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:
Jun. 19, 2012
Filed:
Jul. 24, 2009
Ming-dar Chen, Taipei, TW;
Hsiang-an Hsieh, Taipei, TW;
Chuan-sheng Lin, Taipei, TW;
A-Data Technology (Suzhou) Co., Ltd., Suzhou, Jiangsu Province, CN;
Abstract
A non-volatile memory of present invention includes a number of memory blocks and a static wear leveling device. The static wear leveling device includes a memory unit for storing the erase counts of the memory blocks and a controlling unit for getting the erase counts from the memory unit, and calculating the standard deviation based on the EC, and deciding the way of the static wear leveling cycle according to the standard deviation. The controlling unit deciding the way of the static wear leveling cycle include the steps of setting at least one predetermined threshold point and judging whether the standard deviation of the erase counts is smaller than the predetermined threshold point. If the standard deviation of the erase counts is smaller than the predetermined threshold point, the static wear leveling cycle starts for a first amount of cycles and moves the static data stored a first number of memory blocks. If the standard deviation of the erase counts is bigger than the predetermined threshold point, starts for a second amount of cycles and moves the static data stored a second number of memory blocks.