PIC16F87XA
FIGURE 13-1:
COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
VDD
16 Stages
CVREN
R
R
R
R
8R
8R
CVRR
RA2/AN2/VREF-/CVREF
CVROE
CVR3
CVREF
Input to
Comparator
CVR2
CVR1
CVR0
16:1 Analog MUX
TABLE 13-1: REGISTERS ASSOCIATED WITH COMPARATOR VOLTAGE REFERENCE
Value On
All Other
RESETS
Value On
POR
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
9Dh
9Ch
CVRCON CVREN CVROE CVRR
CMCON
—
CVR3
CIS
CVR2
CM2
CVR1
CM1
CVR0
CM0
000- 0000 000- 0000
0000 0111 0000 0111
C2OUT C1OUT C2INV C1INV
Legend: x= unknown, u= unchanged, - = unimplemented, read as “0”.
Shaded cells are not used with the comparator voltage reference.
DS39582A-page 140
AdvanceInformation
2001 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
