PIC16F7X
TABLE 1-2:
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
RD1/PSP1
RD2/PSP2
RD3/PSP3
RD4/PSP4
RD5/PSP5
RD6/PSP6
RD7/PSP7
19
20
21
22
27
28
29
30
21
22
23
24
30
31
32
33
38
39
40
41
2
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
(3)
(3)
(3)
(3)
(3)
(3)
(3)
3
4
5
PORTE is a bi-directional I/O port.
(3)
(3)
(3)
RE0/RD/AN5
RE1/WR/AN6
RE2/CS/AN7
8
9
9
25
26
27
I/O
I/O
I/O
RE0 can also be read control for the parallel slave port, or
analog input5.
ST/TTL
ST/TTL
ST/TTL
10
11
RE1 can also be write control for the parallel slave port, or
analog input6.
10
RE2 can also be select control for the parallel slave port,
or analog input7.
VSS
VDD
NC
12,31
11,32
—
13,34
12,35
6,29
7,28
P
P
—
—
—
Ground reference for logic and I/O pins.
Positive supply for logic and I/O pins.
1,17,28, 12,13,
40 33,34
These pins are not internally connected. These pins should be
left unconnected.
Legend: I = input
O = output
— = Not used
I/O = input/output
TTL = TTL input
P = power
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.
2000 Microchip Technology Inc.
Advance Information
DS30325A-page 9
MICROCHIP [ MICROCHIP ]
