Importance

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Abstract

In a bus arbitration network comprising a common bus network, a plurality of bus masters, and a bus arbiter, each of the bus masters supplies others of the bus masters through the common bus network with either a normal bus request signal or a particular bus request signal having a high priority in comparison with the normal bus request signal. A bus request signal is also supplied from each bus master to the bus arbiter which delivers a bus acknowledgement signal to each bus master. Supply of either the normal or the particular bus request signal and the bus request signal is prohibited by each bus master when each bus master is supplied with the particular bus request signal from the other bus masters. A lock signal may be delivered from each bus master to the other bus masters through the common bus network to continuously use the common bus network. Reception of such a lock signal in each bus master results in interruption of production of either the normal or the particular bus request signal and the bus request signal.

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First Claim