Microchip Technology PIC16F631, PIC16F677, PIC16F685, PIC16F687, PIC16F689 Data Sheet

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PIC16F631/677/685/687/689/690

Data Sheet

20-Pin Flash-Based, 8-Bit

CMOS Microcontrollers with

nanoWatt Technology

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in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates.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, K

EELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,

PICSTART, PRO MATE, rfPIC and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

FilterLab, Linear Active Thermistor, MXDEV, MXLAB, 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, dsSPEAK, ECAN, ECONOMONITOR, FanSense, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, mTouch, PICkit, PICDEM, PICDEM.net, PICtail, PIC

logo, PowerCal, PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, 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.

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 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.

MCUs and dsPIC® DSCs, KEELOQ

code hopping

PIC16F631/677/685/687/689/690

20-Pin Flash-Based, 8-Bit CMOS Microcontrollers with

nanoWatt Technology

High-Performance RISC CPU:

• Only 35 Instructions to Learn:

- All single-cycle instructions except branches

• Operating Speed:

- DC – 20 MHz oscillator/clock input

- DC – 200 ns instruction cycle

• Interrupt Capability

• 8-Level Deep Hardware Stack

• Direct, Indirect and Relative Addressing modes

Special Microcontroller Features:

• Precision Internal Oscillator:

- Factory calibrated to ± 1%

- Software selectable frequency range of 8 MHz to 32 kHz

- Software tunable

- Two-Speed Start-up mode

- Crystal fail detect for critical applications

- Clock mode switching during operation for power savings

• Power-Saving Sleep mode

• Wide Operating Voltage Range (2.0V-5.5V)

• Industrial and Extended Temperature Range

• Power-on Reset (POR)

• Power-up Timer (PWRTE) and Oscillator Start-up Timer (OST)

• Brown-out Reset (BOR) with Software Control Option

• Enhanced Low-Current Watchdog Timer (WDT) with On-Chip Oscillator (Software selectable nominal 268 Seconds with Full Prescaler) with Software Enable

• Multiplexed Master Clear/Input Pin

• Programmable Code Protection

• High Endurance Flash/EEPROM Cell:

- 100,000 write Flash endurance

- 1,000,000 write EEPROM endurance

- Flash/Data EEPROM retention: > 40 years

• Enhanced USART Module:

- Supports RS-485, RS-232 and LIN 2.0

- Auto-Baud Detect

- Auto-wake-up on Start bit

Low-Power Features:

• Standby Current:

- 50 nA @ 2.0V, typical

• Operating Current:

-11μA @ 32 kHz, 2.0V, typical

-220μA @ 4 MHz, 2.0V, typical

• Watchdog Timer Current:

-<1μA @ 2.0V, typical

Peripheral Features:

• 17 I/O Pins and 1 Input-Only Pin:

- High current source/sink for direct LED drive

- Interrupt-on-Change pin

- Individually programmable weak pull-ups

- Ultra Low-Power Wake-up (ULPWU)

• Analog Comparator Module with:

- Two analog comparators

- Programmable on-chip voltage reference

REF) module (% of VDD)

(CV

- Comparator inputs and outputs externally accessible

- SR Latch mode

- Timer 1 Gate Sync Latch

- Fixed 0.6V V

• A/D Converter:

- 10-bit resolution and 12 channels

• Timer0: 8-bit Timer/Counter with 8-bit Programmable Prescaler

• Enhanced Timer1:

- 16-bit timer/counter with prescaler

- External Timer1 Gate (count enable)

- Option to use OSC1 and OSC2 in LP mode

as Timer1 oscillator if INTOSC mode selected

• Timer2: 8-bit Timer/Counter with 8-bit Period Register, Prescaler and Postscaler

• Enhanced Capture, Compare, PWM+ Module:

- 16-bit Capture, max resolution 12.5 ns

- Compare, max resolution 200 ns

- 10-bit PWM with 1, 2 or 4 output channels,

programmable “dead time”, max frequency 20 kHz

- PWM output steering control

• Synchronous Serial Port (SSP):

- SPI mode (Master and Slave)

C™ (Master/Slave modes):

•I

C™ address mask

-I

• In-Circuit Serial Programming Pins

REF

(ICSPTM) via Two

PIC16F631/677/685/687/689/690

Program

Memory

Device

Flash

(words)

Data Memory

SRAM

EEPROM

(bytes)

I/O

10-bit A/D

(ch)

Comparators

Timers

8/16-bit

SSP ECCP+ EUSART

PIC16F631 1024 64 128 18 — 2 1/1 No No No PIC16F677 2048 128 256 18 12 2 1/1 Yes No No PIC16F685 4096 256 256 18 12 2 2/1 No Yes No PIC16F687 2048 128 256 18 12 2 1/1 Yes No Yes PIC16F689 4096 256 256 18 12 2 1/1 Yes No Yes PIC16F690 4096 256 256 18 12 2 2/1 Yes Yes Yes

