Title:
SEMICONDUCTOR MEMORY
Document Type and Number:
Japanese Patent JP3784844
Kind Code:
B2
Abstract:
PURPOSE: To eliminate the need for write access to a subdirectory on a memory part and improve the performance in such a case by storing information on the subdirectory not in the memory part, but in a subdirectory storage part when a request for writing to the subdirectory is accepted.
CONSTITUTION: This semiconductor memory is equipped with a subdirectory storage part 111 which consists of an overwritable nonvolatile memory and stores information in the subdirectory when the request to write data in the subdirectory whose position is indicated by the directory storage part 109 is received. Thus, when the request for writing to the subdirectory is received, the information is written not in the memory part 106, but in the subdirectory storage part 111. Consequently, even when a file under the control of the subdirectory is deleted or when data which are larger than the current data capacity are written, the rewriting of the memory part 106 can be suppressed and the performance of the device 101 is therefore improved.
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Inventors:
Yusaku Unno
Application Number:
JP8401794A
Publication Date:
June 14, 2006
Filing Date:
March 30, 1994
Export Citation:
Assignee:
Oki Electric Industry Co., Ltd.
International Classes:
G06F12/00; G11C17/00; G11C16/02; G11C16/06; (IPC1-7): G06F12/00; G11C16/06
Domestic Patent References:
| JP5241741A | ||||
| JP59058569A | ||||
| JP5027924A | ||||
| JP5282889A | ||||
| JP62159251A | ||||
| JP5151097A |
Foreign References:
| GB2251324A |
Attorney, Agent or Firm:
Yukio Sato
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