PIC16F7X
TABLE 1-3:
Pin Name
PIC16F74 AND PIC16F77 PINOUT DESCRIPTION (CONTINUED)
DIP
Pin#
PLCC
Pin#
QFP
Pin#
I/O/P
Type
Buffer
Type
Description
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
RB1
RB2
RB3/PGM
RB3
PGM
RB4
RB5
RB6/PGC
RB6
PGC
RB7/PGD
RB7
PGD
RC0/T1OSO/T1CKI
RC0
T1OSO
T1CKI
RC1/T1OSI/CCP2
RC1
T1OSI
CCP2
RC2/CCP1
RC2
CCP1
RC3/SCK/SCL
RC3
SCK
SCL
RC4/SDI/SDA
RC4
SDI
SDA
RC5/SDO
RC5
SDO
RC6/TX/CK
RC6
TX
CK
RC7/RX/DT
RC7
RX
DT
Legend:
Note 1:
2:
3:
4:
33
36
8
I/O
I
TTL/ST
(1)
Digital I/O.
External interrupt.
TTL
TTL
TTL
I/O
I/O
Digital I/O.
Low voltage ICSP programming enable pin.
TTL
TTL
TTL/ST
I/O
I/O
(2)
34
35
36
37
38
39
9
10
11
I/O
I/O
Digital I/O.
Digital I/O.
37
38
39
41
42
43
14
15
16
I/O
I/O
Digital I/O.
Digital I/O.
Digital I/O.
In-Circuit Debugger and ICSP programming clock.
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.
ST
I/O
O
I
Digital I/O.
Timer1 oscillator output.
Timer1 external clock input.
ST
I/O
I
I/O
Digital I/O.
Timer1 oscillator input.
Capture2 input, Compare2 output, PWM2 output.
ST
I/O
I/O
Digital I/O.
Capture1 input/Compare1 output/PWM1 output
ST
I/O
I/O
I/O
Digital I/O
Synchronous serial clock input/output for SPI mode.
Synchronous serial clock input/output for I
2
C mode.
ST
I/O
I
I/O
Digital I/O.
SPI data in.
I
2
C data I/O.
ST
I/O
O
Digital I/O.
SPI data out.
ST
I/O
O
I/O
Digital I/O.
USART asynchronous transmit.
USART 1 synchronous clock.
ST
I/O
I
I/O
Digital I/O.
USART asynchronous receive.
USART synchronous data.
15
16
32
16
18
35
17
19
36
18
20
37
23
25
42
24
26
43
25
27
44
26
29
1
I = input
O = output
I/O = input/output
P = power
— = Not used
TTL = TTL input
ST = Schmitt Trigger input
This buffer is a Schmitt Trigger input when configured as an external interrupt.
This buffer is a Schmitt Trigger input when used in Serial Programming mode.
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).
This buffer is a Schmitt Trigger input when configured in RC Oscillator mode and a CMOS input otherwise.
2002 Microchip Technology Inc.
DS30325B-page 11
MICROCHIP [ MICROCHIP TECHNOLOGY ]
