
 2000 Microchip Technology Inc.
Advanced Information
DS30475A-page 15
PIC18CXX8
PORTC is a bi-directional I/O port
RC0/T1OSO/T13CKI
RC0
T1OSO
T13CKI
30
41
36
49
I/O
O
I
ST
—
ST
Digital I/O
Timer1 oscillator output
Timer1/Timer3 external clock input
RC1/T1OSI
RC1
T1OSI
29
40
35
48
I/O
I
ST
CMOS
Digital I/O
Timer1 oscillator input
RC2/CCP1
RC2
CCP1
33
44
43
56
I/O
ST
Digital I/O
Capture1 input/Compare1
output/PWM1 output
RC3/SCK/SCL
RC3
SCK
SCL
34
45
44
57
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
35
46
45
58
I/O
I
I/O
ST
Digital I/O
SPI data in
I2C data I/O
RC5/SDO
RC5
SDO
36
47
46
59
I/O
O
ST
—
Digital I/O
SPI data out
RC6/TX/CK
RC6
TX
CK
31
42
37
50
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
32
43
38
51
I/O
I
I/O
ST
Digital I/O
USART asynchronous receive
USART synchronous data
(See TX/CK)
TABLE 1-2:
PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type
Buffer
Type
PIC18C658
PIC18C858
TQFP
PLCC
TQFP
PLCC
Description
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)