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.

Date of Patent:
Sep. 12, 2017

Filed:

Mar. 09, 2016
Applicant:

Toshiba Memory Corporation, Minato-ku, JP;

Inventors:

Yu Nakanishi, Yokohama, JP;

Daisuke Iwai, Yokohama, JP;

Kiwamu Watanabe, Kawasaki, JP;

Kenji Funaoka, Kawasaki, JP;

Tetsuya Sunata, Kawasaki, JP;

Keigo Hara, Ota, JP;

Marie Takada, Yokohama, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 29/00 (2006.01); G11C 29/02 (2006.01); G06F 11/10 (2006.01); G11C 7/22 (2006.01); G11C 29/42 (2006.01); G11C 29/52 (2006.01); G11C 29/04 (2006.01);
U.S. Cl.
CPC ...
G11C 29/028 (2013.01); G06F 11/1068 (2013.01); G11C 7/222 (2013.01); G11C 29/023 (2013.01); G11C 29/42 (2013.01); G11C 29/52 (2013.01); G11C 2029/0409 (2013.01); G11C 2029/0411 (2013.01);
Abstract

According to one embodiment, a memory system includes: a non-volatile memory; a memory interface that reads a received word from the non-volatile memory; a decoder that decodes the received word; a control unit that predicts the number of error bits in the received word read from the non-volatile memory, predicts decoding time on the basis of the number of error bits predicted, and determines an operating clock frequency of the decoder on the basis of the predicted decoding time and requested decoding time being the decoding time requested; and a frequency control unit that supplies the operating clock frequency determined by the control unit to the decoder and supplies voltage corresponding to the operating clock frequency being determined to the decoder.


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