a full-duplex asynchronous system that can communicate with peripheral devices, such as personal computers, LIN, RS-232 and RS-485 interfaces. The module also supports a hardware flow control option with the UxCTS and UxRTS pins and also includes an IrDA(R) encoder and decoder. The primary features of the UART module are: * Full-Duplex, 8- or 9-bit Data Transmission through the UxTX and UxRX pins * Even, odd or no parity options (for 8-bit data) * One or two stop bits FIGURE 16-1: UART SIMPLIFIED BLOCK DIAGRAM Baud Rate Generator IrDA(R) BCLK Hardware Flow Control UxRTS UxCTS UART Receiver UxRX UART Transmitter UxTX (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 153 dsPIC33FJ12GP201/202 16.1 UART Baud Rate Generator The UART module includes a dedicated 16-bit BRG. The BRGx register controls the period of a free-running 16-bit timer. Equation 16-1 shows the formula for computation of the baud rate with BRGH = 0. Equation 16-2 shows the formula for computation of the baud rate with BRGH = 1. EQUATION 16-2: UART BAUD RATE WITH BRGH = 1 FCY 4 * (BRGx + 1) EQUATION 16-1: UART BAUD RATE WITH BRGH = 0 FCY 16 * (BRGx + 1) Note: Baud Rate = Baud Rate = BRGx = FCY -1 4 * Baud Rate BRGx = Note: FCY -1 16 * Baud Rate FCY denotes the instruction cycle clock frequency (FOSC/2). FCY denotes the instruction cycle clock frequency (FOSC/2). The maximum baud rate (BRGH = 1) possible is FCY/4 (for BRGx = 0), and the minimum baud rate possible is FCY/(4 * 65536). Writing a new value to the BRGx register causes the BRG timer to be reset (cleared). This ensures the BRG does not wait for a timer overflow before generating the new baud rate. Example 16-1 shows the calculation of the baud rate error for the following conditions: * FCY = 4 MHz * Desired Baud Rate = 9600 The maximum baud rate (BRGH = 0) possible is FCY/16 (for BRGx = 0), and the minimum baud rate possible is FCY/(16 * 65536). EXAMPLE 16-1: Desired Baud Rate BAUD RATE ERROR CALCULATION (BRGH = 0) = = = = = = = = = FCY/(16 (BRGx + 1)) ((FCY/Desired Baud Rate)/16) - 1 ((4000000/9600)/16) - 1 25 4000000/(16 (25 + 1)) 9615 (Calculated Baud Rate - Desired Baud Rate) Desired Baud Rate (9615 - 9600)/9600 0.16% Solving for BRGx Value: BRGx BRGx BRGx Calculated Baud Rate Error DS70264B-page 154 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 16.2 1. Transmitting in 8-bit Data Mode 16.5 1. 2. 2. 3. 4. Set up the UART: a) Write appropriate values for data, parity and Stop bits. b) Write appropriate baud rate value to the BRGx register. c) Set up transmit and receive interrupt enable and priority bits. Enable the UART. Set the UTXEN bit (causes a transmit interrupt). Write data byte to lower byte of UxTXREG word. The value will be immediately transferred to the Transmit Shift Register (TSR) and the serial bit stream will start shifting out with the next rising edge of the baud clock. Alternately, the data byte can be transferred while UTXEN = 0, and the user application can set UTXEN. This causes the serial bit stream to begin immediately, because the baud clock starts from a cleared state. Receiving in 8-bit or 9-bit Data Mode 3. 4. Set up the UART (as described in Section 16.2 "Transmitting in 8-bit Data Mode"). Enable the UART. A receive interrupt will be generated when one or more data characters have been received as per interrupt control bits, URXISEL<1:0>. Read the OERR bit to determine if an overrun error has occurred. The OERR bit must be reset in software. Read UxRXREG. The act of reading the UxRXREG character will move the next character to the top of the receive FIFO, including a new set of PERR and FERR values. 16.6 Flow Control Using UxCTS and UxRTS Pins A transmit interrupt will be generated as per interrupt control bits, UTXISEL<1:0>. UARTx Clear to Send (UxCTS) and Request to Send (UxRTS) are the two hardware controlled active-low pins associated with the UART module. The UEN<1:0> bits in the UxMODE register configure these pins. These two pins allow the UART to operate in Simplex and Flow Control modes. They are implemented to control the transmission and the reception between the Data Terminal Equipment (DTE). 16.3 1. 2. 3. 4. 5. Transmitting in 9-bit Data Mode Set up the UART (as described in Section 16.2 "Transmitting in 8-bit Data Mode"). Enable the UART. Set the UTXEN bit (causes a transmit interrupt). Write UxTXREG as a 16-bit value only. A word write to UxTXREG triggers the transfer of the 9-bit data to the TSR. The serial bit stream will start shifting out with the first rising edge of the baud clock. 16.7 Infrared Support The UART module provides two types of infrared UART support: * IrDA clock output to support external IrDA encoder and decoder device (legacy module support) * Full implementation of the IrDA encoder and decoder. A transmit interrupt will be generated as per the setting of control bits, UTXISEL<1:0>. 16.4 Break and Sync Transmit Sequence 16.7.1 EXTERNAL IrDA SUPPORT - IrDA CLOCK OUTPUT The following sequence will send a message frame header made up of a Break, followed by an auto-baud Sync byte. 1. 2. 3. Configure the UART for the desired mode. Set UTXEN and UTXBRK, which sets up the Break character. Load the UxTXREG register with a dummy character to initiate transmission (value is ignored). Write 0x55 to UxTXREG, which loads the Sync character into the transmit FIFO. After the Break has been sent, the UTXBRK bit is reset by hardware. To support external IrDA encoder and decoder devices, the BCLK pin can be configured to generate the 16x baud clock. With UEN<1:0> = 11, the BCLK pin will output the 16x baud clock if the UART module is enabled. The pin can be used to support the IrDA codec chip. 16.7.2 BUILT-IN IrDA ENCODER AND DECODER 4. The Sync character now transmits. The UART module includes full implementation of the IrDA encoder and decoder. The built-in IrDA encoder and decoder functionality is enabled using the IREN bit (UxMODE<12>). When enabled (IREN = 1), the receive pin (UxRX) acts as the input from the infrared receiver. The transmit pin (UxTX) acts as the output to the infrared transmitter. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 155 dsPIC33FJ12GP201/202 REGISTER 16-1: R/W-0 UARTEN bit 15 R/W-0 HC WAKE bit 7 Legend: R = Readable bit -n = Value at POR bit 15 HC = Hardware cleared W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 LPBACK R/W-0 HC ABAUD R/W-0 URXINV R/W-0 BRGH R/W-0 R/W-0 UxMODE: UARTx MODE REGISTER U-0 -- R/W-0 USIDL R/W-0 IREN(1) R/W-0 RTSMD U-0 -- R/W-0 R/W-0 bit 8 R/W-0 STSEL bit 0 UEN<1:0> PDSEL<1:0> UARTEN: UARTx Enable bit 1 = UARTx is enabled; all UARTx pins are controlled by UARTx as defined by UEN<1:0> 0 = UARTx is disabled; all UARTx pins are controlled by port latches; UARTx power consumption minimal Unimplemented: Read as `0' USIDL: Stop in Idle Mode bit 1 = Discontinue module operation when device enters Idle mode 0 = Continue module operation in Idle mode IREN: IrDA Encoder and Decoder Enable bit(1) 1 = IrDA encoder and decoder enabled 0 = IrDA encoder and decoder disabled RTSMD: Mode Selection for UxRTS Pin bit 1 = UxRTS pin in Simplex mode 0 = UxRTS pin in Flow Control mode Unimplemented: Read as `0' UEN<1:0>: UARTx Enable bits 11 = UxTX, UxRX and BCLK pins are enabled and used; UxCTS pin controlled by port latches 10 = UxTX, UxRX, UxCTS and UxRTS pins are enabled and used 01 = UxTX, UxRX and UxRTS pins are enabled and used; UxCTS pin controlled by port latches 00 = UxTX and UxRX pins are enabled and used; UxCTS and UxRTS/BCLK pins controlled by port latches WAKE: Wake-up on Start bit Detect During Sleep Mode Enable bit 1 = UARTx will continue to sample the UxRX pin; interrupt generated on falling edge; bit cleared in hardware on following rising edge 0 = No wake-up enabled LPBACK: UARTx Loopback Mode Select bit 1 = Enable Loopback mode 0 = Loopback mode is disabled ABAUD: Auto-Baud Enable bit 1 = Enable baud rate measurement on the next character - requires reception of a Sync field (55h) before other data; cleared in hardware upon completion 0 = Baud rate measurement disabled or completed URXINV: Receive Polarity Inversion bit 1 = UxRX Idle state is `0' 0 = UxRX Idle state is `1' This feature is only available for the 16x BRG mode (BRGH = 0). bit 14 bit 13 bit 12 bit 11 bit 10 bit 9-8 bit 7 bit 6 bit 5 bit 4 Note 1: DS70264B-page 156 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 16-1: bit 3 UxMODE: UARTx MODE REGISTER (CONTINUED) BRGH: High Baud Rate Enable bit 1 = BRG generates 4 clocks per bit period (4x baud clock, High-Speed mode) 0 = BRG generates 16 clocks per bit period (16x baud clock, Standard mode) PDSEL<1:0>: Parity and Data Selection bits 11 = 9-bit data, no parity 10 = 8-bit data, odd parity 01 = 8-bit data, even parity 00 = 8-bit data, no parity STSEL: Stop Bit Selection bit 1 = Two Stop bits 0 = One Stop bit This feature is only available for the 16x BRG mode (BRGH = 0). bit 2-1 bit 0 Note 1: (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 157 dsPIC33FJ12GP201/202 REGISTER 16-2: R/W-0 UTXISEL1 bit 15 R/W-0 bit 7 Legend: R = Readable bit -n = Value at POR bit 15,13 HC = Hardware cleared W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 R/W-0 ADDEN R-1 RIDLE R-0 PERR R-0 FERR R/C-0 OERR R-0 URXDA bit 0 UxSTA: UARTx STATUS AND CONTROL REGISTER R/W-0 R/W-0 UTXISEL0 U-0 -- R/W-0 HC UTXBRK R/W-0 UTXEN R-0 UTXBF R-1 TRMT bit 8 UTXINV(1) URXISEL<1:0> UTXISEL<1:0>: Transmission Interrupt Mode Selection bits 11 = Reserved; do not use 10 = Interrupt when a character is transferred to the Transmit Shift Register, and as a result, the transmit buffer becomes empty 01 = Interrupt when the last character is shifted out of the Transmit Shift Register; all transmit operations are completed 00 = Interrupt when a character is transferred to the Transmit Shift Register (this implies there is at least one character open in the transmit buffer) UTXINV: IrDA Encoder Transmit Polarity Inversion bit(1) 1 = IrDA encoded, UxTX Idle state is `1' 0 = IrDA encoded, UxTX Idle state is `0' Unimplemented: Read as `0' UTXBRK: Transmit Break bit 1 = Send Sync Break on next transmission - Start bit, followed by twelve `0' bits, followed by Stop bit; cleared by hardware upon completion 0 = Sync Break transmission disabled or completed UTXEN: Transmit Enable bit 1 = Transmit enabled, UxTX pin controlled by UARTx 0 = Transmit disabled, any pending transmission is aborted and buffer is reset. UxTX pin controlled by port UTXBF: Transmit Buffer Full Status bit (read-only) 1 = Transmit buffer is full 0 = Transmit buffer is not full, at least one more character can be written TRMT: Transmit Shift Register Empty bit (read-only) 1 = Transmit Shift Register is empty and transmit buffer is empty (the last transmission has completed) 0 = Transmit Shift Register is not empty, a transmission is in progress or queued URXISEL<1:0>: Receive Interrupt Mode Selection bits 11 = Interrupt is set on UxRSR transfer making the receive buffer full (i.e., has 4 data characters) 10 = Interrupt is set on UxRSR transfer making the receive buffer 3/4 full (i.e., has 3 data characters) 0x = Interrupt is set when any character is received and transferred from the UxRSR to the receive buffer. Receive buffer has one or more characters ADDEN: Address Character Detect bit (bit 8 of received data = 1) 1 = Address Detect mode enabled. If 9-bit mode is not selected, this does not take effect 0 = Address Detect mode disabled Value of bit only affects the transmit properties of the module when the IrDA encoder is enabled (IREN = 1). bit 14 bit 12 bit 11 bit 10 bit 9 bit 8 bit 7-6 bit 5 Note 1: DS70264B-page 158 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 16-2: bit 4 UxSTA: UARTx STATUS AND CONTROL REGISTER (CONTINUED) RIDLE: Receiver Idle bit (read-only) 1 = Receiver is Idle 0 = Receiver is active PERR: Parity Error Status bit (read-only) 1 = Parity error has been detected for the current character (character at the top of the receive FIFO) 0 = Parity error has not been detected FERR: Framing Error Status bit (read-only) 1 = Framing error has been detected for the current character (character at the top of the receive FIFO) 0 = Framing error has not been detected OERR: Receive Buffer Overrun Error Status bit (read/clear only) 1 = Receive buffer has overflowed 0 = Receive buffer has not overflowed. Clearing a previously set OERR bit (1 0 transition) will reset the receiver buffer and the UxRSR to the empty state URXDA: Receive Buffer Data Available bit (read-only) 1 = Receive buffer has data, at least one more character can be read 0 = Receive buffer is empty Value of bit only affects the transmit properties of the module when the IrDA encoder is enabled (IREN = 1). bit 3 bit 2 bit 1 bit 0 Note 1: (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 159 dsPIC33FJ12GP201/202 NOTES: DS70264B-page 160 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 17.0 10-BIT/12-BIT ANALOG-TO-DIGITAL CONVERTER (ADC) This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. Depending on the particular device pinout, the ADC can have up to 10 analog input pins, designated AN0 through AN9. In addition, there are two analog input pins for external voltage reference connections. These voltage reference inputs can be shared with other analog input pins. The actual number of analog input pins and external voltage reference input configuration depend on the specific device. A block diagram of the ADC is shown in Figure 17-1. Note: 17.2 1. 2. ADC Initialization To configure the ADC module: Select port pins as analog inputs (AD1PCFGH<15:0> or AD1PCFGL<15:0>). Select voltage reference source to match expected range on analog inputs (AD1CON2<15:13>). Select the analog conversion clock to match desired data rate with processor clock (AD1CON3<5:0>). Determine how many sample-and-hold channels will be used (AD1CON2<9:8> and AD1PCFGH<15:0> or AD1PCFGL<15:0>). Select the appropriate sample/conversion sequence (AD1CON1<7:5> and AD1CON3<12:8>). Select the way conversion results are presented in the buffer (AD1CON1<9:8>). a) Turn on the ADC module (AD1CON1<15>). Configure ADC interrupt (if required): a) Clear the AD1IF bit. b) Select ADC interrupt priority. The dsPIC33FJ12GP201/202 devices have up to 10 ADC module input channels. The AD12B bit (AD1CON1<10>) allows each of the ADC modules to be configured as either a 10-bit, 4-sample-and-hold ADC (default configuration) or a 12-bit, 1-sample-and-hold ADC. Note: The ADC module must be disabled before the AD12B bit can be modified. 3. 4. 17.1 Key Features 5. The 10-bit ADC configuration has the following key features: * * * * * * * * * * * Successive Approximation (SAR) conversion Conversion speeds of up to 1.1 Msps Up to 10 analog input pins External voltage reference input pins Simultaneous sampling of up to four analog input pins Automatic Channel Scan mode Selectable conversion trigger source Selectable Buffer Fill modes Four result alignment options (signed/unsigned, fractional/integer) Operation during CPU Sleep and Idle modes 16-word bit conversion result buffer 6. 7. The 12-bit ADC configuration supports all the above features, except: * In the 12-bit configuration, conversion speeds of up to 500 ksps are supported * There is only 1 sample-and-hold amplifier in the 12-bit configuration, so simultaneous sampling of multiple channels is not supported. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 161 dsPIC33FJ12GP201/202 FIGURE 17-1: VREF+(1) VREF-(1) AVSS ADC1 MODULE BLOCK DIAGRAM AVDD AN0 AN0 AN3 AN6(3) AN9(3) VREF- + S/H CH1(2) ADC1 AN1 AN1 AN4 AN7(3) VREF- + S/H CH2(2) Conversion Result Conversion Logic AN2 + S/H CH3(2) CH1,CH2, CH3,CH0 Sample/Sequence Control AN8(3) VREF00000 00001 00010 00011 00100 00101 00110 00111 01000 01001 Sample AN3 AN4 AN5 AN6(3) AN7(3) AN8(3) AN9(3) Input Switches Input MUX Control + VREFAN1 S/H CH0 Note 1: 2: 3: VREF+, VREF- inputs can be multiplexed with other analog inputs. Channels 1, 2 and 3 are not applicable for the 12-bit mode of operation. AN6 through AN9 are not applicable to dsPIC33FJ12GP201 devices. DS70264B-page 162 Preliminary (c) 2007 Microchip Technology Inc. Bus Interface AN2 AN5 16-bit ADC Output Buffer Data Format dsPIC33FJ12GP201/202 EQUATION 17-1: ADC CONVERSION CLOCK PERIOD TAD = TCY(ADCS + 1) ADCS = TAD -1 TCY FIGURE 17-2: Output Code ADC TRANSFER FUNCTION (10-BIT EXAMPLE) 11 1111 1111 (= 1023) 11 1111 1110 (= 1022) 10 0000 0011 (= 515) 10 0000 0010 (= 514) 10 0000 0001 (= 513) 10 0000 0000 (= 512) 01 1111 1111 (= 511) 01 1111 1110 (= 510) 01 1111 1101 (= 509) 00 0000 0001 (= 1) 00 0000 0000 (= 0) VREFL VREFL + VREFH - VREFL 1024 VREFL + 512 * (VREFH - VREFL) 1024 VREFL + 1023 * (VREFH - VREFL) 1024 (VINH - VINL) VREFH FIGURE 17-3: ADC CONVERSION CLOCK PERIOD BLOCK DIAGRAM AD1CON3<15> ADC Internal RC Clock AD1CON3<5:0> 6 ADC Conversion Clock Multiplier 1, 2, 3, 4, 5,..., 64 Note: 0 TAD 1 TOSC(1) X2 TCY Refer to Figure 7-2 for the derivation of FOSC when the PLL is enabled. If the PLL is not used, FOSC is equal to the clock frequency. TOSC = 1/FOSC. