Datasheet

 2009 Microchip Technology Inc. DS39897C-page 277
PIC24FJ256GB110 FAMILY
23.0 TRIPLE COMPARATOR
MODULE
The triple comparator module provides three dual input
comparators. The inputs to the comparator can be con-
figured 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 two (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 in shown in
Figure 23-1. Diagrams of the possible individual
comparator configurations are shown in Figure 23-2.
Each comparator has its own control register,
CMxCON (Register 23-1), for enabling and configuring
its operation. The output and event status of all three
comparators is provided in the CMSTAT register
(Register 23-2).
FIGURE 23-1: TRIPLE COMPARATOR MODULE BLOCK DIAGRAM
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, refer to the
associated “PIC24F Family Reference
Manual” chapter.
C1
V
IN-
V
IN+
CXINB
C
XINC
C
XINA
C
XIND
CV
REF
VBG/2
C2
V
IN-
V
IN+
C3
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
COE
C3OUT
Pin
CPOL
Trigger/Interrupt
Logic
CEVT
EVPOL<1:0>
COUT