
2001 Microchip Technology Inc.
DS39026C-page 15
PIC18CXX2
PORTC is a bi-directional I/O port.
RC0/T1OSO/T1CKI
RC0
T1OSO
T1CKI
15
16
32
I/O
O
I
ST
—
ST
Digital I/O.
Timer1 oscillator output.
Timer1/Timer3 external clock input.
RC1/T1OSI/CCP2
RC1
T1OSI
CCP2
16
18
35
I/O
I
I/O
ST
CMOS
ST
Digital I/O.
Timer1 oscillator input.
Capture2 input, Compare2 output, PWM2 output.
RC2/CCP1
RC2
CCP1
17
19
36
I/O
ST
Digital I/O.
Capture1 input/Compare1 output/PWM1 output.
RC3/SCK/SCL
RC3
SCK
SCL
18
20
37
I/O
ST
Digital I/O.
Synchronous serial clock input/output for
SPI mode.
Synchronous serial clock input/output for
I2C mode.
RC4/SDI/SDA
RC4
SDI
SDA
23
25
42
I/O
I
I/O
ST
Digital I/O.
SPI Data In.
I2C Data I/O.
RC5/SDO
RC5
SDO
24
26
43
I/O
O
ST
—
Digital I/O.
SPI Data Out.
RC6/TX/CK
RC6
TX
CK
25
27
44
I/O
O
I/O
ST
—
ST
Digital I/O.
USART Asynchronous Transmit.
USART Synchronous Clock (see related RX/DT).
RC7/RX/DT
RC7
RX
DT
26
29
1
I/O
I
I/O
ST
Digital I/O.
USART Asynchronous Receive.
USART Synchronous Data (see related TX/CK).
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)