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 163 dsPIC33FJ12GP201/202 REGISTER 17-1: R/W-0 ADON bit 15 R/W-0 R/W-0 SSRC<2:0> bit 7 Legend: R = Readable bit -n = Value at POR bit 15 HC = Cleared by hardware W = Writable bit `1' = Bit is set HS = Set by hardware U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 U-0 -- R/W-0 SIMSAM R/W-0 ASAM R/W-0 HC,HS SAMP AD1CON1: ADC1 CONTROL REGISTER 1 U-0 -- R/W-0 ADSIDL U-0 -- U-0 -- R/W-0 AD12B R/W-0 R/W-0 bit 8 R/C-0 HC, HS DONE bit 0 FORM<1:0> ADON: ADC Operating Mode bit 1 = ADC module is operating 0 = ADC is off Unimplemented: Read as `0' ADSIDL: Stop in Idle Mode bit 1 = Discontinue module operation when device enters Idle mode 0 = Continue module operation in Idle mode Unimplemented: Read as `0' AD12B: 10-bit or 12-bit Operation Mode bit 1 = 12-bit, 1-channel ADC operation 0 = 10-bit, 4-channel ADC operation FORM<1:0>: Data Output Format bits For 10-bit operation: 11 = Signed fractional (DOUT = sddd dddd dd00 0000, where s = .NOT.d<9>) 10 = Fractional (DOUT = dddd dddd dd00 0000) 01 = Signed integer (DOUT = ssss sssd dddd dddd, where s = .NOT.d<9>) 00 = Integer (DOUT = 0000 00dd dddd dddd) For 12-bit operation: 11 = Signed fractional (DOUT = sddd dddd dddd 0000, where s = .NOT.d<11>) 10 = Fractional (DOUT = dddd dddd dddd 0000) 01 = Signed Integer (DOUT = ssss sddd dddd dddd, where s = .NOT.d<11>) 00 = Integer (DOUT = 0000 dddd dddd dddd) SSRC<2:0>: Sample Clock Source Select bits 111 = Internal counter ends sampling and starts conversion (auto-convert) 110 = Reserved 101 = Motor Control PWM2 interval ends sampling and starts conversion 100 = Reserved 011 = Motor Control PWM1 interval ends sampling and starts conversion 010 = GP timer 3 compare ends sampling and starts conversion 001 = Active transition on INT0 pin ends sampling and starts conversion 000 = Clearing sample bit ends sampling and starts conversion Unimplemented: Read as `0' SIMSAM: Simultaneous Sample Select bit (applicable only when CHPS<1:0> = 01 or 1x) When AD12B = 1, SIMSAM is: U-0, Unimplemented, Read as `0' 1 = Samples CH0, CH1, CH2, CH3 simultaneously (when CHPS<1:0> = 1x); or Samples CH0 and CH1 simultaneously (when CHPS<1:0> = 01) 0 = Samples multiple channels individually in sequence bit 14 bit 13 bit 12-11 bit 10 bit 9-8 bit 7-5 bit 4 bit 3 DS70264B-page 164 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 17-1: bit 2 AD1CON1: ADC1 CONTROL REGISTER 1 (CONTINUED) ASAM: ADC Sample Auto-Start bit 1 = Sampling begins immediately after last conversion. SAMP bit is auto-set 0 = Sampling begins when SAMP bit is set SAMP: ADC Sample Enable bit 1 = ADC sample-and-hold amplifiers are sampling 0 = ADC sample-and-hold amplifiers are holding If ASAM = 0, software can write `1' to begin sampling. Automatically set by hardware if ASAM = 1. If SSRC = 000, software can write `0' to end sampling and start conversion. If SSRC 000, automatically cleared by hardware to end sampling and start conversion. DONE: ADC Conversion Status bit 1 = ADC conversion cycle is completed 0 = ADC conversion not started or in progress Automatically set by hardware when ADC conversion is complete. Software can write `0' to clear DONE status (software not allowed to write `1'). Clearing this bit will NOT affect any operation in progress. Automatically cleared by hardware at start of a new conversion. bit 1 bit 0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 165 dsPIC33FJ12GP201/202 REGISTER 17-2: R/W-0 bit 15 R-0 BUFS bit 7 Legend: R = Readable bit -n = Value at POR bit 15-13 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 BUFM AD1CON2: ADC1 CONTROL REGISTER 2 R/W-0 R/W-0 U-0 -- U-0 -- R/W-0 CSCNA R/W-0 R/W-0 bit 8 R/W-0 ALTS bit 0 CHPS<1:0> VCFG<2:0> SMPI<3:0> VCFG<2:0>: Converter Voltage Reference Configuration bits ADREF+ 000 001 010 011 1xx AVDD External VREF+ AVDD External VREF+ AVDD ADREFAVSS AVSS External VREFExternal VREFAvss bit 12-11 bit 10 Unimplemented: Read as `0' CSCNA: Scan Input Selections for CH0+ during Sample A bit 1 = Scan inputs 0 = Do not scan inputs CHPS<1:0>: Select Channels Utilized bits When AD12B = 1, CHPS<1:0> is: U-0, Unimplemented, Read as `0' 1x = Converts CH0, CH1, CH2 and CH3 01 = Converts CH0 and CH1 00 = Converts CH0 BUFS: Buffer Fill Status bit (valid only when BUFM = 1) 1 = ADC is currently filling second half of buffer, user application should access data in the first half 0 = ADC is currently filling first half of buffer, user application should access data in the second half Unimplemented: Read as `0' SMPI<3:0>: Sample/Convert Sequences Per Interrupt Selection bits 1111 = Interrupts at the completion of conversion for each 16th sample/convert sequence 1110 = Interrupts at the completion of conversion for each 15th sample/convert sequence * * * 0001 = Interrupts at the completion of conversion for each 2nd sample/convert sequence 0000 = Interrupts at the completion of conversion for each sample/convert sequence BUFM: Buffer Fill Mode Select bit 1 = Starts filling first half of buffer on first interrupt and the second half of buffer on next interrupt 0 = Always starts filling buffer from the beginning ALTS: Alternate Input Sample Mode Select bit 1 = Uses channel input selects for Sample A on first sample and Sample B on next sample 0 = Always uses channel input selects for Sample A bit 9-8 bit 7 bit 6 bit 5-2 bit 1 bit 0 DS70264B-page 166 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 17-3: R/W-0 ADRC bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 AD1CON3: ADC1 CONTROL REGISTER 3 U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 SAMC<4:0> bit 8 R/W-0 bit 0 R/W-0 R/W-0 ADCS<5:0> ADRC: ADC Conversion Clock Source bit 1 = ADC internal RC clock 0 = Clock derived from system clock Unimplemented: Read as `0' SAMC<4:0>: Auto Sample Time bits 11111 = 31 TAD * * * 00001 = 1 TAD 00000 = 0 TAD Unimplemented: Read as `0' ADCS<5:0>: ADC Conversion Clock Select bits 111111 = TCY * (ADCS<7:0> + 1) = 64 * TCY = TAD * * * 000010 = TCY * (ADCS<7:0> + 1) = 3 * TCY = TAD 000001 = TCY * (ADCS<7:0> + 1) = 2 * TCY = TAD 000000 = TCY * (ADCS<7:0> + 1) = 1 * TCY = TAD bit 14-13 bit 12-8 bit 7-6 bit 5-0 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 167 dsPIC33FJ12GP201/202 REGISTER 17-4: U-0 -- bit 15 U-0 -- bit 7 Legend: R = Readable bit -n = Value at POR bit 15-11 bit 10-9 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- U-0 -- U-0 -- R/W-0 R/W-0 AD1CHS123: ADC1 INPUT CHANNEL 1, 2, 3 SELECT REGISTER U-0 -- U-0 -- U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 CH123SB bit 8 R/W-0 CH123SA bit 0 CH123NB<1:0> CH123NA<1:0> Unimplemented: Read as `0' CH123NB<1:0>: Channel 1, 2, 3 Negative Input Select for Sample B bits dsPIC33FJ12GP201 devices only: If AD12B = 1: 11 = Reserved 10 = Reserved 01 = Reserved 00 = Reserved If AD12B = 0: 11 = Reserved 10 = Reserved 01 = CH1, CH2, CH3 negative input is VREF00 = CH1, CH2, CH3 negative input is VREFdsPIC33FJ12GP202 devices only: If AD12B = 1: 11 = Reserved 10 = Reserved 01 = Reserved 00 = Reserved If AD12B = 0: 11 = CH1 negative input is AN9, CH2 and CH3 negative inputs are not connected 10 = CH1 negative input is AN6, CH2 negative input is AN7, CH3 negative input is AN8 01 = CH1, CH2, CH3 negative input is VREF00 = CH1, CH2, CH3 negative input is VREF- bit 8 CH123SB: Channel 1, 2, 3 Positive Input Select for Sample B bit If AD12B = 1: 1 = Reserved 0 = Reserved If AD12B = 0: 1 = CH1 positive input is AN3, CH2 positive input is AN4, CH3 positive input is AN5 0 = CH1 positive input is AN0, CH2 positive input is AN1, CH3 positive input is AN2 bit 7-3 Unimplemented: Read as `0' DS70264B-page 168 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 17-4: bit 2-1 AD1CHS123: ADC1 INPUT CHANNEL 1, 2, 3 SELECT REGISTER (CONTINUED) CH123NA<1:0>: Channel 1, 2, 3 Negative Input Select for Sample A bits dsPIC33FJ12GP201 devices only: If AD12B = 1: 11 = Reserved 10 = Reserved 01 = Reserved 00 = Reserved If AD12B = 0: 11 = Reserved 10 = Reserved 01 = CH1, CH2, CH3 negative input is VREF00 = CH1, CH2, CH3 negative input is VREFdsPIC33FJ12GP202 devices only: If AD12B = 1: 11 = Reserved 10 = Reserved 01 = Reserved 00 = Reserved If AD12B = 0: 11 = CH1 negative input is AN9, CH2 and CH3 negative inputs are not connected 10 = CH1 negative input is AN6, CH2 negative input is AN7, CH3 negative input is AN8 01 = CH1, CH2, CH3 negative input is VREF00 = CH1, CH2, CH3 negative input is VREF- bit 0 CH123SA: Channel 1, 2, 3 Positive Input Select for Sample A bit If AD12B = 1: 1 = Reserved 0 = Reserved If AD12B = 0: 1 = CH1 positive input is AN3, CH2 positive input is AN4, CH3 positive input is AN5 0 = CH1 positive input is AN0, CH2 positive input is AN1, CH3 positive input is AN2 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 169 dsPIC33FJ12GP201/202 REGISTER 17-5: R/W-0 CH0NB bit 15 R/W-0 CH0NA bit 7 Legend: R = Readable bit -n = Value at POR bit 15 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 CH0SA<4:0> bit 0 R/W-0 AD1CHS0: ADC1 INPUT CHANNEL 0 SELECT REGISTER U-0 -- U-0 -- R/W-0 R/W-0 R/W-0 CH0SB<4:0> bit 8 R/W-0 R/W-0 R/W-0 CH0NB: Channel 0 Negative Input Select for Sample B bit 1 = Channel 0 negative input is AN1 0 = Channel 0 negative input is VREFUnimplemented: Read as `0' CH0SB<4:0>: Channel 0 Positive Input Select for Sample B bits 11111 = Channel 0 positive input is AN31 11110 = Channel 0 positive input is AN30 * * * 00010 = Channel 0 positive input is AN2 00001 = Channel 0 positive input is AN1 00000 = Channel 0 positive input is AN0 CH0NA: Channel 0 Negative Input Select for Sample A bit 1 = Channel 0 negative input is AN1 0 = Channel 0 negative input is VREFUnimplemented: Read as `0' CH0SA<4:0>: Channel 0 Positive Input Select for Sample A bits dsPIC33FJ12GP201 devices only: 00101 = Channel 0 positive input is AN5 * * * 00010 = Channel 0 positive input is AN2 00001 = Channel 0 positive input is AN1 00000 = Channel 0 positive input is AN0 dsPIC33FJ12GP202 devices only: 01001 = Channel 0 positive input is AN9 * * * 00010 = Channel 0 positive input is AN2 00001 = Channel 0 positive input is AN1 00000 = Channel 0 positive input is AN0 bit 14-13 bit 12-8 bit 7 bit 6-5 bit 4-0 DS70264B-page 170 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 REGISTER 17-6: U-0 -- bit 15 R/W-0 CSS7 bit 7 Legend: R = Readable bit -n = Value at POR bit 15-10 bit 9-0 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown R/W-0 CSS6 R/W-0 CSS5 R/W-0 CSS4 R/W-0 CSS3 R/W-0 CSS2 R/W-0 CSS1 AD1CSSL: ADC1 INPUT SCAN SELECT REGISTER LOW(1,2) U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- R/W-0 CSS9 R/W-0 CSS8 bit 8 R/W-0 CSS0 bit 0 Unimplemented: Read as `0' CSS<9:0>: ADC Input Scan Selection bits 1 = Select ANx for input scan 0 = Skip ANx for input scan On devices without nine analog inputs, all AD1CSSL bits can be selected. However, inputs selected for scan without a corresponding input on device will convert ADREF-. dsPIC33FJ12GP201 devices support only six channels (CSS0-CSS5). Note 1: 2: REGISTER 17-7: U-0 -- bit 15 R/W-0 PCFG7 bit 7 Legend: R = Readable bit -n = Value at POR bit 15-10 bit 9-0 AD1PCFGL: ADC1 PORT CONFIGURATION REGISTER LOW(1,2) U-0 -- U-0 -- U-0 -- U-0 -- U-0 -- R/W-0 PCFG9 R/W-0 PCFG8 bit 8 R/W-0 R/W-0 PCFG5 R/W-0 PCFG4 R/W-0 PCFG3 R/W-0 PCFG2 R/W-0 PCFG1 R/W-0 PCFG0 bit 0 PCFG6 W = Writable bit `1' = Bit is set U = Unimplemented bit, read as `0' `0' = Bit is cleared x = Bit is unknown Unimplemented: Read as `0' CSS<9:0>: ADC Input Scan Selection bits 1 = Select ANx for input scan 0 = Skip ANx for input scan On devices without nine analog inputs, all PCFG bits are R/W. However, PCFG bits are ignored on ports without a corresponding input on device. dsPIC33FJ12GP201 devices support only six channels (CSS0-CSS5). Note 1: 2: (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 171 dsPIC33FJ12GP201/202 NOTES: DS70264B-page 172 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 18.0 Note: SPECIAL FEATURES This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. 18.1 Configuration Bits The Configuration bits can be programmed (read as `0'), or left unprogrammed (read as `1'), to select various device configurations. These bits are mapped starting at program memory location 0xF80000. The Device Configuration register map is shown in Table 18-1. The individual Configuration bit descriptions for the FBS, FGS, FOSCSEL, FOSC, FWDT, FPOR and FICD Configuration registers are shown in Table 18-2. Note that address 0xF80000 is beyond the user program memory space. It belongs to the configuration memory space (0x800000-0xFFFFFF), which can only be accessed using table reads and table writes. The upper byte of all device Configuration registers should always be `1111 1111'. This makes them appear to be NOP instructions in the remote event that their locations are ever executed by accident. Since Configuration bits are not implemented in the corresponding locations, writing `1's to these locations has no effect on device operation. To prevent inadvertent configuration changes during code execution, all programmable Configuration bits are write-once. After a bit is initially programmed during a power cycle, it cannot be written to again. Changing a device configuration requires that power to the device be cycled. dsPIC33FJ12GP201/202 devices include several features intended to maximize application flexibility and reliability, and minimize cost through elimination of external components. These are: Flexible configuration Watchdog Timer (WDT) Code Protection and CodeGuardTM Security JTAG Boundary Scan Interface In-Circuit Serial ProgrammingTM (ICSPTM) programming capability * In-Circuit emulation * * * * * TABLE 18-1: Address 0xF80000 0xF80002 0xF80004 0xF80006 0xF80008 0xF8000A 0xF8000E 0xF80010 0xF80012 0xF80014 0xF80016 Note 1: FBS DEVICE CONFIGURATION REGISTER MAP Name Bit 7 -- -- IESO FWDTEN -- Bit 6 -- -- -- WINDIS -- Bit 5 -- -- -- IOL1WAY -- -- -- WDTPRE ALTI2C Reserved(1) User Unit ID Byte 0 User Unit ID Byte 1 User Unit ID Byte 2 User Unit ID Byte 3 -- Bit 4 -- Reserved(1) -- -- -- -- GSS<1:0> FNOSC<2:0> OSCIOFNC POSCMD<1:0> WDTPOST<3:0> FPWRT<2:0> GWRP Bit 3 Bit 2 BSS<2:0> Bit 1 Bit 0 BWRP Reserved FGS FOSCSEL FOSC FWDT Reserved FUID0 FUID1 FUID2 FUID3 FCKSM<1:0> 0xF8000C FPOR These reserved bits read as `1' and must be programmed as `1'. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 173 dsPIC33FJ12GP201/202 TABLE 18-2: Bit Field BWRP dsPIC33FJ12GP201/202 CONFIGURATION BITS DESCRIPTION Register FBS Description Boot Segment Program Flash Write Protection 1 = Boot segment may be written 0 = Boot segment is write-protected Boot Segment Program Flash Code Protection Size X11 = No Boot program Flash segment Boot space is 256 Instruction Words (except interrupt vectors) 110 = Standard security; boot program Flash segment ends at 0x0003FE 010 = High security; boot program Flash segment ends at 0x0003FE Boot space is 768 Instruction Words (except interrupt vectors) 101 = Standard security; boot program Flash segment, ends at 0x0007FE 001 = High security; boot program Flash segment ends at 0x0007FE Boot space is 1792 Instruction Words (except interrupt vectors) 100 = Standard security; boot program Flash segment ends at 0x000FFE 000 = High security; boot program Flash segment ends at 0x000FFE BSS<2:0> FBS GSS<1:0> FGS General Segment Code-Protect bit 11 = User program memory is not code-protected 10 = Standard security 0x = High security General Segment Write-Protect bit 1 = User program memory is not write-protected 0 = User program memory is write-protected Two-speed Oscillator Start-up Enable bit 1 = Start-up device with FRC, then automatically switch to the user-selected oscillator source when ready 0 = Start-up device with user-selected oscillator source Initial Oscillator Source Selection bits 111 = Internal Fast RC (FRC) oscillator with postscaler 110 = Internal Fast RC (FRC) oscillator with divide-by-16 101 = LPRC oscillator 100 = Secondary (LP) oscillator 011 = Primary (XT, HS, EC) oscillator with PLL 010 = Primary (XT, HS, EC) oscillator 001 = Internal Fast RC (FRC) oscillator with PLL 000 = FRC oscillator Clock Switching Mode bits 1x = Clock switching is disabled, fail-safe clock monitor is disabled 01 = Clock switching is enabled, fail-safe clock monitor is disabled 00 = Clock switching is enabled, fail-safe clock monitor is enabled Peripheral Pin Select Configuration 1 = Allow only one reconfiguration 0 = Allow multiple reconfigurations OSC2 Pin Function bit (except in XT and HS modes) 1 = OSC2 is clock output 0 = OSC2 is general purpose digital I/O pin Primary Oscillator Mode Select bits 11 = Primary oscillator disabled 10 = HS Crystal Oscillator mode 01 = XT Crystal Oscillator mode 00 = EC (External Clock) mode GWRP FGS IESO FOSCSEL FNOSC<2:0> FOSCSEL FCKSM<1:0> FOSC IOL1WAY FOSC OSCIOFNC FOSC POSCMD<1:0> FOSC DS70264B-page 174 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 18-2: Bit Field FWDTEN dsPIC33FJ12GP201/202 CONFIGURATION BITS DESCRIPTION (CONTINUED) Register FWDT Description Watchdog Timer Enable bit 1 = Watchdog Timer always enabled (LPRC oscillator cannot be disabled. Clearing the SWDTEN bit in the RCON register will have no effect.) 0 = Watchdog Timer enabled/disabled by user software (LPRC can be disabled by clearing the SWDTEN bit in the RCON register) Watchdog Timer Window Enable bit 1 = Watchdog Timer in Non-Window mode 0 = Watchdog Timer in Window mode Watchdog Timer Prescaler bit 1 = 1:128 0 = 1:32 Watchdog Timer Postscaler bits 1111 = 1:32,768 1110 = 1:16,384 . . . 0001 = 1:2 0000 = 1:1 Alternate I2CTM pins 1 = I2C mapped to SDA1/SCL1 pins 0 = I2C mapped to ASDA1/ASCL1 pins Power-on Reset Timer Value Select bits 111 = PWRT = 128 ms 110 = PWRT = 64 ms 101 = PWRT = 32 ms 100 = PWRT = 16 ms 011 = PWRT = 8 ms 010 = PWRT = 4 ms 001 = PWRT = 2 ms 000 = PWRT = Disabled WINDIS FWDT WDTPRE FWDT WDTPOST<3:0> FWDT ALTI2C FPOR FPWRT<2:0> FPOR (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 175 dsPIC33FJ12GP201/202 18.2 On-Chip Voltage Regulator 18.3 BOR: Brown-Out Reset All of the dsPIC33FJ12GP201/202 devices power their core digital logic at a nominal 2.5V. This can create a conflict for designs that are required to operate at a higher typical voltage, such as 3.3V. To simplify system design, all devices in the dsPIC33FJ12GP201/202 family incorporate an on-chip regulator that allows the device to run its core logic from VDD. The regulator provides power to the core from the other VDD pins. When the regulator is enabled, a low ESR (less than 5 ohms) capacitor (such as tantalum or ceramic) must be connected to the VDDCORE/VCAP pin (Figure 18-1). This helps to maintain the stability of the regulator. The recommended value for the filter capacitor is provided in Table 21-13 located in Section 21.1 "DC Characteristics". On a POR, it takes approximately 20 s for the on-chip voltage regulator to generate an output voltage. During this time, designated as TSTARTUP, code execution is disabled. TSTARTUP is applied every time the device resumes operation after any power-down. The Brown-out Reset (BOR) module is based on an internal voltage reference circuit that monitors the regulated voltage VDDCORE. The main purpose of the BOR module is to generate a device Reset when a brown-out condition occurs. Brown-out conditions are generally caused by glitches on the AC mains (for example, missing portions of the AC cycle waveform due to bad power transmission lines, or voltage sags due to excessive current draw when a large inductive load is turned on). A BOR generates a Reset pulse, which resets the device. The BOR selects the clock source, based on the device Configuration bit values (FNOSC<2:0> and POSCMD<1:0>). If an oscillator mode is selected, the BOR activates the Oscillator Start-up Timer (OST). The system clock is held until OST expires. If the PLL is used, the clock is held until the LOCK bit (OSCCON<5>) is `1'. Concurrently, the PWRT time-out (TPWRT) will be applied before the internal Reset is released. If TPWRT = 0 and a crystal oscillator is being used, a nominal delay of TFSCM = 100 is applied. The total delay in this case is TFSCM. The BOR Status bit (RCON<1>) is set to indicate that a BOR has occurred. The BOR circuit, if enabled, continues to operate while in Sleep or Idle modes and resets the device should VDD fall below the BOR threshold voltage. FIGURE 18-1: CONNECTIONS FOR THE ON-CHIP VOLTAGE REGULATOR(1) 3.3V dsPIC33F VDD VDDCORE/VCAP CF VSS Note 1: These are typical operating voltages. Refer to Table 21-13 located in Section 21.1 "DC Characteristics" for the full operating ranges of VDD and VDDCORE. DS70264B-page 176 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 18.4 Watchdog Timer (WDT) 18.4.2 SLEEP AND IDLE MODES For dsPIC33FJ12GP201/202 devices, the WDT is driven by the LPRC oscillator. When the WDT is enabled, the clock source is also enabled. If the WDT is enabled, it will continue to run during Sleep or Idle modes. When the WDT time-out occurs, the device will wake the device and code execution will continue from where the PWRSAV instruction was executed. The corresponding SLEEP or IDLE bits (RCON<3,2>) will need to be cleared in software after the device wakes up. 18.4.1 PRESCALER/POSTSCALER The nominal WDT clock source from LPRC is 32 kHz. This feeds a prescaler than can be configured for either 5-bit (divide-by-32) or 7-bit (divide-by-128) operation. The prescaler is set by the WDTPRE Configuration bit. With a 32 kHz input, the prescaler yields a nominal WDT time-out period (TWDT) of 1 ms in 5-bit mode, or 4 ms in 7-bit mode. A variable postscaler divides down the WDT prescaler output and allows for a wide range of time-out periods. The postscaler is controlled by the WDTPOST<3:0> Configuration bits (FWDT<3:0>), which allow the selection of 16 settings, from 1:1 to 1:32,768. Using the prescaler and postscaler, time-out periods ranging from 1 ms to 131 seconds can be achieved. The WDT, prescaler and postscaler are reset: * On any device Reset * On the completion of a clock switch, whether invoked by software (i.e., setting the OSWEN bit after changing the NOSC bits) or by hardware (i.e., fail-safe clock monitor) * When a PWRSAV instruction is executed (i.e., Sleep or Idle mode is entered) * When the device exits Sleep or Idle mode to resume normal operation * By a CLRWDT instruction during normal execution Note: The CLRWDT and PWRSAV instructions clear the prescaler and postscaler counts when executed. 