Renesas H8S Family Hardware Manual page 145

An interrupt with interrupt
control level 1?
IRQ0
Yes
Figure 5.6 Flowchart of Procedure Up to Interrupt Acceptance in Interrupt
Program execution state
Interrupt generated?
Yes
Yes
NMI
No
No
Yes
No
No
IRQ1
Yes
EINT
Yes
No
I = 0
Yes
UI = 0
Yes
Save PC and CCR
I 1, UI
Read vector address
Branch to interrupt handling routine
Control Mode 1
Section 5 Interrupt Controller
No
No
IRQ0
Yes No
IRQ1
Yes
EINT
Yes
I = 0
Yes
No
1
Rev. 1.00 Mar. 12, 2008 Page 97 of 1178
Pending
No
REJ09B0403-0100