Microchip Technology MA240017 Data Sheet

 2008-2011 Microchip Technology Inc.

DS39927C-page 183

The comparator module provides two dual input
comparators. The inputs to the comparator can be
configured to use any one of four external analog
inputs, as well as a voltage reference input from either
the internal band gap reference, divided by 2 (V

BG

/2),

or the comparator voltage reference generator.

The comparator outputs may be directly connected to
the CxOUT pins. When the respective COE equals ‘1’,
the I/O pad logic makes the unsynchronized output of
the comparator available on the pin. 
A simplified block diagram of the module is displayed
in 

. Diagrams of the possible individual

comparator configurations are displayed in

Each comparator has its own control register,
CMxCON (

), for enabling and configuring

its operation. The output and event status of all three
comparators is provided in the CMSTAT register
(

This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive refer-
ence source. For more information on the
Comparator module, refer to the “PIC24F
Family Reference Manual”

,  Section 46.

“Scalable Comparator Module”
(DS39734).

C1

V

IN

-

V

IN

+

C

X

INB

C

X

INC

C

X

INA

C

X

IND

CV

REF

V

BG

/2

C2

V

IN

-

V

IN

+

COE

C1OUT

Pin

CPOL

Trigger/Interrupt

Logic

CEVT

EVPOL<1:0>

COUT

Input

Select

Logic

CCH<1:0>
CREF

COE

C2OUT

Pin

CPOL

Trigger/Interrupt

Logic

CEVT

EVPOL<1:0>

COUT