Abrégé

The invention relates to a method for protecting configuration data from a data bus transceiver (1) that can be operated in a subnetwork mode, wherein the configuration data are provided for comparison with data from data bus messages arriving via a data bus (CAN), wherein a reference checksum for the configuration data is generated and stored, this reference checksum is recurrently checked, and in the event of an alteration being identified, a wake-up signal (WUF) and/or a piece of error information (F) is output. During or after writing of the configuration data to configuration register 2 via data bus SPI or directly before the change to the low-power mode of the electronic control unit, checksum unit 3 is used to form a checksum that is stored in reference checksum register 4.1. In the low-power mode of the electronic control unit, the checksum for the configuration is repeatedly recomputed and compared with the checksum stored in reference checksum register 4.1. Checksum unit 3 stores the recomputed checksum value in checksum register 4.2, and comparison unit 5 then performs a comparison between the data stored in reference checksum register 4.1 and the recomputed checksum stored in reference checksum register 4.2. If the recomputed checksum does not match the stored checksum, then comparison unit 5 is used to trigger a wake-up process on the basis of a configuration error KF. The start of a check can be brought about by internal and/or external triggers.

Classes IPC  ?

• H04L 12/12 - Dispositions pour la connexion ou la déconnexion à distance de sous-stations ou de leur équipement
• H04L 12/40 - Réseaux à ligne bus

Abrégé

The invention relates to a method for transmitting messages in a data bus system, wherein the messages can be transmitted in the form of data frames by means of a data bus (H, L) and a data frame that is to be sent by a bus subscriber is checked for a piece of changeover information (BRS), which method is furthermore distinguished in that changeover of the rise time and/or edge shape of edges of bit pulses of the data frame that is to be sent is performed on the basis of the presence of a defined value of the piece of changeover information (BRS). In addition, the invention relates to a corresponding transceiver and to an electronic control unit.

Classes IPC  ?

• H04L 12/40 - Réseaux à ligne bus