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:
Mar. 08, 2011
Filed:
Jun. 05, 2008
Teppei Hirotsu, Hitachi, JP;
Kotaro Shimamura, Hitachinaka, JP;
Teruaki Sakata, Tokai, JP;
Noboru Sugihara, Kokubunji, JP;
Teppei Hirotsu, Hitachi, JP;
Kotaro Shimamura, Hitachinaka, JP;
Teruaki Sakata, Tokai, JP;
Noboru Sugihara, Kokubunji, JP;
Renesas Electronics Corporation, Kawasaki-shi, JP;
Abstract
There is provided a technique which reduces an average processing time of low-priority accesses with suppressing an average delay increase of a high-priority access processing even in a case where high-priority access request and a low-request access request are simultaneously generated to a shared access processing unit and high-priority accesses are continuously generated. And, there is provided an access arbitration equipment comprising: an issued access request retention unit; a first interval determination circuit; and a second interval determination circuit. In a case where the first interval determination circuit determines that an interval is generated between an issued access processing and a most prior access processing and a second interval determination circuit determines that no interval is generated between the issued access processing and a second-prior access request, the priority order of the most prior access request and the second-prior access request is changed.