PIC16F631 Pin Diagram

20-pin PDIP, SOIC, SSOP

VDD

RA5/T1CKI/OSC1/CLKIN

RA4/T1G

/OSC2/CLKOUT

RA3/MCLR

RC3/C12IN3-

/VPP RC5

RC4/C2OUT

RC6 RC7 RB7

1 2 3 4 5 6 7 8 9 10

PIC16F631

20 19 18 17

16 15 14 13 12 11

VSS RA0/C1IN+/ICSPDAT/ULPWU RA1/C12IN0-/ICSPCLK RA2/T0CKI/INT/C1OUT RC0/C2IN+ RC1/C12IN1RC2/C12IN2RB4 RB5 RB6

TABLE 1: PIC16F631 PIN SUMMARY

I/O Pin Analog Comparators Timers Interrupt Pull-up Basic

RA0 19 AN0/ULPWU C1IN+ — IOC Y ICSPDAT

RA1 18 AN1 C12IN0- — IOC Y ICSPCLK

RA2 17 — C1OUT T0CKI IOC/INT Y —

RA3 4 — — — IOC Y

RA4 3 — — T1G IOC Y OSC2/CLKOUT

RA5 2 — — T1CKI IOC Y OSC1/CLKIN

RB4 13 — — — IOC Y —

RB5 12 — — — IOC Y —

RB6 11 — — — IOC Y —

RB7 10 — — — IOC Y —

RC0 16 AN4 C2IN+ — — — —

RC1 15 AN5 C12IN1- — — — —

RC2 14 AN6 C12IN2- — — — —

RC3 7 AN7 C12IN3- — — — —

RC4 6 — C2OUT — — — —

RC55— ———— —

RC6 8 — — — — — —

RC79— ———— —

— 1 — — — — — VDD

—20— ———— VSS

Note 1: Pull-up enabled only with external MCLR configuration.

(1)

MCLR/VPP

PIC16F677 Pin Diagram

20-pin PDIP, SOIC, SSOP

PIC16F631/677/685/687/689/690

RA5/T1CKI/OSC1/CLKIN

RA4/AN3/T1G

/OSC2/CLKOUT

RA3/MCLR

RC3/AN7C12IN3-

RC7/AN9/SDO

VDD

/VPP RC5

RC4/C2OUT

RC6/AN8/SS

RB7

1 2 3 4 5 6 7 8 9 10

PIC16F677

20 19 18 17

16 15 14 13 12 11

VSS RA0/AN0/C1IN+/ICSPDAT/ULPWU RA1/AN1/C12IN0-/V RA2/AN2/T0CKI/INT/C1OUT RC0/AN4/C2IN+ RC1/AN5/C12IN1RC2/AN6/C12IN2RB4/AN10/SDI/SDA RB5/AN11 RB6/SCK/SCL

REF/ICSPCLK

TABLE 2: PIC16F677 PIN SUMMARY

I/O Pin Analog Comparators Timers SSP Interrupt Pull-up Basic

RA0 19 AN0/ULPWU C1IN+ — — IOC Y ICSPDAT

RA1 18 AN1/VREF C12IN0- — — IOC Y ICSPCLK

RA2 17 AN2 C1OUT T0CKI — IOC/INT Y —

RA3 4 — — — — IOC Y

RA4 3 AN3 —

T1G

— IOC Y OSC2/CLKOUT

RA5 2 — — T1CKI — IOC Y OSC1/CLKIN

RB4 13 AN10 — — SDI/SDA IOC Y —

RB5 12 AN11 — — — IOC Y —

RB6 11 — — — SCL/SCK IOC Y —

RB7 10 — — — — IOC Y —

RC0 16 AN4 C2IN+ — — — — —

RC1 15 AN5 C12IN1- — — — — —

RC2 14 AN6 C12IN2- — — — — —

RC3 7 AN7 C12IN3- — — — — —

RC4 6 — C2OUT — — — — —

RC5 5 — — — — — — —

RC6 8 AN8 — — SS — — —

RC7 9 AN9 — — SDO — — —

— 1 — — — — — — VDD

—20 — — — — — — VSS

Note 1: Pull-up activated only with external MCLR configuration.

(1)

MCLR/VPP

PIC16F631/677/685/687/689/690

PIC16F685 Pin Diagram

20-pin PDIP, SOIC, SSOP

RA5/T1CKI/OSC1/CLKIN

RA4/AN3/T1G

/OSC2/CLKOUT

RA3/MCLR RC5/CCP1/P1A

RC4/C2OUT/P1B

RC3/AN7/C12IN3-/P1C

VDD

/VPP

RC6/AN8 RC7/AN9

RB7

1 2 3 4 5 6 7 8 9 10

PIC16F685

19 18 17

16 15 14 13 12 11

VSS RA0/AN0/C1IN+/ICSPDAT/ULPWU RA1/AN1/C12IN0-/V RA2/AN2/T0CKI/INT/C1OUT RC0/AN4/C2IN+ RC1/AN5/C12IN1RC2/AN6/C12IN2-/P1D RB4/AN10 RB5/AN11 RB6

REF/ICSPCLK

TABLE 3: PIC16F685 PIN SUMMARY

I/O Pin Analog Comparators Timers ECCP Interrupt Pull-up Basic

RA0 19 AN0/ULPWU C1IN+ — — IOC Y ICSPDAT

RA1 18 AN1/VREF C12IN0- — — IOC Y ICSPCLK

RA2 17 AN2 C1OUT T0CKI — IOC/INT Y —

RA3 4 — — — — IOC Y

RA4 3 AN3 —

T1G

— IOC Y OSC2/CLKOUT

RA5 2 — — T1CKI — IOC Y OSC1/CLKIN

RB4 13 AN10 — — — IOC Y —

RB5 12 AN11 — — — IOC Y —

RB6 11 — — — — IOC Y —

RB7 10 — — — — IOC Y —

RC0 16 AN4 C2IN+ — — — — —

RC1 15 AN5 C12IN1- — — — — —

RC2 14 AN6 C12IN2- — P1D — — —

RC3 7 AN7 C12IN3- — P1C — — —

RC4 6 — C2OUT — P1B — — —

RC5 5 — — — CCP1/P1A — — —

RC6 8 AN8 — — — — — —

RC7 9 AN9 — — — — — —

— 1 — — — — — — VDD

—20 — — — — — — VSS

Note 1: Pull-up activated only with external MCLR configuration.

