Datasheet
2002 Microchip Technology Inc. DS30325B-page 11
PIC16F7X
PORTB is a bi-directional I/O port. PORTB can be software
programmed for internal weak pull-up on all inputs.
RB0/INT
RB0
INT
33 36 8
I/O
I
TTL/ST
(1)
Digital I/O.
External interrupt.
RB1 34 37 9
I/O
TTL Digital I/O.
RB2 353810
I/O
TTL Digital I/O.
RB3/PGM
RB3
PGM
36 39 11
I/O
I/O
TTL
Digital I/O.
Low voltage ICSP programming enable pin.
RB4 374114
I/O
TTL Digital I/O.
RB5 384215
I/O
TTL Digital I/O.
RB6/PGC
RB6
PGC
39 43 16
I/O
I/O
TTL/ST
(2)
Digital I/O.
In-Circuit Debugger and ICSP programming clock.
RB7/PGD
RB7
PGD
40 44 17
I/O
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
RC0
T1OSO
T1CKI
15 16 32
I/O
O
I
ST
Digital I/O.
Timer1 oscillator output.
Timer1 external clock input.
RC1/T1OSI/CCP2
RC1
T1OSI
CCP2
16 18 35
I/O
I
I/O
ST
Digital I/O.
Timer1 oscillator input.
Capture2 input, Compare2 output, PWM2 output.
RC2/CCP1
RC2
CCP1
17 19 36
I/O
I/O
ST
Digital I/O.
Capture1 input/Compare1 output/PWM1 output
RC3/SCK/SCL
RC3
SCK
SCL
18 20 37
I/O
I/O
I/O
ST
Digital I/O
Synchronous serial clock input/output for SPI mode.
Synchronous serial clock input/output for I
2
C mode.
RC4/SDI/SDA
RC4
SDI
SDA
23 25 42
I/O
I
I/O
ST
Digital I/O.
SPI data in.
I
2
C data I/O.
RC5/SDO
RC5
SDO
24 26 43
I/O
O
ST
Digital I/O.
SPI data out.
RC6/TX/CK
RC6
TX
CK
25 27 44
I/O
O
I/O
ST
Digital I/O.
USART asynchronous transmit.
USART 1 synchronous clock.
RC7/RX/DT
RC7
RX
DT
26 29 1
I/O
I
I/O
ST
Digital I/O.
USART asynchronous receive.
USART synchronous data.
TABLE 1-3: PIC16F74 AND PIC16F77 PINOUT DESCRIPTION (CONTINUED)
Pin Name
DIP
Pin#
PLCC
Pin#
QFP
Pin#
I/O/P
Type
Buffer
Type
Description
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 an external interrupt.
2: This buffer is a Schmitt Trigger input when used in Serial Programming mode.
3: This buffer is a Schmitt Trigger input when configured as general purpose I/O and a TTL input when used in the Parallel
Slave Port mode (for interfacing to a microprocessor bus).
4: This buffer is a Schmitt Trigger input when configured in RC Oscillator mode and a CMOS input otherwise.