
2006 Microchip Technology Inc.
DS41159E-page 13
PIC18FXX8
PORTC is a bidirectional I/O port.
RC0/T1OSO/T1CKI
RC0
T1OSO
T1CKI
11
15
32
16
I/O
O
I
ST
—
ST
Digital I/O.
Timer1 oscillator output.
Timer1/Timer3 external clock
input.
RC1/T1OSI
RC1
T1OSI
12
16
35
18
I/O
I
ST
CMOS
Digital I/O.
Timer1 oscillator input.
RC2/CCP1
RC2
CCP1
13
17
36
19
I/O
ST
Digital I/O.
Capture 1 input/Compare 1
output/PWM1 output.
RC3/SCK/SCL
RC3
SCK
SCL
14
18
37
20
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
15
23
42
25
I/O
I
I/O
ST
Digital I/O.
SPI data in.
I2C data I/O.
RC5/SDO
RC5
SDO
16
24
43
26
I/O
O
ST
—
Digital I/O.
SPI data out.
RC6/TX/CK
RC6
TX
CK
17
25
44
27
I/O
O
I/O
ST
—
ST
Digital I/O.
USART asynchronous
transmit.
USART synchronous clock
(see RX/DT).
RC7/RX/DT
RC7
RX
DT
18
26
1
29
I/O
I
I/O
ST
Digital I/O.
USART asynchronous receive.
USART synchronous data
(see TX/CK).
TABLE 1-2:
PIC18FXX8 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type
Buffer
Type
Description
PIC18F248/258
PIC18F448/458
SPDIP, SOIC
PDIP
TQFP
PLCC
Legend: TTL = TTL compatible input
CMOS = CMOS compatible input or output
ST
= Schmitt Trigger input with CMOS levels
Analog = Analog input
I
= Input
O
= Output
P
= Power
OD
= Open-Drain (no P diode to VDD)