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16F628AIML

Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

Microchip Technology 

PIC16F627A/628A/648A

TABLE 3-2: PIC16F627A/628A/648A PINOUT DESCRIPTION (CONTINUED)

Name

Function Input Type Output Type

Description

RB4/PGM

RB5

RB6/T1OSO/T1CKI/PGC

RB7/T1OSI/PGD

VSS

VDD

Legend: O = Output

— = Not used

TTL = TTL Input

RB4

PGM

RB5

RB6

T1OSO

T1CKI

PGC

RB7

T1OSI

PGD

VSS

VDD

TTL

CMOS Bidirectional I/O port. Interrupt-on-pin change.

Can be software programmed for internal

weak pull-up.

ST

—

Low-voltage programming input pin. When

low-voltage programming is enabled, the

interrupt-on-pin change and weak pull-up

resistor are disabled.

TTL

CMOS Bidirectional I/O port. Interrupt-on-pin change.

Can be software programmed for internal

weak pull-up.

TTL

CMOS Bidirectional I/O port. Interrupt-on-pin change.

Can be software programmed for internal

weak pull-up.

—

XTAL Timer1 oscillator output

ST

—

Timer1 clock input

ST

—

ICSP™ programming clock

TTL

CMOS Bidirectional I/O port. Interrupt-on-pin change.

Can be software programmed for internal

weak pull-up.

XTAL

—

Timer1 oscillator input

ST

CMOS ICSP data I/O

Power

—

Ground reference for logic and I/O pins

Power

—

Positive supply for logic and I/O pins

CMOS = CMOS Output

I

= Input

OD = Open Drain Output

P = Power

ST = Schmitt Trigger Input

AN = Analog

DS40044F-page 12

© 2007 Microchip Technology Inc.

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