PIC24F04KA201 Datasheet, PDF (155/224 Pages) Microchip Technology – 14/20-Pin General Purpose, 16-Bit Flash Microcontrollers with nanoWatt XLP™ Technology

PIC24F04KA201 FAMILY
20.0 COMPARATOR MODULE
Note:
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on the
Comparator module, refer to the “PIC24F
Family Reference Manual”, Section 19.
“Comparator Module” (DS39710).
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 (VBG/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
Figure 20-1. Diagrams of the possible individual
comparator configurations are displayed in
Figure 20-2.
Each comparator has its own control register,
CMxCON (Register 20-1), for enabling and configuring
its operation. The output and event status of all three
comparators is provided in the CMSTAT register
(Register 20-2).
FIGURE 20-1:
CCH<1:0>
CREF
CXINB
VBG/2
COMPARATOR MODULE BLOCK DIAGRAM
Input
Select
Logic
VIN-
VIN+ ^C1
EVPOL<1:0>
CPOL
Trigger/Interrupt
Logic
CEVT
COE
C1OUT
COUT
Pin
CXINA
CVREF
VIN-
VIN+ ^C2
EVPOL<1:0>
CPOL
Trigger/Interrupt
Logic
CEVT
COE
C2OUT
COUT ^Pin
© 2009 Microchip Technology Inc.
Preliminary
DS39937B-page 153