Datasheet

PIC16F688

4.3 PORTC

PORTC is a general purpose I/O port consisting of 6

bidirectional pins. The pins can be configured for either

digital I/O or analog input to A/D converter or compara-

tor. For specific information about individual functions

such as the EUSART or the A/D converter, refer to the

appropriate section in this data sheet.

EXAMPLE 4-3: INITIALIZING PORTC

Note: The ANSEL and CMCON0 registers must

be initialized to configure an analog

channel as a digital input. Pins configured

as analog inputs will read ‘0’.

BANKSEL PORTC ;

CLRF PORTC ;Init PORTC

MOVLW 07h ;Set RC<4,1:0> to

MOVWF CMCON0 ;digital I/O

BANKSEL ANSEL ;

CLRF ANSEL ;digital I/O

MOVLW 0Ch ;Set RC<3:2> as inputs

MOVWF TRISC ;and set RC<5:4,1:0>

;as outputs

U-0 U-0 R/W-x R/W-x R/W-0 R/W-0 R/W-0 R/W-0

— — RC5 RC4 RC3 RC2 RC1 RC0

bit 7 bit 0

Legend:

R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’

-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown

bit 7-6 Unimplemented: Read as ‘0’

bit 5-0 RC<5:0>: PORTC I/O Pin bit

1 = PORTC pin is > V

0 = PORTC pin is < VIL

U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1

— — TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0

bit 7 bit 0

Legend:

R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’

-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown

bit 7-6 Unimplemented: Read as ‘0’

bit 5-0 TRISC<5:0>: PORTC Tri-State Control bits

1 = PORTC pin configured as an input (tri-stated)

0 = PORTC pin configured as an output