18.4.3 ENABLING WDT The WDT is enabled or disabled by the FWDTEN Configuration bit in the FWDT Configuration register. When the FWDTEN Configuration bit is set, the WDT is always enabled. The WDT flag bit, WDTO (RCON<4>), is not automatically cleared following a WDT time-out. To detect subsequent WDT events, the flag must be cleared in software. The WDT can be optionally controlled in software when the FWDTEN Configuration bit has been programmed to `0'. The WDT is enabled in software by setting the SWDTEN control bit (RCON<5>). The SWDTEN control bit is cleared on any device Reset. The software WDT option allows the user application to enable the WDT for critical code segments and disable the WDT during non-critical segments for maximum power savings. Note: If the WINDIS bit (FWDT<6>) is cleared, the CLRWDT instruction should be executed by the application software only during the last 1/4 of the WDT period. This CLRWDT window can be determined by using a timer. If a CLRWDT instruction is executed before this window, a WDT Reset occurs. FIGURE 18-2: WDT BLOCK DIAGRAM All Device Resets Transition to New Clock Source Exit Sleep or Idle Mode PWRSAV Instruction CLRWDT Instruction Watchdog Timer Sleep/Idle SWDTEN FWDTEN WDTPRE WDTPOST<3:0> WDT Wake-up 1 WDT Reset LPRC Clock RS Prescaler (divide by N1) RS Postscaler (divide by N2) 0 WINDIS WDT Window Select CLRWDT Instruction (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 177 dsPIC33FJ12GP201/202 18.5 JTAG Interface 18.8 The dsPIC33FJ12GP201/202 devices implement a JTAG interface, which supports boundary scan device testing, as well as in-circuit programming. Detailed information on this interface will be provided in future revisions of the document. Code Protection and CodeGuardTM Security 18.6 In-Circuit Serial Programming The dsPIC33FJ12GP201/202 devices can be serially programmed while in the end application circuit. This is done with two lines for clock and data and three other lines for power, ground and the programming sequence. Serial programming allows customers to manufacture boards with unprogrammed devices and then program the digital signal controller just before shipping the product. Serial programming also allows the most recent firmware or a custom firmware to be programmed. Refer to the "dsPIC33F Flash Programming Specification" (DS70152) document for details about In-Circuit Serial Programming (ICSP). Any of the three pairs of programming clock/data pins can be used: * PGC1/EMUC1 and PGD1/EMUD1 * PGC2/EMUC2 and PGD2/EMUD2 * PGC3/EMUC3 and PGD3/EMUD3 The dsPIC33FJ12GP201/202 devices offer the intermediate implementation of CodeGuard Security. CodeGuard Security enables multiple parties to securely share resources (memory, interrupts and peripherals) on a single chip. This feature helps protect individual Intellectual Property in collaborative system designs. When coupled with software encryption libraries, CodeGuard Security can be used to securely update Flash even when multiple IPs reside on the single chip. The code protection features are controlled by the Configuration registers: FBS and FGS. The Secure Segment and RAM is not implemented. TABLE 18-3: CODE FLASH SECURITY SEGMENT SIZES FOR 12K BYTE DEVICES 000000h 0001FEh 000200h 0003FEh 000400h 0007FEh 000800h 000FFEh 001000h 001FFEh VS = 256 IW 000000h 0001FEh 000200h 0003FEh 000400h 0007FEh 000800h 000FFEh 001000h 001FFEh VS = 256 IW 000000h 0001FEh 000200h 0003FEh 000400h 0007FEh 000800h 000FFEh 001000h 001FFEh VS = 256 IW 000000h 0001FEh 000200h 0003FEh 000400h 0007FEh 000800h 000FFEh 001000h 001FFEh CONFIG BITS VS = 256 IW BSS<2:0> = x11 0K GS = 3840 IW 18.7 In-Circuit Debugger (R) When MPLAB ICD 2 is selected as a debugger, the in-circuit debugging functionality is enabled. This function allows simple debugging functions when used with MPLAB IDE. Debugging functionality is controlled through the EMUCx (Emulation/Debug Clock) and EMUDx (Emulation/Debug Data) pin functions. Any of the three pairs of debugging clock/data pins can be used: * PGC1/EMUC1 and PGD1/EMUD1 * PGC2/EMUC2 and PGD2/EMUD2 * PGC3/EMUC3 and PGD3/EMUD3 To use the in-circuit debugger function of the device, the design must implement ICSP connections to MCLR, VDD, VSS, PGC, PGD and the EMUDx/EMUCx pin pair. In addition, when the feature is enabled, some of the resources are not available for general use. These resources include the first 80 bytes of data RAM and two I/O pins. BSS<2:0> = x10 256 BS = 256 IW GS = 3584 IW BSS<2:0> = x01 768 BS = 768 IW GS = 3072 IW BSS<2:0> = x00 1792 BS = 1792 IW GS = 2048 IW Note: Refer to Section 23. "CodeGuardTM Security" (DS70199) of the dsPIC33F Family Reference Manual for further information on usage, configuration and operation of CodeGuard Security. DS70264B-page 178 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 19.0 Note: INSTRUCTION SET SUMMARY This data sheet summarizes the features of the dsPIC33FJ12GP201/202 devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. Most bit-oriented instructions (including simple rotate/ shift instructions) have two operands: * The W register (with or without an address modifier) or file register (specified by the value of `Ws' or `f') * The bit in the W register or file register (specified by a literal value or indirectly by the contents of register `Wb') The literal instructions that involve data movement can use some of the following operands: * A literal value to be loaded into a W register or file register (specified by `k') * The W register or file register where the literal value is to be loaded (specified by `Wb' or `f') However, literal instructions that involve arithmetic or logical operations use some of the following operands: * The first source operand, which is a register `Wb' without any address modifier * The second source operand, which is a literal value * The destination of the result (only if not the same as the first source operand), which is typically a register `Wd' with or without an address modifier The MAC class of DSP instructions can use some of the following operands: * The accumulator (A or B) to be used (required operand) * The W registers to be used as the two operands * The X and Y address space prefetch operations * The X and Y address space prefetch destinations * The accumulator write back destination The other DSP instructions do not involve any multiplication and can include: * The accumulator to be used (required) * The source or destination operand (designated as Wso or Wdo, respectively) with or without an address modifier * The amount of shift specified by a W register `Wn' or a literal value The control instructions can use some of the following operands: * A program memory address * The mode of the table read and table write instructions The dsPIC33F instruction set is identical to that of the dsPIC30F. Most instructions are a single program memory word (24 bits). Only three instructions require two program memory locations. Each single-word instruction is a 24-bit word, divided into an 8-bit opcode, which specifies the instruction type and one or more operands, which further specify the operation of the instruction. The instruction set is highly orthogonal and is grouped into five basic categories: * * * * * Word or byte-oriented operations Bit-oriented operations Literal operations DSP operations Control operations Table 19-1 shows the general symbols used in describing the instructions. The dsPIC33F instruction set summary in Table 19-2 lists all the instructions, along with the status flags affected by each instruction. Most word or byte-oriented W register instructions (including barrel shift instructions) have three operands: * The first source operand, which is typically a register `Wb' without any address modifier * The second source operand, which is typically a register `Ws' with or without an address modifier * The destination of the result, which is typically a register `Wd' with or without an address modifier However, word or byte-oriented file register instructions have two operands: * The file register specified by the value `f' * The destination, which could be either the file register `f' or the W0 register, which is denoted as `WREG' (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 179 dsPIC33FJ12GP201/202 Most instructions are a single word. Certain doubleword instructions, which were designed to provide all of the required information in these 48 bits. In the second word, the 8 MSbs are `0's. If this second word is executed as an instruction (by itself), it will execute as a NOP. The double-word instructions execute in two instruction cycles. Most single-word instructions are executed in a single instruction cycle, unless a conditional test is true, or the program counter is changed as a result of the instruction. In these cases, the execution takes two instruction cycles with the additional instruction cycle(s) executed as a NOP. Notable exceptions are the BRA (unconditional/computed branch), indirect CALL/GOTO, all table reads and writes and RETURN/RETFIE instructions, which are single-word instructions but take two or three cycles. Certain instructions that involve skipping over the subsequent instruction require either two or three cycles if the skip is performed, depending on whether the instruction being skipped is a single-word or two-word instruction. Moreover, double-word moves require two cycles. Note: For more details on the instruction set, refer to the "dsPIC30F/33F Programmer's Reference Manual" (DS70157). TABLE 19-1: Field #text (text) [text] {} SYMBOLS USED IN OPCODE DESCRIPTIONS Description Means literal defined by "text" Means "content of text" Means "the location addressed by text" Optional field or operation Register bit field Byte mode selection Double-Word mode selection Shadow register select Word mode selection (default) One of two accumulators {A, B} Accumulator write back destination address register {W13, [W13] + = 2} 4-bit bit selection field (used in word addressed instructions) {0...15} MCU Status bits: Carry, Digit Carry, Negative, Overflow, Sticky Zero Absolute address, label or expression (resolved by the linker) File register address {0x0000...0x1FFF} 1-bit unsigned literal {0,1} 4-bit unsigned literal {0...15} 5-bit unsigned literal {0...31} 8-bit unsigned literal {0...255} 10-bit unsigned literal {0...255} for Byte mode, {0:1023} for Word mode 14-bit unsigned literal {0...16384} 16-bit unsigned literal {0...65535} 23-bit unsigned literal {0...8388608}; LSb must be `0' Field does not require an entry, may be blank DSP Status bits: ACCA Overflow, ACCB Overflow, ACCA Saturate, ACCB Saturate Program Counter 10-bit signed literal {-512...511} 16-bit signed literal {-32768...32767} 6-bit signed literal {-16...16} Base W register {W0..W15} Destination W register { Wd, [Wd], [Wd++], [Wd--], [++Wd], [--Wd] } Destination W register { Wnd, [Wnd], [Wnd++], [Wnd--], [++Wnd], [--Wnd], [Wnd+Wb] } Dividend, Divisor working register pair (direct addressing) DS70264B-page 180 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 19-1: Field Wm*Wm Wm*Wn Wn Wnd Wns WREG Ws Wso Wx SYMBOLS USED IN OPCODE DESCRIPTIONS (CONTINUED) Description Multiplicand and Multiplier working register pair for Square instructions {W4 * W4,W5 * W5,W6 * W6,W7 * W7} Multiplicand and Multiplier working register pair for DSP instructions {W4 * W5,W4 * W6,W4 * W7,W5 * W6,W5 * W7,W6 * W7} One of 16 working registers {W0..W15} One of 16 destination working registers {W0..W15} One of 16 source working registers {W0..W15} W0 (working register used in file register instructions) Source W register { Ws, [Ws], [Ws++], [Ws--], [++Ws], [--Ws] } Source W register { Wns, [Wns], [Wns++], [Wns--], [++Wns], [--Wns], [Wns+Wb] } X data space prefetch address register for DSP instructions {[W8] + = 6, [W8] + = 4, [W8] + = 2, [W8], [W8] - = 6, [W8] - = 4, [W8] - = 2, [W9] + = 6, [W9] + = 4, [W9] + = 2, [W9], [W9] - = 6, [W9] - = 4, [W9] - = 2, [W9 + W12], none} X data space prefetch destination register for DSP instructions {W4..W7} Y data space prefetch address register for DSP instructions {[W10] + = 6, [W10] + = 4, [W10] + = 2, [W10], [W10] - = 6, [W10] - = 4, [W10] - = 2, [W11] + = 6, [W11] + = 4, [W11] + = 2, [W11], [W11] - = 6, [W11] - = 4, [W11] - = 2, [W11 + W12], none} Y data space prefetch destination register for DSP instructions {W4..W7} Wxd Wy Wyd (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 181 dsPIC33FJ12GP201/202 TABLE 19-2: Base Instr # 1 Assembly Mnemonic ADD ADD ADD ADD ADD ADD ADD ADD 2 ADDC ADDC ADDC ADDC ADDC ADDC 3 AND AND AND AND AND AND 4 ASR ASR ASR ASR ASR ASR 5 6 BCLR BRA BCLR BCLR BRA BRA BRA BRA BRA BRA BRA BRA BRA BRA BRA BRA BRA BRA BRA BRA BRA BRA BRA BRA BRA BRA 7 8 9 BSET BSW BTG BSET BSET BSW.C BSW.Z BTG BTG INSTRUCTION SET OVERVIEW Assembly Syntax Acc f f,WREG #lit10,Wn Wb,Ws,Wd Wb,#lit5,Wd Wso,#Slit4,Acc f f,WREG #lit10,Wn Wb,Ws,Wd Wb,#lit5,Wd f f,WREG #lit10,Wn Wb,Ws,Wd Wb,#lit5,Wd f f,WREG Ws,Wd Wb,Wns,Wnd Wb,#lit5,Wnd f,#bit4 Ws,#bit4 C,Expr GE,Expr GEU,Expr GT,Expr GTU,Expr LE,Expr LEU,Expr LT,Expr LTU,Expr N,Expr NC,Expr NN,Expr NOV,Expr NZ,Expr OA,Expr OB,Expr OV,Expr SA,Expr SB,Expr Expr Z,Expr Wn f,#bit4 Ws,#bit4 Ws,Wb Ws,Wb f,#bit4 Ws,#bit4 Description Add Accumulators f = f + WREG WREG = f + WREG Wd = lit10 + Wd Wd = Wb + Ws Wd = Wb + lit5 16-bit Signed Add to Accumulator f = f + WREG + (C) WREG = f + WREG + (C) Wd = lit10 + Wd + (C) Wd = Wb + Ws + (C) Wd = Wb + lit5 + (C) f = f .AND. WREG WREG = f .AND. WREG Wd = lit10 .AND. Wd Wd = Wb .AND. Ws Wd = Wb .AND. lit5 f = Arithmetic Right Shift f WREG = Arithmetic Right Shift f Wd = Arithmetic Right Shift Ws Wnd = Arithmetic Right Shift Wb by Wns Wnd = Arithmetic Right Shift Wb by lit5 Bit Clear f Bit Clear Ws Branch if Carry Branch if greater than or equal Branch if unsigned greater than or equal Branch if greater than Branch if unsigned greater than Branch if less than or equal Branch if unsigned less than or equal Branch if less than Branch if unsigned less than Branch if Negative Branch if Not Carry Branch if Not Negative Branch if Not Overflow Branch if Not Zero Branch if Accumulator A overflow Branch if Accumulator B overflow Branch if Overflow Branch if Accumulator A saturated Branch if Accumulator B saturated Branch Unconditionally Branch if Zero Computed Branch Bit Set f Bit Set Ws Write C bit to Ws DS70264B-page 182 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 19-2: Base Instr # 10 Assembly Mnemonic BTSC BTSC BTSC 11 BTSS BTSS BTSS 12 BTST BTST BTST.C BTST.Z BTST.C BTST.Z 13 BTSTS BTSTS BTSTS.C BTSTS.Z 14 15 CALL CLR CALL CALL CLR CLR CLR CLR 16 17 CLRWDT COM CLRWDT COM COM COM 18 CP CP CP CP 19 20 CP0 CPB CP0 CP0 CPB CPB CPB 21 22 23 24 25 26 CPSEQ CPSGT CPSLT CPSNE DAW DEC CPSEQ CPSGT CPSLT CPSNE DAW DEC DEC DEC 27 DEC2 DEC2 DEC2 DEC2 28 DISI DISI f f,WREG Ws,Wd f Wb,#lit5 Wb,Ws f Ws f Wb,#lit5 Wb,Ws Wb, Wn Wb, Wn Wb, Wn Wb, Wn Wn f f,WREG Ws,Wd f f,WREG Ws,Wd #lit14 INSTRUCTION SET OVERVIEW (CONTINUED) Assembly Syntax f,#bit4 Ws,#bit4 f,#bit4 Ws,#bit4 f,#bit4 Ws,#bit4 Ws,#bit4 Ws,Wb Ws,Wb f,#bit4 Ws,#bit4 Ws,#bit4 lit23 Wn f WREG Ws Acc,Wx,Wxd,Wy,Wyd,AWB Description Bit Test f, Skip if Clear Bit Test Ws, Skip if Clear Bit Test f, Skip if Set Bit Test Ws, Skip if Set Bit Test f Bit Test Ws to C Bit Test Ws to Z Bit Test Ws (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 183 dsPIC33FJ12GP201/202 TABLE 19-2: Base Instr # 29 Assembly Mnemonic DIV DIV.S DIV.SD DIV.U DIV.UD 30 31 32 33 34 35 36 37 38 39 DIVF DO ED EDAC EXCH FBCL FF1L FF1R GOTO INC DIVF DO DO ED EDAC EXCH FBCL FF1L FF1R GOTO GOTO INC INC INC 40 INC2 INC2 INC2 INC2 41 IOR IOR IOR IOR IOR IOR 42 43 44 LAC LNK LSR LAC LNK LSR LSR LSR LSR LSR 45 MAC MAC Wn,Expr Wm*Wm,Acc,Wx,Wy,Wxd Wm*Wm,Acc,Wx,Wy,Wxd Wns,Wnd Ws,Wnd Ws,Wnd Ws,Wnd Expr Wn f f,WREG Ws,Wd f f,WREG Ws,Wd f f,WREG #lit10,Wn Wb,Ws,Wd Wb,#lit5,Wd Wso,#Slit4,Acc #lit14 f f,WREG Ws,Wd Wb,Wns,Wnd Wb,#lit5,Wnd Wm*Wn,Acc,Wx,Wxd,Wy,Wyd , AWB Wm*Wm,Acc,Wx,Wxd,Wy,Wyd f,Wn f f,WREG #lit16,Wn #lit8,Wn Wn,f Wso,Wdo WREG,f Wns,Wd Ws,Wnd Acc,Wx,Wxd,Wy,Wyd,AWB INSTRUCTION SET OVERVIEW (CONTINUED) Assembly Syntax Wm,Wn Wm,Wn Wm,Wn Wm,Wn Wm,Wn #lit14,Expr Description Signed 16/16-bit Integer Divide Signed 32/16-bit Integer Divide Unsigned 16/16-bit Integer Divide Unsigned 32/16-bit Integer Divide Signed 16/16-bit Fractional Divide Do code to PC + Expr, lit14 + 1 times Do code to PC + Expr, (Wn) + 1 times Euclidean Distance (no accumulate) Euclidean Distance Swap Wns with Wnd Find Bit Change from Left (MSb) Side Find First One from Left (MSb) Side Find First One from Right (LSb) Side Go to address Go to indirect f=f+1 WREG = f + 1 Wd = Ws + 1 f=f+2 WREG = f + 2 Wd = Ws + 2 f = f .IOR. WREG WREG = f .IOR. WREG Wd = lit10 .IOR. Wd Wd = Wb .IOR. Ws Wd = Wb .IOR. lit5 Load Accumulator Link Frame Pointer f = Logical Right Shift f WREG = Logical Right Shift f Wd = Logical Right Shift Ws Wnd = Logical Right Shift Wb by Wns Wnd = Logical Right Shift Wb by lit5 Multiply and Accumulate # of # of Words Cycles 1 1 1 1 1 2 2 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 18 18 18 18 18 2 2 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Status Flags Affected N,Z,C,OV N,Z,C,OV N,Z,C,OV N,Z,C,OV N,Z,C,OV None None OA,OB,OAB, SA,SB,SAB OA,OB,OAB, SA,SB,SAB None C C C None None C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z N,Z N,Z N,Z N,Z N,Z OA,OB,OAB, SA,SB,SAB None C,N,OV,Z C,N,OV,Z C,N,OV,Z N,Z N,Z OA,OB,OAB, SA,SB,SAB OA,OB,OAB, SA,SB,SAB None N,Z N,Z None None None None N,Z None None None MAC 46 MOV MOV MOV MOV MOV MOV.b MOV MOV MOV MOV.D MOV.D 47 MOVSAC MOVSAC Square and Accumulate Move f to Wn Move f to f Move f to WREG Move 16-bit literal to Wn Move 8-bit literal to Wn Move Wn to f Move Ws to Wd Move WREG to f Move Double from W(ns):W(ns + 1) to Wd Move Double from Ws to W(nd + 1):W(nd) Prefetch and store accumulator 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 1 DS70264B-page 184 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 19-2: Base Instr # 48 Assembly Mnemonic MPY INSTRUCTION SET OVERVIEW (CONTINUED) Assembly Syntax MPY Wm*Wn,Acc,Wx,Wxd,Wy,Wyd MPY Wm*Wm,Acc,Wx,Wxd,Wy,Wyd Description Multiply Wm by Wn to Accumulator Square Wm to Accumulator -(Multiply Wm by Wn) to Accumulator Multiply and Subtract from Accumulator # of # of Words Cycles 1 1 1 1 1 1 1 1 Status Flags Affected OA,OB,OAB, SA,SB,SAB OA,OB,OAB, SA,SB,SAB None OA,OB,OAB, SA,SB,SAB None None None None None None None OA,OB,OAB, SA,SB,SAB C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z None None None None None All None None None None WDTO,Sleep None None None None None None None None C,N,Z C,N,Z C,N,Z N,Z N,Z N,Z C,N,Z C,N,Z C,N,Z 49 50 MPY.N MSC MPY.N Wm*Wn,Acc,Wx,Wxd,Wy,Wyd MSC Wm*Wm,Acc,Wx,Wxd,Wy,Wyd , AWB Wb,Ws,Wnd Wb,Ws,Wnd Wb,Ws,Wnd Wb,Ws,Wnd Wb,#lit5,Wnd Wb,#lit5,Wnd f Acc f f,WREG Ws,Wd 51 MUL MUL.SS MUL.SU MUL.US MUL.UU MUL.SU MUL.UU MUL {Wnd + 1, Wnd} = signed(Wb) * signed(Ws) {Wnd + 1, Wnd} = signed(Wb) * unsigned(Ws) {Wnd + 1, Wnd} = unsigned(Wb) * signed(Ws) {Wnd + 1, Wnd} = unsigned(Wb) * unsigned(Ws) {Wnd + 1, Wnd} = signed(Wb) * unsigned(lit5) {Wnd + 1, Wnd} = unsigned(Wb) * unsigned(lit5) W3:W2 = f * WREG Negate Accumulator f=f+1 WREG = f + 1 Wd = Ws + 1 No Operation No Operation 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 2 1 1 2 2 1 1 1 3 (2) 3 (2) 3 (2) 1 1 1 1 1 1 1 1 1 52 NEG NEG NEG NEG NEG 53 54 NOP POP NOP NOPR POP POP POP.D POP.S f Wdo Wnd Pop f from Top-of-Stack (TOS) Pop from Top-of-Stack (TOS) to Wdo Pop from Top-of-Stack (TOS) to W(nd):W(nd + 1) Pop Shadow Registers Push f to Top-of-Stack (TOS) Push Wso to Top-of-Stack (TOS) Push W(ns):W(ns + 1) to Top-of-Stack (TOS) Push Shadow Registers #lit1 Go into Sleep or Idle mode Relative Call Computed Call Repeat Next Instruction lit14 + 1 times Repeat Next Instruction (Wn) + 1 times Software device Reset Return from interrupt 55 PUSH PUSH PUSH PUSH.D PUSH.S f Wso Wns 56 57 58 59 60 61 62 63 PWRSAV RCALL REPEAT RESET RETFIE RETLW RETURN RLC PWRSAV RCALL RCALL REPEAT REPEAT RESET RETFIE RETLW RETURN RLC RLC RLC f Wn Expr #lit14 Wn #lit10,Wn Return with literal in Wn Return from Subroutine f = Rotate Left through Carry f WREG = Rotate Left through Carry f Wd = Rotate Left through Carry Ws f = Rotate