PIC16F871 Datasheet

IC型号：
PIC16F871
PDF描述：
28/40-Pin, 8-Bit CMOS FLASH Microcontrollers
文件大小：
1755.40KB
PDF页数：
172页
芯片厂家：
Microchip

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PIC16F870/871

TABLE 1-2:

Pin Name

OSC1/CLKIN

OSC2/CLKOUT

PIC16F871 PINOUT DESCRIPTION

DIP

Pin#

PLCC

Pin#

QFP

Pin#

I/O/P

Type

Buffer

Type

ST/CMOS

(4)

鈥?/div>

Description

Oscillator crystal input/external clock source input.

Oscillator crystal output. Connects to crystal or resonator in

crystal oscillator mode. In RC mode, OSC2 pin outputs CLK-

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

instruction cycle rate.

Master clear (reset) input or programming voltage input or high

voltage test mode control. This pin is an active low reset to the

device.

PORTA is a bi-directional I/O port.

RA0 can also be analog input0

RA1 can also be analog input1

RA2 can also be analog input2 or negative analog

reference voltage

RA3 can also be analog input3 or positive analog

reference voltage

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

counter. Output is open drain type.

RA5 can also be analog input4

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

programmed for internal weak pull-up on all inputs.

MCLR/V

/THV

I/P

RA0/AN0

RA1/AN1

RA2/AN2/V

REF

RA3/AN3/V

REF

RA4/T0CKI

RA5/AN4

I/O

TTL

RB0/INT

RB1

RB2

RB3/PGM

RB4

RB5

RB6/PGC

RB7/PGD

I/O

TTL/ST

(1)

TTL

TTL/ST

(1)

TTL

TTL/ST

(2)

TTL/ST

(2)

RB0 can also be the external interrupt pin.

RB3 can also be the low voltage programming input

Interrupt on change pin.

Interrupt on change pin or In-Circuit Debugger pin. Serial

programming clock.

Interrupt on change pin or In-Circuit Debugger pin. Serial

programming data.

PORTC is a bi-directional I/O port.

RC0 can also be the Timer1 oscillator output or a Timer1

clock input.

RC1 can also be the Timer1 oscillator input

RC2 can also be the Capture1 input/Compare1 output/

PWM1 output.

RC0/T1OSO/T1CKI

RC1/T1OSI

RC2/CCP1

RC3

RC4

RC5

RC6/TX/CK

RC7/RX/DT

Legend:

Note 1:

I = input

I/O

RC6 can also be the USART Asynchronous Transmit or

Synchronous Clock.

RC7 can also be the USART Asynchronous Receive or

Synchronous Data.

O = output

I/O = input/output

P = power

鈥?= Not used

TTL = TTL input

ST = Schmitt Trigger input

This buffer is a Schmitt Trigger input when configured as an external interrupt or LVP mode.

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

This buffer is a Schmitt Trigger input when configured as general purpose I/O and a TTL input when used in the Parallel Slave

Port mode (for interfacing to a microprocessor bus).

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

DS30569A-page 8

Preliminary

漏

1999 Microchip Technology Inc.

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