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:
Jun. 05, 2018
Filed:
Feb. 17, 2017
Apple Inc., Cupertino, CA (US);
Robert E. Jeter, Santa Clara, CA (US);
Rakesh L. Notani, Sunnyvale, CA (US);
Fabien S. Faure, Santa Clara, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A method and apparatus for using neighboring sampling points in a memory subsystem calibration is disclosed. In one embodiment, a memory subsystem includes a memory and a memory controller coupled thereto. A calibration unit in the memory controller is configured to perform calibrations of a data strobe signal and a reference voltage to determine eye openings for signals conveyed between the memory and the memory controller. Performing the calibration includes determining a number of different calibration points and computing initial scores for each of the calibration points. The method further includes calculating adjusted scores for each calibration point. For a given calibration point, the adjusted score includes weighted values of one or more calibration points that are adjacent thereto. The method further includes selecting a calibration point having the highest adjusted score as the calibrated value.