4、AT89C52;单片机;LED数码管27--西安航空职业技术学院毕业设计论文AbstractThispapermainlyexpoundsthe electronicclock basedonAT98C52singlechipmicrocomputer, and displaythedate, timeand "correspondingtotheHELLO^_^ inthedigitaltube". And throughthe4buttons adjustthe year,month,day, time, minutesa