Datasheet

PIC16F627A/628A/648A
DS40044G-page 14 © 2009 Microchip Technology Inc.
RB4/PGM RB4 TTL CMOS Bidirectional I/O port. Interrupt-on-pin change.
Can be software programmed for internal
weak pull-up.
PGM ST — Low-voltage programming input pin. When
low-voltage programming is enabled, the
interrupt-on-pin change and weak pull-up
resistor are disabled.
RB5 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 ST — Timer1 clock input
PGC ST — 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 ST CMOS ICSP data I/O
V
SS VSS Power — Ground reference for logic and I/O pins
VDD 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 P = Power
— = Not used I = Input ST = Schmitt Trigger Input
TTL = TTL Input OD = Open Drain Output AN = Analog