单片机交通灯专业课程设计

目 录一 引 言-------------------------------------------------------------------------------------------------------------1二 设计任务和要求----------------------------------------------------------------------------------------------------12.1 设计任务-------------------------------------------------------------------------------------------------------12.2 设计要求-------------------------------------------------------------------------------------------------------1三 方案总体设计-------------------------------------------------------------------------------------------------------23.1 显示时间方案选择-------------------------------------------------------------------------------------------23.2 总体设计-------------------------------------------------------------------------------------------------------23.3 总体设计--------------------------------------------------------------------------------------------------------2四 硬件设计-------------------------------------------------------------------------------------------------------------44.1 单片机最小系统----------------------------------------------------------------------------------------------44.1.1 STC89C52 单片机特征参数-------------------------------------------------------------------------44.1.2 STC89C52RC 关键引脚功效-------------------------------------------------------------------------44.1.3 STC89C52RC 中止源----------------------------------------------------------------------------------54.1.4 时钟电路----------------------------------------------------------------------------------------------54.1.5 复位电路----------------------------------------------------------------------------------------------64.2 数码换显示电路----------------------------------------------------------------------------------------------64.3 红绿灯显示电路----------------------------------------------------------------------------------------------84.4 整体电路-----------------------------------...