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M16C/64C Group
15.5
Interrupts
Watchdog timer interrupts are non-maskable interrupts.
The watchdog timer interrupt, oscillator stop/restart detect interrupt, voltage monitor 1 interrupt, and
voltage monitor 2 interrupt share an vector. When using multiple functions, read the detect flag in an
interrupt process program to determine the source of the interrupt.
The VW2C3 bit in the VW2C register is the detect flag for the watchdog timer. After the interrupt factor is
determined, set the VW2C3 bit to 0 (not detected) by a program.
R01UH0092EJ0110 Rev.1.10
Jul 31, 2012
15. Watchdog Timer
Page 232 of 807
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