基于单片机的交通灯设计论文.doc

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he traditional control detection update. In real-time detection and automatic control of the application system, the microcontroller is often used as a core ponent, according to the specific characteristics of the application object, with other devices to improve.
Crossroads shuttle vehicles, pedestrians bustling, car lanes, walkways, everything in good order and well arranged. So what to achieve traffic in order? Rely on the automatic mand system of traffic signal lamp, traffic in order to achieve. Many traffic lights control. The system uses the United States ATMEL pany AT89S51 microcontroller, as well as other chips to design traffic light control. Achieved through the AT89S51 chip P1 port set red, green light function, through the AT89S51 chip R*D, T*D input, output display time. The light of the traffic light is realized by the light emitting diode, and the display of the time is realized by seven sections of digital tubes. DC power supply used in single chip microputer system. In order to ensure the stability and reliability of the system, the system integrates the watchdog chip, to avoid the system because of the crash and stop working. The system has strong practicability, simple operation and good e*pansibility.
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目 录
1引言1
2 交通管理方案论证1
设计任务1
方案介绍2
3 交通灯系统硬件设计4
单片机概述4
系统构成5

AT89S51芯片5
74HC164芯片介绍7
74LS04