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PIC24F16KA102 FAMILY

24.0 COMPARATOR VOLTAGE

REFERENCE

24.1 Configuring the Comparator

Voltage Reference

The comparator voltage reference module is controlled

through the CVRCON register (Register 24-1). 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 CV

REF Selection bits

(CVR<3:0>), with one range offering finer resolution.

The comparator reference supply voltage can come

from either V

DD and VSS, or the external VREF+ and

REF-. 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 CV

REF output.

FIGURE 24-1: COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM

Note: This data sheet summarizes the features

of this group of PIC24F devices. It is not

intended to be a comprehensive

reference source. For more information

on the Comparator Voltage Reference,

refer to the “PIC24F Family Reference

Manual”, Section 20. “Comparator

Voltage Reference Module”

(DS39709).

16-to-1 MUX

CVR<3:0>

CVREN

CVRSS = 0

VREF+

CVRSS = 1

CVRSS = 0

REF-

CVRSS = 1

16 Steps

CVRR

CVREF

AVSS

1 2 ... 180 181 182 183 184 185 186 187 188 189 190 ... 253 254

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