| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a bus controller capable of reducing the deterioration of shared bus access performance due to a writing queue generated in a posted write system to such a level or below that no problem will occur. SOLUTION: When a reading request is issued after a writing request is issued from a master 11 to a resource 42 in a period that a shared bus 50 is occupied by a master 12, a writing detecting device 61 detects the reading request, and a reading generating device 71 inserts a dummy reading request following the writing request based on this detection. Thus, any writing request queue can be prevented from being jammed in a writing buffer 31. Therefore, the reading request is allowed to immediately reach the resource 42, and the cycle is quickly ended so that even when any access request from the master 12 to the resource 41 is present in that period, the processing can be executed without being left waiting.</p> |
