Datasheet

PIC18F2585/2680/4585/4680

FIGURE 21-2: VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE

TABLE 21-1: REGISTERS ASSOCIATED WITH COMPARATOR VOLTAGE REFERENCE

CVREF Output

–

CVREF

Module

Voltage

Reference

Output

Impedance

(1)

RA0

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

PIC18F4X8X

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

Reset

Values

on page

CVRCON

(2)

CVREN CVROE CVRR CVRSS CVR3 CVR2 CVR1 CVR0 51

CMCON

(2)

C2OUT C1OUT C2INV C1INV CIS CM2 CM1 CM0 51

TRISA TRISA7

(1)

TRISA6

(1)

PORTA Data Direction Register 52

Legend: Shaded cells are not used with the comparator voltage reference.

Note 1: PORTA pins are enabled based on oscillator configuration.

2: These registers are unimplemented on PIC18F2X8X devices.