| 摘要 |
<p>PROBLEM TO BE SOLVED: To attain a technology for applying a general purpose technology, while securing reliability of data.SOLUTION: First and second CPUs 11 and 12 generate a data body and a CRC of a wrong detection code in accordance with a state of an external device 90 to be input from an input/output unit 17, transmissions of the first CPU 11 and the second CPU 12 are synchronized with each other and the first CPU 11 outputs only the generated data body to a communication controller 10 via a change-over part 40. In this case, the second CPU 12 functions as a slave with the first CPU 11 as a master. When the transmission of the data body is completed, the first and second CPUs 11 and 12 change over a function between the master and the slave. Then, the second CPU 12 of the master outputs only the generated CRC to the communication controller 10 via the change-over part 40. In this case, the first CPU 11 functions as the slave with the second CPU 12 as the master.</p> |
