PIC24F04KA201 Datasheet, PDF (143/224 Pages) Microchip Technology – 14/20-Pin General Purpose, 16-Bit Flash Microcontrollers with nanoWatt XLP™ Technology

PIC24F04KA201 FAMILY
18.0 HIGH/LOW-VOLTAGE DETECT
(HLVD)
Note:
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on the
High/Low-Voltage Detect, refer to the
“PIC24F Family Reference Manual”,
Section 36. “High-Level Integration
with Programmable High/Low-Voltage
Detect (HLVD)” (DS39725).
The High/Low-Voltage Detect module (HLVD) is a
programmable circuit that allows the user to specify
both the device voltage trip point and the direction of
change.
An interrupt flag is set if the device experiences an
excursion past the trip point in the direction of change.
If the interrupt is enabled, the program execution will
branch to the interrupt vector address and the software
can then respond to the interrupt.
The HLVD Control register (see Register 18-1)
completely controls the operation of the HLVD module.
This allows the circuitry to be “turned off” by the user
under software control, which minimizes the current
consumption for the device.
FIGURE 18-1:
HIGH/LOW-VOLTAGE DETECT (HLVD) MODULE BLOCK DIAGRAM
Externally Generated
Trip Point
VDD
HLVDIN
VDD
HLVDL<3:0>
HLVDEN VDIR
Set
HLVDIF
HLVDEN
Internal Voltage
Reference
1.2V Typical
© 2009 Microchip Technology Inc.
Preliminary
DS39937B-page 141