Left (No Carry) f WREG = Rotate Left (No Carry) f Wd = Rotate Left (No Carry) Ws f = Rotate Right through Carry f WREG = Rotate Right through Carry f Wd = Rotate Right through Carry Ws f,WREG Ws,Wd f f,WREG Ws,Wd f f,WREG Ws,Wd 64 RLNC RLNC RLNC RLNC 65 RRC RRC RRC RRC (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 185 dsPIC33FJ12GP201/202 TABLE 19-2: Base Instr # 66 Assembly Mnemonic RRNC RRNC RRNC RRNC 67 68 69 SAC SE SETM SAC SAC.R SE SETM SETM SETM 70 SFTAC SFTAC SFTAC 71 SL SL SL SL SL SL 72 SUB SUB SUB SUB SUB SUB SUB 73 SUBB SUBB SUBB SUBB SUBB SUBB 74 SUBR SUBR SUBR SUBR SUBR 75 SUBBR SUBBR SUBBR SUBBR SUBBR 76 77 78 79 80 81 82 SWAP TBLRDH TBLRDL TBLWTH TBLWTL ULNK XOR SWAP.b SWAP TBLRDH TBLRDL TBLWTH TBLWTL ULNK XOR XOR XOR XOR XOR 83 ZE ZE f f,WREG #lit10,Wn Wb,Ws,Wd Wb,#lit5,Wd Ws,Wnd INSTRUCTION SET OVERVIEW (CONTINUED) Assembly Syntax f f,WREG Ws,Wd Acc,#Slit4,Wdo Acc,#Slit4,Wdo Ws,Wnd f WREG Ws Acc,Wn Acc,#Slit6 f f,WREG Ws,Wd Wb,Wns,Wnd Wb,#lit5,Wnd Acc f f,WREG #lit10,Wn Wb,Ws,Wd Wb,#lit5,Wd f f,WREG #lit10,Wn Wb,Ws,Wd Wb,#lit5,Wd f f,WREG Wb,Ws,Wd Wb,#lit5,Wd f f,WREG Wb,Ws,Wd Wb,#lit5,Wd Wn Wn Ws,Wd Ws,Wd Ws,Wd Ws,Wd Description f = Rotate Right (No Carry) f WREG = Rotate Right (No Carry) f Wd = Rotate Right (No Carry) Ws Store Accumulator Store Rounded Accumulator Wnd = sign-extended Ws f = 0xFFFF WREG = 0xFFFF Ws = 0xFFFF Arithmetic Shift Accumulator by (Wn) Arithmetic Shift Accumulator by Slit6 f = Left Shift f WREG = Left Shift f Wd = Left Shift Ws Wnd = Left Shift Wb by Wns Wnd = Left Shift Wb by lit5 Subtract Accumulators f = f - WREG WREG = f - WREG Wn = Wn - lit10 Wd = Wb - Ws Wd = Wb - lit5 f = f - WREG - (C) WREG = f - WREG - (C) Wn = Wn - lit10 - (C) Wd = Wb - Ws - (C) Wd = Wb - lit5 - (C) f = WREG - f WREG = WREG - f Wd = Ws - Wb Wd = lit5 - Wb f = WREG - f - (C) WREG = WREG - f - (C) Wd = Ws - Wb - (C) Wd = lit5 - Wb - (C) Wn = nibble swap Wn Wn = byte swap Wn Read Prog<23:16> to Wd<7:0> Read Prog<15:0> to Wd Write Ws<7:0> to Prog<23:16> Write Ws to Prog<15:0> Unlink Frame Pointer f = f .XOR. WREG WREG = f .XOR. WREG Wd = lit10 .XOR. Wd Wd = Wb .XOR. Ws Wd = Wb .XOR. lit5 Wnd = Zero-extend Ws # of # of Words Cycles 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 1 1 1 1 1 1 1 Status Flags Affected N,Z N,Z N,Z None None C,N,Z None None None OA,OB,OAB, SA,SB,SAB OA,OB,OAB, SA,SB,SAB C,N,OV,Z C,N,OV,Z C,N,OV,Z N,Z N,Z OA,OB,OAB, SA,SB,SAB C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z C,DC,N,OV,Z None None None None None None None N,Z N,Z N,Z N,Z N,Z C,Z,N DS70264B-page 186 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 20.0 DEVELOPMENT SUPPORT 20.1 MPLAB Integrated Development Environment Software The PIC(R) microcontrollers are supported with a full range of hardware and software development tools: * Integrated Development Environment - MPLAB(R) IDE Software * Assemblers/Compilers/Linkers - MPASMTM Assembler - MPLAB C18 and MPLAB C30 C Compilers - MPLINKTM Object Linker/ MPLIBTM Object Librarian - MPLAB ASM30 Assembler/Linker/Library * Simulators - MPLAB SIM Software Simulator * Emulators - MPLAB ICE 2000 In-Circuit Emulator - MPLAB REAL ICETM In-Circuit Emulator * In-Circuit Debugger - MPLAB ICD 2 * Device Programmers - PICSTART(R) Plus Development Programmer - MPLAB PM3 Device Programmer - PICkitTM 2 Development Programmer * Low-Cost Demonstration and Development Boards and Evaluation Kits The MPLAB IDE software brings an ease of software development previously unseen in the 8/16-bit microcontroller market. The MPLAB IDE is a Windows(R) operating system-based application that contains: * A single graphical interface to all debugging tools - Simulator - Programmer (sold separately) - Emulator (sold separately) - In-Circuit Debugger (sold separately) * A full-featured editor with color-coded context * A multiple project manager * Customizable data windows with direct edit of contents * High-level source code debugging * Visual device initializer for easy register initialization * Mouse over variable inspection * Drag and drop variables from source to watch windows * Extensive on-line help * Integration of select third party tools, such as HI-TECH Software C Compilers and IAR C Compilers The MPLAB IDE allows you to: * Edit your source files (either assembly or C) * One touch assemble (or compile) and download to PIC MCU emulator and simulator tools (automatically updates all project information) * Debug using: - Source files (assembly or C) - Mixed assembly and C - Machine code MPLAB IDE supports multiple debugging tools in a single development paradigm, from the cost-effective simulators, through low-cost in-circuit debuggers, to full-featured emulators. This eliminates the learning curve when upgrading to tools with increased flexibility and power. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 187 dsPIC33FJ12GP201/202 20.2 MPASM Assembler 20.5 MPLAB ASM30 Assembler, Linker and Librarian The MPASM Assembler is a full-featured, universal macro assembler for all PIC MCUs. The MPASM Assembler generates relocatable object files for the MPLINK Object Linker, Intel(R) standard HEX files, MAP files to detail memory usage and symbol reference, absolute LST files that contain source lines and generated machine code and COFF files for debugging. The MPASM Assembler features include: * Integration into MPLAB IDE projects * User-defined macros to streamline assembly code * Conditional assembly for multi-purpose source files * Directives that allow complete control over the assembly process MPLAB ASM30 Assembler produces relocatable machine code from symbolic assembly language for dsPIC30F devices. MPLAB C30 C Compiler uses the assembler to produce its object file. The assembler generates relocatable object files that can then be archived or linked with other relocatable object files and archives to create an executable file. Notable features of the assembler include: * * * * * * Support for the entire dsPIC30F instruction set Support for fixed-point and floating-point data Command line interface Rich directive set Flexible macro language MPLAB IDE compatibility 20.6 MPLAB SIM Software Simulator 20.3 MPLAB C18 and MPLAB C30 C Compilers The MPLAB C18 and MPLAB C30 Code Development Systems are complete ANSI C compilers for Microchip's PIC18 and PIC24 families of microcontrollers and the dsPIC30 and dsPIC33 family of digital signal controllers. These compilers provide powerful integration capabilities, superior code optimization and ease of use not found with other compilers. For easy source level debugging, the compilers provide symbol information that is optimized to the MPLAB IDE debugger. The MPLAB SIM Software Simulator allows code development in a PC-hosted environment by simulating the PIC MCUs and dsPIC(R) DSCs on an instruction level. On any given instruction, the data areas can be examined or modified and stimuli can be applied from a comprehensive stimulus controller. Registers can be logged to files for further run-time analysis. The trace buffer and logic analyzer display extend the power of the simulator to record and track program execution, actions on I/O, most peripherals and internal registers. The MPLAB SIM Software Simulator fully supports symbolic debugging using the MPLAB C18 and MPLAB C30 C Compilers, and the MPASM and MPLAB ASM30 Assemblers. The software simulator offers the flexibility to develop and debug code outside of the hardware laboratory environment, making it an excellent, economical software development tool. 20.4 MPLINK Object Linker/ MPLIB Object Librarian The MPLINK Object Linker combines relocatable objects created by the MPASM Assembler and the MPLAB C18 C Compiler. It can link relocatable objects from precompiled libraries, using directives from a linker script. The MPLIB Object Librarian manages the creation and modification of library files of precompiled code. When a routine from a library is called from a source file, only the modules that contain that routine will be linked in with the application. This allows large libraries to be used efficiently in many different applications. The object linker/library features include: * Efficient linking of single libraries instead of many smaller files * Enhanced code maintainability by grouping related modules together * Flexible creation of libraries with easy module listing, replacement, deletion and extraction DS70264B-page 188 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 20.7 MPLAB ICE 2000 High-Performance In-Circuit Emulator 20.9 MPLAB ICD 2 In-Circuit Debugger The MPLAB ICE 2000 In-Circuit Emulator is intended to provide the product development engineer with a complete microcontroller design tool set for PIC microcontrollers. Software control of the MPLAB ICE 2000 In-Circuit Emulator is advanced by the MPLAB Integrated Development Environment, which allows editing, building, downloading and source debugging from a single environment. The MPLAB ICE 2000 is a full-featured emulator system with enhanced trace, trigger and data monitoring features. Interchangeable processor modules allow the system to be easily reconfigured for emulation of different processors. The architecture of the MPLAB ICE 2000 In-Circuit Emulator allows expansion to support new PIC microcontrollers. The MPLAB ICE 2000 In-Circuit Emulator system has been designed as a real-time emulation system with advanced features that are typically found on more expensive development tools. The PC platform and Microsoft(R) Windows(R) 32-bit operating system were chosen to best make these features available in a simple, unified application. Microchip's In-Circuit Debugger, MPLAB ICD 2, is a powerful, low-cost, run-time development tool, connecting to the host PC via an RS-232 or high-speed USB interface. This tool is based on the Flash PIC MCUs and can be used to develop for these and other PIC MCUs and dsPIC DSCs. The MPLAB ICD 2 utilizes the in-circuit debugging capability built into the Flash devices. This feature, along with Microchip's In-Circuit Serial ProgrammingTM (ICSPTM) protocol, offers costeffective, in-circuit Flash debugging from the graphical user interface of the MPLAB Integrated Development Environment. This enables a designer to develop and debug source code by setting breakpoints, single stepping and watching variables, and CPU status and peripheral registers. Running at full speed enables testing hardware and applications in real time. MPLAB ICD 2 also serves as a development programmer for selected PIC devices. 20.10 MPLAB PM3 Device Programmer The MPLAB PM3 Device Programmer is a universal, CE compliant device programmer with programmable voltage verification at VDDMIN and VDDMAX for maximum reliability. It features a large LCD display (128 x 64) for menus and error messages and a modular, detachable socket assembly to support various package types. The ICSPTM cable assembly is included as a standard item. In Stand-Alone mode, the MPLAB PM3 Device Programmer can read, verify and program PIC devices without a PC connection. It can also set code protection in this mode. The MPLAB PM3 connects to the host PC via an RS-232 or USB cable. The MPLAB PM3 has high-speed communications and optimized algorithms for quick programming of large memory devices and incorporates an SD/MMC card for file storage and secure data applications. 20.8 MPLAB REAL ICE In-Circuit Emulator System MPLAB REAL ICE In-Circuit Emulator System is Microchip's next generation high-speed emulator for Microchip Flash DSC(R) and MCU devices. It debugs and programs PIC(R) and dsPIC(R) Flash microcontrollers with the easy-to-use, powerful graphical user interface of the MPLAB Integrated Development Environment (IDE), included with each kit. The MPLAB REAL ICE probe is connected to the design engineer's PC using a high-speed USB 2.0 interface and is connected to the target with either a connector compatible with the popular MPLAB ICD 2 system (RJ11) or with the new high speed, noise tolerant, lowvoltage differential signal (LVDS) interconnection (CAT5). MPLAB REAL ICE is field upgradeable through future firmware downloads in MPLAB IDE. In upcoming releases of MPLAB IDE, new devices will be supported, and new features will be added, such as software breakpoints and assembly code trace. MPLAB REAL ICE offers significant advantages over competitive emulators including low-cost, full-speed emulation, real-time variable watches, trace analysis, complex breakpoints, a ruggedized probe interface and long (up to three meters) interconnection cables. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 189 dsPIC33FJ12GP201/202 20.11 PICSTART Plus Development Programmer The PICSTART Plus Development Programmer is an easy-to-use, low-cost, prototype programmer. It connects to the PC via a COM (RS-232) port. MPLAB Integrated Development Environment software makes using the programmer simple and efficient. The PICSTART Plus Development Programmer supports most PIC devices in DIP packages up to 40 pins. Larger pin count devices, such as the PIC16C92X and PIC17C76X, may be supported with an adapter socket. The PICSTART Plus Development Programmer is CE compliant. 20.13 Demonstration, Development and Evaluation Boards A wide variety of demonstration, development and evaluation boards for various PIC MCUs and dsPIC DSCs allows quick application development on fully functional systems. Most boards include prototyping areas for adding custom circuitry and provide application firmware and source code for examination and modification. The boards support a variety of features, including LEDs, temperature sensors, switches, speakers, RS-232 interfaces, LCD displays, potentiometers and additional EEPROM memory. The demonstration and development boards can be used in teaching environments, for prototyping custom circuits and for learning about various microcontroller applications. In addition to the PICDEMTM and dsPICDEMTM demonstration/development board series of circuits, Microchip has a line of evaluation kits and demonstration software for analog filter design, KEELOQ(R) security ICs, CAN, IrDA(R), PowerSmart(R) battery management, SEEVAL(R) evaluation system, Sigma-Delta ADC, flow rate sensing, plus many more. Check the Microchip web page (www.microchip.com) and the latest "Product Selector Guide" (DS00148) for the complete list of demonstration, development and evaluation kits. 20.12 PICkit 2 Development Programmer The PICkitTM 2 Development Programmer is a low-cost programmer and selected Flash device debugger with an easy-to-use interface for programming many of Microchip's baseline, mid-range and PIC18F families of Flash memory microcontrollers. The PICkit 2 Starter Kit includes a prototyping development board, twelve sequential lessons, software and HI-TECH's PICCTM Lite C compiler, and is designed to help get up to speed quickly using PIC(R) microcontrollers. The kit provides everything needed to program, evaluate and develop applications using Microchip's powerful, mid-range Flash memory family of microcontrollers. DS70264B-page 190 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 21.0 ELECTRICAL CHARACTERISTICS This section provides an overview of dsPIC33FJ12GP201/202 electrical characteristics. Additional information will be provided in future revisions of this document as it becomes available. Absolute maximum ratings for the dsPIC33FJ12GP201/202 family are listed below. Exposure to these maximum rating conditions for extended periods can affect device reliability. Functional operation of the device at these or any other conditions above the parameters indicated in the operation listings of this specification is not implied. Absolute Maximum Ratings(1) Ambient temperature under bias.............................................................................................................-40C to +125C Storage temperature .............................................................................................................................. -65C to +150C Voltage on VDD with respect to VSS ......................................................................................................... -0.3V to +4.0V Voltage on any combined analog and digital pin and MCLR, with respect to VSS ......................... -0.3V to (VDD + 0.3V) Voltage on any digital-only pin with respect to VSS .................................................................................. -0.3V to +5.6V Voltage on VDDCORE with respect to VSS ................................................................................................ 2.25V to 2.75V Maximum current out of VSS pin ...........................................................................................................................300 mA Maximum current into VDD pin(2) ...........................................................................................................................250 mA Maximum output current sunk by any I/O pin(3) ........................................................................................................4 mA Maximum output current sourced by any I/O pin(3) ...................................................................................................4 mA Maximum current sunk by all ports .......................................................................................................................200 mA Maximum current sourced by all ports(2) ...............................................................................................................200 mA Note 1: Stresses above those listed under "Absolute Maximum Ratings" can cause permanent damage to the device. This is a stress rating only, and functional operation of the device at those or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods can affect device reliability. 2: Maximum allowable current is a function of device maximum power dissipation (see Table 21-2). 3: Exceptions are CLKOUT, which is able to sink/source 25 mA, and the VREF+, VREF-, SCLx, SDAx, PGCx and PGDx pins, which are able to sink/source 12 mA. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 191 dsPIC33FJ12GP201/202 21.1 DC Characteristics OPERATING MIPS VS. VOLTAGE VDD Range (in Volts) 3.0-3.6V 3.0-3.6V Temp Range (in C) -40C to +85C -40C to +125C Max MIPS dsPIC33FJ12GP201/202 40 35 TABLE 21-1: Characteristic TABLE 21-2: THERMAL OPERATING CONDITIONS Rating Symbol TJ TA TJ TA Min -40 -40 -40 -40 Typ -- -- -- -- Max +125 +85 +140 +125 Unit C C C C Industrial Temperature Devices Operating Junction Temperature Range Operating Ambient Temperature Range Extended Temperature Devices Operating Junction Temperature Range Operating Ambient Temperature Range Power Dissipation: Internal chip power dissipation: PINT = VDD x (IDD - IOH) I/O Pin Power Dissipation: I/O = ({VDD - VOH} x IOH) + (VOL x IOL) Maximum Allowed Power Dissipation PDMAX (TJ - TA)/JA W PD PINT + PI/O W TABLE 21-3: THERMAL PACKAGING CHARACTERISTICS Characteristic Symbol Typ 66 60 63.6 80.2 32 Max -- -- -- -- -- Unit C/W C/W C/W C/W C/W Notes 1 1 1 1 1 Package Thermal Resistance, 18-pin PDIP Package Thermal Resistance, 28-pin SPDIP Package Thermal Resistance, 18-pin SOIC Package Thermal Resistance, 28-pin SOIC Package Thermal Resistance, 28-pin QFN Note 1: JA JA JA JA JA Junction to ambient thermal resistance, Theta-JA (JA) numbers are achieved by package simulations. DS70264B-page 192 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 21-4: DC TEMPERATURE AND VOLTAGE SPECIFICATIONS Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic Min Typ(1) Max Units Conditions DC CHARACTERISTICS Param Symbol No. Operating Voltage DC10 DC12 DC16 Supply Voltage VDD VDR VPOR RAM Data Retention Voltage(2) VDD Start Voltage to ensure internal Power-on Reset signal VDD Rise Rate to ensure internal Power-on Reset signal VDD Core(3) Internal regulator voltage 3.0 1.1 -- -- 1.3 -- 3.6 1.8 VSS V V V Industrial and Extended DC17 SVDD 0.03 -- -- V/ms 0-3.0V in 0.1s DC18 VCORE 2.25 -- 2.75 V Voltage is dependent on load, temperature and VDD Note 1: 2: 3: Data in "Typ" column is at 3.3V, 25C unless otherwise stated. This is the limit to which VDD can be lowered without losing RAM data. These parameters are characterized but not tested in manufacturing. