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:
Jan. 11, 1994
Filed:
May. 07, 1991
Charles J Berra, Troy, MI (US);
Alan J Amici, Dearborn, MI (US);
Chrysler Corporation, Highland Park, MI (US);
Abstract
A system and method for reprogramming a non-volatile memory of one or more on-board vehicle computers through a serial communication link between an off-board controller and the on-board vehicle computer. An interface circuit is also provided on the vehicle in order to process the command signals from the portable controller which will enable the non-volatile memory to receive and store new computer program code. The method follows a predetermined transfer protocol which assists in preventing the existing computer program code stored in the non-volatile memory from being improperly erased or re-written. This transfer protocol includes the transmission of a command signal from the off-board controller which has a voltage level that exceeds the voltage level of any signal which may recognized on the serial communication link.