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:
Aug. 07, 2018

Filed:

Mar. 03, 2016
Applicant:

Kabushiki Kaisha Toshiba, Tokyo, JP;

Inventors:

Hiroki Noguchi, Kanagawa, JP;

Shinobu Fujita, Tokyo, JP;

Keiko Abe, Kanagawa, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 11/20 (2006.01); G06F 12/16 (2006.01); G11C 29/52 (2006.01); G11C 11/16 (2006.01); G06F 12/0802 (2016.01); G06F 11/10 (2006.01); G11C 29/04 (2006.01);
U.S. Cl.
CPC ...
G06F 11/2069 (2013.01); G06F 11/1004 (2013.01); G06F 11/1068 (2013.01); G06F 12/0802 (2013.01); G06F 12/16 (2013.01); G11C 11/1677 (2013.01); G11C 29/52 (2013.01); G11C 2029/0411 (2013.01);
Abstract

A memory control circuit has an error determination circuitry to determine whether an error-bit number is larger than a predetermined threshold value set based on a maximum number of error bits correctable by the error correction circuitry, when it is detected by the error detector that an error is contained in data read for verification of data written to the first memory or in data read from the first memory, and an access controller to control access to a second memory having an access priority lower than the first memory when it is determined that the error-bit number is larger than the threshold value, and to control access to the first memory without accessing the second memory when it is determined that the error-bit number is equal to or less than the threshold value.


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