Datasheet

Section 5 Interrupt Controller
Rev. 4.00 Jun 06, 2006 page 128 of 1004
REJ09B0301-0400
Program execution state
Interrupt generated?
NMI?
Control level 1
interrupt?
IRQ0?
IRQ1?
IICI1?
IRQ0?
IRQ1?
IICI1?
UI = 0?
Save PC and CCR
I ← 1, UI ← 1
Read vector address
Branch to interrupt handling routine
Yes
No
Yes
Yes
Yes
No
No
Yes
No
Yes No
Yes
Yes
No
No
Yes
Yes
No
Hold pending
I = 0? I = 0?
Yes
Yes
No
No
Figure 5.10 Flowchart of Procedure Up to Interrupt Acceptance in
Interrupt Control Mode 1