很适合单片机初学者的书，不仅有51原理，里面有很多单片机设计的例子。-Single-chip is very suitable for beginners book, not only has 51 principles, there are many examples of single-chip design

开发系类智能语音播报的好资料,ISD40语音录放电路及通用开发板的应用-Development Department of the intelligent voice of good data broadcast, ISD4003 voice recording circuit and the application of general-purpose development board

《AT89S51单片机试验及实践教程》用Proteus仿真34例- proteus