Datasheet

PIC18F2682/2685/4682/4685
DS39761C-page 138 © 2009 Microchip Technology Inc.
TABLE 10-5: PORTC I/O SUMMARY
Pin Name Function I/O TRIS Buffer Description
RC0/T1OSO/
T13CKI
RC0 OUT 0 DIG LATC<0> data output.
IN 1 ST PORTC<0> data input.
T1OSO OUT x ANA Timer1 oscillator output – overrides the TRIS<0> control when enabled.
T13CKI IN 1 ST Timer1/Timer3 clock input.
RC1/T1OSI RC1 OUT 0 DIG LATC<1> data output.
IN 1 ST PORTC<1> data input.
T1OSI IN x ANA Timer1 oscillator input – overrides the TRIS<1> control when enabled.
RC2/CCP1 RC2 OUT 0 DIG LATC<2> data output.
IN 1 ST PORTC<2> data input.
CCP1 OUT 0 DIG CCP1 compare output.
IN 1 ST CCP1 capture input.
RC3/SCK/SCL RC3 OUT 0 DIG LATC<3> data output.
IN 1 ST PORTC<3> data input.
SCK OUT 0 DIG SPI clock output (MSSP module) – must have TRIS set to ‘1’ to allow the
MSSP module to control the bidirectional communication.
IN 1 ST SPI clock input (MSSP module).
SCL OUT 0 DIG I
2
C™/SMBus clock output (MSSP module) – must have TRIS set to ‘1’ to
allow the MSSP module to control the bidirectional communication.
IN 1 I
2
C/SMB I
2
C/SMBus clock input.
RC4/SDI/SDA RC4 OUT 0 DIG LATC<4> data output.
IN 1 ST PORTC<4> data input.
SDI IN 1 ST SPI data input (MSSP module).
SDA OUT 1 DIG I
2
C/SMBus data output (MSSP module) – must have TRIS set to ‘1’ to
allow the MSSP module to control the bidirectional communication.
IN 1 I
2
C/SMB I
2
C/SMBus data input (MSSP module) – must have TRIS set to ‘1’ to allow
the MSSP module to control the bidirectional communication.
RC5/SDO RC5 OUT 0 DIG LATC<5> data output.
IN 1 ST PORTC<5> data input.
SDO OUT 0 DIG SPI data output (MSSP module).
RC6/TX/CK RC6 OUT 0 DIG LATC<6> data output.
IN 1 ST PORTC<6> data input.
TX OUT 0 DIG EUSART data output.
CK OUT 1 DIG EUSART synchronous clock output – must have TRIS set to ‘1’ to enable
EUSART to control the bidirectional communication.
IN 1 ST EUSART synchronous clock input.
RC7/RX/DT RC7 OUT 0 DIG LATC<7> data output.
IN 1 ST PORTC<7> data input.
RX IN 1 ST EUSART asynchronous data input.
DT OUT 1 DIG EUSART synchronous data output – must have TRIS set to ‘1’ to enable
EUSART to control the bidirectional communication.
IN 1 ST EUSART synchronous data input.
Legend: OUT = Output; IN = Input; ANA = Analog Signal; DIG = Digital Output; ST = Schmitt Buffer Input;
TTL = TTL Buffer Input; I
2
C = Inter-Integrated Circuit; SMBus = System Management Bus