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:
Nov. 16, 2004
Filed:
Apr. 10, 2002
Hideyuki Kanzaki, Takarazuka, JP;
Masataka Osaka, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka-Fu, JP;
Abstract
A memory control device for arbitrating memory access contention among bus masters while ensuring, regarding each bus master, the required transfer rate within the required time margin. A device external to LSI writes into the transfer rate information storage unit the transfer rate information indicating the transfer rate and the time period within which the transfer rate is to be ensured. In response, the timing information generator unit determines the shortest time period as a cycle, and also determines, regarding each bus master, time taken to ensure the required transfer rate based on the memory bus bandwidth as a bus use permission time period. The arbiter unit grants the bus use right sequentially with the passage of time to each bus master issuing a bus request for the corresponding bus use permission time period.