16F876 Microchip Technology, 16F876 Datasheet - Page 9

• Manufacturer Part Number: 16F876
• Description: 28/40-pin 8-Bit CMOS FLASH Microcontrollers
• Manufacturer: Microchip Technology

TABLE 1-2:
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: This buffer is a Schmitt Trigger input when configured as an external interrupt.
SS
DD
1999 Microchip Technology Inc.
Pin Name
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
4: This buffer is a Schmitt Trigger input when configured in RC oscillator mode and a CMOS input otherwise.
I = input
Port mode (for interfacing to a microprocessor bus).
PIC16F874 AND PIC16F877 PINOUT DESCRIPTION (CONTINUED)
12,31
11,32
Pin#
— = Not used
DIP
O = output
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
11
40
9
12,13,
33,34
Pin#
QFP
6,29
7,28
38
39
40
41
25
26
27
2
3
4
5
I/O = input/output
TTL = TTL input
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
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)
Description
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.
ST = Schmitt Trigger input
P = power
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.
PIC16F87X
DS30292B-page 9