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:
Dec. 10, 2013
Filed:
Mar. 17, 2011
Naoki Kobayashi, Tokyo, JP;
Mitsuaki Honma, Yokohama, JP;
Noboru Shibata, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, a system includes a memory, a controller which controls an operation of the memory in a data program, and data bus which connects the memory to the controller. The memory comprises a memory cell array with memory cells which have a bit assignment to 2(x is an integer number of 3 or more) threshold distributions, each memory cell storing x bits, and a control circuit which controls the data program of x bits to the memory cells. The controller comprises a first step generating y bit (y is an integer number and y<x) based on x bits, transferring y bit to the memory, and generating 2threshold distributions based on y bit in the memory, and a second step executing after the first step, transferring x bits to the memory, and generating the 2threshold distributions based on x bits in the memory.