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. 16, 2007
Filed:
Jul. 04, 2003
Chin-long Lin, San Jose, CA (US);
Ren-yuh Wang, Cupertino, CA (US);
Chin-Long Lin, San Jose, CA (US);
Ren-Yuh Wang, Cupertino, CA (US);
Sigmatel, Inc., Austin, TX (US);
Abstract
The invention provides a system and method for memory bus assignment for a plurality of functional devices. According to a preferred embodiment, the invention provides a system comprising a plurality of functional devices accessing a memory bus wherein the memory bus allows access by one of the functional devices for one cycle of period of time, a plurality of request agents corresponding to the functional devices, a control register respectively storing access priority grades for the request agents, a plurality of counter timers respectively loading the access priority grades; and a bus elector coupled with the counter timers wherein the bus elector respectively compares the loaded access priority grades and elects one out of the request agents according to the compared access priority grades. The memory bus accordingly allows access by one of the functional devices corresponding to the elected request agent for one cycle of period of time.