| 摘要 |
PROBLEM TO BE SOLVED: To provide a memory access control device for executing memory readout at a high speed by reducing a processing waiting time during memory access of a microprocessor and a DMA master. SOLUTION: The memory access control device controls the memory access from the microprocessor and DMA master. The memory access control device includes an access arbitration means for arbitrating readout requests from the microprocessor and DMA master, and a command generation means for generating a command signal to be transmitted to a memory in accordance with an arbitration result of the access arbitration means. When the access arbitration means determines the readout requests are made simultaneously from the microprocessor and DMA master, the command generation means successively transmits a command signal for the microprocessor and a command signal for the DMA master to the memory in accordance with predetermined priority. COPYRIGHT: (C)2009,JPO&INPIT
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