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:
May. 02, 2000
Filed:
Jul. 31, 1997
Daniel Linzmeier, Wheeling, IL (US);
Kevin L Kloker, Palatine, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A serial arbitration system utilizes an arbitration token containing a start bit, a request bit, a set of priority bits, and an error detection bit. The arbitration token is sent to each of the other processors (20, 21, 22) and is used to arbitrate control of a shared bus (38). A processor indicates that it is the master (20) by setting the start bit (120). It enters an arbitration by setting the request bit (124). The set of priority bits (134) contains a binary priority value encoded in bit major order. This format allows an optimized parallel comparison (128, 130) of the priority values for each of the requesting processors a bit at a time. Finally, processors drop out of the arbitration upon detecting (136) a parity error in an arbitration token received from another processor.