| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a microcontroller capable of improving processing performance as a whole by making a plurality of CPUs execute mutually different programs, and detecting abnormality by evaluating results of executing the same processing by the plurality of CPUs about a processing whose safety is required. <P>SOLUTION: The microcontroller includes a plurality of processing systems configured of CPU (1, 4) and memories, wherein data to be output by the CPU for each processing system are separately compressed by compressors (7, 8) for each CPU, and stored, and the compressed storage data are compared by a comparator (9), and the abnormality of processing is detectable according to the mismatching of the comparison result. Even when timings in which the plurality of CPU obtain the same processing results by asynchronously executing the same processing are different, both the processing results can be easily compared by compressing the data by the compressors. Also, since the comparison of the comparator is made valid by giving comparison permission from all the CPU, it is possible to obtain the comparing operation result by using the timing in which the comparison result by the plurality of compressors is determined as a reference. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
