此为当前流行的STC单片机开发下载简单模式，现在都是利用断电模式下载单片机程序，你可以把这段代码加进去以后实现，不用断电下载模式，为你开发节省了很多宝贵的时间。-This is the current popular STC MCU Development Download simple patterns, are now using the power-off mode SCM procedures, you can put the code into the future, no power off download mode, develop for you save a lot of valuable time.