PIC18F6390 Datasheet, PDF (251/412 Pages) Microchip Technology – 64/80-Pin Flash Microcontrollers with LCD Driver and nanoWatt Technology

PIC18F6390/6490/8390/8490
FIGURE 20-2:
VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE
PIC18FXXXX
CVREF
Module
R⁽¹⁾
Voltage RF5
Reference
Output
Impedance
+
–
CVREF Output
Note 1: R is dependent upon the voltage reference configuration bits, CVRCON<3:0> and CVRCON<5>.
TABLE 20-1: REGISTERS ASSOCIATED WITH THE 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 CVREN CVROE CVRR CVRSS CVR3 CVR2 CVR1 CVR0
61
CMCON
C2OUT C1OUT C2INV C1INV
CIS
CM2
CM1
CM0
61
TRISF
PORTF Data Direction Register
62
Legend: Shaded cells are not used with the comparator voltage reference.
 2004 Microchip Technology Inc.
Preliminary
DS39629B-page 249