| 摘要 |
PROBLEM TO BE SOLVED: To provide a dynamic semiconductor memory device and a power saving mode operating method of this device. SOLUTION: This device is constituted of a memory cell array provided with a plurality of memory cells connected between a plurality of word lines and a plurality of bit lines, a mode setting register inputting a mode setting code applied from the outside in accordance with a mode setting command and generating a power saving mode control signal for power saving mode operation, and an address control part decoding an address or a refresh address applied from the outside at the time of normal mode operation, selecting one word line out of the plurality of word lines, excluding the prescribed bit of an address or the refresh address applied from the outside at the time of power saving mode operation, decoding it, and selecting the prescribed word lines simultaneously out of the plurality of word lines. Therefore, a refresh period is extended at the refresh operation, and power consumption can be reduced by that a refresh time is reduced. COPYRIGHT: (C)2005,JPO&NCIPI
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