
PIC18F2XK20/4XK20
DS41303G-page 24
2010 Microchip Technology Inc.
PORTD is a bidirectional 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
RD0
PSP0
19
38
I/O
ST
TTL
Digital I/O
Parallel Slave Port data
RD1/PSP1
RD1
PSP1
20
39
I/O
ST
TTL
Digital I/O
Parallel Slave Port data
RD2/PSP2
RD2
PSP2
21
40
I/O
ST
TTL
Digital I/O
Parallel Slave Port data
RD3/PSP3
RD3
PSP3
22
41
I/O
ST
TTL
Digital I/O
Parallel Slave Port data
RD4/PSP4
RD4
PSP4
27
2
I/O
ST
TTL
Digital I/O
Parallel Slave Port data
RD5/PSP5/P1B
RD5
PSP5
P1B
28
3
I/O
O
ST
TTL
—
Digital I/O
Parallel Slave Port data
Enhanced CCP1 output
RD6/PSP6/P1C
RD6
PSP6
P1C
29
4
I/O
O
ST
TTL
—
Digital I/O
Parallel Slave Port data
Enhanced CCP1 output
RD7/PSP7/P1D
RD7
PSP7
P1D
30
5
I/O
O
ST
TTL
—
Digital I/O
Parallel Slave Port data
Enhanced CCP1 output
TABLE 1-3:
PIC18F4XK20 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type
Buffer
Type
Description
PDIP
QFN
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
Note 1: Default assignment for CCP2 when Configuration bit CCP2MX is set.
2: Alternate assignment for CCP2 when Configuration bit CCP2MX is cleared.