Bus arbitration system having both round robin and daisy chain arbiters

摘要

A bus arbitration system includes a first priority grant signal determination part for primarily determining a priority grant signal among two groups including a plurality of priority request signals, and a second priority grant signal determination part for finally outputting the priority grant signal among the priority request signals enabled by the first priority grant signal determined from the first priority grant signal determination part. Such a bus arbitration system adopts both the daisy-chain arbitration mode and the round-robin arbitration mode organically. This allows the devices of different characteristics to use the bus line to be suitable for their characteristics, thereby improving throughput of the bus arbitration.