PIC16F676-ESLASHST datasheet(28/132 Pages) MICROCHIP

28 / 132 page

PIC16F630/676

DS40039F-page 28

 2010 Microchip Technology Inc.

3.3

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. For specific

information about individual functions such as the

comparator or the A/D, refer to the appropriate section

in this Data Sheet.

EXAMPLE 3-2:

INITIALIZING PORTC

3.3.1

RC0/AN4, RC1/AN5, RC2/AN6, RC3/

AN7

The RC0/RC1/RC2/RC3 pins are configurable to

function as one of the following:

• a general purpose I/O

• an analog input for the A/D Converter

(PIC16F676 only)

FIGURE 3-6:

BLOCK DIAGRAM OF

RC0/RC1/RC2/RC3 PINs

3.3.2

RC4 AND RC5

The RC4 and RC5 pins are configurable to function as

a general purpose I/Os.

FIGURE 3-7:

BLOCK DIAGRAM OF RC4

AND RC5 PINS

Note:

The ANSEL register (91h) must be clear to

configure an analog channel as a digital

input. Pins configured as analog inputs will

read ‘0’. The ANSEL register is defined for

the PIC16F676.

BCF

STATUS,RP0

;Bank 0

CLRF

PORTC

;Init PORTC

BSF

STATUS,RP0

;Bank 1

CLRF

ANSEL

;digital I/O

MOVLW

0Ch

;Set RC<3:2> as inputs

MOVWF

TRISC

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

;as outputs

BCF

STATUS,RP0

;Bank 0

I/O Pin

VDD

VSS

Data bus

PORTC

TRISC

To A/D Converter

PORTC

Analog Input

Mode

I/O Pin

VDD

VSS

Data bus

PORTC

TRISC

PORTC

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