| 摘要 |
PURPOSE: To shorten the self refresh reset time. CONSTITUTION: When a self refresh determination signalϕSR* is asserted to Low level, row decoders in memory mat parts MM1-MM4 to be self refreshed are activated sequentially and selectively. When the self refresh determination signal is negated, the selective activation is interrupted and a transition is made to normal operation mode. Since the self refresh can be reset without waiting the end of self refresh for all memory mat parts MM1-MM4, the refresh reset time can be shortened. |
