Abstract: A microprocessor system (50) for controlling or regulating at least partly safety-critical processes, comprising two central processing units (1, 2) integrated in a chip housing, a first and a second bus system, at least one full memory (7) on the first bus system, at least one test data store (51) on the second bus system, which has a reduced store coverage compared to the full memory on the first bus system and in which test data are stored which are connected to data of the memory (7) on the first bus system, and the bus systems comprise comparison and/or driver components which allow the data interchange and/or comparison of data between the two bus systems, and a hardware test data generator (4) is arranged at least on the second bus system, in which case at least part of the full memory on the first bus is additionally backed up using another test data store (5) and test data on the first bus. The invention further relates to the use of the above microprocessor system in motor vehicle controllers.

Abstract: The invention relates to a microprocessor system (60) for controlling and/or regulating at least partly security-critical processes, which system comprises two central processing units (1, 2) integrated into a chip housing, a first and a second at least one complete memory (7) on the first bus system, and check data in one or more check data memories, said data being related to data of the memory in the first bus system. The check data memory is smaller than the complete memory. The bus systems comprise comparative and/or driver components which facilitate data exchange and/or comparison of data between the two bus systems. The one or more check data memories are arranged on the first bus system. On the second bus system, neither a check data memory nor a memory safeguarding data of the memory on the first bus is used. The invention also relates to the use of the inventive microprocessor system in automotive control devices.