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. 02, 2002
Filed:
Aug. 29, 2000
Sucheta Sudhir Chodnekar, Allentown, PA (US);
Frederick Harrison Fischer, Macungie, PA (US);
Kenneth Daniel Fitch, Allentown, PA (US);
Avinash Velingker, Orefield, PA (US);
James Frank Vomero, Catasauqua, PA (US);
Shaun Patrick Whalen, Wescosville, PA (US);
Agere Systems Guardian Corp., Orlando, FL (US);
Abstract
A method and apparatus allowing efficient access control to a common data bus by including an isolation device to separate the common data bus, a priority-based arbiter to control access to the internal portion of the common data bus including a processor or other bus master, and a time slot arbiter to control access to the external portion of the common data bus including multiple bus masters, an external memory interface, etc. The common external memory may be allocated for exclusive or non-exclusive use by the various devices utilizing either portion of the isolated common data bus. External devices accessing the external memory may communicate directly with one or more bus masters, e.g., on the internal portion of the common data bus.