PIC16F7X
TABLE 1-3:
PIC16F74 AND PIC16F77 PINOUT DESCRIPTION (CONTINUED)
DIP
Pin#
PLCC
Pin#
QFP
Pin#
I/O/P
Type
Buffer
Type
Pin Name
Description
PORTD is a bi-directional I/O port or parallel slave port
when interfacing to a microprocessor bus.
(3)
RD0/PSP0
RD0
19
20
21
22
27
28
29
30
21
22
23
24
30
31
32
33
38
39
40
41
2
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
I/O
I/O
Digital I/O.
Parallel Slave Port data.
PSP0
(3)
(3)
(3)
(3)
(3)
(3)
(3)
RD1/PSP1
RD1
I
I/O
I/O
Digital I/O.
Parallel Slave Port data.
PSP1
RD2/PSP2
RD2
I
I/O
I/O
Digital I/O.
Parallel Slave Port data.
PSP2
RD3/PSP3
RD3
I/O
I/O
Digital I/O.
Parallel Slave Port data.
PSP3
RD4/PSP4
RD4
I/O
I/O
Digital I/O.
Parallel Slave Port data.
PSP4
RD5/PSP5
RD5
3
I/O
I/O
Digital I/O.
Parallel Slave Port data.
PSP5
RD6/PSP6
RD6
4
I/O
I/O
Digital I/O.
Parallel Slave Port data.
PSP6
RD7/PSP7
RD7
5
I/O
I/O
Digital I/O.
Parallel Slave Port data.
PSP7
PORTE is a bi-directional I/O port.
(3)
(3)
(3)
RE0/RD/AN5
RE0
8
9
9
25
26
27
ST/TTL
ST/TTL
ST/TTL
I/O
I
I
Digital I/O.
Read control for parallel slave port .
Analog input 5.
RD
AN5
RE1/WR/AN6
RE1
10
11
I/O
I
I
Digital I/O.
Write control for parallel slave port .
Analog input 6.
WR
AN6
RE2/CS/AN7
RE2
10
I/O
Digital I/O.
CS
AN7
I
I
Chip select control for parallel slave port .
Analog input 7.
VSS
VDD
NC
12,31 13,34
11,32 12,35
6,29
7,28
P
P
—
—
—
Ground reference for logic and I/O pins.
Positive supply for logic and I/O pins.
—
1,17,2 12,13,
8, 40 33, 34
These pins are not internally connected. These pins should
be left unconnected.
Legend:
I = input
— = Not used
O = output
TTL = TTL input
I/O = input/output
ST = Schmitt Trigger input
P = power
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.
DS30325B-page 12
2002 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
