PIC16C774I データシートの表示（PDF） - Microchip Technology

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PIC16C774I

28/40-Pin, 8-Bit CMOS Microcontrollers w/ 12-Bit A/D

Microchip Technology 

PIC16C77X

TABLE 1-1 PIC16C773 PINOUT DESCRIPTION

Pin Name

DIP,

SSOP,

SOIC

Pin#

I/O/P

Type

Buffer

Type

Description

OSC1/CLKIN

9

I

ST/CMOS(3) Oscillator crystal input/external clock source input.

OSC2/CLKOUT

10

O

—

Oscillator crystal output. Connects to crystal or resonator in crystal

oscillator mode. In RC mode, the OSC2 pin outputs CLKOUT which has

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

MCLR/VPP

1

I/P

ST

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/AN0

2

I/O

TTL

RA0 can also be analog input0

RA1/AN1

3

I/O

TTL

RA1 can also be analog input1

RA2/AN2/VREF-/VRL

4

I/O

TTL

RA2 can also be analog input2 or negative analog reference voltage

input or internal voltage reference low

RA3/AN3/VREF+/VRH

5

I/O

TTL

RA3 can also be analog input3 or positive analog reference voltage

input or internal voltage reference high

RA4/T0CKI

6

I/O

ST

RA4 can also be the clock input to the Timer0 module. Output is

open drain type.

RB0/INT

RB1/SS

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

grammed for internal weak pull-up on all inputs.

21

I/O

TTL/ST(1)

RB0 can also be the external interrupt pin.

22

I/O

TTL/ST(1)

RB1 can also be the SSP slave select

RB2/AN8

23

I/O

TTL

RB2 can also be analog input8

RB3/AN9/LVDIN

24

I/O

TTL

RB3 can also be analog input9 or the low voltage detect input

reference

RB4

25

I/O

TTL

Interrupt on change pin.

RB5

RB6

RB7

26

I/O

TTL

Interrupt on change pin.

27

I/O

TTL/ST(2)

Interrupt on change pin. Serial programming clock.

28

I/O

TTL/ST(2)

Interrupt on change pin. Serial programming data.

PORTC is a bi-directional I/O port.

RC0/T1OSO/T1CKI

11

I/O

ST

RC0 can also be the Timer1 oscillator output or Timer1 clock input.

RC1/T1OSI/CCP2

12

I/O

ST

RC1 can also be the Timer1 oscillator input or Capture2 input/

Compare2 output/PWM2 output.

RC2/CCP1

13

I/O

ST

RC2 can also be the Capture1 input/Compare1 output/PWM1

output.

RC3/SCK/SCL

14

I/O

ST

RC3 can also be the synchronous serial clock input/output for both

SPI and I2C modes.

RC4/SDI/SDA

15

I/O

ST

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

data I/O (I2C mode).

RC5/SDO

16

I/O

ST

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

RC6/TX/CK

17

I/O

ST

RC6 can also be the USART Asynchronous Transmit or

Synchronous Clock.

RC7/RX/DT

18

I/O

ST

RC7 can also be the USART Asynchronous Receive or

Synchronous Data.

AVSS

8

P

Ground reference for A/D converter

AVDD

7

P

Positive supply for A/D converter

VSS

19

P

—

Ground reference for logic and I/O pins.

VDD

20

P

—

Positive supply for logic and I/O pins.

Legend:

Note 1:

2:

3:

I = input O = output

I/O = input/output

P = power

— = Not used

TTL = TTL input

ST = Schmitt Trigger input

This buffer is a Schmitt Trigger input when configured for the multiplexed function.

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

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

 1999-2013 Microchip Technology Inc.

Advance Information

DS30275B-page 7

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