
PIC16F87XA
DS39582B-page 142
2003 Microchip Technology Inc.
FIGURE 13-1:
COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
TABLE 13-1:
REGISTERS ASSOCIATED WITH COMPARATOR VOLTAGE REFERENCE
CVRR
8R
CVR3
CVR0
16:1 Analog MUX
8R
R
CVREN
CVREF
16 Stages
Input to
Comparator
CVROE
RA2/AN2/VREF-/CVREF
VDD
CVR2
CVR1
Address
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
9Dh
CVRCON CVREN CVROE CVRR
—
CVR3
CVR2
CVR1
CVR0 000- 0000 000- 0000
9Ch
CMCON
C2OUT C1OUT C2INV C1INV
CIS
CM2
CM1
CM0
0000 0111 0000 0111
Legend: x = unknown, u = unchanged, - = unimplemented, read as ‘0’.
Shaded cells are not used with the comparator voltage reference.