PIC16F87XA Datasheet, PDF (15/234 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers

PIC16F87XA
TABLE 1-3: PIC16F874A/877A PINOUT DESCRIPTION (CONTINUED)
Pin Name
PDIP PLCC TQFP QFN I/O/P
Pin# Pin# Pin# Pin# Type
Buffer
Type
Description
RD0/PSP0
RD0
PSP0
RD1/PSP1
RD1
PSP1
RD2/PSP2
RD2
PSP2
RD3/PSP3
RD3
PSP3
RD4/PSP4
RD4
PSP4
RD5/PSP5
RD5
PSP5
RD6/PSP6
RD6
PSP6
RD7/PSP7
RD7
PSP7
PORTD is a bidirectional I/O port or Parallel Slave
Port when interfacing to a microprocessor bus.
19
21
38
38
ST/TTL⁽³⁾
I/O
Digital I/O.
I/O
Parallel Slave Port data.
20
22
39
39
ST/TTL⁽³⁾
I/O
Digital I/O.
I/O
Parallel Slave Port data.
21
23
40
40
ST/TTL⁽³⁾
I/O
Digital I/O.
I/O
Parallel Slave Port data.
22
24
41
41
ST/TTL⁽³⁾
I/O
Digital I/O.
I/O
Parallel Slave Port data.
27 30
2
2
ST/TTL⁽³⁾
I/O
Digital I/O.
I/O
Parallel Slave Port data.
28 31
3
3
ST/TTL⁽³⁾
I/O
Digital I/O.
I/O
Parallel Slave Port data.
29 32
4
4
ST/TTL⁽³⁾
I/O
Digital I/O.
I/O
Parallel Slave Port data.
30 33
5
5
ST/TTL⁽³⁾
I/O
Digital I/O.
I/O
Parallel Slave Port data.
RE0/RD/AN5
RE0
RD
AN5
RE1/WR/AN6
RE1
WR
AN6
RE2/CS/AN7
RE2
CS
AN7
PORTE is a bidirectional I/O port.
8
9
25
25
ST/TTL⁽³⁾
I/O
Digital I/O.
I
Read control for Parallel Slave Port.
I
Analog input 5.
9
10 26
26
ST/TTL⁽³⁾
I/O
Digital I/O.
I
Write control for Parallel Slave Port.
I
Analog input 6.
10
11
27
27
ST/TTL⁽³⁾
I/O
Digital I/O.
I
Chip select control for Parallel Slave Port.
I
Analog input 7.
VSS
12, 31 13, 34 6, 29 6, 30, P
—
Ground reference for logic and I/O pins.
31
VDD
11, 32 12, 35 7, 28 7, 8,
P
—
Positive supply for logic and I/O pins.
28, 29
NC
— 1, 17, 12,13, 13
—
—
These pins are not internally connected. These pins
28, 40 33, 34
should be left unconnected.
Legend:
Note 1:
2:
3:
I = input
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 the external interrupt.
This buffer is a Schmitt Trigger input when used in Serial Programming mode.
This buffer is a Schmitt Trigger input when configured in RC Oscillator mode and a CMOS input otherwise.
 2003 Microchip Technology Inc.
DS39582B-page 13