Bus arbitration system

Details Bus arbitration system Bus arbitration system

G - Physics

06

F

G06F 13/364 (2006.01) G06F 13/362 (2006.01)

Patent

CA 2055962

Abstract of the Disclosure A bus arbitration system is capable of granting access to an expansion bus to devices following two-wire bus arbitration protocol or a three-wire bus arbitration protocol. The bus arbitration system receives a plurality of bus request signals from a plurality of devices. Each bus request signal is made up of one or more coded pulses and has a predetermined priority. A priority encoder receives the bus request signal and assigns a priority level to each bus request signal. An arbiter determines and stores in memory which bus request signal has a highest priority and whether the device follows two-wire bus arbitration protocol or a three-wire bus arbitration protocol. The expansion bus grants access to the bus to the device having the highest priority once a previous device if any, has relinquished the bus.

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