PIC24FV32KA304-I Datasheet, PDF (229/320 Pages) Microchip Technology – 20/28/44/48-Pin, General Purpose, 16-Bit Flash Microcontrollers with XLP Technology

PIC24FV32KA304 FAMILY
24.0 COMPARATOR VOLTAGE
REFERENCE
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 Module
Voltage Reference Module” (DS39709).
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 a range of
output voltages, with 32 distinct levels.
The comparator voltage 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<5>).
The settling time of the comparator voltage reference
must be considered when changing the CVREF output.
FIGURE 24-1:
COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
VREF+
CVRSS = 1
AVDD
CVRSS = 0
8R
CVREN
R
R
R
R
32 Steps
CVR<3:0>
CVREF
R
R
R
VREF-
8R
CVRSS = 1
CVRSS = 0
AVSS
 2011 Microchip Technology Inc.
DS39995B-page 229