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 193 dsPIC33FJ12GP201/202 TABLE 21-5: DC CHARACTERISTICS: OPERATING CURRENT (IDD) Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Max Units Conditions DC CHARACTERISTICS Parameter No. DC20d DC20a DC20b DC20c DC21d DC21a DC21b DC21c DC22d DC22a DC22b DC22c DC23d DC23a DC23b DC23c DC24d DC24a DC24b DC24c Note 1: 2: Typical(1) Operating Current (IDD)(2) 24 27 27 27 30 31 32 33 35 38 38 39 47 48 48 48 56 56 54 54 30 30 30 35 40 40 45 45 50 50 55 55 70 70 70 70 90 90 90 80 mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA -40C +25C +85C +125C -40C +25C +85C +125C -40C +25C +85C +125C -40C +25C +85C +125C -40C +25C +85C +125C 3.3V 35 MIPS 3.3V 40 MIPS 3.3V 30 MIPS 3.3V 20 MIPS 3.3V 16 MIPS 3.3V 10 MIPS Data in "Typical" column is at 3.3V, 25C unless otherwise stated. The supply current is mainly a function of the operating voltage and frequency. Other factors, such as I/O pin loading and switching rate, oscillator type, internal code execution pattern and temperature, also have an impact on the current consumption. The test conditions for all IDD measurements are as follows: OSC1 driven with external square wave from rail to rail. All I/O pins are configured as inputs and pulled to VSS. MCLR = VDD, WDT and FSCM are disabled. CPU, SRAM, program memory and data memory are operational. No peripheral modules are operating; however, every peripheral is being clocked (PMD bits are all zeroed). DS70264B-page 194 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 21-6: DC CHARACTERISTICS: IDLE CURRENT (IIDLE) Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Max Units Conditions DC CHARACTERISTICS Parameter No. DC40d DC40a DC40b DC40c DC41d DC41a DC41b DC41c DC42d DC42a DC42b DC42c DC43d DC43a DC43b DC43c DC44d DC44a DC44b DC44c Note 1: 2: Typical(1) Idle Current (IIDLE): Core OFF Clock ON Base Current(2) 3 3 3 3 4 4 5 5 6 6 7 7 9 9 9 9 10 10 10 10 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA -40C +25C +85C +125C -40C +25C +85C 125C -40C +25C +85C +125C -40C +25C +85C +125C -40C +25C +85C +125C 3.3V 35 MIPS 3.3V 40 MIPS 3.3V 30 MIPS 3.3V 20 MIPS 3.3V 16 MIPS 3.3V 10 MIPS Data in "Typical" column is at 3.3V, 25C unless otherwise stated. Base IIDLE current is measured with core off, clock on and all modules turned off. Peripheral Module Disable SFR registers are zeroed. All I/O pins are configured as inputs and pulled to VSS. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 195 dsPIC33FJ12GP201/202 TABLE 21-7: DC CHARACTERISTICS: POWER-DOWN CURRENT (IPD) Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Max Units Conditions DC CHARACTERISTICS Parameter No. DC60d DC60a DC60b DC60c DC61d DC61a DC61b DC61c Note 1: 2: 3: 4: Typical(1) Power-Down Current (IPD)(2) 55 63 85 146 8 10 12 13 500 500 500 1 13 15 20 25 A A A mA A A A A -40C +25C +85C +125C -40C +25C +85C +125C 3.3V Watchdog Timer Current: IWDT(3) 3.3V Base Power-Down Current(3,4) Data in the Typical column is at 3.3V, 25C unless otherwise stated. Base IPD is measured with all peripherals and clocks shut down. All I/Os are configured as inputs and pulled to VSS. WDT, etc., are all switched off. The current is the additional current consumed when the module is enabled. This current should be added to the base IPD current. These currents are measured on the device containing the most memory in this family. TABLE 21-8: DC CHARACTERISTICS: DOZE CURRENT (IDOZE) Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Max 35 30 30 50 30 30 50 30 30 50 30 30 Doze Ratio 1:2 1:64 1:128 1:2 1:64 1:128 1:2 1:64 1:128 1:2 1:64 1:128 Units mA mA mA mA mA mA mA mA mA mA mA mA +125C 3.3V 35 MIPS +85C 3.3V 40 MIPS +25C 3.3V 40 MIPS -40C 3.3V 40 MIPS Conditions DC CHARACTERISTICS Parameter No. DC73a DC73f DC73g DC70a DC70f DC70g DC71a DC71f DC71g DC72a DC72f DC72g Note 1: Typical(1) 11 11 11 11 11 11 12 12 12 12 12 12 Data in the Typical column is at 3.3V, 25C unless otherwise stated. DS70264B-page 196 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 21-9: DC CHARACTERISTICS: I/O PIN INPUT SPECIFICATIONS Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic Input Low Voltage I/O pins MCLR OSC1 (XT mode) OSC1 (HS mode) SDAx, SCLx SDAx, SCLx VIH DI20 Input High Voltage I/O pins: with analog functions digital-only MCLR OSC1 (XT mode) OSC1 (HS mode) SDAx, SCLx SDAx, SCLx ICNPU DI30 IIL DI50 DI51 DI51a DI51b Input Leakage I/O ports Analog Input Pins Analog Input Pins Analog Input Pins Current(2)(3) -- -- -- -- -- -- -- -- 2 2 2 3.5 A A A A VSS VPIN VDD, Pin at high-impedance VSS VPIN VDD, Pin at high-impedance Analog pins shared with external reference pins VSS VPIN VDD, Pin at high-impedance, -40C TA +125C Analog pins shared with external reference pins, -40C TA +125C VSS VPIN VDD VSS VPIN VDD, XT and HS modes CNx Pull-up Current 50 250 400 A VDD = 3.3V, VPIN = VSS 0.8 VDD 0.8 VDD 0.8 VDD 0.7 VDD 0.7 VDD 0.7 VDD 0.8 VDD -- -- -- -- -- -- -- VDD 5.5 VDD VDD VDD VDD VDD V V V V V V V SMbus disabled SMbus enabled VSS VSS VSS VSS VSS VSS -- -- -- -- -- -- 0.2 VDD 0.2 VDD 0.2 VDD 0.2 VDD 0.3 VDD 0.2 VDD V V V V V V SMbus disabled SMbus enabled Min Typ(1) Max Units Conditions DC CHARACTERISTICS Param Symbol No. VIL DI10 DI15 DI16 DI17 DI18 DI19 DI25 DI26 DI27 DI28 DI29 DI51c Analog Input Pins -- -- 8 A DI55 DI56 Note 1: 2: MCLR OSC1 -- -- -- -- 2 2 A A 3: Data in "Typ" column is at 3.3V, 25C unless otherwise stated. The leakage current on the MCLR pin is strongly dependent on the applied voltage level. The specified levels represent normal operating conditions. Higher leakage current may be measured at different input voltages. Negative current is defined as current sourced by the pin. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 197 dsPIC33FJ12GP201/202 TABLE 21-10: DC CHARACTERISTICS: I/O PIN OUTPUT SPECIFICATIONS DC CHARACTERISTICS Param Symbol No. VOL DO10 DO16 VOH DO20 DO26 Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic Output Low Voltage I/O ports OSC2/CLKO Output High Voltage I/O ports OSC2/CLKO 2.40 2.41 -- -- -- -- V V IOH = -2.3 mA, VDD = 3.3V IOH = -1.3 mA, VDD = 3.3V -- -- -- -- 0.4 0.4 V V IOL = 2mA, VDD = 3.3V IOL = 2mA, VDD = 3.3V Min Typ Max Units Conditions TABLE 21-11: ELECTRICAL CHARACTERISTICS: BOR DC CHARACTERISTICS Param No. BO10 Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic BOR Event on VDD transition high-to-low BOR event is tied to VDD core voltage decrease Min 2.40 Typ -- Max 2.55 Units V Conditions Symbol VBOR Note 1: Parameters are for design guidance only and are not tested in manufacturing. DS70264B-page 198 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 21-12: DC CHARACTERISTICS: PROGRAM MEMORY DC CHARACTERISTICS Param Symbol No. D130 D131 D132B D134 D135 D136 D137 D138 Note 1: EP VPR VPEW TRETD IDDP TRW TPE TWW Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic Program Flash Memory Cell Endurance VDD for Read VDD for Self-Timed Write Characteristic Retention Supply Current during Programming Row Write Time Page Erase Time Word Write Cycle Time 10,000 VMIN VMIN 20 -- -- -- 20 -- -- -- -- 10 1.6 20 -- -- 3.6 3.6 -- -- -- -- 40 E/W -40C to +125C V V VMIN = Minimum operating voltage VMIN = Minimum operating voltage Min Typ(1) Max Units Conditions Year Provided no other specifications are violated (-40C to +125C) mA ms ms s Data in "Typ" column is at 3.3V, 25C unless otherwise stated. TABLE 21-13: INTERNAL VOLTAGE REGULATOR SPECIFICATIONS Operating Conditions: -40C < TA < +85C (unless otherwise stated) Param No. Symbol CEFC Characteristics External Filter Capacitor Value Min 1 Typ 10 Max -- Units F Comments Capacitor must be low series resistance (< 5 ohms) (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 199 dsPIC33FJ12GP201/202 21.2 AC Characteristics and Timing Parameters The information contained in this section defines dsPIC33FJ12GP201/202 AC characteristics and timing parameters. TABLE 21-14: TEMPERATURE AND VOLTAGE SPECIFICATIONS - AC Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Operating voltage VDD range as described in Section 21.0 "Electrical Characteristics". AC CHARACTERISTICS FIGURE 21-1: LOAD CONDITIONS FOR DEVICE TIMING SPECIFICATIONS Load Condition 2 - for OSC2 Load Condition 1 - for all pins except OSC2 VDD/2 RL Pin VSS CL Pin VSS CL RL = 464 CL = 50 pF for all pins except OSC2 15 pF for OSC2 output TABLE 21-15: CAPACITIVE LOADING REQUIREMENTS ON OUTPUT PINS Param Symbol No. DO50 COSC2 Characteristic OSC2/SOSC2 pin Min -- Typ -- Max 15 Units pF Conditions In XT and HS modes when external clock is used to drive OSC1 EC mode In I2CTM mode DO56 DO58 CIO CB All I/O pins and OSC2 SCLx, SDAx -- -- -- -- 50 400 pF pF DS70264B-page 200 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 FIGURE 21-2: EXTERNAL CLOCK TIMING Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 OSC1 OS20 OS30 OS25 OS30 OS31 OS31 CLKO OS41 OS40 TABLE 21-16: EXTERNAL CLOCK TIMING REQUIREMENTS AC CHARACTERISTICS Param No. OS10 Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic External CLKI Frequency (External clocks allowed only in EC and ECPLL modes) Oscillator Crystal Frequency Min DC Typ(1) -- Max 40 Units MHz Conditions EC Symb FIN 3.5 10 -- 12.5 25 0.375 x TOSC -- -- -- -- -- -- -- -- -- -- 5.2 5.2 10 40 33 DC DC 0.625 x TOSC 20 -- -- MHz MHz kHz ns ns ns ns ns ns XT HS SOSC OS20 OS25 OS30 OS31 OS40 OS41 Note 1: 2: TOSC TCY TosL, TosH TosR, TosF TckR TckF TOSC = 1/FOSC Instruction Cycle Time(2) External Clock in (OSC1) High or Low Time External Clock in (OSC1) Rise or Fall Time CLKO Rise Time(3) CLKO Fall Time(3) EC EC 3: Data in "Typ" column is at 3.3V, 25C unless otherwise stated. Instruction cycle period (TCY) equals two times the input oscillator time-base period. All specified values are based on characterization data for that particular oscillator type under standard operating conditions with the device executing code. Exceeding these specified limits can result in an unstable oscillator operation and/or higher than expected current consumption. All devices are tested to operate at "min." values with an external clock applied to the OSC1/CLKI pin. When an external clock input is used, the "max." cycle time limit is "DC" (no clock) for all devices. Measurements are taken in EC mode. The CLKO signal is measured on the OSC2 pin. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 201 dsPIC33FJ12GP201/202 TABLE 21-17: PLL CLOCK TIMING SPECIFICATIONS (VDD = 3.0V TO 3.6V) AC CHARACTERISTICS Param No. OS50 Symbol FPLLI Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic PLL Voltage Controlled Oscillator (VCO) Input Frequency Range On-Chip VCO System Frequency PLL Start-up Time (Lock Time) CLKO Stability (Jitter) Min 0.8 Typ(1) -- Max 8 Units MHz Conditions ECPLL and XTPLL modes OS51 OS52 OS53 Note 1: FSYS TLOCK DCLK 100 0.9 -3 -- 1.5 0.5 200 3.1 3 MHz ms % Measured over 100 ms period Data in "Typ" column is at 3.3V, 25C unless otherwise stated. TABLE 21-18: AC CHARACTERISTICS: INTERNAL RC ACCURACY AC CHARACTERISTICS Param No. F20 Note 1: 2: FRC FRC Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for industrial -40C TA +125C for Extended Min Typ Max Units Conditions Characteristic Internal FRC Accuracy @ 7.3728 MHz(1,2) -2 -5 -- -- +2 +5 % % -40C TA +85C -40C TA +125C VDD = 3.0-3.6V VDD = 3.0-3.6V Frequency calibrated at 25C and 3.3V. TUN bits can be used to compensate for temperature drift. FRC is set to initial frequency of 7.37 MHz (2%) at 25C. TABLE 21-19: INTERNAL RC ACCURACY AC CHARACTERISTICS Param No. F21 LPRC LPRC Note 1: Characteristic LPRC @ 32.768 kHz(1) -20 -70 6 -- +20 +20 % % -40C TA +85C -40C TA +125C VDD = 3.0-3.6V VDD = 3.0-3.6V Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Min Typ Max Units Conditions Change of LPRC frequency as VDD changes. DS70264B-page 202 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 FIGURE 21-3: CLKO AND I/O TIMING CHARACTERISTICS I/O Pin (Input) DI35 DI40 I/O Pin (Output) Old Value DO31 DO32 Note: Refer to Figure 21-1 for load conditions. New Value TABLE 21-20: I/O TIMING REQUIREMENTS AC CHARACTERISTICS Param No. DO31 DO32 DI35 DI40 Note 1: Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic Port Output Rise Time Port Output Fall Time INTx Pin High or Low Time (output) CNx High or Low Time (input) Min -- -- 20 2 Typ(1) 10 10 -- -- Max 25 25 -- -- Units ns ns ns TCY Conditions -- -- -- -- Symbol TIOR TIOF TINP TRBP Data in "Typ" column is at 3.3V, 25C unless otherwise stated. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 203 dsPIC33FJ12GP201/202 FIGURE 21-4: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP TIMER TIMING CHARACTERISTICS VDD MCLR Internal POR PWRT Time-out OSC Time-out Internal Reset Watchdog Timer Reset SY12 SY10 SY11 SY30 SY13 I/O Pins SY35 FSCM Delay Note: Refer to Figure 21-1 for load conditions. SY20 SY13 DS70264B-page 204 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 21-21: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER TIMING REQUIREMENTS AC CHARACTERISTICS Param Symbol No. SY10 SY11 TMCL TPWRT Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic(1) MCLR Pulse Width (low) Power-up Timer Period Min 2 -- Typ(2) -- 2 4 8 16 32 64 128 10 0.72 2.1 1024 TOSC 500 Max -- -- Units s ms Conditions -40C to +85C -40C to +85C User programmable SY12 SY13 SY20 SY30 SY35 Note 1: 2: TPOR TIOZ TWDT1 TOST TFSCM Power-on Reset Delay I/O High-Impedance from MCLR Low or Watchdog Timer Reset Watchdog Timer Time-out Period (No Prescaler) Oscillator Start-up Time Fail-Safe Clock Monitor Delay 3 0.68 1.7 -- -- 30 1.2 2.6 -- 900 s s ms -- s -40C to +85C VDD = 3V, -40C to +85C TOSC = OSC1 period -40C to +85C These parameters are characterized but not tested in manufacturing. Data in "Typ" column is at 3.3V, 25C unless otherwise stated. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 205 dsPIC33FJ12GP201/202 FIGURE 21-5: TIMER1, 2 AND 3 EXTERNAL CLOCK TIMING CHARACTERISTICS TxCK Tx10 Tx15 OS60 TMRx Tx11 Tx20 Note: Refer to Figure 21-1 for load conditions. TABLE 21-22: TIMER1 EXTERNAL CLOCK TIMING REQUIREMENTS(1) AC CHARACTERISTICS Param No. TA10 Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic TxCK High Time Synchronous, no prescaler Synchronous, with prescaler Asynchronous TA11 TTXL TxCK Low Time Synchronous, no prescaler Synchronous, with prescaler Asynchronous TA15 TTXP TxCK Input Period Synchronous, no prescaler Synchronous, with prescaler Asynchronous OS60 Ft1 SOSC1/T1CK Oscillator Input frequency Range (oscillator enabled by setting bit TCS (T1CON<1>)) Min 0.5 TCY + 20 10 10 0.5 TCY + 20 10 10 TCY + 40 Greater of: 20 ns or (TCY + 40)/N 20 DC Typ -- -- -- -- -- -- -- -- Max -- -- -- -- -- -- -- -- Units ns ns ns ns ns ns ns -- N = prescale value (1, 8, 64, 256) Must also meet parameter TA15 Conditions Must also meet parameter TA15 Symbol TTXH -- -- -- 50 ns kHz TA20 Note 1: TCKEXTMRL Delay from External TxCK Clock Edge to Timer Increment Timer1 is a Type A. 0.5 TCY 1.5 TCY -- DS70264B-page 206 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 21-23: TIMER2 EXTERNAL CLOCK TIMING REQUIREMENTS AC CHARACTERISTICS Param No. TB10 Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic TxCK High Time Synchronous, no prescaler Synchronous, with prescaler TB11 TtxL TxCK Low Time Synchronous, no prescaler Synchronous, with prescaler TB15 TtxP TxCK Input Period Synchronous, no prescaler Synchronous, with prescaler TB20 TCKEXTMRL Symbol TtxH Min 0.5 TCY + 20 10 0.5 TCY + 20 10 TCY + 40 Greater of: 20 ns or (TCY + 40)/N 0.5 TCY Typ -- -- -- -- -- Max -- -- -- -- -- Units ns ns ns ns ns Conditions Must also meet parameter TB15 Must also meet parameter TB15 N = prescale value (1, 8, 64, 256) Delay from External TxCK Clock Edge to Timer Increment -- 1.5 TCY -- TABLE 21-24: TIMER3 EXTERNAL CLOCK TIMING REQUIREMENTS AC CHARACTERISTICS Param No. TC10 TC11 TC15 Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic TxCK High Time TxCK Low Time Synchronous Synchronous Min 0.5 TCY + 20 0.5 TCY + 20 TCY + 40 Greater of: 20 ns or (TCY + 40)/N 0.5 TCY -- 1.5 TCY -- Typ -- -- -- Max -- -- -- Units ns ns ns Conditions Must also meet parameter TC15 Must also meet parameter TC15 N = prescale value (1, 8, 64, 256) Symbol TtxH TtxL TtxP TxCK Input Period Synchronous, no prescaler Synchronous, with prescaler TC20 TCKEXTMRL Delay from External TxCK Clock Edge to Timer Increment (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 207 dsPIC33FJ12GP201/202 FIGURE 21-6: INPUT CAPTURE (CAPx) TIMING CHARACTERISTICS ICx IC10 IC15 Note: Refer to Figure 21-1 for load conditions. IC11 TABLE 21-25: INPUT CAPTURE TIMING REQUIREMENTS AC CHARACTERISTICS Param No. IC10 IC11 IC15 Note 1: Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic(1) ICx Input Low Time ICx Input High Time ICx Input Period No Prescaler With Prescaler TccH TccP No Prescaler With Prescaler Min 0.5 TCY + 20 10 0.5 TCY + 20 10 (TCY + 40)/N Max -- -- -- -- -- Units ns ns ns ns ns N = prescale value (1, 4, 16) Conditions Symbol TccL These parameters are characterized but not tested in manufacturing. FIGURE 21-7: OUTPUT COMPARE MODULE (OCx) TIMING CHARACTERISTICS OCx (Output Compare or PWM Mode) OC11 OC10 Note: Refer to Figure 21-1 for load conditions. TABLE 21-26: OUTPUT COMPARE MODULE TIMING REQUIREMENTS AC CHARACTERISTICS Param Symbol No. OC10 OC11 Note 1: TccF TccR Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Min -- -- Typ -- -- Max -- -- Units ns ns Conditions See parameter D032 See parameter D031 Characteristic(1) OCx Output Fall Time OCx Output Rise Time These parameters are characterized but not tested in manufacturing. DS70264B-page 208 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 FIGURE 21-8: OC/PWM MODULE TIMING CHARACTERISTICS OC20 OCFA/OCFB OC15 OCx TABLE 21-27: SIMPLE OC/PWM MODE TIMING REQUIREMENTS AC CHARACTERISTICS Param No. OC15 OC20 Note 1: Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic(1) Fault Input to PWM I/O Change Fault Input Pulse Width Min -- 50 Typ -- -- Max 50 -- Units ns ns Conditions -- -- Symbol TFD TFLT These parameters are characterized but not tested in manufacturing. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 209 dsPIC33FJ12GP201/202 FIGURE 21-9: SCKx (CKP = 0) SP11 SCKx (CKP = 1) SP35 SP20 MSb SP31 SDIx MSb In SP40 SP41 Bit 14 - - - -1 Bit 14 - - - - - -1 SP30 LSb In SP21 LSb SP10 SP21 SP20 SPIx MODULE MASTER MODE (CKE = 0) TIMING CHARACTERISTICS SDOx Note: Refer to Figure 21-1 for load conditions. TABLE 21-28: SPIx MASTER MODE (CKE = 0) TIMING REQUIREMENTS AC CHARACTERISTICS Param No. SP10 SP11 SP20 SP21 SP30 SP31 SP35 SP40 SP41 Note 1: 2: 3: 4: Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic(1) SCKx Output Low Time(3) SCKx Output High Time(3) SCKx Output Fall Time(4) (4) Symbol TscL TscH TscF TscR TdoF TdoR TscH2doV, TscL2doV TdiV2scH, TdiV2scL TscH2diL, TscL2diL Min TCY/2 TCY/2 -- -- -- -- -- 23 30 Typ(2) -- -- -- -- -- -- 6 -- -- Max -- -- -- -- -- -- 20 -- -- Units ns ns ns ns ns ns ns ns ns Conditions -- -- See parameter D032 See parameter D031 See parameter D032 See parameter D031 -- -- -- SCKx Output Rise Time(4) SDOx Data Output Fall Time SDOx Data Output Rise Time(4) SDOx Data Output Valid after SCKx Edge Setup Time of SDIx Data Input to SCKx Edge Hold Time of SDIx Data Input to SCKx Edge These parameters are characterized but not tested in manufacturing. Data in "Typ" column is at 3.3V, 25C unless otherwise stated. The minimum clock period for SCKx is 100 ns. Therefore, the clock generated in Master mode must not violate this specification. Assumes 50 pF load on all SPIx pins. DS70264B-page 210 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 FIGURE 21-10: SPIx MODULE MASTER MODE (CKE = 1) TIMING CHARACTERISTICS SP36 SCKX (CKP = 0) SP11 SCKX (CKP = 1) SP10 SP21 SP20 SP35 SP20 LSb SP21 SDOX MSb SP40 Bit 14 - - - - - -1 SP30,SP31 Bit 14 - - - -1 SDIX MSb In SP41 LSb In Note: Refer to Figure 21-1 for load conditions. TABLE 21-29: SPIx MODULE MASTER MODE (CKE = 1) TIMING REQUIREMENTS AC CHARACTERISTICS Param No. SP10 SP11 SP20 SP21 SP30 SP31 SP35 SP36 SP40 Note 1: 2: 3: 4: Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic(1) SCKx Output Low Time SCKx Output High Time SCKx Output Fall Time SCKx Output Rise Time SDOx Data Output Fall Time SDOx Data Output Rise Time Min TCY/2 TCY/2 -- -- -- -- -- 30 23 Typ(2) -- -- -- -- -- -- 6 -- -- Max -- -- -- -- -- -- 20 -- -- Units ns ns ns ns ns ns ns ns ns Conditions See Note 3 See Note 3 See parameter D032 and Note 4 See parameter D031 and Note 4 See parameter D032 and Note 4 See parameter D031 and Note 4 -- -- -- Symbol TscL TscH TscF TscR TdoF TdoR TscH2doV, SDOx Data Output Valid after TscL2doV SCKx Edge TdoV2sc, SDOx Data Output Setup to TdoV2scL First SCKx Edge TdiV2scH, Setup Time of SDIx Data TdiV2scL Input to SCKx Edge These parameters are characterized but not tested in manufacturing. Data in "Typ" column is at 3.3V, 25C unless otherwise stated. The minimum clock period for SCKx is 100 ns. The clock generated in Master mode must not violate this specification. Assumes 50 pF load on all SPIx pins. