dspic33fj128gp204 Microchip Technology Inc., dspic33fj128gp204 Datasheet - Page 272

• Manufacturer Part Number: dspic33fj128gp204
• Description: High-performance, 16-bit Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

23.1
23.1.1
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
(CVR3:CVR0), with one range offering finer resolution.
FIGURE 23-2:
DS70292C-page 270
V
AV
REF
selected
DD
Comparator Voltage Reference
CVREN
+
CVRR
V
AV
CONFIGURING THE COMPARATOR
VOLTAGE REFERENCE
REF
SS
-
by
CVRSS = 1
CVRSS = 0
COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
the
CV
REF
CVRSS = 1
CVRSS = 0
16 Steps
Selection
CV
8R
R
R
R
R
R
R
R
RSRC
Preliminary
bits
8R
The comparator reference supply voltage can come
from either V
V
bit (CVRCON<4>).
The settling time of the comparator voltage reference
must be considered when changing the CV
output.
REF
CVRCON<3:0>
-. The voltage source is selected by the CVRSS
DD
CVRCON<CVROE>
and V
SS
© 2009 Microchip Technology Inc.
, or the external V
CV
CV
REFIN
REF
REF
+ and
REF