| 摘要 |
PURPOSE:To obtain a micro computer control display device with higher reliability by using the highly reliable data on a memory as they are and clearing, correcting and using the data which are found to be unfair. CONSTITUTION:The device is constituted of a deflection circuit 8, a high voltage generating circuit 9, an analog circuit 13 to use the high voltage of a video circuit 10, and a micro computer digital circuit part 14 (a micro computer 1, a memory 4, a D/A converter 3, etc.,) to control them, and adds a WDT(watch dog timer) 2 to the circuit part 14. When the micro computer 1 stores the data for display control to the memory 4, the data are blocked, and a checking code 6 is added and stored. When the micro computer 1 runs away due to the noise, and when the content of the memory 4 is unfairly rewritten, the highly reliable data on the memory 4 are used as they are, and the data which are found to be unfair are cleared or corrected and used. |
