PIC18F2221 MICROCHIP [Microchip Technology], PIC18F2221 Datasheet - Page 247

• Manufacturer Part Number: PIC18F2221
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 21-2:
TABLE 21-1:
© 2007 Microchip Technology Inc.
CVRCON
CMCON
TRISA
Legend: Shaded cells are not used with the comparator voltage reference.
Note 1:
Name
Note 1:
PORTA pins are enabled based on oscillator configuration.
TRISA7
CVREN
C2OUT
Bit 7
REGISTERS ASSOCIATED WITH COMPARATOR VOLTAGE REFERENCE
R is dependent upon the voltage reference configuration bits, CVRCON<3:0> and CVRCON<5>.
CV
Module
COMPARATOR VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE
(1)
REF
PIC18FXXXX
TRISA6
CVROE
C1OUT
Bit 6
Impedance
Reference
Voltage
Output
R
(1)
(1)
PORTA Data Direction Control Register
CVRR
C2INV
Bit 5
RA2
CVRSS
C1INV
Preliminary
Bit 4
CVR3
Bit 3
CIS
PIC18F4321 FAMILY
+
–
CVR2
Bit 2
CM2
CVR1
Bit 1
CM1
CV
REF
Output
CVR0
Bit 0
CM0
DS39689E-page 245
on page
Values
Reset
51
51
52