A method and apparatus for arbitrating between a plurality of masters for use of a common bus. Arbitration is preferably performed based on an urgency and a predetermined priority of a master requesting use of the common bus, wherein a lower priority master requesting urgent use of the common bus can...http://www.google.com/patents/US7058742?utm_source=gb-gplus-sharePatent US7058742 - Method and apparatus for arbitrating common bus by using urgent channel