(1)

MCLR/VPP

PIC16F687/689 Pin Diagram

20-pin PDIP, SOIC, SSOP

PIC16F631/677/685/687/689/690

RA5/T1CKI/OSC1/CLKIN

RA4/AN3/T1G

/OSC2/CLKOUT

RA3/MCLR

RC3/AN7/C12IN3-

RC7/AN9/SDO

VDD

/VPP RC5

RC4/C2OUT

RC6/AN8/SS

RB7/TX/CK

1 2 3 4 5 6 7 8 9 10

PIC16F687/689

20 19 18 17

16 15 14 13 12 11

VSS RA0/AN0/C1IN+/ICSPDAT/ULPWU RA1/AN1/C12IN0-/V RA2/AN2/T0CKI/INT/C1OUT RC0/AN4/C2IN+ RC1/AN5/C12IN1RC2/AN6/C12IN2RB4/AN10/SDI/SDA RB5/AN11/RX/DT RB6/SCK/SCL

REF/ICSPCLK

TABLE 4: PIC16F687/689 PIN SUMMARY

I/O Pin Analog Comparators Timers EUSART SSP Interrupt Pull-up Basic

RA0 19 AN0/ULPWU C1IN+ — — — IOC Y ICSPDAT

RA1 18 AN1/VREF C12IN0- — — — IOC Y ICSPCLK

RA2 17 AN2 C1OUT T0CKI — — IOC/INT Y

RA3 4 — — — — — IOC Y

RA4 3 AN3 —

T1G

— — IOC Y OSC2/CLKOUT

RA5 2 — — T1CKI — — IOC Y OSC1/CLKIN

RB4 13 AN10 — — — SDI/SDA IOC Y —

RB5 12 AN11 — — RX/DT — IOC Y —

RB6 11 — — — — SCL/SCK IOC Y —

RB7 10 — — — TX/CK — IOC Y —

RC0 16 AN4 C2IN+ — — — — — —

RC1 15 AN5 C12IN1- — — — — — —

RC2 14 AN6 C12IN2- — — — — — —

RC3 7 AN7 C12IN3- — — — — — —

RC4 6 — C2OUT — — — — — —

RC5 5 — — — — — — — —

RC6 8 AN8 — — —

— — —

RC7 9 AN9 — — — SDO — — —

— 1 — — — — — — — VDD

—20 — — — — — — — VSS

Note 1: Pull-up activated only with external MCLR configuration.

(1)

MCLR/VPP

PIC16F631/677/685/687/689/690

PIC16F690 Pin Diagram (PDIP, SOIC, SSOP)

20-pin PDIP, SOIC, SSOP

RA5/T1CKI/OSC1/CLKIN

RA4/AN3/T1G

/OSC2/CLKOUT

RA3/MCLR RC5/CCP1/P1A

RC4/C2OUT/P1B

RC3/AN7/C12IN3-/P1C

RC7/AN9/SDO

VDD

/VPP

RC6/AN8/SS

RB7/TX/CK

1 2 3 4 5 6 7 8 9 10

PIC16F690

20 19 18 17

16 15 14 13 12 11

VSS RA0/AN0/C1IN+/ICSPDAT/ULPWU RA1/AN1/C12IN0-/V RA2/AN2/T0CKI/INT/C1OUT RC0/AN4/C2IN+ RC1/AN5/C12IN1RC2/AN6/C12IN2-/P1D RB4/AN10/SDI/SDA RB5/AN11/RX/DT RB6/SCK/SCL

REF/ICSPCLK

TABLE 5: PIC16F690 PIN SUMMARY

I/O Pin Analog Comparators Timers ECCP EUSART SSP Interrupt Pull-up Basic

RA0 19 AN0/ULPWU C1IN+ — — — — IOC Y ICSPDAT

RA1 18 AN1/V

RA2 17 AN2 C1OUT T0CKI — — — IOC/INT Y

RA3 4 — — — — — — IOC Y

RA4 3 AN3 —

RA5 2 — — T1CKI — — — IOC Y OSC1/CLKIN

RB4 13 AN10 — — — — SDI/SDA IOC Y —

RB5 12 AN11 — — — RX/DT — IOC Y —

RB6 11 — — — — SCL/SCK IOC Y —

RB7 10 — — — — TX/CK — IOC Y —

RC0 16 AN4 C2IN+ — — — — — — —

RC1 15 AN5 C12IN1- — — — — — — —

RC2 14 AN6 C12IN2- — P1D — — — — —

RC3 7 AN7 C12IN3- — P1C — — — — —

RC4 6 — C2OUT — P1B — — — — —

RC5 5 — — — CCP1/P1A — — — — —

RC6 8 AN8 — — — —

RC7 9 AN9 — — — — SDO — — —

— 1 — — — — — — — — VDD

—20 — — — — — — — — VSS

Note 1: Pull-up activated only with external MCLR configuration.

