AD9854是美国ADI公司推出的单片DDS芯片，本文从芯片的功能出发，简要介绍了AD9854，以及如何利用单片机驱动DDS。-ADI　s AD9854 is the United States launched the single DDS chip, this chip features from the start, briefly introduced the AD9854, and how to use microcontroller-driven DDS.