In a multi-mode scheduler including a N×kM scheduler for adjusting data transmission between N-pieces of input interface sections and kM-pieces of output interface sections, the multi-mode scheduler, k-pieces of N×M schedulers to be the N×kM scheduler, and (k−1)-pieces of selection circuits for switching allocated output port information input from an outside of the N×kM scheduler and information from a N×M scheduler at front step, so as to be input to the N×M scheduler as allocated output port information, and two operations are set freely with a switching operation of the selection circuits. As a result, it is possible to provide a general scheduler.
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