REF C12IN0- — — — — IOC Y ICSPCLK

T1G

(1)

— — — IOC Y OSC2/CLKOUT

— — —

MCLR/VPP

PIC16F631/677/685/687/689/690

PIC16F631/677/685/687/689/690 Pin Diagram (QFN)

20-pin QFN

RA5/T1CKI/OSC1/CLKIN

VSS

RA3/MCLR/VPP

RC5/CCP1/P1A

RC4/C2OUT/P1B

RC3/AN7/C12IN3-/P1C

RC6/AN8/SS

RA4/AN3/T1G/OSC2/CLKOUT

(1)

(2)

PIC16F631/677/

685/687/689/690

RA0/AN0/C1IN+/ICSPDAT/ULPWU

RA1/AN1/C12IN0-/VREF/ICSPCLK

RA2/AN2/T0CKI/INT/C1OUT

RC0/AN4/C2IN+

RC1/AN5/C12IN1-

RC2/AN6/C12IN2-/P1D

(1)

(2)

(3)

(2)

(3)

(2)

RB7/TX/CK

RC7/AN9/SDO

Note 1: CCP1/P1A, P1B, P1C and P1D are available on PIC16F685/PIC16F690 only.

, SDO, SDI/SDA and SCL/SCK are available on PIC16F677/PIC16F687/PIC16F689/PIC16F690 only.

2: SS

3: RX/DT and TX/CK are available on PIC16F687/PIC16F689/PIC16F690 only.

RB6/SCK/SCL

RB5/AN11/RX/DT

RB4/AN10/SDI/SDA

PIC16F631/677/685/687/689/690

Table of Contents

1.0 Device Overview .......................................................................................................................................................................... 9

2.0 Memory Organization ................................................................................................................................................................. 25

3.0 Oscillator Module (With Fail-Safe Clock Monitor)....................................................................................................................... 47

4.0 I/O Ports ..................................................................................................................................................................................... 59

5.0 Timer0 Module ........................................................................................................................................................................... 81

6.0 Timer1 Module with Gate Control............................................................................................................................................... 84

7.0 Timer2 Module ........................................................................................................................................................................... 91

8.0 Comparator Module.................................................................................................................................................................... 93

9.0 Analog-to-Digital Converter (ADC) Module .............................................................................................................................. 107

10.0 Data EEPROM and Flash Program Memory Control ............................................................................................................... 119

11.0 Enhanced Capture/Compare/PWM Module ............................................................................................................................. 127

12.0 Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART) ............................................................... 151

13.0 SSP Module Overview ............................................................................................................................................................. 179

14.0 Special Features of the CPU.................................................................................................................................................... 197

15.0 Instruction Set Summary.......................................................................................................................................................... 217

16.0 Development Support............................................................................................................................................................... 227

17.0 Electrical Specifications............................................................................................................................................................ 231

18.0 DC and AC Characteristics Graphs and Tables ....................................................................................................................... 259

19.0 Packaging Information.............................................................................................................................................................. 287

Appendix A: Data Sheet Revision History .......................................................................................................................................... 293

Appendix B: Migrating from other PIC

Devices................................................................................................................................ 293

TO OUR VALUED CUSTOMERS

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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

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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:

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• 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

PIC16F631/677/685/687/689/690

1.0 DEVICE OVERVIEW

The PIC16F631/677/685/687/689/690 devices are covered by this data sheet. They are available in 20-pin PDIP, SOIC, TSSOP and QFN packages.

FIGURE 1-1: PIC16F631 BLOCK DIAGRAM

INT

Program

Bus

Configuration

Flash

1K x 14

Program

Memory

Instruction Reg

Program Counter

8-Level Stack (13-bit)

Direct Addr

Block Diagrams and pinout descriptions of the devices are as follows:

• PIC16F631 (Figure 1-1, Table 1-1)

• PIC16F677 (Figure 1-2, Table 1-2)

• PIC16F685 (Figure 1-3, Table 1-3)

• PIC16F687/PIC16F689 (Figure 1-4, Table 1-4)

• PIC16F690 (Figure 1-5, Table 1-5)

Data Bus

RAM

64 bytes

File

Registers

Addr MUX

FSR Reg

RAM Addr

Indirect

Addr

PORTA

RA0 RA1 RA2 RA3 RA4 RA5

PORTB

RB4 RB5 RB6

RB7

OSC1/CLKI

OSC2/CLKO

Internal

Oscillator

Block

Ultra Low-Power

Instruction

Decode and

Generation

ULPWU

Wake-up

Control

Timing

Power-up

Timer

Oscillator

Start-up Timer

Power-on

Reset

Watchdog

Timer

Brown-out

Reset

VDD

MCLR

Timer0 Timer1

VSS

T1G T1CKIT0CKI

STATUS Reg

PORTC

ALU

W Reg

MUX

EEDAT

128 Bytes

Data

EEPROM

EEADR

C1IN- C1IN+ C1OUT

Analog Comparators

and Reference

RC0 RC1 RC2 RC3 RC4 RC5 RC6 RC7

C2IN- C2IN+ C2OUT

PIC16F631/677/685/687/689/690

FIGURE 1-2: PIC16F677 BLOCK DIAGRAM

INT

Program

OSC1/CLKI

OSC2/CLKO

Internal

Oscillator

Block

Configuration

Program

Bus

Instruction Reg

Instruction

Decode and

Generation

ULPWU

Flash

2K x 14

Memory

Control

Timing

Program Counter

8-Level Stack (13-bit)

