
PIC18CXX2
DS39026C-page 16
 2001 Microchip Technology Inc.
PORTD is a bi-directional I/O port, or a Parallel Slave Port
(PSP) for interfacing to a microprocessor port. These pins
have TTL input buffers when PSP module is enabled.
RD0/PSP0
19
21
38
I/O
ST
TTL
Digital I/O.
Parallel Slave Port Data.
RD1/PSP1
20
22
39
I/O
ST
TTL
Digital I/O.
Parallel Slave Port Data.
RD2/PSP2
21
23
40
I/O
ST
TTL
Digital I/O.
Parallel Slave Port Data.
RD3/PSP3
22
24
41
I/O
ST
TTL
Digital I/O.
Parallel Slave Port Data.
RD4/PSP4
27
30
2
I/O
ST
TTL
Digital I/O.
Parallel Slave Port Data.
RD5/PSP5
28
31
3
I/O
ST
TTL
Digital I/O.
Parallel Slave Port Data.
RD6/PSP6
29
32
4
I/O
ST
TTL
Digital I/O.
Parallel Slave Port Data.
RD7/PSP7
30
33
5
I/O
ST
TTL
Digital I/O.
Parallel Slave Port Data.
PORTE is a bi-directional I/O port.
RE0/RD/AN5
RE0
RD
AN5
89
25
I/O
ST
TTL
Analog
Digital I/O.
Read control for parallel slave port (see also WR
and CS pins).
Analog input 5.
RE1/WR/AN6
RE1
WR
AN6
910
26
I/O
ST
TTL
Analog
Digital I/O.
Write control for parallel slave port (see CS
and RD pins).
Analog input 6.
RE2/CS/AN7
RE2
CS
AN7
10
11
27
I/O
ST
TTL
Analog
Digital I/O.
Chip Select control for parallel slave port (see related
RD and WR).
Analog input 7.
VSS
12, 31 13, 34
6, 29
P
—
Ground reference for logic and I/O pins.
VDD
11, 32 12, 35
7, 28
P
—
Positive supply for logic and I/O pins.
TABLE 1-3:
PIC18C4X2 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type
Buffer
Type
Description
DIP
PLCC TQFP
Legend:
TTL = TTL compatible input
CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels I = Input
O = Output
P = Power
OD = Open Drain (no P diode to VDD)