PIC16C63A-04I/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16C63A-04I/SO

8-Bit CMOS Microcontrollers with A/D Converter

Microchip Technology 

PIC16C63A/65B/73B/74B

The following steps should be followed for doing an A/D

conversion:

1. Configure the A/D module:

• Configure analog pins, voltage reference,

and digital I/O (ADCON1)

• Select A/D input channel (ADCON0)

• Select A/D conversion clock (ADCON0)

• Turn on A/D module (ADCON0)

2. Configure A/D interrupt (if desired):

• Clear ADIF bit (PIR1<6>)

• Set ADIE bit (PIE1<6>)

• Set PEIE bit (INTCON<6>)

• Set GIE bit (INTCON<7>)

3. Wait the required acquisition time.

4. Set GO/DONE bit (ADCON0) to start conversion.

5. Wait for A/D conversion to complete, by either:

Polling for the GO/DONE bit to be cleared (if

interrupts are disabled);

OR

Waiting for the A/D interrupt.

6. Read A/D result register (ADRES), clear bit

ADIF if required.

7. For next conversion, go to step 1 or step 2 as

required. The A/D conversion time per bit is

defined as TAD. A minimum wait of 2 TAD is

required before next acquisition starts.

FIGURE 12-1:

A/D BLOCK DIAGRAM

CHS2:CHS0

111

RE2/AN7(1)

110

RE1/AN6(1)

101

RE0/AN5(1)

VIN

(Input Voltage)

100

RA5/AN4

011

RA3/AN3/VREF

A/D

Converter

010

RA2/AN2

001

RA1/AN1

VREF

VDD

000

RA0/AN0

000 or

010 or

100 or

11x

(Reference

Voltage)

001 or

011 or

101

PCFG2:PCFG0

Note 1: Not available on PIC16C73B.

 2000 Microchip Technology Inc.

DS30605C-page 81

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