世纪民生公司的带网络功能的单片机cs6209的用户手册，我费了很大力气才从得到的。用cs6209开发带网络功能的单片机应用很方便。-Myson Century' s single-chip microcomputer with network function cs6209 user manual, I had made diligent efforts from the get. Cs6209 development zone