PIC32MX3XX/4XX
23.0
COMPARATOR
The PIC32MX3XX/4XX Analog Comparator module
contains one or more comparator(s) that can be
Note 1: This data sheet summarizes the features
of the PIC32MX3XX/4XX family of
devices. It is not intended to be a compre-
hensive reference source. Refer to Sec-
tion 19. “Comparator” (DS61110) of
the “PIC32MX Family Reference Man-
ual” , which is available from the Microchip
web site (www.microchip.com/PIC32).
2: Some registers and associated bits
described in this section may not be avail-
able on all devices. Refer to Section 4.0
sheet for device-specific register and bit
information.
configured in a variety of ways.
Following are some of the key features of this module:
? Selectable inputs available include:
- Analog inputs multiplexed with I/O pins
- On-chip internal absolute voltage reference
(IV REF )
- Comparator voltage reference (CV REF )
? Outputs can be inverted
? Selectable interrupt generation
A block diagram of the comparator module is illustrated
FIGURE 23-1:
COMPARATOR BLOCK DIAGRAM
Comparator 1
C1IN+ (1)
CREF
ON
CPOL
COUT (CM1CON)
C1OUT (CMSTAT)
CV REF (2)
C1IN-
C1IN+
CCH<1:0>
C1
COE
C1OUT
C2IN+
IV REF (2)
Comparator 2
C2IN+
CREF
ON
CPOL
COUT (CM2CON)
C2OUT (CMSTAT)
CV REF (2)
C2IN-
C2IN+
C1IN+
IV REF (2)
CCH<1:0>
C2
COE
C2OUT
Note 1:
2:
On USB variants, when USB is enabled, this pin is controlled by the USB module and therefore
is not available as a comparator input.
Internally connected.
? 2010 Microchip Technology Inc.
DS61143G-page 125
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