Figure 5.6 Process Up To Interrupt Acceptance When Ue = 0 - Hitachi H8/3062 Hardware Manual

Yes
Priority level 1?
Yes
No
IRQ
0
Yes
IRQ
1
Yes
I = 0
Yes
Yes

Figure 5.6 Process Up to Interrupt Acceptance when UE = 0

Program execution state
Interrupt requested?
Yes
NMI
No
No
IRQ
0
Yes
No
TEI1
Yes
No
UI = 0
Save PC and CCR
← ←
I 1, UI 1
Read vector address
Branch to interrupt
service routine
No
Pending
No
No
IRQ
1
Yes
TEI1
Yes
No
I = 0
Yes
No
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