单片机交通灯课程设计

目录一引言------------------------------------------------------------------------------------------------------------------1二设计任务与要求 --------------------------------------------------------------------------------------------------------12.1 设计任务 -----------------------------------------------------------------------------------------------------------12.2 设计要求 -----------------------------------------------------------------------------------------------------------1三方案总体设计 -----------------------------------------------------------------------------------------------------------23.1 显示时间方案的选择--------------------------------------------------------------------------------------------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 单片机特性参数 ---------------------------------------------------------------------------44.1.2 STC89C52RC 主要引脚功能 ---------------------------------------------------------------------------44.1.3 STC89C52RC 的中断源----------------------------------------------------------------------------------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 ----------------------------------------------------------------------...