System and method for reprogramming vehicle computers
US5278759A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1991 |
| Grant date | Jan 11, 1994 |
| Priority date | — |
| Expiry date | May 7, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.