PIC16F87X Datasheet, PDF(7/218 Page) Microchip Technology – 28/40-pin 8-Bit CMOS FLASH Microcontrollers

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PIC16F87X Datasheet, PDF (7/218 Pages) Microchip Technology – 28/40-pin 8-Bit CMOS FLASH Microcontrollers

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PIC16F87X

1.0 DEVICE OVERVIEW

This document contains device specific information.

Additional information may be found in the PICmicroâ¢

Mid-Range Reference Manual (DS33023), which may

be obtained from your local Microchip Sales Represen-

tative or downloaded from the Microchip website. The

Reference Manual should be considered a complemen-

tary document to this data sheet, and is highly recom-

mended reading for a better understanding of the device

architecture and operation of the peripheral modules.

There are four devices (PIC16F873, PIC16F874,

PIC16F876 and PIC16F877) covered by this data

sheet. The PIC16F876/873 devices come in 28-pin

packages and the PIC16F877/874 devices come in

40-pin packages. The Parallel Slave Port is not

implemented on the 28-pin devices.

The following device block diagrams are sorted by pin

number; 28-pin for Figure 1-1 and 40-pin for Figure 1-2.

The 28-pin and 40-pin pinouts are listed in Table 1-1

and Table 1-2, respectively.

FIGURE 1-1:

PIC16F873 AND PIC16F876 BLOCK DIAGRAM

Device

PIC16F873

PIC16F876

Program

FLASH

Data Memory

192 Bytes

368 Bytes

Data

EEPROM

128 Bytes

256 Bytes

FLASH

Program

Memory

Program Counter

8 Level Stack

(13-bit)

Data Bus

RAM

File

Registers

Program

Bus

Instruction reg

RAM Addr(1)

Addr MUX

Direct Addr 7

Indirect

8 Addr

FSR reg

STATUS reg

Instruction

Decode &

Control

OSC1/CLKIN

OSC2/CLKOUT

Timing

Generation

Power-up

Timer

Oscillator

Start-up Timer

Power-on

Reset

Watchdog

Timer

Brown-out

Reset

In-Circuit

Debugger

Low Voltage

Programming

MUX

ALU

W reg

PORTA

PORTB

PORTC

RA0/AN0

RA1/AN1

RA2/AN2/VREF-

RA3/AN3/VREF+

RA4/T0CKI

RA5/AN4/SS

RB0/INT

RB1

RB2

RB3/PGM

RB4

RB5

RB6/PGC

RB7/PGD

RC0/T1OSO/T1CKI

RC1/T1OSI/CCP2

RC2/CCP1

RC3/SCK/SCL

RC4/SDI/SDA

RC5/SDO

RC6/TX/CK

RC7/RX/DT

Timer0

MCLR VDD, VSS

Timer1

Timer2

10-bit A/D

Data EEPROM

CCP1,2

Synchronous

Serial Port

Note 1: Higher order bits are from the STATUS register.

USART

DS30292C-page 5

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