Microchip Technology DM164134 データシート

DS41159E-page 257

PIC18FXX8

FIGURE 22-2:

VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE

TABLE 22-1:

REGISTERS ASSOCIATED WITH COMPARATOR VOLTAGE REFERENCE

REF

Output

+
–

•

REF

Module

Voltage

Reference

Output

Impedance

(1)

RA0/AN0

Note 1: R is dependent upon the voltage reference configuration CVRCON<3:0> and CVRCON<5>.

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on

POR

Value on

all other

Resets

CVRCON

CVREN CVROE

CVRR

CVRSS

CVR3

CVR2

CVR1

CVR0

0000 0000 0000 0000

CMCON

C2OUT

C1OUT

C2INV

C1INV

CIS

CM2

CM1

CM0

0000 0000 0000 0000

TRISA

—

TRISA6 TRISA5 TRISA4 TRISA3

TRISA2

TRISA1 TRISA0 -111 1111 -111 1111

Legend: x = unknown, u = unchanged, - = unimplemented, read as ‘0’.

Shaded cells are not used with the comparator voltage reference.