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:
Feb. 18, 2020
Filed:
Jul. 27, 2018
Western Digital Technologies, Inc., San Jose, CA (US);
Shajith Musaliar Sirajudeen, Karnataka, IN;
Taninder Sijher, Karnataka, IN;
WESTERN DIGITAL TECHNOLOGIES, INC, San Jose, CA (US);
Abstract
A storage device comprises a controller, such as an ASIC controller, and one or more NAND flash memory devices. The controller comprises a differential receiver and a delay locked loop circuit. During read and write operations, the controller is configured to vary a delay of a data strobe signal by an interval across a width of a data window using the delay locked loop circuit, and to compare a write pattern to a read pattern for each delayed interval to determine the timing margins of the storage device. During read and write operations, the controller is further configured to apply a reference voltage to a host interface or a memory interface, increment and decrement the reference voltage by a set value, and compare a write pattern to a read pattern for each varied reference voltage value to determine the voltage margins of the storage device.