PIC16F7X
DS30325B-page 12
2002 Microchip Technology Inc.
PORTD is a bi-directional I/O port or parallel slave port
when interfacing to a microprocessor bus.
RD0/PSP0
RD0
PSP0
19
21
38
I/O
ST/TTL(3)
Digital I/O.
Parallel Slave Port data.
RD1/PSP1
RD1
PSP1
20
22
39
I
I/O
ST/TTL(3)
Digital I/O.
Parallel Slave Port data.
RD2/PSP2
RD2
PSP2
21
23
40
I
I/O
ST/TTL(3)
Digital I/O.
Parallel Slave Port data.
RD3/PSP3
RD3
PSP3
22
24
41
I/O
ST/TTL(3)
Digital I/O.
Parallel Slave Port data.
RD4/PSP4
RD4
PSP4
27
30
2
I/O
ST/TTL(3)
Digital I/O.
Parallel Slave Port data.
RD5/PSP5
RD5
PSP5
28
31
3
I/O
ST/TTL(3)
Digital I/O.
Parallel Slave Port data.
RD6/PSP6
RD6
PSP6
29
32
4
I/O
ST/TTL(3)
Digital I/O.
Parallel Slave Port data.
RD7/PSP7
RD7
PSP7
30
33
5
I/O
ST/TTL(3)
Digital I/O.
Parallel Slave Port data.
PORTE is a bi-directional I/O port.
RE0/RD/AN5
RE0
RD
AN5
89
25
I/O
I
ST/TTL(3)
Digital I/O.
Read control for parallel slave port .
Analog input 5.
RE1/WR/AN6
RE1
WR
AN6
910
26
I/O
I
ST/TTL(3)
Digital I/O.
Write control for parallel slave port .
Analog input 6.
RE2/CS/AN7
RE2
CS
AN7
10
11
27
I/O
I
ST/TTL(3)
Digital I/O.
Chip select control for parallel slave port .
Analog input 7.
VSS
12,31
13,34
6,29
P
—
Ground reference for logic and I/O pins.
VDD
11,32
12,35
7,28
P
—
Positive supply for logic and I/O pins.
NC
—
1,17,2
8, 40
12,13,
33, 34
—
These pins are not internally connected. These pins should
be left unconnected.
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.