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. 02, 2025
Filed:
Mar. 21, 2024
Silicon Motion, Inc., Zhubei, TW;
Cheng-Yu Tsai, Kaohsiung, TW;
SILICON MOTION, INC., Zhubei, TW;
Abstract
The invention introduces a method for garbage collection (GC) in a flash memory device, performed by a processing unit, includes: finding a source block (SBLK) associated with a hit accumulated valid page count (VPC) that is the first one exceeding a total number of physical pages in one destination block (DBLK); labeling the found SBLK and its subsequent SBLKs as first-type SBLKs; labeling the other SBLKs as second-type SBLKs; obtaining Host-address To Flash-address mapping (H2F) sub-tables corresponding to valid pages stored in the second-type SBLKs; in the scanning for each H2F sub-table, detecting valid pages stored in the first-type and the second-type SBLKs, and appending records into a GC table for the valid pages; and reprogramming user data of a designated physical page in a designated first-type or second-type SBLK into a designated physical page in the DBLK according to each record in the GC table.