PIC18FXX20
FIGURE 21-2:
VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE
(1)
RF5
R
CVREF
Module
+
–
CVREF Output
Voltage
Reference
Output
Impedance
Note 1: R is dependent upon the Voltage Reference Configuration bits CVRCON<3:0> and CVRCON<5>.
TABLE 21-1: REGISTERS ASSOCIATED WITH COMPARATOR VOLTAGE REFERENCE
Value on
Value on
all other
RESETS
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
POR
CVRCON CVREN CVROE CVRR CVRSS CVR3
CVR2
CM2
CVR1
CM1
CVR0 0000 0000 0000 0000
CM0 0000 0000 0000 0000
CMCON
TRISF
C2OUT C1OUT C2INV C1INV
TRISF7 TRISF6 TRISF5 TRISF4 TRISF3 TRISF2 TRISF1 TRISF0 1111 1111 1111 1111
CIS
Legend: x= unknown, u= unchanged, - = unimplemented, read as ‘0’.
Shaded cells are not used with the comparator voltage reference.
2003 Microchip Technology Inc.
Advance Information
DS39609A-page 231
MICROCHIP [ MICROCHIP ]
