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componentes Descripción

Fabricante

CF745

EPROM/ROM-Based 8-Bit CMOS Microcontroller Series

Microchip Technology 

PIC16C5X

TABLE 3-2:

PINOUT DESCRIPTION - PIC16C55s, PIC16C57s, PIC16CR57s

Name

DIP, SOIC SSOP I/O/P Input

No.

No. Type Levels

Description

RA0

6

5 I/O TTL Bi-directional I/O port

RA1

7

6 I/O TTL

RA2

8

7 I/O TTL

RA3

9

8 I/O TTL

RB0

RB1

RB2

RB3

RB4

RB5

RB6

RB7

RC0

RC1

RC2

RC3

RC4

RC5

RC6

RC7

10

9 I/O TTL Bi-directional I/O port

11

10 I/O TTL

12

11 I/O TTL

13

12 I/O TTL

14

13 I/O TTL

15

15 I/O TTL

16

16 I/O TTL

17

17 I/O TTL

18

18 I/O TTL Bi-directional I/O port

19

19 I/O TTL

20

20 I/O TTL

21

21 I/O TTL

22

22 I/O TTL

23

23 I/O TTL

24

24 I/O TTL

25

25 I/O TTL

T0CKI

1

2

I

ST Clock input to Timer0. Must be tied to VSS or VDD if not in use

to reduce current consumption.

MCLR

28

OSC1/CLKIN

27

OSC2/CLKOUT

26

28

I

ST Master clear (reset) input. This pin is an active low reset to the

device.

27

I

ST Oscillator crystal input/external clock source input.

26 O — Oscillator crystal output. Connects to crystal or resonator in

crystal oscillator mode. In RC mode, OSC2 pin outputs

CLKOUT which has 1/4 the frequency of OSC1, and denotes

the instruction cycle rate.

VDD

2

3,4 P

—

VSS

4

1,14 P

—

N/C

3,5

—— —

Legend: I = input, O = output, I/O = input/output,

P = power, — = Not Used,

TTL = TTL input, ST = Schmitt Trigger input

Positive supply for logic and I/O pins.

Ground reference for logic and I/O pins.

Unused, do not connect

DS30453B-page 12

Preliminary

© 1998 Microchip Technology Inc.

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