【正文】 and elevator operation, to determine whether the response of each layer of the call ( elevator only in response to the same direction, finally call ) is floor display part, this design is through a delay circuit to display the location of the elevator. The software design includes the following sections: The initialization procedure so that the digital display 1 indicates that the elevator in a building, and the L3 light that elevator door etc. Others entered the elevator。 S15: Elevator internal selection to the five floor button, the button is pressed said elevator passengers going to the five floor, SCM according to the signal control elevator。 S13: the elevator to the third floor internal selection button, the button is pressed said elevator passengers to go to the third floor, SCM according to the signal control elevator。 S11: Elevator internal selection to a floor button, the button is pressed said elevator passengers going to the first floor, SCM according to the signal to control the operation of the lift。 S9: five floor down the call button, the button is pressed five floor elevator ride down to single chip, and the signal into a fixed unit, wait to judge whether the response to this call the elevator to the floor。 S7 : four buildings down the call button, the button is pressed four floor elevator ride down to single chip, and the signal into a fixed unit, wait to judge whether the response to this call the elevator to the floor。 S5: the third floor down the call button, the button press said the third floor has take the elevator downstairs to SCM, and the signal into a fixed unit, wait to judge whether the response to this call the elevator to the floor。 S3 : two buildings down the call button, the button press said the two floor elevator ride down to single chip, and the signal into a fixed unit, wait to judge whether the response to this call the elevator to the floor。 外文翻譯 頻率合成器設計 系 別： 電子與電氣工程系 年級專業(yè)： 2021 級電子信息工程（專升本） 姓 名： 學 號： 125031108 題目名稱： 頻率合成器 設計 指導老師評語： 指導老師簽名： 年 月 日 1 外文翻譯 The elevator controller based on Singlechip microputer Abstract: the design is based on singlechip microputer to control the use of the appliance, the use of digital tube to display the position and direction of the floor, using two LEDs to replace the motor, to achieve the motor positive inversion by singlechip microputer to control the LED on and off, to check the position of the elevator through the timer delay. Keywords: Elevator AT89S51 LED motor control floor check 1 Introduction With the rapid development of the continuous improvement of living standards and the national economy. Each big city buildings in continuously to the highlevel development. Therefore lift play a decisive role in our life. The elevator is not only the important equipment for the production process, it is a transportation equipment by the people with freq