Patent ID: 7243036

Claim:
A system having at least one microcontroller unit and having at least one transmitting/receiving module which has at least one clock generator unit, in particular at least one oscillator unit, where the microcontroller unit and the transmitting/receiving module are connected to one another for communication over at least one data line, characterized in that in order to calibrate the clock frequency of the clock generator unit at least one calibration unit is assigned to the clock generator unit, the calibration unit can be set in binary terms by means of at least one command signal via the data line, the clock generator unit is assigned at least one binary counter that is clocked by the clock generator unit, in particular by the output frequency of the clock generator unit and within the transmitting/receiving module there is at least one control logic mechanism which is connected to the calibration unit or to the binary counter, which control logic mechanism, following reception of the command signal, resets the binary counter, start it and awaits the expiry or overflow of the binary counter.