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64GA106 датащи(PDF) 239 Page - Microchip Technology

номер детали 64GA106
подробное описание детали  64/80/100-Pin, 16-Bit, General Purpose Flash Microcontrollers
PDF  330 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

64GA106 датащи(HTML) 239 Page - Microchip Technology

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 2010 Microchip Technology Inc.
DS39905E-page 239
PIC24FJ256GA110 FAMILY
23.0
COMPARATOR VOLTAGE
REFERENCE
23.1
Configuring the Comparator
Voltage Reference
The voltage reference module is controlled through the
CVRCON register (Register 23-1). 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
CVREF
Selection
bits
(CVR<3:0>), 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 23-1:
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, refer to the
“PIC24F
Family
Reference
Manual”
,
Section
20.
“Comparator
Voltage
Reference Module”
(DS39709).
CVR<3:0>
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
AVSS



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