| 摘要 |
New approaches for providing communication between multiple masters ( 12, 14 ) and one or more shared resources ( 24, 30, 100 ) are needed. One example of a resource that may need to be shared is circuitry complying with the Universal Serial Bus (USB) standard ( 100 ). The USB specification defines the use of USB endpoints as data and control channels that reside in a USB device. In some cases it is desirable to have a certain number of endpoints controlled by one processor, and other endpoints controlled by a different processor, thus providing a shared control of all the endpoints. Circuitry ( 402, 417, 480 ) may be used to provide steering for additional signals such as interrupts. Other shared resources ( 24, 30 ) may use more centralized circuitry ( 36 ) to perform a steering function for additional signals.
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