PIC16F871 Microchip Technology Inc., PIC16F871 Datasheet - Page 11

• Manufacturer Part Number: PIC16F871
• Description: 28/40-pin, 8-bit Cmos Flash Microcontrollers
• Manufacturer: Microchip Technology Inc.

TABLE 1-2:
 2003 Microchip Technology Inc.
RD0/PSP0
RD1/PSP1
RD2/PSP2
RD3/PSP3
RD4/PSP4
RD5/PSP5
RD6/PSP6
RD7/PSP7
RE0/RD/AN5
RE1/WR/AN6
RE2/CS/AN7
V
V
NC
Legend:
Note 1:
SS
DD
Pin Name
2:
3:
4:
I = input
— = Not used
This buffer is a Schmitt Trigger input when configured as an external interrupt or LVP mode.
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.
PIC16F871 PINOUT DESCRIPTION (CONTINUED)
12,31
11,32
Pin#
DIP
19
20
21
22
27
28
29
30
10
—
8
9
1,17,28,
PLCC
13,34
12,35
Pin#
21
22
23
24
30
31
32
33
10
40
11
O = output
TTL = TTL input
9
12,13,
33,34
QFP
Pin#
6,29
7,28
38
39
40
41
25
26
27
2
3
4
5
I/O/P
Type
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
P
P
I/O = input/output
ST = Schmitt Trigger input
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
ST/TTL
Buffer
Type
—
—
—
(3)
(3)
(3)
(3)
(3)
(3)
(3)
(3)
(3)
(3)
(3)
PORTD is a bi-directional I/O port or parallel slave port when
interfacing to a microprocessor bus.
PORTE is a bi-directional I/O port.
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 can also be read control for the parallel slave port, or
analog input 5.
RE1 can also be write control for the parallel slave port, or
analog input 6.
RE2 can also be select control for the parallel slave port,
or analog input 7.
P = power
PIC16F870/871
Description
DS30569B-page 9