Robert Boschgmbh

Martin Wagener

Udo Schulz

Wolfgang Krampe

Jurgen Zimmermann

Juergen Zimmermann

Uwe Kleinschmidt

A method is provided for protecting stored-program control systems, in particular in motor vehicles, which offers a software protection system for programming. A programming routine for programming by an external device is subdivided into segments in such a way that queries for programming authorization can be accomplished between the individual segments.

Process for the protection of stored program controls from overwriting

Process for optimizing program parts for motor vehicle controllers

In a device for the serial exchange of data between two stations, each station has a serial interface which is connected to a common data transmission line. A first specific station has means which, during the reception of data, identify the two possible bit states on the basis of different voltage levels on the data transmission line. In contrast, the second specific station has means which, during the reception of data, identify the two possible bit states on the basis of the presence or absence of a specific current flow via the data transmission line. Furthermore, in another device for the serial exchange of data between two stations, suitable selection of resistors ensures that four different voltage levels are produced on the data transmission line when each station transmits a '1' bit state or a '0' bit state. The voltage levels are evaluated differently by the stations, with the result that simultaneous data transmission in both directions is also possible.

Device for the serial exchange of data between two stations

Growing community of inventors

Ditzingen, Germany

Martin Wagener