HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 84

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

Notes: 1. When disabling interrupts by clearing bits in an interrupt enable register, or when
74
The I bit of CCR is set to 1, masking further interrupts.
The vector address corresponding to the accepted interrupt is generated, and the interrupt
handling routine located at the address indicated by the contents of the vector address is
executed.
2. If the above clear operations are performed while I = 0, and as a result a conflict arises
clearing bits in an interrupt request register, always do so while interrupts are masked
(I = 1).
between the clear instruction and an interrupt request, exception processing for the
interrupt will be executed after the clear instruction has been executed.