Direct Addr

Power-up

Timer

Oscillator

Start-up Timer

Power-on

Reset

Watchdog

Timer

Brown-out

Reset

VDD

MCLR

VSS

RAM Addr

Indirect

Addr

Data Bus

RAM

128 bytes

File

Registers

Addr MUX

T1G T1CKIT0CKI

FSR Reg

STATUS Reg

MUX

ALU

W Reg

PORTA

PORTB

PORTC

SDO

RA0 RA1

RA2 RA3 RA4 RA5

SDI/ SCK/

SDA SCL

RB4 RB5 RB6 RB7

RC0 RC1 RC2 RC3 RC4 RC5 RC6 RC7

Ultra Low-Power

Wake-up

AN8 AN9 AN10 AN11

Analog-to-Digital Converter

VREF

AN0 AN1 AN2 AN3 AN4 AN5 AN6

Timer0 Ti mer1

Analog Comparators

AN7

C1IN- C1IN+ C1OUT

and Reference

C2IN- C2IN+ C2OUT

Synchronous

Serial Port

EEDAT

256 Bytes

Data

EEPROM

EEADR

PIC16F631/677/685/687/689/690

FIGURE 1-3: PIC16F685 BLOCK DIAGRAM

INT

Program

Bus

Configuration

Flash

4K x 14

Program

Memory

Instruction Reg

Program Counter

8-Level Stack (13-bit)

Direct Addr

Data Bus

RAM

256 bytes

File

Registers

RAM Addr

Addr MUX

Indirect

FSR Reg

Addr

PORTA

RA0 RA1 RA2 RA3 RA4 RA5

PORTB

RB4 RB5 RB6

RB7

Instruction

Decode and

Control

OSC1/CLKI

OSC2/CLKO

Internal

Oscillator

Block

Ultra Low-Power

AN8 AN9 AN10 AN11

Generation

ULPWU

Wake-up

Timi ng

Analog-to-Digital Converter

Power-up

Timer

Oscillator

Start-up Timer

Power-on

Reset

Watchdog

Timer

Brown-out

Reset

VDD

MCLR

Timer0 Timer1

VSS

T1G

STATUS Reg

ALU

W Reg

T1CKIT0CKI

Analog Comparators

and Reference

MUX

Timer2

PORTC

CCP1/

EEDAT

256 Bytes

Data

EEPROM

EEADR

RC0 RC1

RC2 RC3 RC4 RC5 RC6 RC7

P1B P1C P1DP1A

ECCP+

VREF

AN0 AN1 AN2 AN3 AN4 AN5 AN6

AN7

C1IN- C1IN+ C1OUT

C2IN- C2IN+ C2OUT

PIC16F631/677/685/687/689/690

FIGURE 1-4: PIC16F687/PIC16F689 BLOCK DIAGRAM

INT

Program

Bus

OSC1/CLKI

OSC2/CLKO

Internal

Oscillator

Block

Configuration

Flash

(1)

/4K x 14

Program

Memory

Instruction Reg

Instruction

Decode and

Control

Timing

Generation

ULPWU

Program Counter

8-Level Stack (13-bit)

Direct Addr

Power-up

Timer

Oscillator

Start-up Timer

Power-on

Reset

Watchdog

Timer

Brown-out

Reset

VDD

MCLR

VSS

RAM Addr

Indirect

Addr

RX/DT

Data Bus

RAM

(1)

/256 bytes

128

File

Registers

Addr MUX

T1G T1CKIT0CKI

FSR Reg

STATUS Reg

MUX

ALU

W Reg

TX/CK

PORTA

PORTB

PORTC

RA0 RA1

RA2 RA3 RA4 RA5

SDO

RB4 RB5 RB6

RB7

RC0 RC1 RC2 RC3 RC4 RC5 RC6 RC7

SDI/ SCK/

SDA SCL

Ultra Low-Power

Wake-up

AN8 AN9 AN10 AN11

Analog-to-Digital Converter

VREF

AN0 AN1 AN2 AN3 AN4 AN5 AN6

Note 1: PIC16F687 only.

Timer0 Ti mer1

Analog Comparators

AN7

C1IN- C1IN+ C1OUT

and Reference

C2IN- C2IN+ C2OUT

EUSART

EEDAT

256 Bytes

Data

EEPROM

EEADR

Synchronous

Serial Port

PIC16F631/677/685/687/689/690

FIGURE 1-5: PIC16F690 BLOCK DIAGRAM

INT

Program

OSC1/CLKI

OSC2/CLKO

Internal

Oscillator

Block

ULPWU

Configuration

Bus

Instruction Reg

Instruction

Decode and

Generation

Flash

4k x 14

Program

Memory

Control

Timi ng

T0CKI

Program Counter

8-Level Stack (13-bit)

Direct Addr

Power-up

Timer

Oscillator

Start-up Timer

Power-on

Reset

Watchdog

Timer

Brown-out

Reset

VDD

MCLR

T1G T1CKI

VSS

Data Bus

RAM

256 bytes

File

Registers

Addr MUX

FSR Reg

STATUS Reg

MUX

ALU

W Reg

TX/CK RX/DT

RAM Addr

Indirect

Addr

PORTA

RA0 RA1 RA2 RA3 RA4 RA5

PORTB

RB4 RB5 RB6 RB7

PORTC

CCP1/

P1A

P1B P1C P1D

RC0 RC1 RC2 RC3 RC4 RC5 RC6 RC7

SDO

SDI/ SCK/ SDA SCL

Ultra Low-Power

Wake-up

AN8 AN9 AN10 AN11

Timer0

Analog-to-Digital Converter

VREF

AN0 AN1 AN2 AN3 AN4 AN5 AN6

Timer1

AN7

C1IN- C1IN+ C1OUT

Timer2

Analog Comparators

and Reference

C2IN- C2IN+ C2OUT

EUSART

ECCP+

EEDAT

256 Bytes

Data

EEPROM

EEADR

Synchronous

Serial Port

PIC16F631/677/685/687/689/690

TABLE 1-1: PINOUT DESCRIPTION – PIC16F631

Input

Name Function

RA0/C1IN+/ICSPDAT/ULPWU RA0 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

C1IN+ AN — Comparator C1 non-inverting input.

