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. 20, 2000
Filed:
Feb. 01, 1999
James P Rivers, Saratoga, CA (US);
Gregory L DeJager, San Jose, CA (US);
David H Yen, Palo Alto, CA (US);
Stewart Findlater, Mountain View, CA (US);
Bradley Erickson, Belmont, CA (US);
Scott A Emery, Saratoga, CA (US);
Cisco Technology Inc., San Jose, CA (US);
Abstract
A memory system reducing or eliminating the effects of DRAM page-opening delays or row access delays is provided. The system uses DRAM and fast memory such as SRAM. SRAM is used to store the initial portions of data from data blocks and corresponding portions of DRAM are used to store the terminal portions of data from the data blocks. When access to a block of data is requested, DRAM row access procedures are initiated. During the delay period, while DRAM row access procedures are occurring, the initial portion of data from the requested block is read-out from SRAM. By about the time the initial data read-out from SRAM is completed, DRAM row access procedures are completed and the remaining portion of the data is read-out from DRAM.