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:
Feb. 04, 2003
Filed:
Dec. 28, 1999
Francis G. Bredin, Maisons Alfort, FR;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A mixed rotative and weighted arbiter for arbitrating the priority of request signals R1-Rn supplied from a plurality of devices is disclosed. The arbiter is composed of a token circuit which delivers a token vector having one position set active. The token vector as well as the plurality of request signals are input to a rotative arbitration circuit. The rotative arbitration circuit processes a round robin algorithm to output a rotative request vector having input requests ordered from a higher to a lower priority configuration according to the active position of the token vector. The arbiter further comprises a weighted arbitration circuit connected to the output of the rotative arbitration circuit for generating a weighted request vector determining a linear priority configuration of the rotative request vector. A grant generation circuit is connected to the output of the weighted arbitration circuit and to the output of the token circuit to deliver a grant order to the device which may gain access to the bus and a plurality of no grant orders to the others devices.