AN1	Analog input (either to the A/D converter, or to the comparator)
CCP1	Capture1 input / Compare1 output / PWM1 output
CK	USART Synchronous Clock
DT	USART Synchronous Data
INT	External Interrupt Pin
MCLR	Master Clear (Reset)
PGC	Clock line for use when Programming
PGD	Data line for use when Programming
PGM	start Programming (to initiate Low Voltage Programming)
PSP1	Parallel Slave Port
RA0/RB0/RC0/RD0		Bidirectional I/O Port
RX	Receive line for USART
SCK	Synchonous Serial Clock (for SPI)
SCL	I2C clock
SDA	Data I/O (for I2C)
SDI	SPI Data In
SDO	SPI Data Out
SS	Slave Select (for SPI)
T0CKI	Clock Input to Timer0
T1OSI	Timer 1 Oscillator Input
TX	Transmit line for USART
VREF	Voltage Reference