PIC16F627A/628A/648A
TABLE 3-2:
Name
PIC16F627A/628A/648A PINOUT DESCRIPTION
Function Input Type Output Type
Description
RB4/PGM
RB4
TTL
ST
CMOS
—
Bi-directional 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
RB5
RB6
TTL
TTL
CMOS
CMOS
Bi-directional I/O port. Interrupt-on-pin
change. Can be software programmed for
internal weak pull-up.
Bi-directional I/O port. Interrupt-on-pin
change. Can be software programmed for
internal weak pull-up.
RB6/T±OSO/T±CKI/PGC
T±OSO
T±CKI
PGC
—
ST
XTAL
—
Timer± oscillator output.
Timer± clock input.
ST
—
ICSP Programming Clock.
RB7/T±OSI/PGD
RB7
TTL
CMOS
Bi-directional I/O port. Interrupt-on-pin
change. Can be software programmed for
internal weak pull-up.
T±OSI
PGD
VSS
XTAL
ST
—
CMOS
—
Timer± oscillator input.
ICSP Data I/O
VSS
VDD
Power
Power
Ground reference for logic and I/O pins
Positive supply for logic and I/O pins
VDD
—
Legend:
O = Output
— = Not used
TTL = TTL Input
CMOS = CMOS Output
P
= Power
I
OD
= Input
= Open Drain Output
ST = Schmitt Trigger Input
AN = Analog
DS40044A-page 12
Preliminary
2002 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
