Abstract: A circuit for monitoring an output voltage of a voltage supply is shown. The circuit comprises a microcontroller for controlling a system, a shift register and a diagnostic circuit. The microcontroller has an input for receiving serial output data of the shift register, wherein the input is connected to the serial output of the shift register. The diagnostic circuit is designed to diagnose the voltage supply and has a diagnostic output which is connected to a data input of the shift register for inputting a diagnostic bit.

Abstract: A system having a first data processing unit and a second data processing unit, wherein the first data processing unit has a first communication interface and the second data processing unit has a second communication interface, and the first communication interface and the second communication interface are connected by means of a signal line, and a monitoring unit, which is set up and provided for the purpose of resetting the first data processing unit and/or the second data processing unit to a defined operational state by means of a reset signal. The monitoring unit is connected to the signal line and provided to monitor a signal, which signals a phase of data transmission between the first communication interface and the second communication interface using a predetermined voltage level of the signal.

Abstract: The present invention relates to a security arrangement comprising a data processing unit for serial transmission of data for controlling outputs and for querying inputs of a process and a corresponding method; further comprising at least one parallel-to-serial converter comprising a shift register for converting data to query the inputs; at least one serial-to-parallel converter comprising a shift register for converting data to control the outputs; wherein the data to be transmitted includes diagnostic bits that are output from the serial-to-parallel converter and read back from the parallel-to-serial converter; and the read-back data is checked for errors by the data processing unit to ensure a secure data transmission.

Abstract: A circuit for monitoring an output voltage of a voltage supply is shown. The circuit comprises a microcontroller for controlling a system, a shift register and a diagnostic circuit. The microcontroller has an input for receiving serial output data of the shift register, wherein the input is connected to the serial output of the shift register. The diagnostic circuit is designed to diagnose the voltage supply and has a diagnostic output which is connected to a data input of the shift register for inputting a diagnostic bit.

Abstract: A system having a first data processing unit and a second data processing unit, wherein the first data processing unit has a first communication interface and the second data processing unit has a second communication interface, and the first communication interface and the second communication interface are connected by means of a signal line, and a monitoring unit, which is set up and provided for the purpose of resetting the first data processing unit and/or the second data processing unit to a defined operational state by means of a reset signal. The monitoring unit is connected to the signal line and provided to monitor a signal, which signals a phase of data transmission between the first communication interface and the second communication interface using a predetermined voltage level of the signal.

Abstract: The present invention relates to a security arrangement comprising a data processing unit for serial transmission of data for controlling outputs and for querying inputs of a process and a corresponding method; further comprising at least one parallel-to-serial converter comprising a shift register for converting data to query the inputs; at least one serial-to-parallel converter comprising a shift register for converting data to control the outputs; wherein the data to be transmitted includes diagnostic bits that are output from the serial-to-parallel converter and read back from the parallel-to-serial converter; and the read-back data is checked for errors by the data processing unit to ensure a secure data transmission.