| 摘要 |
PURPOSE:To suppress a current required for refreshing a dynamic memory to a low value by deirding a memory into plural blocks and sequentially refreshing respective with shifting a time. CONSTITUTION:A control part 10 is connected with plural memory blocks 1, 2...n through a bus 15 and is connected with various adapters 17 such as a disk control part, a line control part and the like. A memory refresh request signal from the control part 10 is firstly inputted to the memory block 1 through a refresh request signal line 16, and the memory block 1 is refreshed. The memory block 1 outputs the refresh signal to the memory block 2 which has been refreshed. The fresh memory 2 receives the refresh request signal and refreshes itself. Thus, memory blocks 3, 4... sequentially execute refreshing. Consequently, the capacity of power source required is reduced, whereby total cost is reduced.
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