ICSPDAT ST CMOS ICSP™ Data I/O.

ULPWU AN — Ultra Low-Power Wake-up input.

RA1/C12IN0-/ICSPCLK RA1 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

C12IN0- AN — Comparator C1 or C2 inverting input.

ICSPCLK ST — ICSP™ clock.

RA2/T0CKI/INT/C1OUT RA2 ST CMOS General purpose I/O. Individually controlled interrupt-on-change.

T0CKI ST — Timer0 clock input.

INT ST — External interrupt pin.

C1OUT — CMOS Comparator C1 output.

RA3/MCLR

RA4/T1G

RA5/T1CKI/OSC1/CLKIN RA5 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

RB4 RB4 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

RB5 RB5 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

RB6 RB6 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

RB7 RB7 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

RC0/C2IN+ RC0 ST CMOS General purpose I/O.

RC1/C12IN1- RC1 ST CMOS General purpose I/O.

RC2/C12IN2- RC2 ST CMOS General purpose I/O.

RC3/C12IN3- RC3 ST CMOS General purpose I/O.

RC4/C2OUT RC4 ST CMOS General purpose I/O.

RC5 RC5 ST CMOS General purpose I/O.

Legend: AN = Analog input or output CMOS = CMOS compatible input or output

/VPP RA3 TTL — General purpose input. Individually controlled interrupt-on-

MCLR

PP HV — Programming voltage.

/OSC2/CLKOUT RA4 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

T1G

OSC2 — XTAL Crystal/Resonator.

CLKOUT — CMOS F

T1CKI ST — Timer1 clock input.

OSC1 XTAL — Crystal/Resonator.

CLKIN ST — External clock input/RC oscillator connection.

C2IN+ AN — Comparator C2 non-inverting input.

C12IN1- AN — Comparator C1 or C2 inverting input.

C12IN2- AN — Comparator C1 or C2 inverting input.

C12IN3- AN — Comparator C1 or C2 inverting input.

C2OUT — CMOS Comparator C2 output.

TTL = TTL compatible input ST = Schmitt Trigger input with CMOS levels HV = High Voltage XTAL = Crystal

Output

Typ e

Individually enabled pull-up.

change.

ST — Master Clear with internal pull-up.

Individually enabled pull-up.

ST — Timer1 gate input.

OSC/4 output.

Individually enabled pull-up.

Description

PIC16F631/677/685/687/689/690

TABLE 1-1: PINOUT DESCRIPTION – PIC16F631 (CONTINUED)

Input

Name Function

RC6 RC6 ST CMOS General purpose I/O.

RC7 RC7 ST CMOS General purpose I/O.

SS VSS Power — Ground reference.

DD VDD Power — Positive supply.

Legend: AN = Analog input or output CMOS = CMOS compatible input or output

TTL = TTL compatible input ST = Schmitt Trigger input with CMOS levels HV = High Voltage XTAL = Crystal

Typ e

Output

Typ e

Description

PIC16F631/677/685/687/689/690

TABLE 1-2: PINOUT DESCRIPTION – PIC16F677

Input

Name Function

RA0/AN0/C1IN+/ICSPDAT/ ULPWU

RA1/AN1/C12IN0-/V ICSPCLK

RA2/AN2/T0CKI/INT/C1OUT RA2 ST CMOS General purpose I/O. Individually controlled interrupt-on-change.

RA3/MCLR

RA4/AN3/T1G

RA5/T1CKI/OSC1/CLKIN RA5 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

RB4/AN10/SDI/SDA RB4 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

RB5/AN11 RB5 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

RB6/SCK/SCL RB6 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

Legend: AN = Analog input or output CMOS = CMOS compatible input or output

/VPP RA3 TTL — General purpose input. Individually controlled interrupt-on-

TTL = TTL compatible input ST = Schmitt Trigger input with CMOS levels HV = High Voltage XTAL = Crystal

REF/

/OSC2/CLKOUT RA4 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

RA0 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

AN0 AN — A/D Channel 0 input.

C1IN+ AN — Comparator C1 non-inverting input.

ICSPDAT ST CMOS ICSP™ Data I/O.

ULPWU AN — Ultra Low-Power Wake-up input.

RA1 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

AN1 AN — A/D Channel 1 input.

C12IN0- AN — Comparator C1 or C2 inverting input.

REF AN — External Voltage Reference for A/D.

ICSPCLK ST — ICSP™ clock.

AN2 AN — A/D Channel 2 input.

T0CKI ST — Timer0 clock input.

INT ST — External interrupt pin.

C1OUT — CMOS Comparator C1 output.

MCLR

PP HV — Programming voltage.

AN3 AN — A/D Channel 3 input.

T1G

OSC2 — XTAL Crystal/Resonator.

CLKOUT — CMOS F

T1CKI ST — Timer1 clock input.

OSC1 XTAL — Crystal/Resonator.

CLKIN ST — External clock input/RC oscillator connection.

AN10 AN — A/D Channel 10 input.

SDI ST — SPI data input.

SDA ST OD I

AN11 AN — A/D Channel 11 input.

SCK ST CMOS SPI clock.

