PIC18F2450/4450
TABLE 9-5:
PORTC I/O SUMMARY
TRIS
Setting
Pin
Function
I/O
I/O Type
Description
RC0/T1OSO/
T1CKI
RC0
0
1
x
OUT
IN
DIG
ST
LATC<0> data output.
PORTC<0> data input.
T1OSO
OUT
ANA
Timer1 oscillator output; enabled when Timer1 oscillator enabled.
Disables digital I/O.
T1CKI
RC1
1
0
1
x
IN
OUT
IN
ST
DIG
ST
Timer1 counter input.
LATC<1> data output.
PORTC<1> data input.
RC1/T1OSI/
UOE
T1OSI
IN
ANA
Timer1 oscillator input; enabled when Timer1 oscillator enabled.
Disables digital I/O.
UOE
RC2
0
0
1
0
1
OUT
OUT
IN
DIG
DIG
ST
External USB transceiver OE output.
LATC<2> data output.
RC2/CCP1
RC4/D-/VM
PORTC<2> data input.
CCP1
OUT
IN
DIG
ST
CCP1 Compare and PWM output; takes priority over port data.
CCP1 Capture input.
(1)
RC4
D-
—
IN
TTL
PORTC<4> data input; disabled when USB module or on-chip
transceiver is enabled.
(1)
—
OUT
IN
XCVR USB bus differential minus line output (internal transceiver).
XCVR USB bus differential minus line input (internal transceiver).
(1)
—
(1)
VM
—
IN
TTL
TTL
External USB transceiver VM input.
(1)
RC5/D+/VP
RC6/TX/CK
RC5
—
IN
PORTC<5> data input; disabled when USB module or on-chip
transceiver is enabled.
(1)
D+
—
OUT
IN
XCVR USB bus differential plus line output (internal transceiver).
XCVR USB bus differential plus line input (internal transceiver).
1)
—
1)
VP
—
IN
TTL
DIG
ST
External USB transceiver VP input.
LATC<6> data output.
RC6
0
1
0
OUT
IN
PORTC<6> data input.
TX
CK
OUT
DIG
Asynchronous serial transmit data output (EUSART module); takes
priority over port data. User must configure as output.
0
OUT
DIG
Synchronous serial clock output (EUSART module); takes priority
over port data.
1
0
1
1
1
1
IN
OUT
IN
ST
DIG
ST
Synchronous serial clock input (EUSART module).
LATC<7> data output.
RC7/RX/DT
RC7
PORTC<7> data input.
RX
DT
IN
ST
Asynchronous serial receive data input (EUSART module).
Synchronous serial data output (EUSART module).
OUT
IN
DIG
ST
Synchronous serial data input (EUSART module). User must
configure as an input.
Legend:
OUT = Output, IN = Input, ANA = Analog Signal, DIG = Digital Output, ST = Schmitt Buffer Input,
TTL = TTL Buffer Input, XCVR = USB Transceiver, x= Don’t care (TRIS bit does not affect port direction or is
overridden for this option)
Note 1: RC4 and RC5 do not have corresponding TRISC bits. In Port mode, these pins are input only. USB data direction is
determined by the USB configuration.
© 2006 Microchip Technology Inc.
Advance Information
DS39760A-page 105
MICROCHIP [ MICROCHIP ]
