Switching device for switching the operating voltage for a microprocessor circuit on and off

摘要

A switching device is proposed by means of which the operating voltage (UB) for a microprocessor circuit (32) can be switched on and off. A first sensor circuit (S1) is provided for switching on and off. This first sensor circuit (S1) causes switching off to occur in the event of the operating voltage being switched off deliberately only if further sensor circuits (S2...Sn) have confirmed in conjunction with a logic circuit (LS) that no criteria are present which indicate that the switching off is not permissible. <IMAGE>