PIC18F2331/2431/4331/4431
TABLE 1-3:
Pin Name
PIC18F4331/4431 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Number
Pin Buffer
Type Type
Description
PDIP TQFP QFN
PORTC is a bidirectional I/O port.
RC0/T1OSO/T1CKI
RC0
15
16
32
35
34
35
I/O
O
I
ST
—
ST
Digital I/O.
Timer1 oscillator output.
Timer1 external clock input.
T1OSO
T1CKI
RC1/T1OSI/CCP2/
FLTA
RC1
I/O
ST
CMOS
ST
Digital I/O.
Timer1 oscillator input.
Capture 2 input, Compare 2 output, PWM2 output.
Fault interrupt input pin.
T1OSI
CCP2
FLTA
I
I/O
I
ST
RC2/CCP1/FLTB
RC2
17
18
36
37
36
37
I/O
I/O
I
ST
ST
ST
Digital I/O.
CCP1
FLTB
Capture 1 input/Compare 1 output/PWM1 output.
Fault interrupt input pin.
RC3/T0CKI/T5CKI/
INT0
RC3
I/O
ST
ST
ST
ST
Digital I/O.
T0CKI(1)
T5CKI(1)
INT0
I
I
I
Timer0 alternate clock input.
Timer5 alternate clock input.
External Interrupt 0.
RC4/INT1/SDI/SDA
23
24
25
26
42
43
44
1
42
43
44
1
RC4
I/O
I
I
ST
ST
ST
I2C
Digital I/O.
INT1
External Interrupt 1.
SPI data in.
SDI(1)
SDA(1)
I/O
I2C™ data I/O.
RC5/INT2/SCK/SCL
RC5
I/O
I
I/O
I/O
ST
ST
ST
I2C
Digital I/O.
External Interrupt 2.
INT2
SCK(1)
SCL(1)
Synchronous serial clock input/output for SPI mode.
Synchronous serial clock input/output for I2C mode.
RC6/TX/CK/SS
RC6
TX
CK
SS
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
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.
DT
SDO(1)
Legend: TTL = TTL compatible input
ST = Schmitt Trigger input with CMOS levels
= Output
CMOS = CMOS compatible input or output
I
= Input
O
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.
DS39616D-page 22
2010 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
