| 摘要 |
PROBLEM TO BE SOLVED: To provide a memory access device capable of performing efficient access even when the order of commands to be transferred to a memory device is changed while preventing a command issued from a bus master from being continuously overtaken by the following commands issued from another bus master or the same bus master.SOLUTION: Plural commands each issued from plural bus masters 110-112 are held by the corresponding command queues 130-132. A master arbitration part 150 selects a specific bus master from the plural bus masters 110-112. Command selection sections 140-142 provided corresponding to the command queues 130-132, selects one command from a command group within a performance assured period while changing the order of commands within the performance assured period which is a period of time the processing is ensured. |
