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IRQ0
Figure 6.9 Flowchart of Procedure up to Interrupt Acceptance in Interrupt Control Mode 1
Program execution state
Interrupt generated?
Yes
An interrupt with interrupt
control level 1?
Yes
No
No
Yes
IRQ1
Yes
IBFI3
Yes
I = 0
Yes
Save PC and CCR
Read vector address
Branch to interrupt handling routine
No
Yes
NMI
No
No
No
IRQ0
Yes
IRQ1
Yes
No
I = 0
Yes
No
UI = 0
Yes
I
1, UI
1
Rev. 1.00 May 09, 2008 Page 137 of 954
Section 6 Interrupt Controller
Hold pending
No
IBFI3
Yes
No
REJ09B0462-0100
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