PIC16F-ESLASHML datasheet(14/178 Pages) MICROCHIP

14 / 178 page

PIC16F627A/628A/648A

DS40044F-page 12

RB4/PGM

RB4

TTL

CMOS

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

Can be software programmed for internal

weak pull-up.

PGM

—

Low-voltage programming input pin. When

low-voltage programming is enabled, the

interrupt-on-pin change and weak pull-up

resistor are disabled.

RB5

TTL

CMOS

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

Can be software programmed for internal

weak pull-up.

RB6/T1OSO/T1CKI/PGC

RB6

TTL

CMOS

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

Can be software programmed for internal

weak pull-up.

T1OSO

—

XTAL

Timer1 oscillator output

T1CKI

—

Timer1 clock input

PGC

—

ICSP™ programming clock

RB7/T1OSI/PGD

RB7

TTL

CMOS

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

Can be software programmed for internal

weak pull-up.

T1OSI

XTAL

—

Timer1 oscillator input

PGD

CMOS

ICSP data I/O

VSS

Power

—

Ground reference for logic and I/O pins

VDD

Power

—

Positive supply for logic and I/O pins

TABLE 3-2:

PIC16F627A/628A/648A PINOUT DESCRIPTION (CONTINUED)

Name

Function

Input Type Output Type

Description

Legend:

O = Output

CMOS = CMOS Output

= Power

— = Not used

= Input

ST = Schmitt Trigger Input

TTL = TTL Input

= Open Drain Output

AN = Analog

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