Patent ID: 8234428

Claim:
An arbitration device comprising: a first storage circuit configured to hold first data; a second storage circuit configured to hold second data; a first selection circuit connected to the first storage circuit and the second storage circuit, and configured to select the first data or the second data according to a first selection signal; a first measuring circuit configured to measure a first period during which the first selection circuit selects the first data; a second measuring circuit configured to measure a second period during which the first selection circuit selects the second data; a second selection circuit connected to the first measuring circuit and the second measuring circuit, and configured to select the first period or the second period according to the first selection signal; a first control circuit configured to output the first selection signal according to the first period and the second period; a third storage circuit configured to hold either the first data or the second data which is selected by the first selection circuit; a fourth storage circuit configured to hold third data; a third selection circuit connected to the third storage circuit and the fourth storage circuit, and configured to select the third data or either the first data or the second data which is selected by the first selection circuit according to a second selection signal; a third measuring circuit configured to measure a third period during which the third selection circuit selects either the first data or the second data; a fourth measuring circuit configured to measure a fourth period during which the third selection circuit selects the third data; and a second control circuit configured to output the second selection signal according to either the selected first period or the selected second period and the third period and the fourth period.