The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 05, 2017
Filed:
Aug. 20, 2013
Chuo University, Hachioji-shi, Tokyo, JP;
CHUO UNIVERSITY, Hachioji-shi, Tokyo, JP;
Abstract
To reduce deterioration of non-volatile memory and write data at higher speed, writing data is stored in a ReRAM when a page utilization rate R is lower than a threshold Rthand/or the writing data is frequently-rewritten data. With an empty space Sempin the ReRAM being less than a threshold Sth (step S), when the data in the ReRAM is infrequently-rewritten data and the page utilization rate R obtained if target data is stored in a flash memoryis equal to or higher than a threshold value Rth(steps Sand S), data of logical sectors contained in N logical page addresses stored in a transfer list is read from the ReRAM to be written to the flash memory (steps Sto S). These steps reduce deterioration of the flash memory and allow higher data writing.