| 摘要 |
PROBLEM TO BE SOLVED: To provide a memory controlling method and device capable of arbitrating various memory access requests by simple circuit constitution and reducing the deterioration of memory access performance. SOLUTION: An arbiter 6 arbitrates refresh requests, read/write requests, etc., respectively outputted from the masters of a refresh controller 2, write DMA controllers 3-1, 3-2, read DMA controllers 4-1, 4-2, and a CPU bus interface 5 on the basis of priority and refreshes a DRAM 10 during the execution of an interleaving operation where read operations and write operations are performed continuously.
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