PIC16F872_06 Datasheet, PDF (8/168 Pages) Microchip Technology – 28-Pin, 8-Bit CMOS Flash Microcontroller with 10-Bit A/D

PIC16F872
TABLE 1-2: PIC16F872 PINOUT DESCRIPTION (CONTINUED)
Pin Name
Pin#
I/O/P
Type
Buffer
Type
Description
RB0/INT
RB0
INT
PORTB is a bi-directional I/O port. PORTB can be software
programmed for internal weak pull-up on all inputs.
21
I/O TTL/ST⁽¹⁾
Digital I/O.
External interrupt pin.
RB1
22
I/O
TTL
Digital I/O.
RB2
23
I/O
TTL
Digital I/O.
RB3/PGM
RB3
PGM
24
I/O
TTL
Digital I/O.
Low voltage ICSP programming enable pin.
RB4
25
I/O
TTL
Digital I/O.
RB5
RB6/PGC
RB6
PGC
RB7/PGD
RB7
PGD
26
I/O
TTL
Digital I/O.
27
I/O TTL/ST⁽²⁾
Digital I/O.
In-Circuit Debugger and ICSP programming clock.
28
I/O TTL/ST⁽²⁾
Digital I/O.
In-Circuit Debugger and ICSP programming data.
PORTC is a bi-directional I/O port.
RC0/T1OSO/T1CKI 11
I/O
ST
RC0
Digital I/O.
T1OSO
Timer1 oscillator output.
T1CKI
Timer1 clock input.
RC1/T1OSI
RC1
T1OSI
12
I/O
ST
Digital I/O.
Timer1 oscillator input.
RC2/CCP1
RC2
CCP1
13
I/O
ST
Digital I/O.
Capture1 input/Compare1 output/PWM1 output.
RC3/SCK/SCL
RC3
SCK
SCL
14
I/O
ST
Digital I/O.
Synchronous serial clock input/output for SPI mode.
Synchronous serial clock input/output for I²C mode.
RC4/SDI/SDA
RC4
SDI
SDA
15
I/O
ST
Digital I/O.
SPI Data In pin (SPI mode).
SPI Data I/O pin (I²C mode).
RC5/SDO
RC5
SDO
16
I/O
ST
Digital I/O.
SPI Data Out pin (SPI mode).
RC6
17
I/O
ST
Digital I/O.
RC7
18
I/O
ST
Digital I/O.
VSS
8, 19
P
—
Ground reference for logic and I/O pins.
VDD
20
P
—
Positive supply for logic and I/O pins.
Legend: I = input
O = output
I/O = input/output
P = power
— = Not used
TTL = TTL input
ST = Schmitt Trigger input
Note 1: This buffer is a Schmitt Trigger input when configured as the external interrupt.
2: This buffer is a Schmitt Trigger input when used in Serial Programming mode.
DS30221C-page 6
© 2006 Microchip Technology Inc.