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:
Sep. 28, 1993
Filed:
Jun. 24, 1992
Bernard van Steenbrugge, Eindhoven, NL;
Henricus F de Leeuw, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A multi-station communication bus system allows for the use of several master stations by way of an arbitration organization. A message contains a master address which is subjected to an arbitration operation, a slave address with space for a slave address acknowledge bit, a control signal with space for a control acknowledge bit, and one or more data bytes. Per data byte an indication of the 'last' byte is also transmitted and space is reserved for a data acknowledge bit. When a data acknowledge bit is not correctly received, the data byte in question is repeated until at the most the maximum frame length is reached. The remainder of a message is then placed in a next frame. If an address or control acknowledge bit is not correctly received, the relevant frame is terminated. In case of a plurality of bytes in a message, the first frame thereof has a lock control signal that is activated upon communication of at least one data byte. Moreover, the last byte of the message is put in a separate frame that has an unlock control signal which is activated upon communication of the last byte.