Data processing means

The data processing apparatus comprises a digital data processing unit (12) and a control unit (17). The digital data processing unit having a computation unit (10) calculates the digital data, to transmit and receive commands and the arithmetic unit, the arithmetic unit and the power supply of the power management unit (11) management. The control unit of the user interface unit (20, 21) to achieve a user interface control function. Wherein the control unit commands the transmission state of the computing unit and the transmission between the above-described power management unit monitors, thereby diagnosing operation of said digital data processing unit. Wherein the control unit determines that the work generated in the digital data processing unit in a case where an abnormality, the processing unit resetting the digital data portion or the entirety, irrespective of the operation of said user interface section.