A bus monitor section 8 calculates bus-occupancy rate for each of the DMA control sections 1 to 3 connected to a bus 5 in accordance with bus-use permission signals ack1 to ack3, respectively. Furthermore, a bus-use reconcilement section 6 changes manners of bus-use reconcilement control when the sum...http://www.google.de/patents/US6615291?utm_source=gb-gplus-sharePatent US6615291 - DMA controller with dynamically variable access priority
