PIC16F72SLASHML datasheet(7/136 Pages) MICROCHIP

7 / 136 page

 2002 Microchip Technology Inc.

DS39597B-page 5

PIC16F72

1.0

DEVICE OVERVIEW

This document contains device specific information for

the operation of the PIC16F72 device. Additional infor-

mation may be found in the PICmicro™ Mid-Range

MCU Reference Manual (DS33023), which may be

downloaded from the Microchip website. The Refer-

ence Manual should be considered a complementary

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.

The PIC16F72 belongs to the Mid-Range family of the

PICmicro devices. A block diagram of the device is

shown in Figure 1-1.

The program memory contains 2K words, which trans-

late to 2048 instructions, since each 14-bit program

memory word is the same width as each device

instruction. The data memory (RAM) contains 128 bytes.

There are 22 I/O pins that are user configurable on a

pin-to-pin basis. Some pins are multiplexed with other

device functions. These functions include:

• External interrupt

• Change on PORTB interrupt

• Timer0 clock input

• Timer1 clock/oscillator

• Capture/Compare/PWM

• A/D converter

• SPI/I2C

Table 1-1 details the pinout of the device with

descriptions and details for each pin.

FIGURE 1-1:

PIC16F72 BLOCK DIAGRAM

FLASH

Memory

2K x 14

Data Bus

Program

Bus

Instruction reg

Program Counter

8-Level Stack

(13-bit)

RAM

File

Registers

128 x 8

Direct Addr

RAM Addr(1)

Addr MUX

Indirect

Addr

FSR reg

STATUS reg

MUX

ALU

W reg

Power-up

Timer

Oscillator

Start-up Timer

Power-on

Reset

Watchdog

Timer

Instruction

Decode &

Control

Timing

Generation

OSC1/CLKI

OSC2/CLKO

MCLR

VDD, VSS

Timer0

A/D

Synchronous

Serial Port

PORTA

PORTC

RC0/T1OSO/T1CKI

RC1/T1OSI

RC2/CCP1

RC3/SCK/SCL

RC4/SDI/SDA

RC5/SDO

RC6

RC7

Brown-out

Reset

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

CCP1

Timer1

Timer2

RA4/T0CKI

RA5/AN4/SS

RA3/AN3/VREF

RA2/AN2

RA1/AN1

RA0/AN0

Program

PORTB

RB0/INT

RB1

RB2

RB3

RB4

RB5

RB6/PGC

RB7/PGD

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