| 摘要 |
The invention relates to a microcontroller (MC) which can be coupled to an execution unit (EU). For the operation of the microcontroller (MC), a program (PR) in the microcontroller (MC) generates a message (MSG) as a function of input data (S_1, S_2) and transmits said message (MSG) to the execution unit (EU). For the operation of the microcontroller (MC), accompanying the message (MSG), a check code (CV) is generated as a function of the execution of the program (PR) and is transmitted to the execution unit (EU). For the operation of the execution unit (EU), a test determines whether the check code (CV) is logically predefined and/or received within a predetermined time interval (T_INT), wherein in the case of a positive test result, the message (MSG) is designated as valid, and in the case of a negative result, the message (MSG) is designated as invalid.
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