Datasheet

 2015 Microchip Technology Inc. Preliminary DS60001320B-page 573
PIC32MZ Embedded Connectivity with Floating Point Unit (EF) Family
32.0 COMPARATOR VOLTAGE
REFERENCE (CVREF)
The CVREF module is a 16-tap, resistor ladder network
that provides a selectable reference voltage. Although
its primary purpose is to provide a reference for the
analog comparators, it also may be used independently
of them.
The resistor ladder is segmented to provide two ranges
of voltage reference values and has a power-down
function to conserve power when the reference is not
being used. The module’s supply reference can be pro
-
vided from either device VDD/VSS or an external
voltage reference. The CV
REF output is available for
the comparators and typically available for pin output.
The comparator voltage reference has the following
features:
• High and low range selection
• Sixteen output levels available for each range
• Internally connected to comparators to conserve
device pins
• Output can be connected to a pin
A block diagram of the CVREF module is illustrated in
Figure 32-1.
FIGURE 32-1: COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
Note: This data sheet summarizes the
features of the PIC32MZ EF family of
devices. It is not intended to be a
comprehensive reference source. To
complement the information in this data
sheet, refer to Section 20. “Comparator
Voltage Reference (CV
REF)”
(DS60001109) in the “PIC32 Family
Reference Manual”, which is available
from the Microchip web site
(
www.microchip.com/PIC32).
16-to-1 MUX
CVR<3:0>
8R
R
CVREN
CVRSS = 0
AV
DD
VREF+
CVRSS = 1
8R
CVRSS = 0
V
REF-
CVRSS = 1
R
R
R
R
R
R
16 Steps
CVRR
CVREFOUT
AVSS
CVRCON<CVROE>
CV
REF
CVRSRC