SH79F6489PSLASH080PR datasheet(124/152 Pages) SINOWEALTH

Part #	SH79F6489P/080PR

Description	Enhanced 8051 Microcontroller with 20bit Σ-ΔADC and LCD Driver

PDF	152 Pages

Scroll/Zoom	100%

Manufacturer	SINOWEALTH [SINOWEALTH Electronic Ltd]

Direct Link	https://en.sinowealth.com

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124 / 152 page

SH79F6488/SH79F6489

124

8.10 Low Voltage Reset (LVR)

8.10.1 Features

 Enabled by the code option and VLVR is 3.1V or 4.0V

 LVR de-bounce timer TLVR is about 60µs

 An internal reset flag indicates low voltage reset generates

The LVR function is used to monitor the supply voltage and generate an internal reset in the device when the supply voltage

below the specified value VLVR. The LVR de-bounce timer TLVR is about 60µs.

The LVR circuit has the following functions when the LVR function is enabled: (T1 means the time of the supply voltage below

VLVR)

Generates a system reset when VDD ≤ VLVR and T1 ≥ TLVR;

Cancels the system reset when VDD > VLVR or VDD < VLVR, but T1 < TLVR.

VDD

VLVR

TLVR

LVR Reset

The LVR function is enabled by the code option.

It is typically used in AC line or large battery supplier applications, where heavy loads may be switched on and cause the MCU

supply-voltage temporarily falls below the minimum specified operating voltage. This feature can protect system from working

under bad power supply environment.

SH79F6489P/080PR Datasheet(PDF) 124 Page - SINOWEALTH Electronic Ltd