SST单片机实现sip在系统调试和仿真的时候，需要一个从下载过程和仿真过程两个部分切换的BOOTLODER，就是这个东西，官网不提供下载哦（要花钱的）！-SST Singlechip sip debug and simulation in the system, the need for a download process and simulation from the two parts of the process of switching BOOTLODER, is this thing, the official network is not available for download Oh (to spend)!