I am using AD9956 in a simplest way to generate a single frequency. The schematic is show as below.
I configure it with a CPLD. All the inputs are checked through OSC and are OK.
But there are no wave output on pin SYNC_OUT, and the voltage level on Pin5 and Pin6 remain 1.8V.
Could anyone figure out where it may be wrong?
PS: the configuration follows the sample code provided by ADI as attached