SEMICONDUCTOR STORAGE DEVICE AND CONTROL METHOD

PROBLEM TO BE SOLVED: To provide a semiconductor storage device corresponding to a Trim command. SOLUTION: Each block in a chip is divided into a first page set consisting of a plurality of pages and a second page set consisting of a plurality of pages. A logical address space is divided into a plur...

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Bibliographic Details
Main Authors MIZUSHIMA EIGA, MORINO TOKAI
Format Patent
LanguageEnglish
Published 06.05.2011
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To provide a semiconductor storage device corresponding to a Trim command. SOLUTION: Each block in a chip is divided into a first page set consisting of a plurality of pages and a second page set consisting of a plurality of pages. A logical address space is divided into a plurality of groups, each group being divided into a plurality of lines. A plurality of sets of block units are created by collecting a predetermined number of blocks from each of the plurality of chips, and the predetermined number of block units are made standard block units and the others are made spare block units. One of the groups is associated to each standard block unit. The data of the associated group is stored in the page of the first page set of the plurality of blocks constituting the standard block unit, and the unwritten page of the second page set records the updated data of its group data. A memory controller specifies the group including the logical address and its unnecessary line according to the Trim command, and records the line number in a line management table. COPYRIGHT: (C)2011,JPO&INPIT
Bibliography:Application Number: JP20090243480