PIC18F4580ISOSQTP 查看數據表（PDF） - Microchip Technology

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PIC18F4580ISOSQTP

28/40/44-Pin Enhanced Flash Microcontrollers with ECAN™ Technology, 10-Bit A/D and nanoWatt Technology

Microchip Technology 

PIC18F2480/2580/4480/4580

FIGURE 22-2:

COMPARATOR VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE

PIC18F4X80

CVREF

Module

R(1)

Voltage

Reference

Output

Impedance

RA0

+

–

CVREF Output

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

TABLE 22-1: REGISTERS ASSOCIATED WITH COMPARATOR VOLTAGE REFERENCE

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

57

CMCON(2) C2OUT C1OUT C2INV C1INV

CIS

CM2

CM1

CM0

57

TRISA

TRISA7(1) TRISA6(1) PORTA Data Direction Register

58

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 PIC18F2X80 devices.

© 2009 Microchip Technology Inc.

DS39637D-page 271

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