| 摘要 |
PURPOSE: A device for removing a noise of a microcomputer is provided to increase a calculation speed and a control speed of a microcomputer by detecting a noise ingredient of input data being supplied from an exterior and connecting a noise detecting unit which generates an interrupt signal for the detected noise ingredient to an input port of each microcomputer, thereby removing a time for detecting a noise of the microcomputer. CONSTITUTION: An input data detecting unit(121) detects the first input data being supplied from an exterior, and generates the first interrupt signal. When the second interrupt signal is generated, the input data detecting unit(121) receives the second input data. A memory(123) is connected to an output side of the input data detecting unit(121) and stores the first interrupt signal generating time in the input data detecting unit(121) and the first input data received in generating the first interrupt signal. When the first interrupt signal is received, a timer(125) is connected to an output side of the input data detecting unit(121) for generating the second interrupt signal after a predetermined time. When the second interrupt signal of the timer(125) is generated, a comparison unit(127) compares the second input data received through the input data detecting unit(121) with the first input data stored in the memory(123). If the second input data are not identified with the first input data, the comparison unit(127) judges the signal as noise and transmits judgement data to a microcomputer.
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