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:
Oct. 10, 2006
Filed:
Jun. 14, 2004
Theodore C. White, Margarita, CA (US);
Dinesh Jayabharathi, Orange, CA (US);
Theodore C. White, Margarita, CA (US);
Dinesh Jayabharathi, Orange, CA (US);
Marvell International Ltd., Hamilton, BM;
Abstract
A system and circuit for reading and writing data to a buffer memory, which is Synchronous Dynamic Random access Memory ('SDRAM'), or Double Data Rate-Synchronous Dynamic Random Access Memory ('DDR') is provided. The circuit includes logic for managing programmable clock signal relationships such that data arrives at an optimum time for writing. Data that is to be written at DDR is moved from a first buffer clock to a DDR write clock signal and to a DQS signal that is based on a SDRAM clock signal. Also, plural tap-cells may be used to delay clock signals such that data and clock signals are aligned. An emulated DQS signal in a DDR capture scheme is used for reading from a SDRAM.