Datasheet

 2009-2011 Microchip Technology Inc. DS39960D-page 377

PIC18F87K22 FAMILY

FIGURE 25-2: COMPARATOR VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE

TABLE 25-1: REGISTERS ASSOCIATED WITH COMPARATOR VOLTAGE REFERENCE

Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

CVRCON CVREN CVROE CVRSS CVR4 CVR3 CVR2 CVR1 CVR0

CM1CON

CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0

CM2CON

CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0

CM3CON

CON COE CPOL EVPOL1 EVPOL0 CREF CCH1 CCH0

TRISF

TRISF7 TRISF6 TRISF5 TRISF4 TRISF3 TRISF2 TRISF1 —

TRISA

TRISA7 TRISA6 TRISA5 TRISA4 TRISA3 TRISA2 TRISA1 TRISA0

ANCON0

ANSEL7 ANSEL6 ANSEL5 ANSEL4 ANSEL3 ANSEL2 ANSEL1 ANSEL0

ANCON1

ANSEL15 ANSEL14 ANSEL13 ANSEL12 ANSEL11 ANSEL10 ANSEL9 ANSEL8

Legend: — = unimplemented, read as ‘0’. Shaded cells are not used with the comparator voltage reference.

CVREF Output

–

CVREF

Module

Voltage

Reference

Output

Impedance

(1)

PIC18F87K22

Note 1: R is dependent upon the Voltage Reference Configuration bits, CVRCON<3:0> and CVRCON<5>.

RF5