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 211 dsPIC33FJ12GP201/202 AC CHARACTERISTICS Param No. SP41 Note 1: 2: 3: 4: Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic(1) Hold Time of SDIx Data Input to SCKx Edge Min 30 Typ(2) -- Max -- Units ns Conditions -- Symbol TscH2diL, TscL2diL These parameters are characterized but not tested in manufacturing. Data in "Typ" column is at 3.3V, 25C unless otherwise stated. The minimum clock period for SCKx is 100 ns. The clock generated in Master mode must not violate this specification. Assumes 50 pF load on all SPIx pins. FIGURE 21-11: SSX SPIx MODULE SLAVE MODE (CKE = 0) TIMING CHARACTERISTICS SP50 SCKX (CKP = 0) SP71 SCKX (CKP = 1) SP35 SDOX MSb SP72 SP70 SP73 SP52 SP72 SP73 Bit 14 - - - - - -1 SP30,SP31 LSb SP51 LSb In SDIX MSb In SP41 SP40 Bit 14 - - - -1 Note: Refer to Figure 21-1 for load conditions. TABLE 21-30: SPIx MODULE SLAVE MODE (CKE = 0) TIMING REQUIREMENTS AC CHARACTERISTICS Param No. SP70 SP71 SP72 SP73 Note 1: 2: 3: Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic(1) SCKx Input Low Time SCKx Input High Time SCKx Input Fall Time(3) SCKx Input Rise Time(3) Min 30 30 -- -- Typ(2) -- -- 10 10 Max -- -- 25 25 Units ns ns ns ns Conditions -- -- -- -- Symbol TscL TscH TscF TscR These parameters are characterized but not tested in manufacturing. Data in "Typ" column is at 3.3V, 25C unless otherwise stated. Assumes 50 pF load on all SPIx pins. DS70264B-page 212 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 21-30: SPIx MODULE SLAVE MODE (CKE = 0) TIMING REQUIREMENTS (CONTINUED) AC CHARACTERISTICS Param No. SP30 SP31 SP35 SP40 SP41 SP50 SP51 SP52 Note 1: 2: 3: Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic(1) SDOx Data Output Fall Time(3) SDOx Data Output Rise Time (3) Symbol TdoF TdoR Min -- -- -- 20 20 120 10 1.5 TCY +40 Typ(2) -- -- -- -- -- -- -- -- Max -- -- 30 -- -- -- 50 -- Units ns ns ns ns ns ns ns ns Conditions See parameter D032 See parameter D031 -- -- -- -- -- -- TscH2doV, SDOx Data Output Valid after TscL2doV SCKx Edge TdiV2scH, Setup Time of SDIx Data Input TdiV2scL to SCKx Edge TscH2diL, TscL2diL Hold Time of SDIx Data Input to SCKx Edge TssL2scH, SSx to SCKx or SCKx Input TssL2scL TssH2doZ SSx to SDOx Output High-Impedance(3) TscH2ssH SSx after SCKx Edge TscL2ssH These parameters are characterized but not tested in manufacturing. Data in "Typ" column is at 3.3V, 25C unless otherwise stated. Assumes 50 pF load on all SPIx pins. FIGURE 21-12: SSx SPIx MODULE SLAVE MODE (CKE = 1) TIMING CHARACTERISTICS SP60 SP50 SCKx (CKP = 0) SP71 SCKx (CKP = 1) SP35 SP52 SDOx MSb Bit 14 - - - - - -1 SP30,SP31 SDIx SDI MSb In SP41 SP40 Note: Refer to Figure 21-1 for load conditions. Bit 14 - - - -1 LSb In SP72 LSb SP70 SP73 SP52 SP72 SP73 SP51 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 213 dsPIC33FJ12GP201/202 TABLE 21-31: SPIx MODULE SLAVE MODE (CKE = 1) TIMING REQUIREMENTS AC CHARACTERISTICS Param No. SP70 SP71 SP72 SP73 SP30 SP31 SP35 SP40 SP41 SP50 SP51 SP52 SP60 Note 1: 2: 3: 4: Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic(1) SCKx Input Low Time SCKx Input High Time SCKx Input Fall Time(3) Time(3) SCKx Input Rise Time(3) SDOx Data Output Fall SDOx Data Output Rise Time(3) Min 30 30 -- -- -- -- -- 20 20 120 10 1.5 TCY + 40 -- Typ(2) -- -- 10 10 -- -- -- -- -- -- -- -- -- Max -- -- 25 25 -- -- 30 -- -- -- 50 -- 50 Units ns ns ns ns ns ns ns ns ns ns ns ns ns Conditions -- -- -- -- See parameter D032 See parameter D031 -- -- -- -- -- -- -- Symbol TscL TscH TscF TscR TdoF TdoR TscH2doV, SDOx Data Output Valid after TscL2doV SCKx Edge TdiV2scH, Setup Time of SDIx Data Input TdiV2scL to SCKx Edge TscH2diL, Hold Time of SDIx Data Input TscL2diL to SCKx Edge TssL2scH, SSx to SCKx or SCKx TssL2scL Input TssH2doZ SSx to SDOX Output High-Impedance(4) TscH2ssH SSx after SCKx Edge TscL2ssH TssL2doV SDOx Data Output Valid after SSx Edge These parameters are characterized but not tested in manufacturing. Data in "Typ" column is at 3.3V, 25C unless otherwise stated. The minimum clock period for SCKx is 100 ns. The clock generated in Master mode must not violate this specification. Assumes 50 pF load on all SPIx pins. DS70264B-page 214 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 FIGURE 21-13: I2Cx BUS START/STOP BITS TIMING CHARACTERISTICS (MASTER MODE) SCLx IM31 IM30 IM33 IM34 SDAx Start Condition Note: Refer to Figure 21-1 for load conditions. Stop Condition FIGURE 21-14: I2Cx BUS DATA TIMING CHARACTERISTICS (MASTER MODE) IM20 IM11 IM10 IM11 IM26 IM21 SCLx IM10 IM25 IM33 SDAx In IM40 IM40 IM45 SDAx Out Note: Refer to Figure 21-1 for load conditions. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 215 dsPIC33FJ12GP201/202 TABLE 21-32: I2Cx BUS DATA TIMING REQUIREMENTS (MASTER MODE) AC CHARACTERISTICS Param Symbol No. IM10 Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic Min(1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) -- 20 + 0.1 CB -- -- 20 + 0.1 CB -- 250 100 40 0 0 0.2 TCY/2 (BRG + 1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) TCY/2 (BRG + 1) -- -- -- 4.7 1.3 0.5 -- Max -- -- -- -- -- -- 300 300 100 1000 300 300 -- -- -- -- 0.9 -- -- -- -- -- -- -- -- -- -- -- -- -- 3500 1000 400 -- -- -- 400 Units s s s s s s ns ns ns ns ns ns ns ns ns s s s s s s s s s s s s ns ns ns ns ns ns s s s pF -- -- -- Time the bus must be free before a new transmission can start -- Only relevant for Repeated Start condition After this period the first clock pulse is generated -- -- -- CB is specified to be from 10 to 400 pF Conditions -- -- -- -- -- -- CB is specified to be from 10 to 400 pF TLO:SCL Clock Low Time 100 kHz mode 400 kHz mode 1 MHz mode(2) IM11 THI:SCL Clock High Time 100 kHz mode 400 kHz mode 1 MHz mode(2) IM20 TF:SCL SDAx and SCLx 100 kHz mode Fall Time 400 kHz mode 1 MHz mode(2) SDAx and SCLx 100 kHz mode Rise Time 400 kHz mode 1 MHz mode(2) 100 kHz mode 400 kHz mode 1 MHz mode(2) 100 kHz mode 400 kHz mode 1 MHz mode(2) 100 kHz mode 400 kHz mode 1 MHz mode(2) 100 kHz mode 400 kHz mode 1 MHz mode(2) 100 kHz mode 400 kHz mode 1 MHz mode(2) 100 kHz mode 400 kHz mode 1 MHz mode(2) 100 kHz mode 400 kHz mode 1 MHz mode (2) IM21 TR:SCL IM25 TSU:DAT Data Input Setup Time THD:DAT Data Input Hold Time TSU:STA Start Condition Setup Time IM26 IM30 IM31 THD:STA Start Condition Hold Time TSU:STO Stop Condition Setup Time THD:STO Stop Condition Hold Time IM33 IM34 IM40 TAA:SCL Output Valid From Clock IM45 TBF:SDA Bus Free Time 100 kHz mode 400 kHz mode 1 MHz mode(2) IM50 Note 1: CB Bus Capacitive Loading 2: BRG is the value of the I2C Baud Rate Generator. Refer to Section 19. "Inter-Integrated Circuit (I2CTM)" in the "dsPIC33F Family Reference Manual". Please see the Microchip web site (www.microchip.com) for the latest dsPIC33F Family Reference Manual sections. Maximum pin capacitance = 10 pF for all I2Cx pins (for 1 MHz mode only). DS70264B-page 216 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 FIGURE 21-15: I2Cx BUS START/STOP BITS TIMING CHARACTERISTICS (SLAVE MODE) SCLx IS31 IS30 IS33 IS34 SDAx Start Condition Stop Condition FIGURE 21-16: I2Cx BUS DATA TIMING CHARACTERISTICS (SLAVE MODE) IS20 IS11 IS10 IS30 IS26 IS21 SCLx IS31 IS25 IS33 SDAx In IS40 IS40 IS45 SDAx Out (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 217 dsPIC33FJ12GP201/202 TABLE 21-33: I2Cx BUS DATA TIMING REQUIREMENTS (SLAVE MODE) AC CHARACTERISTICS Param Symbol IS10 Characteristic 100 kHz mode 400 kHz mode 1 MHz mode(1) IS11 THI:SCL Clock High Time 100 kHz mode 400 kHz mode 1 MHz mode(1) IS20 TF:SCL SDAx and SCLx Fall Time SDAx and SCLx Rise Time 100 kHz mode 400 kHz mode 1 MHz mode(1) IS21 TR:SCL 100 kHz mode 400 kHz mode 1 MHz mode(1) IS25 TSU:DAT Data Input Setup Time THD:DAT Data Input Hold Time TSU:STA Start Condition Setup Time THD:STA Start Condition Hold Time TSU:STO Stop Condition Setup Time THD:ST O Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Min 4.7 1.3 0.5 4.0 0.6 0.5 -- 20 + 0.1 CB -- -- 20 + 0.1 CB -- 250 100 100 0 0 0 4.7 0.6 0.25 4.0 0.6 0.25 4.7 0.6 0.6 4000 600 250 0 0 0 4.7 1.3 0.5 -- 3500 1000 350 -- -- -- 400 Max -- -- -- -- -- -- 300 300 100 1000 300 300 -- -- -- 0 0.9 0.3 -- -- -- -- -- -- -- -- -- -- -- Units s s s s s s ns ns ns ns ns ns ns ns ns s s s s s s s s s s s s ns ns ns ns ns ns s s s pF Time the bus must be free before a new transmission can start -- -- -- -- After this period, the first clock pulse is generated Only relevant for Repeated Start condition -- -- CB is specified to be from 10 to 400 pF Conditions Device must operate at a minimum of 1.5 MHz Device must operate at a minimum of 10 MHz -- Device must operate at a minimum of 1.5 MHz Device must operate at a minimum of 10 MHz -- CB is specified to be from 10 to 400 pF TLO:SCL Clock Low Time 100 kHz mode 400 kHz mode 1 MHz mode(1) 100 kHz mode 400 kHz mode 1 MHz mode(1) 100 kHz mode 400 kHz mode 1 MHz mode(1) 100 kHz mode 400 kHz mode 1 MHz mode(1) 100 kHz mode 400 kHz mode 1 MHz mode(1) 100 kHz mode 400 kHz mode 1 MHz mode(1) 100 kHz mode 400 kHz mode 1 MHz mode(1) 100 kHz mode 400 kHz mode 1 MHz mode(1) IS26 IS30 IS31 IS33 IS34 Stop Condition Hold Time IS40 TAA:SCL Output Valid From Clock TBF:SDA Bus Free Time IS45 IS50 Note 1: CB Bus Capacitive Loading Maximum pin capacitance = 10 pF for all I2Cx pins (for 1 MHz mode only). DS70264B-page 218 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 21-34: ADC MODULE SPECIFICATIONS AC CHARACTERISTICS Param Symbol No. AD01 AVDD Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic Min. Typ Max. Units Conditions Device Supply Module VDD Supply Greater of VDD - 0.3 or 3.0 VSS - 0.3 AVSS + 2.7 3.0 VREFL Reference Voltage Low AVSS 0 VREF IREF Absolute Reference Voltage Current Drain 3.0 -- -- Lesser of VDD + 0.3 or 3.6 VSS + 0.3 AVDD 3.6 AVDD - 2.7 0 3.6 549 1 VREFH AVDD VREFH V -- AD02 AD05 AD05a AD06 AD06a AD07 AD08 AVSS VREFH Module VSS Supply Reference Voltage High -- -- -- -- -- -- 389 .001 -- -- -- V V V V V V A A V V V See Note 2 -- Reference Inputs VREFH = AVDD VREFL = AVSS = 0 See Note 2 VREFH = AVDD VREFL = AVSS = 0 VREF = VREFH - VREFL ADC operating ADC off VREFL = 0, VREFH = 3.6V See Note 1 AVSS = 0, AVDD = 3.6V See Note 1 This voltage reflects Sample and Hold Channels 0, 1, 2, and 3 (CH0-CH3), positive input This voltage reflects Sample and Hold Channels 0, 1, 2, and 3 (CH0-CH3), negative input 10-bit 12-bit Analog Input AD10 VINHVINL Full-Scale Input Span VREFL AVSS AD12 VINH Input Voltage Range VINH VINL AD13 VINL Input Voltage Range VINL VREFL -- AVSS + 1V V AD17 Note 1: 2: RIN Recommended Impedance of Analog Voltage Source -- -- 200 200 The ADC conversion result never decreases with an increase in the input voltage, and has no missing codes. These parameters are not characterized or tested in manufacturing. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 219 dsPIC33FJ12GP201/202 TABLE 21-35: ADC MODULE SPECIFICATIONS (12-BIT MODE) AC CHARACTERISTICS Param No. Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic Min. Typ Max. Units Conditions Symbol ADC Accuracy (12-bit Mode) - Measurements with external VREF+/VREFAD20a Nr AD21a INL AD22a DNL AD23a GERR AD24a EOFF AD25a -- AD20a Nr AD21a INL AD22a DNL AD23a GERR AD24a EOFF AD25a -- AD30a THD AD31a SINAD AD32a SFDR AD33a FNYQ AD34a ENOB Note 1: Resolution Integral Nonlinearity Differential Nonlinearity Gain Error Offset Error Monotonicity(1) Resolution Integral Nonlinearity Differential Nonlinearity Gain Error Offset Error Monotonicity(1) Total Harmonic Distortion Signal to Noise and Distortion Spurious Free Dynamic Range Input Signal Bandwidth Effective Number of Bits -1 >-1 2 2 -- -77 59 63 -- 10.95 -1 >-1 1.25 -2 -- 12 data bits -- -- 1.5 -1.5 -- 12 data bits -- -- 3 3 -- -69 63 72 -- 11.1 +1 <1 7 5 -- -61 64 79 250 -- +1 <1 3 -1.25 -- bits LSb LSb LSb LSb -- bits LSb LSb LSb LSb -- dB dB dB kHz bits VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V Guaranteed -- -- -- -- -- VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V Guaranteed ADC Accuracy (12-bit Mode) - Measurements with internal VREF+/VREF- Dynamic Performance (12-bit Mode) The ADC conversion result never decreases with an increase in the input voltage, and has no missing codes. DS70264B-page 220 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 TABLE 21-36: ADC MODULE SPECIFICATIONS (10-BIT MODE) AC CHARACTERISTICS Param No. Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic Min. Typ Max. Units Conditions Symbol ADC Accuracy (10-bit Mode) - Measurements with external VREF+/VREFAD20b Nr AD21b INL AD22b DNL AD23b GERR AD24b EOFF AD25b -- AD20b Nr AD21b INL AD22b DNL AD23b GERR AD24b EOFF AD25b -- AD30b THD AD31b SINAD AD32b SFDR AD33b FNYQ AD34b ENOB Note 1: Resolution Integral Nonlinearity Differential Nonlinearity Gain Error Offset Error Monotonicity(1) Resolution Integral Nonlinearity Differential Nonlinearity Gain Error Offset Error Monotonicity(1) Total Harmonic Distortion Signal to Noise and Distortion Spurious Free Dynamic Range Input Signal Bandwidth Effective Number of Bits -1 >-1 1 1 -- -- -- -- -- 9.1 -1 >-1 1 1 -- 10 data bits -- -- 3 2 -- 10 data bits -- -- 5 2 -- -64 57 67 -- 9.7 +1 <1 6 3 -- -67 58 71 550 9.8 +1 <1 6 5 -- bits LSb LSb LSb LSb -- bits LSb LSb LSb LSb -- dB dB dB kHz bits VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V Guaranteed -- -- -- -- -- VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V VINL = AVSS = VREFL = 0V, AVDD = VREFH = 3.6V Guaranteed ADC Accuracy (10-bit Mode) - Measurements with internal VREF+/VREF- Dynamic Performance (10-bit Mode) The ADC conversion result never decreases with an increase in the input voltage, and has no missing codes. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 221 dsPIC33FJ12GP201/202 FIGURE 21-17: ADC CONVERSION (12-BIT MODE) TIMING CHARACTERISTICS (ASAM = 0, SSRC<2:0> = 000) AD50 ADCLK Instruction Execution SAMP AD61 AD60 TSAMP DONE AD1IF AD55 Set SAMP Clear SAMP 1 2 3 4 5 6 5 - Convert bit 11. 6 - Convert bit 10. 7 - Convert bit 1. 8 - Convert bit 0. 7 8 9 1 - Software sets AD1CON. SAMP to start sampling. 2 - Sampling starts after discharge period. TSAMP is described in Section 28. "10/12-bit ADC without DMA" in the "dsPIC33F Family Reference Manual". Please see the Microchip web site for the latest dsPIC33F Family Reference Manual sections. 3 - Software clears AD1CON. SAMP to start conversion. 4 - Sampling ends, conversion sequence starts. 9 - One TAD for end of conversion. TABLE 21-37: ADC CONVERSION (12-BIT MODE) TIMING REQUIREMENTS AC CHARACTERISTICS Param No. AD50 AD51 Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic Min. Typ Max. Units Conditions Symbol Clock Parameters(1) TAD tRC ADC Clock Period ADC Internal RC Oscillator Period Conversion Time Throughput Rate Sample Time Conversion Start from Sample Trigger(2) Sample Start from Setting Sample (SAMP) bit(2) Conversion Completion to Sample Start (ASAM = 1)(2) Time to Stabilize Analog Stage from ADC Off to ADC On(2) 117.6 -- -- 250 -- -- ns ns Conversion Rate AD55 AD56 AD57 AD60 AD61 AD62 AD63 Note 1: 2: tCONV FCNV TSAMP tPCS tPSS tCSS tDPU -- -- 3 TAD -- 0.5 TAD -- 1 14 TAD -- -- 1.0 TAD -- 0.5 TAD -- 500 -- -- 1.5 TAD -- 5 ns Ksps -- -- -- -- s Auto Convert Trigger not selected -- -- -- Timing Parameters Because the sample caps will eventually lose charge, clock rates below 10 kHz can affect linearity performance, especially at elevated temperatures. These parameters are characterized but not tested in manufacturing. DS70264B-page 222 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 FIGURE 21-18: ADC CONVERSION (10-BIT MODE) TIMING CHARACTERISTICS (CHPS<1:0> = 01, SIMSAM = 0, ASAM = 0, SSRC<2:0> = 000) AD50 ADCLK Instruction Execution Set SAMP SAMP AD61 AD60 TSAMP DONE AD1IF Buffer(0) Buffer(1) AD55 AD55 Clear SAMP 1 2 3 4 5 6 7 8 5 6 7 8 1 - Software sets AD1CON. SAMP to start sampling. 2 - Sampling starts after discharge period. TSAMP is described in Section 28. "10/12-bit ADC without DMA" in the "dsPIC33F Family Reference Manual". Please see the Microchip web site for the latest dsPIC33F Family Reference Manual sections. 3 - Software clears AD1CON. SAMP to start conversion. 4 - Sampling ends, conversion sequence starts. 5 - Convert bit 9. 6 - Convert bit 8. 7 - Convert bit 0. 8 - One TAD for end of conversion. FIGURE 21-19: AD50 ADCLK Instruction Set ADON Execution SAMP ADC CONVERSION (10-BIT MODE) TIMING CHARACTERISTICS (CHPS<1:0> = 01, SIMSAM = 0, ASAM = 1, SSRC<2:0> = 111, SAMC<4:0> = 00001) TSAMP AD1IF AD55 AD55 TSAMP AD55 DONE 1 2 3 4 5 6 7 3 4 5 6 8 1 - Software sets ADxCON. ADON to start AD operation. 4 - Convert bit 8. 2 - Sampling starts after discharge period. 5 - Convert bit 0. TSAMP is described in Section 28. "10/12-bit ADC without DMA" 6 - One TAD for end of conversion. in the "dsPIC33F Family Reference Manual". Please refer to the Microchip web site for the latest dsPIC33F Family 7 - Begin conversion of next channel. Reference Manual sections. 3 - Convert bit 9. 8 - Sample for time specified by SAMC<4:0>. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 223 dsPIC33FJ12GP201/202 TABLE 21-38: ADC CONVERSION (10-BIT MODE) TIMING REQUIREMENTS AC CHARACTERISTICS Param Symbol No. AD50 AD51 AD55 AD56 AD57 AD60 TAD tRC tCONV FCNV TSAMP tPCS Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40C TA +85C for Industrial -40C TA +125C for Extended Characteristic Min. Typ(1) Max. Units Conditions Clock Parameters(2) ADC Clock Period ADC Internal RC Oscillator Period Conversion Time Throughput Rate Sample Time Conversion Start from Sample Trigger(1) Sample Start from Setting Sample (SAMP) bit(1) Conversion Completion to Sample Start (ASAM = 1)(1) Time to Stabilize Analog Stage from ADC Off to ADC On(1) 65 -- -- -- 2 TAD -- -- 250 12 TAD -- -- 1.0 TAD -- -- -- 1.1 -- -- ns ns -- Msps -- -- Auto-Convert Trigger (SSRC<2:0> = 111) not selected -- -- -- Conversion Rate Timing Parameters AD61 AD62 AD63 Note 1: 2: tPSS tCSS tDPU 0.5 TAD -- 1 -- 0.5 TAD -- 1.5 TAD -- 5 -- -- s These parameters are characterized but not tested in manufacturing. Because the sample caps will eventually lose charge, clock rates below 10 kHz can affect linearity performance, especially at elevated temperatures. DS70264B-page 224 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 22.0 22.1 PACKAGING INFORMATION Package Marking Information 18-Lead PDIP XXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXX YYWWNNN Example dsPIC33FJ12GP 201-E/P e3 0730235 28-Lead SPDIP XXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXX YYWWNNN Example dsPIC33FJ12GP 202-E/SP e3 0730235 18-Lead SOIC XXXXXXXXXXXX XXXXXXXXXXXX XXXXXXXXXXXX YYWWNNN Example dsPIC33FJ12 GP201-E/SO e3 0730235 28-Lead SOIC (.300") XXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXX YYWWNNN Example dsPIC33FJ12GP 202-E/SO e3 0730235 28-Lead QFN Example XXXXXXXX XXXXXXXX YYWWNNN 33FJ12GP 202EML e3 0730235 Legend: XX...X Y YY WW NNN * Note: e3 Customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week `01') Alphanumeric traceability code Pb-free JEDEC designator for Matte Tin (Sn) This package is Pb-free. The Pb-free JEDEC designator ( e3 ) can be found on the outer packaging for this package. If the full Microchip part number cannot be marked on one line, it is carried over to the next line, thus limiting the number of available characters for customer-specific information. