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Section 20 USB Function Module
Rev. 4.00 Sep. 14, 2005 Page 793 of 982
REJ09B0023-0400
Normal routine
IRQ0 interrupt routineIRQ1interrupt routine
Normal state
or standby mode
Clear IRR0/IRQ0R of INTC
Clear IRR0/IRQ1R of INTC
Clear USBIFR2/SUSPS
and AWAKE
Set SR/I[3:0] to the IRQ0
priority
RTE instruction
RTE instruction RTE instruction
Restore SSR
and SPC
from memory
Clear USBIFR2/SUSPS
and AWAKE
IRQ0 interrupt?
IRR0/IRQ1R of INTC?
No
0
1
Yes
Normal operation
Figure 20.23 Sample Flowchart for AWAKE