DSPIC33FJ64GP802-H/SP View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
DSPIC33FJ64GP802-H/SP Datasheet PDF : 402 Pages
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dsPIC33FJ32GP302/304, dsPIC33FJ64GPX02/X04, AND dsPIC33FJ128GPX02/X04
23.1 Comparator Voltage Reference
23.1.1 CONFIGURING THE COMPARATOR
VOLTAGE REFERENCE
The voltage reference module is controlled through the
CVRCON register (Register 23-2). 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 23-2:
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
DS70292D-page 274
Preliminary
2009 Microchip Technology Inc.
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