PIC16C620 datasheet(13/128 Pages) MICROCHIP

13 / 128 page

 2003 Microchip Technology Inc.

DS30235J-page 11

PIC16C62X

TABLE 3-1:

PIC16C62X PINOUT DESCRIPTION

Name

DIP/SOIC

Pin #

SSOP

Pin #

I/O/P Type

Buffer

Type

Description

OSC1/CLKIN

ST/CMOS

Oscillator crystal input/external clock source input.

OSC2/CLKOUT

—

Oscillator crystal output. Connects to crystal or resonator

in Crystal Oscillator mode. In RC mode, OSC2 pin out-

puts CLKOUT, which has 1/4 the frequency of OSC1

and denotes the instruction cycle rate.

MCLR/V

I/P

Master Clear (Reset) input/programming voltage input.

This pin is an Active Low Reset to the device.

PORTA is a bi-directional I/O port.

RA0/AN0

I/O

Analog comparator input

RA1/AN1

I/O

Analog comparator input

RA2/AN2/V

REF

I/O

Analog comparator input or V

REF output

RA3/AN3

I/O

Analog comparator input /output

RA4/T0CKI

I/O

Can be selected to be the clock input to the Timer0

timer/counter or a comparator output. Output is

open drain type.

PORTB is a bi-directional I/O port. PORTB can be

software programmed for internal weak pull-up on all

inputs.

RB0/INT

I/O

TTL/ST(1)

RB0/INT can also be selected as an external

interrupt pin.

RB1

I/O

TTL

RB2

I/O

TTL

RB3

I/O

TTL

RB4

I/O

TTL

Interrupt-on-change pin.

RB5

I/O

TTL

Interrupt-on-change pin.

RB6

I/O

TTL/ST(2)

Interrupt-on-change pin. Serial programming clock.

RB7

I/O

TTL/ST(2)

Interrupt-on-change pin. Serial programming data.

5,6

—

Ground reference for logic and I/O pins.

15,16

—

Positive supply for logic and I/O pins.

Legend:

O = output

I/O = input/output

P = power

— = Not used

I = Input

ST = Schmitt Trigger input

TTL = TTL input

Note

1: This buffer is a Schmitt Trigger input when configured as the external interrupt.

2: This buffer is a Schmitt Trigger input when used in Serial Programming mode.

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