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PIC24FJ128GA310 bảng dữ liệu(PDF) 321 Page - Microchip Technology

tên linh kiện PIC24FJ128GA310
Giải thích chi tiết về linh kiện  64/80/100-Pin, General Purpose, 16-Bit Flash Microcontrollers with LCD Controller and nanoWatt XLP Technology
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nhà sản xuất  MICROCHIP [Microchip Technology]
Trang chủ  http://www.microchip.com
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 2010-2011 Microchip Technology Inc.
DS39996F-page 321
PIC24FJ128GA310 FAMILY
26.0
COMPARATOR VOLTAGE
REFERENCE
26.1
Configuring the Comparator
Voltage Reference
The voltage reference module is controlled through the
CVRCON register (Register 26-1). 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 26-1:
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 19. “Dual Comparator Module”
(DS39710). The information in this data
sheet supersedes the information in the
FRM.
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
CVROE
CVREF
Pin



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