利用单片机设计交通灯控制系统，能显示状态倒计时：红灯50秒，绿灯80秒，黄灯3秒，能利用本机键盘重新设置各个状态（相位）时间；-The use of single-chip design traffic light control system that can display the status Countdown: red 50 seconds, 80 seconds green, yellow 3 seconds and can use the keyboard to reset the