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:
Sep. 17, 2002
Filed:
Jul. 02, 1999
Richard M. Barth, Palo Alto, CA (US);
Ramprasad Satagopan, San Jose, CA (US);
Anil V. Godbole, Cupertino, CA (US);
Rambus Inc., Mountain View, CA (US);
Abstract
A memory controller includes a constraint tracking and checking unit for tracking and checking timing constraints imposed by respective issued commands to access a memory. A constraint tracking subunit includes multiple tracking circuits and an allocation circuit. The allocation circuit is configured to allocate a selected tracking circuit from among the multiple tracking circuits each time that a specific command is issued. The allocated tracking circuit is configured to track the timing constraint imposed by the specific command. A constraint checking subunit is configured to determine if the tracked timing constraint is pending against issuance of a generated command to access the memory and to generate a blocking signal when a timing constraint is pending against issuance of a generated command.