PIC16F87X
TABLE 1-2:
Pin Name
PIC16F874 AND PIC16F877 PINOUT DESCRIPTION (CONTINUED)
DIP
Pin#
PLCC
Pin#
QFP
Pin#
I/O/P
Type
Buffer
Type
Description
PORTD is a bi-directional I/O port or parallel slave port when
interfacing to a microprocessor bus.
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
3
4
5
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
ST/TTL
(3)
ST/TTL
(3)
ST/TTL
(3)
ST/TTL
(3)
ST/TTL
(3)
ST/TTL
(3)
ST/TTL
(3)
ST/TTL
(3)
PORTE is a bi-directional I/O port.
ST/TTL
(3)
ST/TTL
(3)
ST/TTL
(3)
—
—
—
RE0 can also be read control for the parallel slave port, or
analog input5.
RE1 can also be write control for the parallel slave port, or
analog input6.
RE2 can also be select control for the parallel slave port,
or analog input7.
Ground reference for logic and I/O pins.
Positive supply for logic and I/O pins.
These pins are not internally connected. These pins should be
left unconnected.
RE0/RD/AN5
RE1/WR/AN6
RE2/CS/AN7
V
SS
V
DD
NC
Legend:
Note 1:
2:
3:
4:
I = input
8
9
10
12,31
11,32
—
9
10
11
13,34
12,35
1,17,28,
40
25
26
27
6,29
7,28
12,13,
33,34
I/O
I/O
I/O
P
P
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.
©
1999 Microchip Technology Inc.
DS30292B-page 9
ETC [ ETC ]
