Datasheet

Section 5 Interrupt Controller
Rev. 3.00 Sep. 28, 2009 Page 123 of 910
REJ09B0350-0300
Program execution state
Interrupt generated?
NMI
An interrupt with interrupt
control level 1?
IRQ0
IRQ1
IBFI3
IRQ0
IRQ1
IBFI3
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 5.9 Flowchart of Procedure up to Interrupt Acceptance in Interrupt Control Mode 1