Putting Interrupt Requests On Hold - NEC mPD789426 Series User Manual

14.4.4 Putting interrupt requests on hold

If an interrupt request (such as a maskable, non-maskable, or external interrupt) is generated when a certain type
of instruction is being executed, the interrupt request will not be acknowledged until the instruction is completed.
Such instructions (interrupt request pending instructions) are as follows.
• Instructions that manipulate interrupt request flag registers 0, 1 (IF0 and IF1)
• Instructions that manipulate interrupt mask flag registers 0, 1 (MK0 and MK1)
CHAPTER 14 INTERRUPT FUNCTIONS
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