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. 14, 1995
Filed:
Dec. 09, 1992
Walter R Friedrich, Pleasanton, CA (US);
David C Brief, Palo Alto, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A controllable physical connection management (PCM) pseudo code user interface is disclosed for use in the physical layer controller of a station or concentrator that is capable of insertion into a data transmission network that is capable of operating substantially in accordance with the FDDI protocol. In one aspect of the invention, the interface permits the user to direct the PCM state machine to pause after entering the Next state after the transmission of any pseudo code signalling bit. In another aspect of the invention, the interface permits a user to load a hardware register with the pseudo code signalling information to be transmitted before the signalling begins. However, Complete control of the pseudo code signalling is retained by the user during the signalling process to permit midstream changes in the pseudo code sequence to protect against communications with unexpected neighboring port configurations and to permit custom pseudo code signalling sequences.