PIC16CR74ESLASHSP datasheet(87/172 Pages) MICROCHIP

87 / 172 page

DS21993C-page 85

PIC16CR7X

The following steps should be followed for doing an

A/D conversion:

Configure the A/D module:

• Configure analog pins, voltage reference and

digital I/O (ADCON1)

• Select A/D conversion clock (ADCON0)

• Turn on A/D module (ADCON0)

Configure the A/D interrupt (if desired):

• Clear ADIF bit

• Set ADIE bit

• Set PEIE bit

• Set GIE bit

Select an A/D input channel (ADCON0).

Wait for at least an appropriate acquisition

period.

Start conversion:

• Set GO/DONE bit (ADCON0)

Wait for the A/D conversion to complete, by

either:

• Polling for the GO/DONE bit to be cleared

(interrupts disabled)

• Waiting for the A/D interrupt

Read A/D Result register (ADRES) and clear bit

ADIF if required.

For next conversion, go to step 3 or step 4, as

required.

FIGURE 11-1:

A/D BLOCK DIAGRAM

(Input Voltage)

VIN

VREF

(Reference

Voltage)

VDD

PCFG2:PCFG0

CHS2:CHS0

000

010

100

001

011

101

RE2/AN7(1)

RE1/AN6(1)

RE0/AN5(1)

RA5/AN4

RA3/AN3/VREF

RA2/AN2

RA1/AN1

RA0/AN0

111

110

101

100

011

010

001

000

A/D

Converter

Note

1: Not available on PIC16CR73/76.

11x

PIC16CR74E/SP Datasheet(PDF) 87 Page - Microchip Technology

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