| 摘要 |
<p>A device and a method for performing data transfer over a bus. In one embodiment the device comprises a request line adapted for initiating a standard data transfer mode. In turn, the request line is used to send a standard data transfer request to an arbiter. The same request line is further adapted for initiating a special data transfer mode. In turn, the same request line is used to send a special data transfer request to the arbiter. The device also includes a grant line adapted for receiving a grant signal from said arbiter. The same grant line is also adapted for receiving a special grant signal from the arbiter. As such, the present invention provides a bus protocol to that provides different levels of bus requestpriority from the device to the arbiter, while not needing any extra pin. The standard data transfer typically indicates asynchronous transfer, whereas the special data transfer typically indicates isochronous data transfer.</p> |
