A transmission device comprising: a controller configured to select one of a first operation mode and a second operation mode, wherein in the first operation mode data are transmitted by means of a differential signal and in the second operation mode data are transmitted by means of a three phase signal; a first selector configured to select one of a first signal and a second signal, and output the selected one of the first signal and the second signal, wherein the first selector selects the first signal in the second operation mode; a second selector configured to select one of an inversion signal of the first signal, the second signal and an inversion signal of the second signal, and output the selected one of the inversion signal of the first signal, the second signal and the inversion signal of the second signal, wherein the second selector selects the second signal in the second operation mode; a first driver configured to set, based on the output signal of the first selector and a first control signal, a voltage of a first output terminal (Tout1) to one of a first voltage, a second voltage and a third voltage; a second driver configured to set, based on the output signal of the second selector and a second control signal, a voltage of a second output terminal (Tout2) to one of the first voltage, the second voltage and the third voltage, wherein in the first operation mode, the first driver and the second driver set the respective voltages to one of the first and the second voltage such that they are different from each other, thereby constituting a differential signal; and a third driver configured to set, based on a third signal and a third control signal, a voltage of a third output terminal (Tout3) to one of the first voltage, the second voltage and the third voltage, wherein in the second operation mode, the first driver, the second driver and the third driver set the respective voltages to one of the first, the second and the third voltage such that they are different from each other, thereby constituting a three-phase signal. a controller configured to select one of a first operation mode and a second operation mode, wherein in the first operation mode data are transmitted by means of a differential signal and in the second operation mode data are transmitted by means of a three phase signal; a first selector configured to select one of a first signal and a second signal, and output the selected one of the first signal and the second signal, wherein the first selector selects the first signal in the second operation mode; a second selector configured to select one of an inversion signal of the first signal, the second signal and an inversion signal of the second signal, and output the selected one of the inversion signal of the first signal, the second signal and the inversion signal of the second signal, wherein the second selector selects the second signal in the second operation mode; a first driver configured to set, based on the output signal of the first selector and a first control signal, a voltage of a first output terminal (Tout1) to one of a first voltage, a second voltage and a third voltage; a second driver configured to set, based on the output signal of the second selector and a second control signal, a voltage of a second output terminal (Tout2) to one of the first voltage, the second voltage and the third voltage, wherein in the first operation mode, the first driver and the second driver set the respective voltages to one of the first and the second voltage such that they are different from each other, thereby constituting a differential signal; and a third driver configured to set, based on a third signal and a third control signal, a voltage of a third output terminal (Tout3) to one of the first voltage, the second voltage and the third voltage, wherein in the second operation mode, the first driver, the second driver and the third driver set the respective voltages to one of the first, the second and the third voltage such that they are different from each other, thereby constituting a three-phase signal.