PIC18F25J11-I/PT MICROCHIP [Microchip Technology], PIC18F25J11-I/PT Datasheet - Page 363

• Manufacturer Part Number: PIC18F25J11-I/PT
• Description: 28/44-Pin, Low-Power, High-Performance Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

22.0
The comparator voltage reference is a 16-tap resistor
ladder network that provides a selectable reference
voltage. Although its primary purpose is to provide a
reference for the analog comparators, it may also be
used independently of them.
FIGURE 22-1:
© 2009 Microchip Technology Inc.
COMPARATOR VOLTAGE
REFERENCE MODULE
CVRR
V
V
CVREN
V
REF
REF
DD
COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
+
-
CVRSS = 0
CVRSS = 1
CVRSS = 1
CVRSS = 0
16 Steps
8R
R
R
R
R
R
R
R
PIC18F46J11 FAMILY
Figure 22-1 provides a block diagram of the module.
The resistor ladder is segmented to provide two ranges
of CV
conserve power when the reference is not being used.
The module’s supply reference can be provided from
either device V
8R
REF
values and has a power-down function to
CVR<3:0>
DD
/V
SS
or an external voltage reference.
CV
REF
DS39932C-page 363