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CHAPTER 22 INTERRUPT FUNCTIONS
User’s Manual U12697EJ3V0UM
Figure 22-10. Non-Maskable Interrupt Request Acknowledgment Operations (1/2)
(a) When a new NMI request is generated during NMI service program execution
Main routine
NMI request
NMI request
(NMIS = 1)
NMI request held pending since NMIS = 1
Pending NMI request is serviced
(b) When a watchdog timer interrupt request is generated during NMI service program execution (when
the watchdog timer interrupt priority is higher (when WDT4 in the WDM = 1))
Main routine
NMI request
Watchdog
timer interrupt
request