Datasheet

PIC18F2331/2431/4331/4431
DS39616D-page 22  2010 Microchip Technology Inc.
PORTC is a bidirectional I/O port.
RC0/T1OSO/T1CKI
RC0
T1OSO
T1CKI
15 32 34
I/O
O
I
ST
—
ST
Digital I/O.
Timer1 oscillator output.
Timer1 external clock input.
RC1/T1OSI/CCP2/
FLTA
RC1
T1OSI
CCP2
FLTA
16 35 35
I/O
I
I/O
I
ST
CMOS
ST
ST
Digital I/O.
Timer1 oscillator input.
Capture 2 input, Compare 2 output, PWM2 output.
Fault interrupt input pin.
RC2/CCP1/FLTB
RC2
CCP1
FLTB
17 36 36
I/O
I/O
I
ST
ST
ST
Digital I/O.
Capture 1 input/Compare 1 output/PWM1 output.
Fault interrupt input pin.
RC3/T0CKI/T5CKI/
INT0
RC3
T0CKI
(1)
T5CKI
(1)
INT0
18 37 37
I/O
I
I
I
ST
ST
ST
ST
Digital I/O.
Timer0 alternate clock input.
Timer5 alternate clock input.
External Interrupt 0.
RC4/INT1/SDI/SDA
RC4
INT1
SDI
(1)
SDA
(1)
23 42 42
I/O
I
I
I/O
ST
ST
ST
I
2
C
Digital I/O.
External Interrupt 1.
SPI data in.
I
2
C™ data I/O.
RC5/INT2/SCK/SCL
RC5
INT2
SCK
(1)
SCL
(1)
24 43 43
I/O
I
I/O
I/O
ST
ST
ST
I
2
C
Digital I/O.
External Interrupt 2.
Synchronous serial clock input/output for SPI mode.
Synchronous serial clock input/output for I
2
C mode.
RC6/TX/CK/SS
RC6
TX
CK
SS
25 44 44
I/O
O
I/O
I
ST
—
ST
ST
Digital I/O.
EUSART asynchronous transmit.
EUSART synchronous clock (see related RX/DT).
SPI slave select input.
RC7/RX/DT/SDO
RC7
RX
DT
SDO
(1)
26 1 1
I/O
I
I/O
O
ST
ST
ST
—
Digital I/O.
EUSART asynchronous receive.
EUSART synchronous data (see related TX/CK).
SPI data out.
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.