发明名称 |
Semiconductor memory, method for controlling refreshment of it, and method for setting memory cell array specific area for realizing the control method |
摘要 |
In accordance with the present invention, in order to reduce an averaged consumption current in a stand-by state, there is provided a semiconductor memory device including a memory cell array area which is divided into a plurality of areas, wherein the semiconductor memory device includes: at least one specific area setting unit being electrically coupled to said memory cell array area and adopted to set at least one area defined in said plurality of areas in accordance with an optional criterion; and at least one refresh operation control unit being electrically coupled to said memory cell array area and adopted to perform a refresh operation to the specific area based on at least one kind of specific refresh control signal, which is longer in cycle than a basic refresh control signal at least in a predetermined state of the semiconductor memory device.
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申请公布号 |
US6898142(B2) |
申请公布日期 |
2005.05.24 |
申请号 |
US20030415604 |
申请日期 |
2003.04.30 |
申请人 |
NEC ELECTRONICS CORPORATION |
发明人 |
TAKAHASHI HIROYUKI |
分类号 |
G11C11/401;G11C11/403;G11C11/406;(IPC1-7):G11C7/00 |
主分类号 |
G11C11/401 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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