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:
Oct. 19, 2010
Filed:
Jun. 22, 2007
Jianjun Luo, Sunnyvale, CA (US);
Chris Tsu, Saratoga, CA (US);
Charles Chung Lee, Cupertino, CA (US);
David Queichang Chow, San Jose, CA (US);
Jianjun Luo, Sunnyvale, CA (US);
Chris Tsu, Saratoga, CA (US);
Charles Chung Lee, Cupertino, CA (US);
David Queichang Chow, San Jose, CA (US);
SuperTalent Electronics, Inc., San Jose, CA (US);
Abstract
A flash memory system includes flash memory organized into a plurality of blocks of pages for storage of information, a page including data and spare, the blocks being identifiable, within the flash memory, by a physical address. The system further has a flash controller for communicating with a host and the flash memory and includes volatile memory for storing a source-shadow table of logical addresses identifying blocks addressable by the physical addresses. The source-shadow table has an address mapping table and a property value table. The property value table is used to store property values, each of which is associated with a block of a predetermined group of blocks and is indicative of the number of times a block has been written since the last erase operation performed thereon. The property values correspond to the logical addresses of the address mapping table, wherein a block having been written no more than two times is re-written to different areas of the flash memory without requiring an erase operation.