PIC32MX440F256H-80I Datasheet, PDF (539/646 Pages) Microchip Technology – 64/100-Pin General Purpose and USB 32-Bit Flash Microcontrollers

PIC32MX3XX/4XX
24.0 COMPARATOR
Note:
This data sheet summarizes the features of
the PIC32MX3XX/4XX family of devices. It
is not intended to be a comprehensive refer-
ence source. Refer to the “PIC32MX Family
Reference Manual” (DS61132) for a
detailed description of this peripheral.
The PIC32MX3XX/4XX Analog Comparator module
contains one or more comparator(s) that can be config-
ured 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
(IVREF)
- Comparator voltage reference (CVREF)
• Outputs can be inverted
• Selectable interrupt generation
A block diagram of the comparator module is shown in
Figure 24-1.
FIGURE 24-1:
COMPARATOR BLOCK DIAGRAM
C1IN+⁽²⁾
CVREF⁽³⁾
C1IN-
C1IN+
C2IN+
IVREF⁽³⁾
CREF
CCH<1:0>
Comparator 1
ON
CPOL
C1
COUT (CM1CON)
C1OUT (CMSTAT)
C1OUT
COE
C2IN+
CVREF⁽³⁾
C2IN-
C2IN+
C1IN+
IVREF⁽³⁾
CREF
CCH<1:0>
Comparator 2
ON
CPOL
C2
COUT (CM2CON)
C2OUT (CMSTAT)
C2OUT
COE
Note 1:
2:
3:
IVref is the internal 1.2V reference.
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.
© 2008 Microchip Technology Inc.
Preliminary
DS61143E-page 537