A method for transmitting a data transfer block, the data transfer block comprising at least one data segment having a predetermined number of one or more data units, to be identified using validity information, and a header segment, the method including the following steps: a) writing a data unit into a first area of an output register predetermined for the data segment, from which the buffered data transfer block is transmitted via a bus system at a predetermined transmission instant with the aid of a time multiplexing method; b) writing a validity datum, implemented as a toggle bit or as an N-bit counter, into a second area of the output register predetermined for the header segment, the particular validity datum specifying the validity of the corresponding written data unit; c) enabling the data transfer block buffered in the output register for transmission, after the particular data unit and the corresponding validity datum are written into the output register; d) repeating steps (a) through (c) until the predetermined number of the data units and the corresponding validity data are written or the predetermined transmission instant is reached; and e) transmitting the enabled data transfer block buffered in the output register at the transmission instant.