64GA106 datasheet(235/330 Pages) MICROCHIP

235 / 330 page

 2010 Microchip Technology Inc.

DS39905E-page 235

PIC24FJ256GA110 FAMILY

22.0

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 (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 in shown in

Figure 22-1. Diagrams of the possible individual

comparator configurations are shown in Figure 22-2.

Each comparator has its own control register,

CMxCON (Register 22-1), for enabling and configuring

its operation. The output and event status of all three

comparators are provided in the CMSTAT register

(Register 22-2).

FIGURE 22-1:

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

“PIC24F

Family

Reference

Manual”

Section

19.

“Comparator

Module”

(DS39710).

VIN-

VIN+

CXINB

CXINC

CXINA

CXIND

CVREF

VBG/2

VIN-

VIN+

VIN-

VIN+

COE

C1OUT

CPOL

Trigger/Interrupt

Logic

CEVT

EVPOL<1:0>

COUT

Input

Select

Logic

CCH<1:0>

CREF

COE

C2OUT

CPOL

Trigger/Interrupt

Logic

CEVT

EVPOL<1:0>

COUT

COE

C3OUT

CPOL

Trigger/Interrupt

Logic

CEVT

EVPOL<1:0>

COUT

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