PIC18F258 Datasheet, PDF (255/384 Pages) Microchip Technology – High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN

PIC18FXX8
FIGURE 22-2:
VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE
CVREF
Module
R⁽¹⁾ RA0/AN0
•
Voltage
Reference
Output
Impedance
+
–
•
CVREF Output
Note 1: R is dependent upon the voltage reference configuration 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
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.
 2002 Microchip Technology Inc.
Preliminary
DS41159B-page 253