Abstract: A method is disclosed for the operation of a data processing system for motor vehicles including at least two computers and a line connecting the computers for the transmission of messages. This line permits a fast and reliable data transmission between the computers installed in the motor vehicle, taking into account the specific requirements of a controller-coupling in the motor vehicle. An embodiment is provided which describes in detail the interface between the individual computers and the line linking the computers, and with the aid of which a controller-coupling is realized in the vehicle.

Abstract: The invention is directed to a method of handling erroneous messages in a data processing arrangement. The data processing arrangement can be applied to a motor vehicle and includes at least two stations such as a motor control computer, a transmission control computer, and/or a brake control computer. A data line connects the two stations for transmitting messages. The method is performed by causing the station which detected the erroneous message to transmit an error report in response to the erroneous message; and, causing the error report to include a sequence of states or bits which cannot be confused with any sequence of dominant states or bits during error-free data transmission.

Abstract: A method is disclosed for the operation of a data processing system for motor vehicles including at least two computers and a line connecting the computers for the transmission of messages. This line permits a fast and reliable data transmission between the computers installed in the motor vehicle, taking into account the specific requirements of a controller-coupling in the motor vehicle. An embodiment is provided which describes in detail the interface between the individual computers and the line linking the computers, and with the aid of which a controller-coupling is realized in the vehicle.

Abstract: The invention is directed to a method for structuring messages for the exchange of data and/or for the synchronization of processes in data processing systems. A message includes at least elements with respect to start (start-bit, SOF), identification (also called identifier) and data with one bit field (IDE-field, IDE-bit) having at least one bit for characterizing the length of the identifier.

Abstract: A method is disclosed for the operation of a data processing system for motor vehicles including at least two computers and a line connecting the computers for the transmission of messages. This line permits a fast and reliable data transmission between the computers installed in the motor vehicle, taking into account the specific requirements of a controller-coupling in the motor vehicle. An embodiment is provided which describes in detail the interface between the individual computers and the line linking the computers, and with the aid of which a controller-coupling is realized in the vehicle.

Abstract: An activation device for bringing an network interface of a computer network for a motor vehicle, with at least two bus lines, out of a sleep mode into a wake-up mode. The activation device includes a signal flank change detection circuit, which is coupled to the bus lines and a reference voltage. In the event of an interruption or in the event of a short-circuit of one of the bus lines to ground or to a supply voltage of the computer network, the circuit evaluates a signal arriving on the other, intact bus line and emits a wake-up signal for the activation of the network interface. The flank change detection circuit has two comparators (5, 7), which are connected to the bus lines (U-, U+) and via a voltage divider (19) to a reference voltage (V.sub.cc /2). A voltage offset is produced by the voltage divider (19), by which offset the network interface can be brought into wake-up mode in the event of a short-circuit of the bus lines between each other, even if it was in sleep mode when the fault occurred.

Abstract: A process for the localization of defective stations in local networks which consist of several locally distributedly operating stations is proposed, particularly for use in automobiles. The process is characterized by station-internal, statistical evaluation of external and/or internal error signals. The redundancy necessary for a self-monitoring of the stations interconnected by a serial bus need not be available locally in the respective station, rather only the redundancy existing in any case in a network due to the presence of protocol-compatible stations is utilized.

Abstract: A device for potential-free transmission of dominant and recessive data bits in a bus system operating with bit-by-bit arbitration includes a series connection of a modulator, a galvanic separation circuit, and a demodulator. Data bits to be transmitted are scanned in the modulator at equidistant time intervals and are divided into two intermediate trains of data bits wherein the dominant bits alternate with the recessive bits. The two intermediate trains are applied to two input terminals of a galvanic separating device, and a demodulation is effected on the output side of the separating device.

Abstract: A method is disclosed for the operation of a data processing system for motor vehicles including at least two computers and a line connecting the computers for the transmission of messages. This line permits a fast and reliable data transmission between the computers installed in the motor vehicle, taking into account the specific requirements of a controller-coupling in the motor vehicle. An embodiment is provided which describes in detail the interface between the individual computers and the line linking the computers, and with the aid of which a controller-coupling is realized in the vehicle.