| 摘要 |
PURPOSE:To prevent a periodic processing from being interfered by an irregular processing, by executing the irregular processing and the periodic processing continuously when an interrupt signal requesting the irregular processing is accepted . CONSTITUTION:An interrupt signal IR1 sent irregularly from a keyboard 1 and an interrupt signal IR2 sent periodically from a display 2 are accepted through a common interrupt request line 4 by an interrupt control part 5 of a processor 3. When the interrupt control part 5 discriminates that the transmission source of the accepted interrupt signal IR1 is the keyboard 1, the interrupt control part 5 starts a branching part 61 added to a key operating part 6. The branching part 61 starts a display part 7 and connects a returning part 71 added to the display part 7 to the key operating part 6. After executing the processing such as transmission of display update data, the display part 7 starts the key operating part 6 to execute a processing corresponding to the interrupt signal IR1. After this processing is completed, the connection between the returning part 71 and the key operating part 6 is released. |
