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PIC24F16KA102 FAMILY

21.0 HIGH/LOW-VOLTAGE DETECT

(HLVD)

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 21-1)

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 21-1: HIGH/LOW-VOLTAGE DETECT (HLVD) MODULE BLOCK DIAGRAM

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).

Set

VDD

16-to-1 MUX

HLVDEN

HLVDL<3:0>

HLVDIN

Externally Generated

Trip Point

HLVDIF

HLVDEN

Internal Voltage

Reference

VDIR

1.2V Typical

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