PIC16F84A datasheet(15/337 Pages) MICROCHIP

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DS30234D-page 15

PIC16C6X

TABLE 3-2:

PIC16C62/62A/R62/63/R63/66 PINOUT DESCRIPTION

Pin Name

Pin#

Pin Type

Buffer

Type

Description

OSC1/CLKIN

ST/CMOS(3)

Oscillator crystal input/external clock source input.

OSC2/CLKOUT

—

Oscillator crystal output. Connects to crystal or resonator in crys-

tal oscillator mode. In RC mode, the pin outputs CLKOUT which

has 1/4 the frequency of OSC1, and denotes the instruction cycle

rate.

MCLR/VPP

I/P

Master clear reset input or programming voltage input. This pin is

an active low reset to the device.

PORTA is a bi-directional I/O port.

RA0

I/O

TTL

RA1

I/O

TTL

RA2

I/O

TTL

RA3

I/O

TTL

RA4/T0CKI

I/O

RA4 can also be the clock input to the Timer0 timer/counter.

Output is open drain type.

RA5/SS

I/O

TTL

RA5 can also be the slave select for the synchronous serial

port.

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

grammed for internal weak pull-up on all inputs.

RB0/INT

I/O

TTL/ST(4)

RB0 can also be the 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(5)

Interrupt on change pin. Serial programming clock.

RB7

I/O

TTL/ST(5)

Interrupt on change pin. Serial programming data.

PORTC is a bi-directional I/O port.

RC0/T1OSO(1)/T1CKI

I/O

RC0 can also be the Timer1 oscillator output(1) or Timer1

clock input.

RC1/T1OSI(1)/CCP2(2)

I/O

RC1 can also be the Timer1 oscillator input(1) or Capture2

input/Compare2 output/PWM2 output(2).

RC2/CCP1

I/O

RC2 can also be the Capture1 input/Compare1 out-

put/PWM1 output.

RC3/SCK/SCL

I/O

RC3 can also be the synchronous serial clock input/output

for both SPI and I2C modes.

RC4/SDI/SDA

I/O

RC4 can also be the SPI Data In (SPI mode) or

data I/O (I2C mode).

RC5/SDO

I/O

RC5 can also be the SPI Data Out (SPI mode).

RC6/TX/CK(2)

I/O

RC6 can also be the USART Asynchronous Transmit(2) or

Synchronous Clock(2).

RC7/RX/DT(2)

I/O

RC7 can also be the USART Asynchronous Receive(2) or

Synchronous Data(2).

VSS

8,19

—

Ground reference for logic and I/O pins.

VDD

—

Positive supply for logic and I/O pins.

Legend: I = input

O = output

I/O = input/output

P = power

— = Not used

TTL = TTL input

ST = Schmitt Trigger input

Note 1:

Pin functions T1OSO and T1OSI are reversed on the PIC16C62.

The USART and CCP2 are not available on the PIC16C62/62A/R62.

This buffer is a Schmitt Trigger input when conﬁgured in RC oscillator mode and a CMOS input otherwise.

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

This buffer is a Schmitt Trigger input when used in serial programming mode.

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