| 摘要 |
PROBLEM TO BE SOLVED: To evade data destruction and access competition in an arithmetic unit provided with a sharing memory between plural processors. SOLUTION: A sharing memory 10 used in common between a master processor and a co-processor core includes buffers B0, B1. An access control part 11 makes the each one of the buffers B0, B1 access the each one of the master processor and the co-processor exclusively in response to buffer assigning data BN. The buffer assigning data BN is stored in a control register allocated to a specified address and rewritten softwarewisely by the master processor.
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