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:
Jan. 07, 2003
Filed:
May. 18, 1999
Osamu Ishikawa, Tokyo, JP;
Toshikazu Ito, Tokyo, JP;
Satoshi Yamamoto, Tokyo, JP;
Yoshikazu Endo, Tokyo, JP;
Oki Data Corporation, Tokyo, JP;
Abstract
A bus arbitration system uses different arbitration rules at different times, by periodically changing the priority order of the bus masters; by masking further bus requests from a particular bus master for a certain interval each time that bus master is granted the use of the bus; by masking requests from bus masters other than a central processing unit for certain intervals while the central processing unit is processing an interrupt; by raising the priority of a particular bus master if a bus request from that bus master remains unacknowledged for a certain interval; or by ignoring bus requests from the central processing unit while another bus master is performing a certain process.