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:
Jul. 06, 2010
Filed:
May. 17, 2007
Joseph Macri, Sunnyvale, CA (US);
Steven Morein, Sunnyvale, CA (US);
Ming-ju E. Lee, Sunnyvale, CA (US);
Lin Chen, Cupertino, CA (US);
Joseph Macri, Sunnyvale, CA (US);
Steven Morein, Sunnyvale, CA (US);
Ming-Ju E. Lee, Sunnyvale, CA (US);
Lin Chen, Cupertino, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
Embodiments directed to a memory device and a memory controller that continue to operate in a low-power mode during the period required for analog timing circuitry to initialize and become usable, are described. During a low-speed to high-speed transition mode of operation for a high-speed interface, timing circuitry of the interface between the memory device and memory controller locks to a forward clock signal concurrent with the continued operation of the interface in low-speed mode. A reference clock signal configured to operate at a rate that provides both a high-speed mode and a low-speed mode and which is used as a single rate clock allows phase detection and correction circuitry to be disabled, thus allowing the idle period caused by a transition from low-speed mode to high-speed mode to be significantly reduced.