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. 24, 1998
Filed:
Aug. 27, 1996
Alexander Joffe, Palo Alto, CA (US);
MMC Networks, Inc., Sunnyvale, CA (US);
Abstract
In the first period of time during arbitration, each unit requesting access to the bus examines two or more MSBs of its priority number, and indicates these bits by signals on the bus. Thus, the units are divided into groups based on two or more MSBs of the units' priority numbers; at the end of the first period of time, the bus identifies one of the groups which wins arbitration over the remaining groups. In a second period of time, the units of the winning group that request access to the bus examine the next bits of their priority numbers, and indicate these bits by signals on the bus. Thus, the units of the winning group are divided into subgroups based on the next bits of the priority numbers. At the end of the second period of time, the bus indicates the winning subgroup. Arbitration proceeds in this way until the winning unit is determined. The winning unit changes its priority to the lowest priority. All the units that had lower priority than the winning unit increase their priorities. Initial priority numbers are determined from the device numbers.