Datasheet

© 2007 Microchip Technology Inc. DS41250F-page 119
PIC16F913/914/916/917/946
FIGURE 8-8: COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
TABLE 8-2: SUMMARY OF REGISTERS ASSOCIATED WITH THE COMPARATOR AND VOLTAGE
REFERENCE MODULES
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR, BOR
Value on
all other
Resets
ANSEL
ANS7 ANS6 ANS5 ANS4 ANS3 ANS2 ANS1 ANS0 1111 1111 1111 1111
CMCON0 C2OUT C1OUT C2INV C1INV CIS CM2 CM1 CM0 0000 0000 0000 0000
CMCON1
— — — — — — T1GSS C2SYNC ---- --10 ---- --10
INTCON GIE PEIE
T0IE INTE RBIE T0IF INTF RBIF 0000 000x 0000 000x
PIE2
OSFIE C2IE C1IE LCDIE — LVDIE — CCP2IE
0000 -0-0 0000 -0-0
PIR2
OSFIF C2IF C1IF LCDIF — LVDIF — CCP2IF
0000 -0-0 0000 -0-0
PORTA
RA7 RA6 RA5 RA4 RA3 RA2 RA1 RA0 xxxx xxxx uuuu uuuu
TRISA
TRISA7 TRISA6 TRISA5 TRISA4 TRISA3 TRISA2 TRISA1 TRISA0 1111 1111 1111 1111
VRCON VREN
—VRR— VR3 VR2 VR1 VR0 0-0- 0000 0000 0000
Legend: x = unknown, u = unchanged, - = unimplemented, read as ‘0’. Shaded cells are not used for comparator.
VRR
8R
VR<3:0>
(1)
16-1 Analog
8RRR RR
CVREF to
16 Stages
Comparator
Input
VREN
VDD
MUX
VR<3:0> = 0000
VREN
VRR
0
1
2
14
15
Note 1: Care should be taken to ensure VREF remains
within the comparator common mode input range.
See Section 19.0 “Electrical Specifications”
for more detail.