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:
Aug. 03, 2004
Filed:
Sep. 11, 2002
Paul S. Lazar, Santa Clara, CA (US);
Nanoamp Soutions, Inc, San Jose, CA (US);
Abstract
An enhanced arbitration and control subsystem for a self-refreshing DRAM has a normal mode of operation and a test mode of operation in which an internal refresh cycle is automatically performed prior to each external access cycle. A first gate is opened in a normal mode of operation to enable internal refresh cycles upon receipt of an internal refresh request signal. The first gate is closed in a test mode to disable any internal refresh requests. A second gate is opened in the test mode of operation to provide a path for an external access request signal to first trigger initiation of an internal refresh cycle prior to an external access cycle. The second gate is closed in a normal mode of operation to allow normal arbitration between internal refresh request signals and external RAS request signals.