Renesas M16C/50 Series User Manual page 247

M16C/5L Group, M16C/56 Group
13.5 Interrupts
The watchdog timer interrupt is a non-maskable interrupt.
The watchdog timer interrupt, oscillator stop/restart detect interrupt, and voltage monitor 2 interrupt share
an vector. When using multiple functions, read the detect flag in an interrupt handler to determine which
interrupt factor generates an interrupt request.
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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.
R01UH0127EJ0110 Rev.1.10
Sep 01, 2011
13. Watchdog Timer
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