Figure 20.23 Sample Flowchart For Awake - Renesas HD6417641 Hardware Manual

Section 20 USB Function Module
Normal routine IRQ1interrupt routine IRQ0 interrupt routine
Normal state
or standby mode
Yes
No
IRQ0 interrupt?
Clear IRR0/IRQ0R of INTC
Set SR/I[3:0] to the IRQ0
priority
1
IRR0/IRQ1R of INTC?
0
Clear USBIFR2/SUSPS
Clear IRR0/IRQ1R of INTC
and AWAKE
Clear USBIFR2/SUSPS
RTE instruction
and AWAKE
Restore SSR
and SPC
from memory
RTE instruction RTE instruction
Normal operation

Figure 20.23 Sample Flowchart for AWAKE

Rev. 4.00 Sep. 14, 2005 Page 793 of 982
REJ09B0023-0400