Patent ID: 7324508

Claim:
A crossbar switching circuit, for coupling a plurality of source providers to a plurality of source consumers according to requests of the plurality of source consumers, the crossbar switching circuit comprising: a plurality of source consumer terminals, for coupling to the source consumers, respectively; a plurality of source provider terminals, for coupling to the source providers, respectively; a plurality of first counters, wherein one of the first counters is disposed in one of the source consumer terminals, and one of a plurality of first predetermined values and one of a plurality of first initial values are both preset in each of the first counters based on a request of the corresponding source consumer for indicating a current latency state of a resource requested by the corresponding source consumer; and a plurality of second counters, wherein one of the second counters is disposed in one of the source consumer terminals, and one of a plurality of second predetermined values and one of a plurality of second initial values are both preset in each of the second counters based on a request of the corresponding source consumer for indicating a current bandwidth state of the resource requested by the corresponding source consumer; wherein, coupling states between the source consumer terminals and the source provider terminals are determined based on the states of the first counters and the second counters.