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:
Dec. 30, 2003
Filed:
Jul. 28, 1999
Yuval Bachar, Sunnyvale, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A device and procedure for associating an identifier with each of a plurality of slave units in a master slave system is provided. In one aspect, a master outputs a signal on a multi-line bus with a single, preferably lowest-numbered, line pulled-up and the remaining lines pulled-down. A first slave in a daisy chain communication architecture, in response to the pull-up of the bus wire configures itself with the lowest-numbered slave number, preferably so as to respond to a lowest-numbered com line. The first slave unit then outputs, to the next slave unit, a signal on the multi-line bus with the next-higher numbered line pulled-up and all other lines pulled-down. In response, the second slave unit will configure itself with the second-lowest slave identifier number such as configuring itself to respond to the second-lowest com line, and so forth. The system can be implemented to eliminate the need for slave addressing and can be implemented with relatively few components in a low cost and non-complex fashion.