| 摘要 |
PURPOSE:To improve reliability in the dam various quantiy processor of the function distributed multimicrocomputer system, by providing timer circuits in plural processing modules to back up them automatically. CONSTITUTION:Timer circuit 18 is provided in processing module 12, and timer circuit 19 for backup is provided in processing module 13 also. Timer registers 18 in respective modules are normally updated by the time signal from timer circuit 18 incorporated in module 12. When module 12 becomes faulty, timer circuit 18 is switched to timer circuit 19 in module 13 automatically, and time registers 18 in respective modules are updated by the time signal from timer circuit 19 after that. Thus, since the system is not stopped even if module 12 is faulty, reliability of the processor can be improved. |