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 225 dsPIC33FJ12GP201/202 22.2 Package Details 18-Lead Plastic Dual In-Line (P) - 300 mil Body [PDIP] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging N NOTE 1 E1 1 2 3 D E A A2 L A1 b1 b e Units Dimension Limits Number of Pins Pitch Top to Seating Plane Molded Package Thickness Base to Seating Plane Shoulder to Shoulder Width Molded Package Width Overall Length Tip to Seating Plane Lead Thickness Upper Lead Width Lower Lead Width Overall Row Spacing N e A A2 A1 E E1 D L c b1 b eB - .115 .015 .300 .240 .880 .115 .008 .045 .014 - MIN INCHES NOM 18 .100 BSC - .130 - .310 .250 .900 .130 .010 .060 .018 - .210 .195 - .325 .280 .920 .150 .014 .070 .022 MAX c eB .430 Notes: 1. Pin 1 visual index feature may vary, but must be located within the hatched area. 2. Significant Characteristic. 3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010" per side. 4. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. Microchip Technology Drawing C04-007B DS70264B-page 226 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 28-Lead Skinny Plastic Dual In-Line (SP) - 300 mil Body [SPDIP] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging N NOTE 1 E1 1 2 3 D E A A2 L c A1 b1 b e eB Units Dimension Limits Number of Pins Pitch Top to Seating Plane Molded Package Thickness Base to Seating Plane Shoulder to Shoulder Width Molded Package Width Overall Length Tip to Seating Plane Lead Thickness Upper Lead Width Lower Lead Width Overall Row Spacing N e A A2 A1 E E1 D L c b1 b eB - .120 .015 .290 .240 1.345 .110 .008 .040 .014 - MIN INCHES NOM 28 .100 BSC - .135 - .310 .285 1.365 .130 .010 .050 .018 - .200 .150 - .335 .295 1.400 .150 .015 .070 .022 MAX .430 Notes: 1. Pin 1 visual index feature may vary, but must be located within the hatched area. 2. Significant Characteristic. 3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010" per side. 4. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. Microchip Technology Drawing C04-070B (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 227 dsPIC33FJ12GP201/202 18-Lead Plastic Small Outline (SO) - Wide, 7.50 mm Body [SOIC] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging D N E E1 NOTE 1 1 23 e b h c h A A2 A1 L L1 Units Dimension Limits Number of Pins Pitch Overall Height Molded Package Thickness Standoff Overall Width Molded Package Width Overall Length Chamfer (optional) Foot Length Footprint Foot Angle Lead Thickness Lead Width Mold Draft Angle Top Mold Draft Angle Bottom N e A A2 A1 E E1 D h L L1 c b 0 0.20 0.31 5 5 0.25 0.40 - 2.05 0.10 MIN MILLMETERS NOM 18 1.27 BSC - - - 10.30 BSC 7.50 BSC 11.55 BSC - - 1.40 REF - - - - - 8 0.33 0.51 15 0.75 1.27 2.65 - 0.30 MAX 15 Notes: 1. Pin 1 visual index feature may vary, but must be located within the hatched area. 2. Significant Characteristic. 3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15 mm per side. 4. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. REF: Reference Dimension, usually without tolerance, for information purposes only. Microchip Technology Drawing C04-051B DS70264B-page 228 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 28-Lead Plastic Small Outline (SO) - Wide, 7.50 mm Body [SOIC] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging D N E E1 NOTE 1 123 e b h h c A A2 L A1 L1 Units Dimension Limits Number of Pins Pitch Overall Height Molded Package Thickness Standoff Overall Width Molded Package Width Overall Length Chamfer (optional) Foot Length Footprint Foot Angle Top Lead Thickness Lead Width Mold Draft Angle Top Mold Draft Angle Bottom N e A A2 A1 E E1 D h L L1 c b 0 0.18 0.31 5 5 0.25 0.40 - 2.05 0.10 MIN MILLIMETERS NOM 28 1.27 BSC - - - 10.30 BSC 7.50 BSC 17.90 BSC - - 1.40 REF - - - - - 8 0.33 0.51 15 0.75 1.27 2.65 - 0.30 MAX 15 Notes: 1. Pin 1 visual index feature may vary, but must be located within the hatched area. 2. Significant Characteristic. 3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15 mm per side. 4. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. REF: Reference Dimension, usually without tolerance, for information purposes only. Microchip Technology Drawing C04-052B (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 229 dsPIC33FJ12GP201/202 28-Lead Plastic Quad Flat, No Lead Package (ML) - 6x6 mm Body [QFN] with 0.55 mm Contact Length Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging D D2 EXPOSED PAD e E E2 2 1 2 1 N NOTE 1 TOP VIEW BOTTOM VIEW L K b N A A3 A1 Units Dimension Limits Number of Pins Pitch Overall Height Standoff Contact Thickness Overall Width Exposed Pad Width Overall Length Exposed Pad Length Contact Width Contact Length Contact-to-Exposed Pad N e A A1 A3 E E2 D D2 b L K 3.65 0.23 0.50 0.20 3.65 0.80 0.00 MIN MILLIMETERS NOM 28 0.65 BSC 0.90 0.02 0.20 REF 6.00 BSC 3.70 6.00 BSC 3.70 0.30 0.55 - 4.20 0.35 0.70 - 4.20 1.00 0.05 MAX Notes: 1. Pin 1 visual index feature may vary, but must be located within the hatched area. 2. Package is saw singulated. 3. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. REF: Reference Dimension, usually without tolerance, for information purposes only. Microchip Technology Drawing C04-105B DS70264B-page 230 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 APPENDIX A: REVISION HISTORY Revision A (January 2007) Initial release of this document. Revision B (May 2007) This revision includes the following corrections and updates: * Minor typographical and formatting corrections throughout the data sheet text. * New content: - Addition of bullet item (16-word conversion result buffer) (see Section 17.1 "Key Features") * Figure update: - Oscillator System Diagram (see Figure 7-1) - WDT Block Diagram (see Figure 18-2) * Equation update: - Serial Clock Rate (see Equation 15-1) * Register updates: - Clock Divisor Register (see Register 7-2) - PLL Feedback Divisor Register (see Register 7-3) - Peripheral Pin Select Input Registers (see Register 9-1 through Register 9-9) - ADC1 Input Channel 1, 2, 3 Select Register (see Register 17-4) - ADC1 Input Channel 0 Select Register (see Register 17-5) * Table updates: - CNEN2 (see Table 3-2 and Table 3-3) - Reset Flag Bit Operation (see Table 5-1) - Configuration Bit Values for Clock Operation (see Table 7-1) * Operation value update: - IOLOCK set/clear operation (see Section 9.4.4.1 "Control Register Lock") * The following tables in Section 21.0 "Electrical Characteristics" have been updated with preliminary values: - Updated Max MIPS for -40C to +125C Temp Range (see Table 21-1) - Added new parameters for +125C, and updated Typical and Max values for most parameters (see Table 21-5) - Added new parameters for +125C, and updated Typical and Max values for most parameters (see Table 21-6) - Added new parameters for +125C, and updated Typical and Max values for most parameters (see Table 21-7) - Added new parameters for +125C, and updated Typical and Max values for most parameters (see Table 21-8) - Updated parameter DI51, added parameter DI51a (see Table 21-9) - Added Note 1 (see Table 21-11) - Updated parameter OS30 (see Table 21-16) - Updated parameter OS52 (see Table 21-17) - Updated parameter F20, added Note 2 (see Table 21-18) - Updated parameter F21 (see Table 21-19) - Updated parameter TA15 (see Table 21-22) - Updated parameter TB15 (see Table 21-23) - Updated parameter TC15 (see Table 21-24) - Updated parameter IC15 (see Table 21-25) - Updated parameters AD05, AD06, AD07, AD08, AD10, and AD11; added parameters AD05a and AD06a; added Note 2; modified ADC Accuracy headings to include measurement information (see Table 21-34) - Separated the ADC Module Specifications table into three tables (see Table 21-34, Table 21-35, and Table 21-36) - Updated parameter AD50 (see Table 21-37) - Updated parameters AD50 and AD57 (see Table 21-38) (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 231 dsPIC33FJ12GP201/202 NOTES: DS70264B-page 232 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 INDEX A A/D Converter ................................................................... 161 Initialization ............................................................... 161 Key Features............................................................. 161 AC Characteristics ............................................................ 200 Internal RC Accuracy ................................................ 202 Load Conditions ........................................................ 200 ADC Module ADC1 Register Map .............................................. 34, 35 Alternate Vector Table (AIVT) ............................................. 59 Arithmetic Logic Unit (ALU)................................................. 17 Assembler MPASM Assembler................................................... 188 Automatic Clock Stretch.................................................... 145 Receive Mode ........................................................... 145 Transmit Mode .......................................................... 145 CPU Clocking System ........................................................ 88 Options ....................................................................... 88 Selection..................................................................... 88 Customer Change Notification Service............................. 237 Customer Notification Service .......................................... 237 Customer Support............................................................. 237 D Data Accumulators and Adder/Subtracter .......................... 19 Data Space Write Saturation ...................................... 21 Overflow and Saturation ............................................. 19 Round Logic ............................................................... 20 Write Back .................................................................. 20 Data Address Space........................................................... 25 Alignment.................................................................... 25 Memory Map for dsPIC33FJ12GP201/202 Devices with 1 KB RAM...................................... 26 Near Data Space ........................................................ 25 Software Stack ........................................................... 38 Width .......................................................................... 25 DC Characteristics............................................................ 192 I/O Pin Input Specifications ...................................... 197 I/O Pin Output Specifications.................................... 198 Idle Current (IDOZE) .................................................. 196 Idle Current (IIDLE) .................................................... 195 Operating Current (IDD) ............................................ 194 Power-Down Current (IPD)........................................ 196 Program Memory...................................................... 199 Temperature and Voltage Specifications.................. 193 Development Support ....................................................... 187 DSP Engine ........................................................................ 17 Multiplier ..................................................................... 19 B Barrel Shifter ....................................................................... 21 Bit-Reversed Addressing .................................................... 41 Example ...................................................................... 42 Implementation ........................................................... 41 Sequence Table (16-Entry)......................................... 42 Block Diagrams 16-bit Timer1 Module ................................................ 119 A/D Module ............................................................... 162 Connections for On-Chip Voltage Regulator............. 176 DSP Engine ................................................................ 18 dsPIC33FJ12GP201/202 .............................................. 8 dsPIC33FJ12GP201/202 CPU Core........................... 12 dsPIC33FJ12GP201/202 Oscillator System ............... 87 dsPIC33FJ12GP201/202 PLL..................................... 89 Input Capture ............................................................ 127 Output Compare ....................................................... 132 PLL.............................................................................. 89 Reset System.............................................................. 53 Shared Port Structure ................................................. 99 SPI ............................................................................ 136 Timer2 (16-bit) .......................................................... 123 Timer2/3 (32-bit) ....................................................... 122 UART ........................................................................ 153 Watchdog Timer (WDT) ............................................ 177 E Electrical Characteristics .................................................. 191 AC............................................................................. 200 Equations A/D Conversion Clock Period ................................... 163 Calculating the PWM Period..................................... 130 Calculation for Maximum PWM Resolution .............. 130 Device Operating Frequency...................................... 88 Relationship Between Device and SPI Clock Speed ............................................................... 138 Serial Clock Rate...................................................... 143 UART Baud Rate with BRGH = 0 ............................. 154 UART Baud Rate with BRGH = 1 ............................. 154 Errata .................................................................................... 6 C C Compilers MPLAB C18 .............................................................. 188 MPLAB C30 .............................................................. 188 Clock Switching................................................................... 95 Enabling ...................................................................... 95 Sequence.................................................................... 95 Code Examples Erasing a Program Memory Page............................... 51 Initiating a Programming Sequence............................ 52 Loading Write Buffers ................................................. 52 Port Write/Read ........................................................ 100 PWRSAV Instruction Syntax....................................... 97 Code Protection ........................................................ 173, 178 Configuration Bits.............................................................. 173 Description (Table).................................................... 174 Configuration Register Map .............................................. 173 Configuring Analog Port Pins ............................................ 100 CPU Control Register .......................................................... 14 F Flash Program Memory ...................................................... 47 Control Registers........................................................ 48 Operations .................................................................. 48 Programming Algorithm .............................................. 51 RTSP Operation ......................................................... 48 Table Instructions ....................................................... 47 Flexible Configuration ....................................................... 173 FSCM Delay for Crystal and PLL Clock Sources .................. 57 Device Resets ............................................................ 57 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 233 dsPIC33FJ12GP201/202 I I/O Ports .............................................................................. 99 Parallel I/O (PIO)......................................................... 99 Write/Read Timing .................................................... 100 I2C Addresses ................................................................. 145 Baud Rate Generator ................................................ 143 General Call Address Support .................................. 145 Interrupts ................................................................... 143 IPMI Support ............................................................. 145 Master Mode Operation Clock Arbitration................................................ 146 Multi-Master Communication, Bus Collision and Bus Arbitration ................................... 146 Operating Modes ...................................................... 143 Registers ................................................................... 143 Slave Address Masking ............................................ 145 Slope Control ............................................................ 146 Software Controlled Clock Stretching (STREN = 1).. 145 I2C Module I2C1 Register Map ...................................................... 32 In-Circuit Debugger ........................................................... 178 In-Circuit Emulation........................................................... 173 In-Circuit Serial Programming (ICSP) ....................... 173, 178 Infrared Support Built-in IrDA Encoder and Decoder ........................... 155 External IrDA, IrDA Clock Output.............................. 155 Input Capture Registers ................................................................... 128 Input Change Notification.................................................. 100 Instruction Addressing Modes............................................. 38 File Register Instructions ............................................ 38 Fundamental Modes Supported.................................. 39 MAC Instructions......................................................... 39 MCU Instructions ........................................................ 38 Move and Accumulator Instructions ............................ 39 Other Instructions........................................................ 39 Instruction Set Overview ................................................................... 182 Summary................................................................... 179 Instruction-Based Power-Saving Modes ............................. 97 Idle .............................................................................. 98 Sleep ........................................................................... 97 Internal RC Oscillator Use with WDT ........................................................... 177 Internet Address................................................................ 237 Interrupt Control and Status Registers................................ 63 IECx ............................................................................ 63 IFSx............................................................................. 63 INTCON1 .................................................................... 