这是我们自己找到的一个单片机开发板，它是STC51的比89C51有更多的功能，自带A/D转换，里面资料齐全，原理图，实物图都有-This is our own to find a microcontroller development board, which is STC51 more than 89C51 functions, bring their own A/D conversion, which information is available, schematics, physica