The invention relates to a semi-conductor component, in particular a semi-conductor component configured to be connected with a bus, in particular a LIN bus system, as well as a process for operating a system module, configured to be connected with a bus, in particular a LIN bus system, which includes emitting a data record and allocated check bits while operating the system module in a first operating mode, such that to operate the system module in a second operating mode, check bits differently generated in comparison with the first operating mode are used.