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DSPIC33FJ32GP302TH/SP Datasheet(PDF) 274 Page - Microchip Technology

Part # DSPIC33FJ32GP302TH/SP
Description  High-Performance, 16-bit Digital Signal Controllers
PDF  403 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

DSPIC33FJ32GP302TH/SP Datasheet(HTML) 274 Page - Microchip Technology

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dsPIC33FJ32GP302/304, dsPIC33FJ64GPX02/X04, AND dsPIC33FJ128GPX02/X04
DS70292D-page 274
Preliminary
 2009 Microchip Technology Inc.
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
8R
R
CVREN
CVRSS = 0
AVDD
VREF+
CVRSS = 1
8R
CVRSS = 0
VREF-
CVRSS = 1
R
R
R
R
R
R
16 Steps
CVRR
CVREF
CVRCON<3:0>
AVSS
CVRSRC
CVRCON<CVROE>
CVREFIN



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