【正文】 must be taken. May believe that it is with the system engineering viewpoint and the method, how studies in the mechanical and electrical system and the product the machinery, the puter, the information processing and the automatic control technology synthesis application, in order to the mechanical and electrical system and the product achieves the best bination. What the integration of machinery product needs is the embedded microputer, but the monolithic integrated circuit has the volume to be small, the integration rate is high, function strong and so on characteristics, is suitable for the embedded application. The smart instrument, the domestic electric appliances, the numericallycontrolled machine tool, the industrial control and so on the electromechanical device and the product uses the monolithic integrated circuit unexpectedly. In the present case, monolithic integrated circuit39。s year demand has also surpassed hundred million piece of quantities, this indicated that the 5 monolithic integrated circuit has the broad application prospect. This curriculum mainly aims at the present our country early time application quite widespread “MCS51” the monolithic integrated circuit to carry on system39。 The profile transformation and the wave shaping electric circuit uses for signal conversion Cheng Ke who and the monolithic integrated circuit connection TTL signal will enlarge。s mouth line and the periphery ponent, simultaneously also simplified the demonstration part software programming. the system software including the monolithic integrated circuit and the liquid crystal module39。s choice situations. For the convenience putation must demonstrate data value Duan Ma, may transform again it the pression the BCD code, then in the data value which is going to demonstrate through the table lookup each pression BCD code transforms 8 sections of codes to deliver the demonstration buffer, finally passes through the serial port to deliver to the liquid crystal display module demonstrated measured speed or course. When design, should the overall evaluation measure the fast precisi。s signal impulse width (sensor transforms vehicle speed corresponding width signal impulse) realtime to survey, then calculates the speed and the course through the monolithic integrated circuit, again the obtained data storage to the serial port datacarrier storage, and will measure the speed by the serial port liquid crystal display module real time display. This design controls the demonstration speed or the course with two pressed keys. Considers the signal influences and so on weaken, disturbance, before the signal sends in the monolithic integrated circuit to deal with it to carry on the enlargement reshaping, then inputs again to the monolithic integrated circuit carries on measures fast. Monolithic integrated circuit determines input signal after the 7 timer T0 control function the cycle, again using monolithic integrated circuit39。s establishment to carry on the control to the internal timer T0 work, like this can the preci