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3.1.1.5.1IDLE Mode
IDLE mode is the mode the endpoint 0 control must select at
Figure 6. IDLE Mode Flow Chart
IDLE mode
RxPktRdy
set?
Yes
Unload FIFO
Decode command
Command has data phase
?
No
No
Return
Process command
Yes
Set
ServiceRxPktRdy
Set ServicedRxPktRdy
Set DataEnd
Data
phase = IN
?
No
State −> RX
Yes
Return
State −> TX
Return
Return
Universal Serial Bus (USB) Controller | 33 |