发明名称 |
SEMICONDUCTOR STORAGE DEVICE AND CONTROL METHOD THEREOF |
摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor storage device capable of reducing a power source voltage supplied to a memory circuit and reducing the power consumption.SOLUTION: The semiconductor storage device is configured to: set a flag to a register circuit and hold an address into which writing is executed in a case where a voltage monitoring circuit detects that a voltage to be supplied is equal to or lower than a required voltage when data is written into a memory cell of a memory core having a refresh function; and causing the memory core to perform rewriting to the held address by a refresh operation according to the flag registered to the register circuit. As a result, even when a supply voltage is reduced, a holding lifetime of the memory data is secured to allow higher operation speed and to reduce the power consumption without reducing the throughput. |
申请公布号 |
JP2015153439(A) |
申请公布日期 |
2015.08.24 |
申请号 |
JP20140026643 |
申请日期 |
2014.02.14 |
申请人 |
FUJITSU SEMICONDUCTOR LTD |
发明人 |
FUJIOKA SHINYA |
分类号 |
G11C11/22;G11C11/401;G11C11/406 |
主分类号 |
G11C11/22 |
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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