Hitachi F-ZTAT H8/3039 Series Hardware Manual page 111

Yes
Priority level 1?
Yes
No
IRQ
0
Yes
IRQ
1
Yes
Figure 5-4 Process Up to Interrupt Acceptance when UE = 1
Program execution state
Interrupt requested?
Yes
NMI
No
No
IRQ
Yes
No
ADI
Yes
I = 0
Yes
Save PC and CCR
←
I 1
Read vector address
Branch to interrupt
service routine
No
No
0
No
IRQ
1
Yes
ADI
No
Pending
Yes
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