63 INTCON2 .................................................................... 63 IPCx ............................................................................ 63 Interrupt Setup Procedures ................................................. 85 Initialization ................................................................. 85 Interrupt Disable.......................................................... 85 Interrupt Service Routine ............................................ 85 Trap Service Routine .................................................. 85 Interrupt Vector Table (IVT) ................................................ 59 Interrupts Coincident with Power Save Instructions............ 98 M Memory Organization ......................................................... 23 Microchip Internet Web Site.............................................. 237 Modulo Addressing ............................................................. 40 Applicability................................................................. 41 Operation Example ..................................................... 40 Start and End Address ............................................... 40 W Address Register Selection .................................... 40 MPLAB ASM30 Assembler, Linker, Librarian ................... 188 MPLAB ICD 2 In-Circuit Debugger ................................... 189 MPLAB ICE 2000 High-Performance Universal In-Circuit Emulator .................................................... 189 MPLAB Integrated Development Environment Software.. 187 MPLAB PM3 Device Programmer .................................... 189 MPLAB REAL ICE In-Circuit Emulator System ................ 189 MPLINK Object Linker/MPLIB Object Librarian ................ 188 N NVM Module Register Map .............................................................. 37 O Open-Drain Configuration................................................. 100 Output Compare ............................................................... 129 Registers .................................................................. 133 P Packaging ......................................................................... 225 Details....................................................................... 226 Marking ..................................................................... 225 Peripheral Module Disable (PMD) ...................................... 98 Peripheral Pin Select Input Register Map ..................................................... 33 PICSTART Plus Development Programmer..................... 190 Pinout I/O Descriptions (table).............................................. 9 PMD Module Register Map .............................................................. 37 POR and Long Oscillator Start-up Times ........................... 57 PORTA Register Map .............................................................. 36 PORTB Register Map .............................................................. 36 Power-Saving Features ...................................................... 97 Clock Frequency and Switching ................................. 97 Program Address Space..................................................... 23 Construction ............................................................... 43 Data Access from Program Memory Using Program Space Visibility..................................... 46 Data Access from Program Memory Using Table Instructions ......................................................... 45 Data Access from, Address Generation ..................... 44 Memory Map............................................................... 23 Table Read Instructions TBLRDH ............................................................. 45 TBLRDL.............................................................. 45 Visibility Operation ...................................................... 46 Program Memory Interrupt Vector ........................................................... 24 Organization ............................................................... 24 Reset Vector ............................................................... 24 Pulse-Width Modulation Mode.......................................... 130 PWM Duty Cycle ................................................................ 130 Period ....................................................................... 130 J JTAG Boundary Scan Interface ........................................ 173 DS70264B-page 234 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 R Reader Response ............................................................. 238 Registers AD1CHS0 (ADC1 Input Channel 0 Select ................ 170 AD1CHS123 (ADC1 Input Channel 1, 2, 3 Select) ... 168 AD1CON1 (ADC1 Control 1) .................................... 164 AD1CON2 (ADC1 Control 2) .................................... 166 AD1CON3 (ADC1 Control 3) .................................... 167 AD1CSSL (ADC1 Input Scan Select Low)................ 171 AD1PCFGL (ADC1 Port Configuration Low) ............ 171 CLKDIV (Clock Divisor)............................................... 92 CORCON (Core Control) ...................................... 16, 64 I2CxCON (I2Cx Control) ........................................... 147 I2CxMSK (I2Cx Slave Mode Address Mask) ............ 151 I2CxSTAT (I2Cx Status) ........................................... 149 ICxCON (Input Capture x Control) ............................ 128 IEC0 (Interrupt Enable Control 0) ............................... 72 IEC1 (Interrupt Enable Control 0) ............................... 74 IEC4 (Interrupt Enable Control 0) ............................... 75 IFS0 (Interrupt Flag Status 0) ..................................... 68 IFS1 (Interrupt Flag Status 1) ..................................... 70 IFS4 (Interrupt Flag Status 4) ..................................... 71 INTCON1 (Interrupt Control 1).................................... 65 INTCON2 (Interrupt Control 2).................................... 67 INTTREG Interrupt Control and Status Register......... 84 IPC0 (Interrupt Priority Control 0) ............................... 76 IPC1 (Interrupt Priority Control 1) ............................... 77 IPC16 (Interrupt Priority Control 16) ........................... 83 IPC2 (Interrupt Priority Control 2) ............................... 78 IPC3 (Interrupt Priority Control 3) ............................... 79 IPC4 (Interrupt Priority Control 4) ............................... 80 IPC5 (Interrupt Priority Control 5) ............................... 81 IPC7 (Interrupt Priority Control 7) ............................... 82 NVMCON (Flash Memory Control) ............................. 49 NVMCON (Nonvolatile Memory Key).......................... 50 OCxCON (Output Compare x Control) ..................... 133 OSCCON (Oscillator Control) ..................................... 90 OSCTUN (FRC Oscillator Tuning) .............................. 94 PLLFBD (PLL Feedback Divisor)................................ 93 RCON (Reset Control) ................................................ 54 SPIxCON1 (SPIx Control 1)...................................... 140 SPIxCON2 (SPIx Control 2)...................................... 142 SPIxSTAT (SPIx Status and Control) ....................... 139 SR (CPU Status)................................................... 14, 64 T1CON (Timer1 Control)........................................... 120 T2CON Control ......................................................... 124 T3CON Control ......................................................... 125 UxMODE (UARTx Mode).......................................... 156 UxSTA (UARTx Status and Control)......................... 158 Reset Clock Source Selection............................................... 56 Special Function Register Reset States ..................... 57 Times .......................................................................... 56 Reset Sequence ................................................................. 59 Resets ................................................................................. 53 S Serial Peripheral Interface (SPI) ....................................... 135 Setup for Continuous Output Pulse Generation ............... 129 Setup for Single Output Pulse Generation........................ 129 Software Simulator (MPLAB SIM) .................................... 188 Software Stack Pointer, Frame Pointer CALL Stack Frame ..................................................... 38 Special Features of the CPU ............................................ 173 SPI Master, Frame Master Connection ........................... 137 Master/Slave Connection ......................................... 137 Slave, Frame Master Connection ............................. 138 Slave, Frame Slave Connection ............................... 138 SPI Module SPI1 Register Map ..................................................... 32 Symbols Used in Opcode Descriptions ............................ 180 System Control Register Map .............................................................. 36 T Temperature and Voltage Specifications AC............................................................................. 200 Timer1 .............................................................................. 119 Timer2/3 ........................................................................... 121 Timing Characteristics CLKO and I/O ........................................................... 203 Timing Diagrams 10-bit A/D Conversion .............................................. 223 10-bit A/D Conversion (CHPS = 01, SIMSAM = 0, ASAM = 0, SSRC = 000) .................................. 223 12-bit A/D Conversion (ASAM = 0, SSRC = 000)..... 222 External Clock .......................................................... 201 I2Cx Bus Data (Master Mode) .................................. 215 I2Cx Bus Data (Slave Mode) .................................... 217 I2Cx Bus Start/Stop Bits (Master Mode)................... 215 I2Cx Bus Start/Stop Bits (Slave Mode)..................... 217 Input Capture (CAPx) ............................................... 208 OC/PWM .................................................................. 209 Output Compare (OCx) ............................................ 208 Reset, Watchdog Timer, Oscillator Start-up Timer and Power-up Timer............................... 204 SPIx Master Mode (CKE = 0) ................................... 210 SPIx Master Mode (CKE = 1) ................................... 211 SPIx Slave Mode (CKE = 0) ..................................... 212 SPIx Slave Mode (CKE = 1) ..................................... 213 Timer1, 2 and 3 External Clock ................................ 206 Timing Requirements CLKO and I/O ........................................................... 203 DCI AC-Link Mode.................................................... 219 DCI Multi-Channel, I2S Modes ................................. 219 External Clock .......................................................... 201 Input Capture............................................................ 208 Timing Specifications 10-bit A/D Conversion Requirements ....................... 224 12-bit A/D Conversion Requirements ....................... 222 I2Cx Bus Data Requirements (Master Mode)........... 216 I2Cx Bus Data Requirements (Slave Mode)............. 218 Output Compare Requirements................................ 208 PLL Clock ................................................................. 202 Reset, Watchdog Timer, Oscillator Start-up Timer, Power-up Timer and Brown-out Reset Requirements ................................................... 205 Simple OC/PWM Mode Requirements ..................... 209 SPIx Master Mode (CKE = 0) Requirements............ 210 SPIx Master Mode (CKE = 1) Requirements............ 211 (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 235 dsPIC33FJ12GP201/202 SPIx Slave Mode (CKE = 0) Requirements .............. 212 SPIx Slave Mode (CKE = 1) Requirements .............. 214 Timer1 External Clock Requirements ....................... 206 Timer2 External Clock Requirements ....................... 207 Timer3 External Clock Requirements ....................... 207 U UART Baud Rate Generator (BRG)............................................... 154 Break and Sync Transmit Sequence ........................ 155 Flow Control Using UxCTS and UxRTS Pins............ 155 Receiving in 8-bit or 9-bit Data Mode........................ 155 Transmitting in 8-bit Data Mode ................................ 155 Transmitting in 9-bit Data Mode ................................ 155 UART Module UART1 Register Map .................................................. 32 V Voltage Regulator (On-Chip)............................................. 176 W Watchdog Timer (WDT) ............................................ 173, 177 Programming Considerations ................................... 177 WWW Address.................................................................. 237 WWW, On-Line Support........................................................ 6 DS70264B-page 236 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 THE MICROCHIP WEB SITE Microchip provides online support via our WWW site at www.microchip.com. This web site is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser, the web site contains the following information: * Product Support - Data sheets and errata, application notes and sample programs, design resources, user's guides and hardware support documents, latest software releases and archived software * General Technical Support - Frequently Asked Questions (FAQ), technical support requests, online discussion groups, Microchip consultant program member listing * Business of Microchip - Product selector and ordering guides, latest Microchip press releases, listing of seminars and events, listings of Microchip sales offices, distributors and factory representatives CUSTOMER SUPPORT Users of Microchip products can receive assistance through several channels: * * * * Distributor or Representative Local Sales Office Field Application Engineer (FAE) Technical Support Customers should contact their distributor, representative or field application engineer (FAE) for support. Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of this document. Technical support is available through the web site at: http://support.microchip.com CUSTOMER CHANGE NOTIFICATION SERVICE Microchip's customer notification service helps keep customers current on Microchip products. Subscribers will receive e-mail notification whenever there are changes, updates, revisions or errata related to a specified product family or development tool of interest. To register, access the Microchip web site at www.microchip.com, click on Customer Change Notification and follow the registration instructions. (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 237 dsPIC33FJ12GP201/202 READER RESPONSE It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip product. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation can better serve you, please FAX your comments to the Technical Publications Manager at (480) 792-4150. Please list the following information, and use this outline to provide us with your comments about this document. To: RE: Technical Publications Manager Reader Response Total Pages Sent ________ From: Name Company Address City / State / ZIP / Country Telephone: (_______) _________ - _________ Application (optional): Would you like a reply? Y N Literature Number: DS70264B FAX: (______) _________ - _________ Device: dsPIC33FJ12GP201/202 Questions: 1. What are the best features of this document? 2. How does this document meet your hardware and software development needs? 3. Do you find the organization of this document easy to follow? If not, why? 4. What additions to the document do you think would enhance the structure and subject? 5. What deletions from the document could be made without affecting the overall usefulness? 6. Is there any incorrect or misleading information (what and where)? 7. How would you improve this document? DS70264B-page 238 Preliminary (c) 2007 Microchip Technology Inc. dsPIC33FJ12GP201/202 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. dsPIC 33 FJ 12 GP2 02 T E / SP - XXX Microchip Trademark Architecture Flash Memory Family Program Memory Size (KB) Product Group Pin Count Tape and Reel Flag (if applicable) Temperature Range Package Pattern Examples: a) dsPIC33FJ12GP202-E/SP: General purpose dsPIC33, 12 KB program memory, 28-pin, Extended temp., SPDIP package. Architecture: Flash Memory Family: Product Group: Pin Count: 33 FJ GP2 01 02 I E P SP SO ML = = = = = = = = = = = 16-bit Digital Signal Controller Flash program memory, 3.3V General purpose family 18-pin 28-pin -40C to +85C (Industrial) -40C to +125C (Extended) Plastic Dual In-Line - 300 mil body (PDIP) Skinny Plastic Dual In-Line - 300 mil body (SPDIP) Plastic Small Outline - Wide, 300 mil body (SOIC) Plastic Quad, No Lead Package - 6x6 mm body (QFN) Temperature Range: Package: (c) 2007 Microchip Technology Inc. Preliminary DS70264B-page 239 WORLDWIDE SALES AND SERVICE AMERICAS Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://support.microchip.com Web Address: www.microchip.com Atlanta Duluth, GA Tel: 678-957-9614 Fax: 678-957-1455 Boston Westborough, MA Tel: 774-760-0087 Fax: 774-760-0088 Chicago Itasca, IL Tel: 630-285-0071 Fax: 630-285-0075 Dallas Addison, TX Tel: 972-818-7423 Fax: 972-818-2924 Detroit Farmington Hills, MI Tel: 248-538-2250 Fax: 248-538-2260 Kokomo Kokomo, IN Tel: 765-864-8360 Fax: 765-864-8387 Los Angeles Mission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608 Santa Clara Santa Clara, CA Tel: 408-961-6444 Fax: 408-961-6445 Toronto Mississauga, Ontario, Canada Tel: 905-673-0699 Fax: 905-673-6509 ASIA/PACIFIC Asia Pacific Office Suites 3707-14, 37th Floor Tower 6, The Gateway Habour City, Kowloon Hong Kong Tel: 852-2401-1200 Fax: 852-2401-3431 Australia - Sydney Tel: 61-2-9868-6733 Fax: 61-2-9868-6755 China - Beijing Tel: 86-10-8528-2100 Fax: 86-10-8528-2104 China - Chengdu Tel: 86-28-8665-5511 Fax: 86-28-8665-7889 China - Fuzhou Tel: 86-591-8750-3506 Fax: 86-591-8750-3521 China - Hong Kong SAR Tel: 852-2401-1200 Fax: 852-2401-3431 China - Qingdao Tel: 86-532-8502-7355 Fax: 86-532-8502-7205 China - Shanghai Tel: 86-21-5407-5533 Fax: 86-21-5407-5066 China - Shenyang Tel: 86-24-2334-2829 Fax: 86-24-2334-2393 China - Shenzhen Tel: 86-755-8203-2660 Fax: 86-755-8203-1760 China - Shunde Tel: 86-757-2839-5507 Fax: 86-757-2839-5571 China - Wuhan Tel: 86-27-5980-5300 Fax: 86-27-5980-5118 China - Xian Tel: 86-29-8833-7250 Fax: 86-29-8833-7256 ASIA/PACIFIC India - Bangalore Tel: 91-80-4182-8400 Fax: 91-80-4182-8422 India - New Delhi Tel: 91-11-4160-8631 Fax: 91-11-4160-8632 India - Pune Tel: 91-20-2566-1512 Fax: 91-20-2566-1513 Japan - Yokohama Tel: 81-45-471- 6166 Fax: 81-45-471-6122 Korea - Gumi Tel: 82-54-473-4301 Fax: 82-54-473-4302 Korea - Seoul Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934 Malaysia - Penang Tel: 60-4-646-8870 Fax: 60-4-646-5086 Philippines - Manila Tel: 63-2-634-9065 Fax: 63-2-634-9069 Singapore Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan - Hsin Chu Tel: 886-3-572-9526 Fax: 886-3-572-6459 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 EUROPE Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79 Germany - Munich Tel: 49-89-627-144-0 Fax: 49-89-627-144-44 Italy - Milan Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands - Drunen Tel: 31-416-690399 Fax: 31-416-690340 Spain - Madrid Tel: 34-91-708-08-90 Fax: 34-91-708-08-91 UK - Wokingham Tel: 44-118-921-5869 Fax: 44-118-921-5820 12/08/06 DS70264B-page 240 Preliminary (c) 2007 Microchip Technology Inc. |
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