Rev. 1.0, 02/00, page 117 of 1141
Program execution state
NMI
I C
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
No
No
No
No
No
I C
No
No
H S W 1
H S W 1
H S W 2
H S W 2
Yes
No
Yes
No
Interrupt
generated?
Address trap
interrupt?
Control level 1
interrupt?
I = 0
I = 0
UI = 0
Save PC and CCR
I
←
1, UI
←
1
Read vector address
Branch to interrupt handling routine
Hold pending
Figure 6.7 Flowchart of Procedure Up to Interrupt Acceptance in
Interrupt Control Mode 1