PIC16F882 Datasheet, PDF (97/288 Pages) Microchip Technology – 28/40/44-Pin, Enhanced Flash-Based 8-Bit CMOS Microcontrollers with nanoWatt Technology

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