PIC16F737-I/SP【PDF 2/231 页】IC PIC MCU FLASH 4KX14 28DIP

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PIC16F7X7

DS30498C-page 8

2004 Microchip Technology Inc.

TABLE 1-2:

PIC16F737 AND PIC16F767 PINOUT DESCRIPTION

Pin Name

PDIP

SOIC

SSOP

Pin #

QFN

Pin #

I/O/P

Type

Buffer

Type

Description

OSC1/CLKI/RA7

OSC1

CLKI

RA7

I/O

ST/CMOS(3)

Oscillator crystal or external clock input.

Oscillator crystal input or external clock source input. ST

buffer when configured in RC mode; otherwise CMOS.

External clock source input. Always associated with pin

function OSC1 (see OSC1/CLKI, OSC2/CLKO pins).

Digital I/O.

OSC2/CLKO/RA6

OSC2

CLKO

RA6

I/O

—

Oscillator crystal or clock output.

Oscillator crystal output.

Connects to crystal or resonator in Crystal Oscillator

mode.

In RC mode, OSC2 pin outputs CLKO which has 1/4 the

frequency of OSC1 and denotes the instruction cycle rate.

Digital I/O.

MCLR/VPP/RE3

MCLR

VPP

RE3

126

Master Clear (input) or programming voltage (output).

Master Clear (Reset) input. This pin is an active-low

Reset to the device.

Programming voltage input.

Digital input only pin.

PORTA is a bidirectional I/O port.

RA0/AN0

RA0

AN0

227

I/O

TTL

Digital I/O.

Analog input 0.

RA1/AN1

RA1

AN1

328

I/O

TTL

Digital I/O.

Analog input 1.

RA2/AN2/VREF-/CVREF

RA2

AN2

VREF-

CVREF

I/O

TTL

Digital I/O.

Analog input 2.

A/D reference voltage input (low).

Comparator voltage reference output.

RA3/AN3/VREF+

RA3

AN3

VREF+

I/O

TTL

Digital I/O.

Analog input 3.

A/D reference voltage input (high).

RA4/T0CKI/C1OUT

RA4

T0CKI

C1OUT

I/O

Digital I/O – Open-drain when configured as output.

Timer0 external clock input.

Comparator 1 output bit.

RA5/AN4/LVDIN/SS/C2OUT

RA5

AN4

LVDIN

C2OUT

I/O

TTL

Digital I/O.

Analog input 4.

Low-Voltage Detect input.

SPI slave select input.

Comparator 2 output bit.

Legend:

I = input

O = output

I/O = input/output

P = power

— = Not used

TTL = TTL input

ST = Schmitt Trigger input

Note

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.

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

Pin location of CCP2 is determined by the CCPMX bit in Configuration Word Register 1.

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