PROBLEM TO BE SOLVED: To provide an arbiter in which use efficiency of a bust master of a higher priority is prevented from being oppressed with respect to a plurality of bus masters of approximately equal priorities.;SOLUTION: A bus arbiter 100 arbitrates bus acquisition requests from a plurality of bus masters 110 connected to a common bus 12 on the basis of preset priorities of the bus masters. The bus arbiter 100 comprises bus acquisition request monitor means 14 which monitors a first bus acquisition request from a first bus master of a highest priority and a second bus acquisition request from a second bus master of a priority approximately equal to the first bus master, specific event detection means 15 which acquires a monitor result of the bus acquisition request monitor means and detects a specific event in which a frequency of the first bus acquisition request and a frequency of the second bus acquisition request meet a predetermined criterion, and bus acquisition control means 13 which acquires a specific event detection signal from the specific event detection means and restricts the frequency of the second bus acquisition request.;COPYRIGHT: (C)2013,JPO&INPIT
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