PIC18F2585_07 Datasheet, PDF (267/482 Pages) Microchip Technology – Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology

PIC18F2585/2680/4585/4680
FIGURE 21-2:
VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE
PIC18F4X8X
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 21-1: REGISTERS ASSOCIATED WITH COMPARATOR VOLTAGE REFERENCE
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CVRCON⁽²⁾
CMCON⁽²⁾
TRISA
CVREN CVROE CVRR CVRSS CVR3
C2OUT C1OUT C2INV C1INV
CIS
TRISA7⁽¹⁾ TRISA6⁽¹⁾ PORTA Data Direction Register
CVR2
CM2
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.
CVR1
CM1
CVR0
CM0
Reset
Values
on page
51
51
52
© 2007 Microchip Technology Inc.
Preliminary
DS39625C-page 265