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, 1997
Filed:
Oct. 11, 1994
Thomas W Thomson, Santa Cruz, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A CAN node having an enhanced fault recovery system is disclosed. The CAN node includes a CAN protocol controller device which reconnects to a CAN bus from the node's busoff state only after the node has successfully decoded 128 good messages from other devices on the CAN bus. Such a system advantageously provides a CAN node which exits its busoff state with a high degree of confidence that the fault that caused the node to enter the busoff state has been cleared. The protocol controller device uses the eleven recessive bits that start at the acknowledgement delimiter and finish at the end of the third bit of intermission to recognize that a single message has been successfully decoded.