说明：  一款AD9850的DDS模块功能说明，当初买产品的时候送的，很全面，对初用DDS的同志很有帮助，内附DDS与C51单片机的接口电路及KEIL原代码，根据说明，下载程序即可。
(AD9850 a description of the DDS module, was to buy time for delivery products, it is a comprehensive, early use of the helpful comrade DDS, DDS with C51 single-chip containing the interface circuit and KEIL the original code, in accordance with that download procedures.)