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:
Apr. 05, 2016
Filed:
Aug. 17, 2012
Chang-kai Cheng, Hsinchu, TW;
Chang-Kai Cheng, Hsinchu, TW;
SILICON MOTION, INC., Jhubei, Hsinchu County, TW;
Abstract
A data storage device is disclosed. In one embodiment, the data storage device comprises a flash memory and a controller. The flash memory comprises a plurality of blocks, wherein each block comprises a plurality of pages, and each page comprises a plurality of data trimming units which is a smallest unit for data modification. After a data trimming process has been performed on an address range of the flash memory, the controller determines a last page corresponding to an ending address of the address range, determines whether data values stored in the last page with addresses subsequent to the ending address are all equal to a specific data pattern, and sets the value of a trimming flag corresponding to the last page to be 1 when the data values stored in the last page with addresses subsequent to the ending address are all equal to the specific data pattern.