Method of and apparatus for arbitration based on the availability of resources
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United States of America Patent
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-
Aug 24, 1993
Grant Date -
N/A
app pub date -
Dec 30, 1991
filing date -
Dec 30, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for arbitrating among multiple requested data transfers based on the availability of transfer resources. A request for the control of a resource is transmitted to an arbiter with information regarding the size of data transfer, internal buses and external buses required. The arbiter compares the information with the space remaining in the buffer, internal bus availability and external bus availability. If all the resources are available to complete the request, then the request is granted arbitration and the requested transfer is started. If any of the resources is not available, the arbiter takes the next request for evaluation. A mechanism is also provided for each request to require the arbiter to wait until all the resources are available to prevent the arbiter from taking on the next request.
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