SCL ST OD I

Output

Typ e

Individually enabled pull-up.

change.

ST — Master Clear with internal pull-up.

Individually enabled pull-up.

ST — Timer1 gate input.

OSC/4 output.

Individually enabled pull-up.

C™ data input/output.

Individually enabled pull-up.

C™ clock.

Description

PIC16F631/677/685/687/689/690

TABLE 1-2: PINOUT DESCRIPTION – PIC16F677 (CONTINUED)

Input

Name Function

RB7 RB7 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.

RC0/AN4/C2IN+ RC0 ST CMOS General purpose I/O.

AN4 AN — A/D Channel 4 input.

C2IN+ AN — Comparator C2 non-inverting input.

RC1/AN5/C12IN1- RC1 ST CMOS General purpose I/O.

AN5 AN — A/D Channel 5 input.

C12IN1- AN — Comparator C1 or C2 inverting input.

RC2/AN6/C12IN2- RC2 ST CMOS General purpose I/O.

AN6 AN — A/D Channel 6 input.

C12IN2- AN — Comparator C1 or C2 inverting input.

RC3/AN7/C12IN3- RC3 ST CMOS General purpose I/O.

AN7 AN — A/D Channel 7 input.

C12IN3- AN — Comparator C1 or C2 inverting input.

RC4/C2OUT RC4 ST CMOS General purpose I/O.

C2OUT — CMOS Comparator C2 output.

RC5 RC5 ST CMOS General purpose I/O.

RC6/AN8/SS

RC7/AN9/SDO RC7 ST CMOS General purpose I/O.

SS VSS Power — Ground reference.

DD VDD Power — Positive supply.

Legend: AN = Analog input or output CMOS = CMOS compatible input or output

TTL = TTL compatible input ST = Schmitt Trigger input with CMOS levels HV = High Voltage XTAL = Crystal

RC6 ST CMOS General purpose I/O.

AN8 AN — A/D Channel 8 input.

AN9 AN — A/D Channel 9 input.

SDO — CMOS SPI data output.

Output

Typ e

Individually enabled pull-up.

ST — Slave Select input.

Description

PIC16F631/677/685/687/689/690

TABLE 1-3: PINOUT DESCRIPTION – PIC16F685

Input

Name Function

RA0/AN0/C1IN+/ICSPDAT/ ULPWU

RA1/AN1/C12IN0-/V

RA2/AN2/T0CKI/INT/C1OUT RA2 ST CMOS General purpose I/O. Individually controlled interrupt-on-

RA3/MCLR

RA4/AN3/T1G

RA5/T1CKI/OSC1/CLKIN RA5 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

RB4/AN10 RB4 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

RB5/AN11 RB5 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

RB6 RB6 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

RB7 RB7 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

RC0/AN4/C2IN+ RC0 ST CMOS General purpose I/O.

Legend: AN = Analog input or output CMOS = CMOS compatible input or output

/VPP RA3 TTL — General purpose input. Individually controlled interrupt-on-

TTL = TTL compatible input ST = Schmitt Trigger input with CMOS levels HV = High Voltage XTAL = Crystal

REF/ICSPCLK RA1 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

/OSC2/CLKOUT RA4 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

RA0 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

AN0 AN — A/D Channel 0 input.

C1IN+ AN — Comparator C1 positive input.

ICSPDAT TTL CMOS ICSP™ Data I/O.

ULPWU AN — Ultra Low-Power Wake-up input.

AN1 AN — A/D Channel 1 input.

C12IN0- AN — Comparator C1 or C2 negative input.

REF AN — External Voltage Reference for A/D.

ICSPCLK ST — ICSP™ clock.

AN2 AN — A/D Channel 2 input.

T0CKI ST — Timer0 clock input.

INT ST —

C1OUT — CMOS Comparator C1 output.

MCLR

PP HV — Programming voltage.

AN3 AN — A/D Channel 3 input.

T1G

OSC2 — XTAL Crystal/Resonator.

CLKOUT — CMOS F

T1CKI ST — Timer1 clock input.

OSC1 XTAL — Crystal/Resonator.

CLKIN ST — External clock input/RC oscillator connection.

AN10 AN — A/D Channel 10 input.

AN11 AN — A/D Channel 11 input.

AN4 AN — A/D Channel 4 input.

C2IN+ AN — Comparator C2 positive input.

Type

Output

Type

change. Individually enabled pull-up.

Description

External interrupt pin.

change.

ST — Master Clear with internal pull-up.

change. Individually enabled pull-up.

ST — Timer1 gate input.

OSC/4 output.

change. Individually enabled pull-up.

PIC16F631/677/685/687/689/690

TABLE 1-3: PINOUT DESCRIPTION – PIC16F685 (CONTINUED)

Input

Name Function

RC1/AN5/C12IN1- RC1 ST CMOS General purpose I/O.

AN5 AN — A/D Channel 5 input.

C12IN1- AN — Comparator C1 or C2 negative input.

RC2/AN6/C12IN2-/P1D RC2 ST CMOS General purpose I/O.

AN6 AN — A/D Channel 6 input.

C12IN2- AN — Comparator C1 or C2 negative input.

P1D — CMOS PWM output.

RC3/AN7/C12IN3-/P1C RC3 ST CMOS General purpose I/O.

AN7 AN — A/D Channel 7 input.

C12IN3- AN — Comparator C1 or C2 negative input.

P1C — CMOS PWM output.

RC4/C2OUT/P1B RC4 ST CMOS General purpose I/O.

C2OUT — CMOS Comparator C2 output.

