PIC24HJ128GP802-I/ML View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC24HJ128GP802-I/ML

High-Performance, 16-bit Microcontrollers

Microchip Technology 

PIC24HJ32GP302/304, PIC24HJ64GPX02/X04 AND PIC24HJ128GPX02/X04

21.1 Comparator Voltage Reference

21.1.1 CONFIGURING THE COMPARATOR

VOLTAGE REFERENCE

The Voltage Reference module is controlled through

the CVRCON register (Register 21-2). The comparator

voltage reference provides two ranges of output

voltage, each with 16 distinct levels. The range to be

used is selected by the CVRR bit (CVRCON<5>). The

primary difference between the ranges is the size of the

steps selected by the CVREF Selection bits

(CVR3:CVR0), with one range offering finer resolution.

The comparator reference supply voltage can come

from either VDD and VSS, or the external VREF+ and

VREF-. The voltage source is selected by the CVRSS

bit (CVRCON<4>).

The settling time of the comparator voltage reference

must be considered when changing the CVREF

output.

FIGURE 21-2:

COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM

VREF+

AVDD

CVREN

CVRSS = 1

CVRSRC

CVRSS = 0

8R

R

R

R

R

16 Steps

CVRR

VREF-

AVSS

R

R

R

8R

CVRSS = 1

CVRSS = 0

CVRCON<3:0>

CVREFIN

CVRCON<CVROE>

CVREF

DS70293D-page 236

Preliminary

© 2009 Microchip Technology Inc.

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