| 摘要 |
The present invention relates to apparatus and method for arbitrating use authority for system bus in a multi-stage connection; and, more particularly, to a bus arbiter to grant fair use authorities to service objects in consideration with priority orders between many units in a multi-stage connection required in large capacity systems. The cell bus arbiter according to the present invention comprises a filter for receiving a plurality of bus request signals from other cell bus arbiters and outputting unmasked request signals to an external circuit in response to information about bus use records of a specific service object; a selector for selecting one from unmasked request signals based on a priority thereof; a latch circuit for storing the selected signals by the selector; and a flag generator for classifying a service state which is provided for a service object and outputting the mask signal according to the classified service state, wherein the flag generator stops an activation of the mask signal in case where the service is terminated.
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