| 摘要 |
PURPOSE:To close the interruption mask of an opposite processor in case of the occurrence of a fault in a processor, and to securely prevent the program looping of the processor, by adding an interruption request signal monitoring part to the processor. CONSTITUTION:Processors 1 and 2 constitute a data processing system, and they normally perform processing independently and allows interruption processing between them at need. The processor 2 which receives an interruption request signal from the processor 1 is provided with an interruption request signal monitoring part 4, an interruption request processing program 3, and an interruption control part 5. The interruption request signal is sent through an interruption request signal line and analyzed by the control part 5 and when the interruption mask of the control part 5 is opened, the program 3 is started. In the monitoring part 4, the ceasing of the request signal is stored without reference to the execution of the program 3 to monitor the time difference from monitoring indication from the program 3, and if the processor 1 breaks down to send the request signal continuously, an alarm is sent to the program 3 to close the mask of the control part 5, thus preventing the program looping of interruption processing. |
