Fujitsu FR81S User Manual
CHAPTER 32: LOW-VOLTAGE DETECTION (EXTERNAL
LOW-VOLTAGE DETECTION)
2. Features
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : LOW-VOLTAGE DETECTION (EXTERNAL LOW-VOLTAGE DETECTION)
FUJITSU SEMICONDUCTOR CONFIDENTIAL
4
2. Features
This section explains features of the low-voltage detection (external low-voltage
detection).
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Function : Generates the reset signal to initialize settings if the voltage LVDV ±8% or less is
detected.
(Rising: LVDV: 2.3V (fixed), falling LVDV: 2.8 to 4.3V (variable))
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Number of units : One
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Operation : Switches operation/stop by user’s settings.
During writes to the internal RAM, the low-voltage reset occurs after the write has
finished.
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Voltage comparator :Compares the detection voltage and the power supply voltage, outputting "L" if
low-voltage is detected.
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Either to apply a reset or to generate an interrupt, when a low-voltage is detected, can be selected.
MB91520 Series
MN705-00010-1v0-E
1155