PIC16F882/883/884/886/887
FIGURE 8-8:
COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
16 Stages
VREF+
VRSS = 1
8R
R
R
R
R
VRSS = 0
VRR
8R
VDD
Analog
MUX
VREF-
VRSS = 1
VRSS = 0
15
0
CVREF
To Comparators
and ADC Module
(1)
VR<3:0>
VROE
4
VREN
C1RSEL
C2RSEL
CVREF
FVREN
Sleep
HFINTOSC enable
EN
FixedRef
0.6V
Fixed Voltage
Reference
To Comparators
and ADC Module
Note 1: Care should be taken when using VREF- with Comparator.
FIGURE 8-9:
COMPARATOR AND ADC VOLTAGE REFERENCE BLOCK DIAGRAM
VREF+
1
0
1
0
AVDD
AVDD
VCFG0
VRSS
CVREF
Comparator
ADC
Voltage
Reference
Voltage
Reference
VROE
VCFG1
VRSS
AVSS
0
1
0
AVSS
VCFG1
1
VREF-
© 2007 Microchip Technology Inc.
Preliminary
DS41291D-page 95