Invention Grant
US08953354B2 Semiconductor memory device and method of driving semiconductor memory device
有权
半导体存储器件及驱动半导体存储器件的方法
- Patent Title: Semiconductor memory device and method of driving semiconductor memory device
- Patent Title (中): 半导体存储器件及驱动半导体存储器件的方法
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Application No.: US13488517Application Date: 2012-06-05
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Publication No.: US08953354B2Publication Date: 2015-02-10
- Inventor: Yoshiyuki Kurokawa
- Applicant: Yoshiyuki Kurokawa
- Applicant Address: JP Atsugi-shi, Kanagawa-ken
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Atsugi-shi, Kanagawa-ken
- Agency: Fish & Richardson P.C.
- Priority: JP2011-129142 20110609
- Main IPC: G11C7/10
- IPC: G11C7/10 ; G11C7/22 ; G11C15/04 ; G06F12/08

Abstract:
A semiconductor memory device includes a memory portion that includes i (i is a natural number) sets each including j (j is a natural number of 2 or larger) arrays each including k (k is a natural number of 2 or larger) lines to each of which a first bit column of an address is assigned in advance; a comparison circuit; and a control circuit. The i×j lines to each of which a first bit column of an objective address is assigned in advance are searched more than once and less than or equal to j times with the use of the control circuit and a cache hit signal or a cache miss signal output from the selection circuit. In such a manner, the line storing the objective data is specified.
Public/Granted literature
- US20120314513A1 SEMICONDUCTOR MEMORY DEVICE AND METHOD OF DRIVING SEMICONDUCTOR MEMORY DEVICE Public/Granted day:2012-12-13
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