
PIC18F2220/2320/4220/4320
DS39599G-page 108
2007 Microchip Technology Inc.
TABLE 10-5:
PORTC FUNCTIONS
TABLE 10-6:
SUMMARY OF REGISTERS ASSOCIATED WITH PORTC
Name
Bit#
Buffer Type
Function
RC0/T1OSO/T1CKI
bit 0
ST
Input/output port pin or Timer1 oscillator output/Timer1 clock input.
RC1/T1OSI/CCP2
bit 1
ST
Input/output port pin, Timer1 oscillator input or Capture 2 input/
Compare 2 output/PWM output when CCP2MX Configuration bit is
disabled.
RC2/CCP1/P1A(1)
bit 2
ST
Input/output port pin, Capture 1 input/Compare 1 output/PWM1 output
or Enhanced PWM output A(1).
RC3/SCK/SCL
bit 3
ST
RC3 can also be the synchronous serial clock for both SPI and I2C
modes.
RC4/SDI/SDA
bit 4
ST
RC4 can also be the SPI data in (SPI mode) or data I/O (I2C mode).
RC5/SDO
bit 5
ST
Input/output port pin or Master Synchronous Serial Port data output.
RC6/TX/CK
bit 6
ST
Input/output port pin, addressable USART asynchronous transmit or
addressable USART synchronous clock.
RC7/RX/DT
bit 7
ST
Input/output port pin, addressable USART asynchronous receive or
addressable USART synchronous data.
Legend: ST = Schmitt Trigger input
Note 1:
Enhanced PWM output is available only on PIC18F4X20 devices.
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on
all other
Resets
PORTC
RC7
RC6
RC5
RC4
RC3
RC2
RC1
RC0
xxxx xxxx
uuuu uuuu
LATC
LATC Data Latch Register
xxxx xxxx
uuuu uuuu
TRISC
PORTC Data Direction Register
1111 1111
Legend: x = unknown, u = unchanged