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DEVICE OVERVIEW

This document contains device specific information about the following devices:

? PIC16F873A

? PIC16F874A

? PIC16F876A

? PIC16F877A

PIC16F873A/876A devices are available only in 28-pin packages, while PIC16F874A/877A devices are available in 40-pin and 44-pin packages. All devices in the PIC16F87XA family share common architecture with the following differences:

? The PIC16F873A and PIC16F874A have one-half of the total on-chip memory of the PIC16F876A and PIC16F877A

? The 28-pin devices have three I/O ports, while the 40/44-pin devices have five

? The 28-pin devices have fourteen interrupts, while the 40/44-pin devices have fifteen

? The 28-pin devices have five A/D input channels, while the 40/44-pin devices have eight

? The Parallel Slave Port is implemented only on the 40/44-pin devices

Devices Included in this Data Sheet:

? PIC16F873A ? PIC16F874A

? PIC16F876A ? PIC16F877A

High-Performance RISC CPU:

? Only 35 single-word instructions to learn

? All single-cycle instructions except for program branches, which are two-cycle

? Operating speed: DC – 20 MHz clock input DC – 200 ns instruction cycle

? Up to 8K x 14 words of Flash Program Memory,

Up to 368 x 8 bytes of Data Memory (RAM),

Up to 256 x 8 bytes of EEPROM Data Memory

? Pinout compatible to other 28-pin or 40/44-pin PIC16CXXX and PIC16FXXX microcontrollers

Peripheral Features:

? Timer0: 8-bit timer/counter with 8-bit prescaler

? Timer1: 16-bit timer/counter with prescaler, can be incremented during Sleep via external crystal/clock

? Timer2: 8-bit timer/counter with 8-bit period register, prescaler and postscaler

? Two Capture, Compare, PWM modules

- Capture is 16-bit, max. resolution is 12.5 ns

- Compare is 16-bit, max. resolution is 200 ns

- PWM max. resolution is 10-bit

? Synchronous Serial Port (SSP) with SPI? (Master mode) and I2C? (Master/Slave)

? Universal Synchronous Asynchronous Receiver Transmitter (USART/SCI) with 9-bit address detection

? Parallel Slave Port (PSP) – 8 bits wide with external RD, WR and CS controls (40/44-pin only)

? Brown-out detection circuitry for Brown-out Reset (BOR)

Analog Features:

? 10-bit, up to 8-channel Analog-to-Digital Converter (A/D)

? Brown-out Reset (BOR)

? Analog Comparator module with:

- Two analog comparators

- Programmable on-chip voltage reference (VREF) module

- Programmable input multiplexing from device inputs and internal voltage reference

- Comparator outputs are externally accessible

Special Microcontroller Features:

? 100,000 erase/write cycle Enhanced Flash program memory typical

? 1,000,000 erase/write cycle Data EEPROM memory typical

? Data EEPROM Retention > 40 years

? Self-reprogrammable under software control

? In-Circuit Serial Programming? (ICSP?) via two pins

? Single-supply 5V In-Circuit Serial Programming

? Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable operation

? Programmable code protection

? Power saving Sleep mode

? Selectable oscillator options

? In-Circuit Debug (ICD) via two pins

CMOS Technology:

? Low-power, high-speed Flash/EEPROM technology

? Fully static design

? Wide operating voltage range (2.0V to 5.5V)

? Commercial and Industrial temperature ranges

? Low-power consumption