说明：  系统由单片机系统、键盘、LED 显示、交通灯演示系统组成。系统包括人行道、左转、右转、以及基本的交通灯的功能。要求系统交通灯的硬件设计，除基本交通灯功能外，还具有倒计时、时间设置、紧急情况处理、分时段调整信号灯的点亮时间以及根据具体情况手动控制等功能。
(SCM system by system, keyboard, LED traffic lights demo system. The system includes sidewalks, turn left, turn right, and the basic function of the traffic lights. System requirements for traffic lights to the hardware design, in addition to the basic functions of traffic lights, but also the countdown, the set-up time, emergency treatment, Time-adjusted lights and the lights of time under the specific circumstances of manual control, and other functions.)