P1B — CMOS PWM output.

RC5/CCP1/P1A RC5 ST CMOS General purpose I/O.

CCP1 ST CMOS Capture/Compare input.

P1A ST CMOS PWM output.

RC6/AN8 RC6 ST CMOS General purpose I/O.

AN8 AN — A/D Channel 8 input.

RC7/AN9 RC7 ST CMOS General purpose I/O.

AN9 AN — A/D Channel 9 input.

SS VSS Power — Ground reference.

DD VDD Power — Positive supply.

Legend: AN = Analog input or output CMOS = CMOS compatible input or output

TTL = TTL compatible input ST = Schmitt Trigger input with CMOS levels HV = High Voltage XTAL = Crystal

Type

Output

Type

Description

PIC16F631/677/685/687/689/690

TABLE 1-4: PINOUT DESCRIPTION – PIC16F687/PIC16F689

Input

Name Function

RA0/AN0/C1IN+/ICSPDAT/ ULPWU

RA1/AN1/C12IN0-/V

RA2/AN2/T0CKI/INT/C1OUT RA2 ST CMOS General purpose I/O. Individually controlled interrupt-on-

RA3/MCLR

RA4/AN3/T1G

RA5/T1CKI/OSC1/CLKIN RA5 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

RB4/AN10/SDI/SDA RB4 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

RB5/AN11/RX/DT RB5 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

Legend: AN = Analog input or output CMOS = CMOS compatible input or output OD = Open Drain

/VPP RA3 TTL — General purpose input. Individually controlled

TTL = TTL compatible input ST = Schmitt Trigger input with CMOS levels HV = High Voltage XTAL = Crystal

REF/ICSPCLK RA1 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

/OSC2/CLKOUT RA4 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

RA0 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

AN0 AN — A/D Channel 0 input.

C1IN+ AN — Comparator C1 positive input.

ICSPDAT TTL CMOS ICSP™ Data I/O.

ULPWU AN — Ultra Low-Power Wake-up input.

AN1 AN — A/D Channel 1 input.

C12IN0- AN — Comparator C1 or C2 negative input.

REF AN — External Voltage Reference for A/D.

ICSPCLK ST — ICSP™ clock.

AN2 AN — A/D Channel 2 input.

T0CKI ST — Timer0 clock input.

INT ST — External Interrupt.

C1OUT — CMOS Comparator C1 output.

MCLR

PP HV — Programming voltage.

AN3 AN — A/D Channel 3 input.

T1G

OSC2 — XTAL Crystal/Resonator.

CLKOUT — CMOS F

T1CKI ST — Timer1 clock input.

OSC1 XTAL — Crystal/Resonator.

CLKIN ST — External clock input/RC oscillator connection.

AN10 AN — A/D Channel 10 input.

SDI ST — SPI data input.

SDA ST OD I

AN11 AN — A/D Channel 11 input.

RX ST — EUSART asynchronous input.

DT ST CMOS EUSART synchronous data.

Output

Type

change. Individually enabled pull-up.

interrupt-on-change.

ST — Master Clear with internal pull-up.

change. Individually enabled pull-up.

ST — Timer1 gate input.

OSC/4 output.

change. Individually enabled pull-up.

C™ data input/output.

change. Individually enabled pull-up.

Description

PIC16F631/677/685/687/689/690

TABLE 1-4: PINOUT DESCRIPTION – PIC16F687/PIC16F689 (CONTINUED)

Input

Name Function

RB6/SCK/SCL RB6 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

SCK ST CMOS SPI clock.

SCL ST OD I

RB7/TX/CK RB7 TTL CMOS General purpose I/O. Individually controlled interrupt-on-

TX — CMOS EUSART asynchronous output.

CK ST CMOS EUSART synchronous clock.

RC0/AN4/C2IN+ RC0 ST CMOS General purpose I/O.

AN4 AN — A/D Channel 4 input.

C2IN+ AN — Comparator C2 positive input.

RC1/AN5/C12IN1- RC1 ST CMOS General purpose I/O.

AN5 AN — A/D Channel 5 input.

C12IN1- AN — Comparator C1 or C2 negative input.

RC2/AN6/C12IN2- RC2 ST CMOS General purpose I/O.

AN6 AN — A/D Channel 6 input.

C12IN2- AN — Comparator C1 or C2 negative input.

RC3/AN7/C12IN3- RC3 ST CMOS General purpose I/O.

AN7 AN — A/D Channel 7 input.

C12IN3- AN — Comparator C1 or C2 negative input.

RC4/C2OUT RC4 ST CMOS General purpose I/O.

C2OUT — CMOS Comparator C2 output.

RC5 RC5 ST CMOS General purpose I/O.

RC6/AN8/SS

RC7/AN9/SDO RC7 ST CMOS General purpose I/O.

SS VSS Power — Ground reference.

DD VDD Power — Positive supply.

Legend: AN = Analog input or output CMOS = CMOS compatible input or output OD = Open Drain

TTL = TTL compatible input ST = Schmitt Trigger input with CMOS levels HV = High Voltage XTAL = Crystal

RC6 ST CMOS General purpose I/O.

AN8 AN — A/D Channel 8 input.

AN9 AN — A/D Channel 9 input.

SDO — CMOS SPI data output.

Output

Type

change. Individually enabled pull-up.

C™ clock.

change. Individually enabled pull-up.

ST — Slave Select input.

Description

PIC16F631/677/685/687/689/690

TABLE 1-5: PINOUT DESCRIPTION – PIC16F690