I am trying to generate a sine wave of 80Mhz on channel 1. I am confused about what are the registers need to be written and what to write. Can anyone help into that?
Page 36 of the AD9959 Data Sheet shows the register maps and bit descriptions of the part. This also includes instructions on how to configure each channel. To determine the value of FTW for the 80MHz output frequency, you can compute for it using the formula on Page 18. You can also use the AD9959 evaluation software as a tool to determine the values for FTW or other register words by just setting the Ref Clock frequency that you will be using then input the desired output frequency. Double clicking the input text box will open a dialog box that shows the tuning word values.