| 摘要 |
PURPOSE:To substitute the element, of main storage device for a new high speed storing element and to eliminate the need for addition of a new hardware when the performance of a device is improved by setting a cycle time so as to change to intialization setting and controlling the control of a bank busy according to the cycle time. CONSTITUTION:A memory request signal on a signal line 108 is received by a request receiving circuit 9 and one of the memory request signal is outputted to the corresponding bank on signal lines 100-107. When the bank requested by the memory request signal outputted to a bank busy control circuit 13 through a signal line 111 from a request priority decision circuit 17 is busy, a relevant request is waited until the busy state of the relevant bank is canceled by a bank busy signal on a signal line 125. Herein, a control is executed by the bank busy control circuit 23 so as to make the waited request different from a request source and receive a succeeding request to the different bank. |
