Table of Contents
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Program execution state
Interrupt requested?
Yes
No
Priority level 1?
Yes
No
IRQ
0
Yes
No
IRQ
1
Yes
ADI
Yes
No
I = 0
Yes
Yes
Save PC and CCR
I
Read vector address
Branch to interrupt
service routine
Figure 5-6 Process Up to Interrupt Acceptance when UE = 0
No
Yes
NMI
No
No
IRQ
0
Yes
No
IRQ
1
Yes
ADI
I = 0
Yes
No
UI = 0
←
←
1, UI
1
96
Pending
Yes
No
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