PICDEM2 datasheet(16/60 Pages) MICROCHIP

16 / 60 page

 2001 Microchip Technology Inc.

DS30374D-page 11

PICDEM 2 USER’S GUIDE

Chapter 4. A/D Demo

The a2d.asm program is a simple implementation of the analog-to-digital

(A/D) converter. The program reads A/D channel 0 and displays the results on

the LEDs connected to PORTB. If the potentiometer is turned all the way

clockwise, all of the LEDs are off. If the potentiometer is turned all the way

counter-clockwise, all of the LEDs are turned on. The program is interrupt

driven, i.e., the program sits in an infinite loop until the A/D converter

interrupts when the conversion is complete and then updates the values on

the PORTB LEDs.

For more information on A/D module operation, please refer to the PICmicro

Mid-range MCUFamily Reference Manual for an operational description and a

list of related application notes. For detailed information on the PICDEM 2

hardware, please refer to Appendix A.

Figure 4.1: A/D Demo

PICDEM 2 DEMO BOARD

PIC16C64/74

RA0

RN1

RN2

PORT B

FFh

00h

POTENTIOMETER

LEDs

PIC16C73

(28-pin Device)

(40-pin Device)

PICDEM2 数据表(PDF) 16 Page - Microchip Technology