| 摘要 |
PURPOSE: The system bus structure using the USB(Universal Serial Bus) is provided to supply broader bandwidth and reduce cost by not using an additional hardware. CONSTITUTION: A host, first hub(230), is connected to main controllers(203-1,203-2) of the top. The first hub is connected with the second hub(231), a few switching parts(240), and subscriber lines(250). The second hub is connected with the third hub(232), other subscriber lines(260) and systems(270). Also, the third hub is connected with another subscriber lines(280) and systems(290). In other word, each USB connector which is embedded in the controller, switching parts and subscriber lines is connected to the hub for USB bus. The switching parts and subscriber lines linked by each hub are connected as tree structure. So, there is no additional hardware because only the hub is needed for implementing the system bus using the USB.
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