NEC 78K0 User Manual page 491

8-bit single-chip microcontrollers

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CHAPTER 25 LOW-VOLTAGE DETECTOR

(2) When used as interrupt

Check that "supply voltage (V

) > detection voltage (V

)" in the servicing routine of the LVI interrupt by using bit

0 (LVIF) of the low-voltage detection register (LVIM). Clear bit 0 (LVIIF) of interrupt request flag register 0L (IF0L)

to 0 and enable interrupts (EI).

In a system where the supply voltage fluctuation period is long in the vicinity of the LVI detection voltage, wait for

the supply voltage fluctuation period, check that "supply voltage (V

) > detection voltage (V

)" using the LVIF

flag, and then enable interrupts (EI).

User's Manual U15947EJ2V0UD

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