Datasheet

 2010 Microchip Technology Inc. DS39616D-page 23
PIC18F2331/2431/4331/4431
PORTD is a bidirectional I/O port.
RD0/T0CKI/T5CKI
RD0
T0CKI
T5CKI
19 38 38
I/O
I
I
ST
ST
ST
Digital I/O.
Timer0 external clock input.
Timer5 input clock.
RD1/SDO
RD1
SDO
(1)
20 39 39
I/O
O
ST
—
Digital I/O.
SPI data out.
RD2/SDI/SDA
RD2
SDI
(1)
SDA
(1)
21 40 40
I/O
I
I/O
ST
ST
ST
Digital I/O.
SPI data in.
I
2
C™ data I/O.
RD3/SCK/SCL
RD3
SCK
(1)
SCL
(1)
22 41 41
I/O
I/O
I/O
ST
ST
ST
Digital I/O.
Synchronous serial clock input/output for SPI mode.
Synchronous serial clock input/output for I
2
C mode.
RD4/FLTA
RD4
FLTA
(2)
27 2 2
I/O
I
ST
ST
Digital I/O.
Fault interrupt input pin.
RD5/PWM4
RD5
PWM4
(3)
28 3 3
I/O
O
ST
TTL
Digital I/O.
PWM Output 4.
RD6/PWM6
RD6
PWM6
29 4 4
I/O
O
ST
TTL
Digital I/O.
PWM Output 6.
RD7/PWM7
RD7
PWM7
30 5 5
I/O
O
ST
TTL
Digital I/O.
PWM Output 7.
TABLE 1-3: PIC18F4331/4431 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type
Buffer
Type
Description
PDIP TQFP QFN
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: RC3 is the alternate pin for T0CKI/T5CKI; RC4 is the alternate pin for SDI/SDA; RC5 is the alternate pin
for SCK/SCL; RC7 is the alternate pin for SDO.
2: RD4 is the alternate pin for FLTA
.
3: RD5 is the alternate pin for PWM4.