Cautions For Low-Voltage Detector - NEC 78K0S/KA1+ Preliminary User's Manual

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16.5 Cautions for Low-Voltage Detector

In a system where the supply voltage (V
(V ), the operation is as follows depending on how the low-voltage detector is used.
LVI
<1> When used as reset
The system may be repeatedly reset and released from the reset status.
In this case, the time from release of reset to the start of the operation of the microcontroller can be arbitrarily
set by taking action (1) below.
<2> When used as interrupt
Interrupt requests may be frequently generated. Take action (2) below.
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In this system, take the following actions.
<Action>
(1) When used as reset
After releasing the reset signal, wait for the supply voltage fluctuation period of each system by means of a
software counter that uses a timer, and then initialize the ports.
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CHAPTER 16 LOW-VOLTAGE DETECTOR
) fluctuates for a certain period in the vicinity of the LVI detection voltage
DD
Preliminary User's Manual U16898EJ1V0UD