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CHAPTER 5 INTERRUPT/EXCEPTION PROCESSING FUNCTION
(a) If a new NMI request is generated while an NMI service routine is executing:
Main routine
NMI request →
(b) If a new NMI request is generated twice while an NMI service routine is executing:
Main routine
NMI request →
104
Figure 5-2. Accepting Non-Maskable Interrupt Request
(PSW. NP = 1)
NMI request →
NMI request pending because PSW. NP = 1
Pending NMI request processed
NMI request → Kept pending because NMI service program is being processed
NMI request →
Kept pending because NMI service program is being processed
Only one NMI request is accepted even though
two or more NMI requests are generated
User's Manual U11969EJ3V0UM00
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