
2002 Microchip Technology Inc.
Preliminary
DS30485A-page 13
PIC18FXX39
PORTC is a bi-directional I/O port.
RC0/T13CKI
RC0
T13CKI
11
I/O
I
ST
Digital I/O.
Timer1/Timer3 external clock input.
RC3/SCK/SCL
RC3
SCK
SCL
14
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
I/O
I
I/O
ST
Digital I/O.
SPI Data in.
I2C Data I/O.
RC5/SDO
RC5
SDO
16
I/O
O
ST
—
Digital I/O.
SPI Data out.
RC6/TX/CK
RC6
TX
CK
17
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
18
I/O
I
I/O
ST
Digital I/O.
USART Asynchronous Receive.
USART Synchronous Data (see related TX/CK).
PWM1
13
O
—
PWM Channel 1 (motor control) output.
PWM2
12
O
—
PWM Channel 2 (motor control) output.
VSS
8, 19 8, 19
P
—
Ground reference for logic and I/O pins.
VDD
20
P
—
Positive supply for logic and I/O pins.
TABLE 1-2:
PIC18F2X39 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type
Buffer
Type
Description
DIP
SOIC
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)