LED显示 STC89LE52AD、54AD、58AD、516AD这几款89系列的STC单片机内部自带有8路8位的AD转换器，分布在P1口的8位上，当时钟在40MHz以下时，每17个机器周期可完成一次AD转换。-LED display STC89LE52AD, 54AD, 58AD, 516AD that several STC series single-chip 89 comes with 8 internal 8-bit AD converter, located in 8 populat