Download SH7760 Group USB Host Module Application Note

Reset state
Initial setting
completed
Connection-wait sate
RootHubStatusChange
intgerrupt generated
Connection
Root Hub
processing state
Connection
processing state
Disconnection
Disconnection
processing state
RootHubStatusChange
interrupt generated
Steady state
OverCurrent
processing state
Transfer-result
processing state
WriteBackDoneHead
interrupt generated
Serial output state
Main loop
Done Queue
processing state
USB host interrupt priority: 15
Serial-receive-interrupt generated
Serial communications state
Serial input state
Transfer-request
generation state
UART interrupt priority: 12 (IRL)
Figure 4.1 State-Transition Diagram
Rev. 1.00, 10/03, page 71 of 90