Method for monitoring at least two microcontrollers

A circuit arrangement comprising:

• a first microcontroller;
• a watchdog allocated to the first microcontroller;
• and
• at least one second microcontroller connected to the first microcontroller,
• wherein the circuit arrangement is configured to execute a method for monitoring at least the first microcontroller and the at least one second microcontroller,
• wherein the method includes
• allocating the watchdog to the first microcontroller,
• monitoring a communication of a message of the first microcontroller within a time interval having a predetermined duration, wherein the message communicated to the watchdog by the first microcontroller contains a contribution which is formed as a consequence of a communication between the first microcontroller and the at least one second microcontroller, and
• checking the correct method of operation of the at least one second microcontroller with the watchdog on the basis of the contribution.

A battery comprising:

• a battery management unit including a circuit arrangement,
• wherein the circuit arrangement includes a first microcontroller, a watchdog allocated to the first microcontroller, and at least one second microcontroller connected to the first microcontroller,
• wherein the circuit arrangement is configured to execute a method for monitoring at least the first microcontroller and the at least one second microcontroller, and
• wherein the method includes
• allocating the watchdog to the first microcontroller,
• monitoring a communication of a message of the first microcontroller within a time interval having a predetermined duration, wherein the message communicated to the watchdog by the first microcontroller contains a contribution which is formed as a consequence of a communication between the first microcontroller and the at least one second microcontroller, and
• checking the correct method of operation of the at least one second microcontroller with the watchdog on the basis of the contribution.