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:
Sep. 17, 2013
Filed:
Apr. 17, 2009
Takatsugu Sasaki, Kawasaki, JP;
Takatsugu Sasaki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
When a single error of data is detected by an ECC circuit, a cycle adjusting unit provided on a memory board shortens a refresh cycle Tof a refresh request generating unit to Tand causes a patrol controlling unit to intensively carry out an error patrol of an error-occurred address at a cycle T, which is slightly longer than the changed refresh cycle T. If an error is not detected for more than a predetermined period of time after the error patrol is started, the error patrol is stopped. Furthermore, if a single error is not detected for more than a predetermined period of time after the error patrol is stopped, the shortening of the refresh cycle is cancelled and returned to the original cycle.