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Program execution state
IRRI0 = 1
Yes
IEN0 = 1
Yes
I = 0
Yes
PC contents saved
CCR contents saved
I ← 1
Branch to interrupt
handling routine
[Legend]
PC:
Program counter
CCR:
Condition code register
I:
I bit of CCR
Figure 3.3 Flow up to Interrupt Acceptance
No
No
No
IRRI1 = 1
Yes
No
IEN1 = 1
Yes
IRREC2 = 1
IENEC2 = 1
No
No
Yes
No
Yes
IRRDT = 1
Yes
IENDT = 1
Yes
Rev. 6.00, 08/04, page 91 of 628
No
No
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