PIC16C74A-20I/PT Ver la hoja de datos (PDF) - Microchip Technology

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PIC16C74A-20I/PT

8-Bit CMOS Microcontrollers with A/D Converter

Microchip Technology 

PIC16C7X

FIGURE 3-1: PIC16C72 BLOCK DIAGRAM

EPROM

Program

Memory

2K x 14

Program 14

Bus

Instruction reg

13

Program Counter

Data Bus

8

8 Level Stack

(13-bit)

RAM

File

Registers

128 x 8

RAM Addr(1)

9

Addr MUX

Direct Addr 7

Indirect

8 Addr

FSR reg

STATUS reg

8

Instruction

Decode &

Control

OSC1/CLKIN

OSC2/CLKOUT

Timing

Generation

Power-up

Timer

Oscillator

Start-up Timer

Power-on

Reset

Watchdog

Timer

Brown-out

Reset

3

MUX

ALU

8

W reg

PORTA

PORTB

PORTC

RA0/AN0

RA1/AN1

RA2/AN2

RA3/AN3/VREF

RA4/T0CKI

RA5/SS/AN4

RB0/INT

RB7:RB1

RC0/T1OSO/T1CKI

RC1/T1OSI

RC2/CCP1

RC3/SCK/SCL

RC4/SDI/SDA

RC5/SDO

RC6

RC7

Timer0

MCLR VDD, VSS

Timer1

Timer2

A/D

Synchronous

Serial Port

CCP1

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

DS30390E-page 10

© 1997 Microchip Technology Inc.

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