NEC 78K0 User Manual page 374

(2) When used as interrupt
Check that "supply voltage (V
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
flag, and then enable interrupts (EI).
374
CHAPTER 21 LOW-VOLTAGE DETECTOR
) > detection voltage (V
DD LVI
User's Manual U16227EJ2V0UD
)" in the servicing routine of the LVI interrupt by using bit
) > detection voltage (V
DD
)" using the LVIF
LVI