I am trying to program an AD9837 EVAL board from SPI port on my ZYNQ dev system. I do not seem to consistently program the part and can sometimes affect a change but never see what I expect. I have not even been able to get the part into reset as shown in the attached scope shot. I also found that the EVAL board comes with jumper LK1 placed and that connects VDD to the CAP/2.5V pin of the AD9837. I am running VDD at 3.3V and am worried that I may have damaged the internal core leading to the SPI issues. I never saw a high current situation and when I remove the jumper I do see 2.5V on the CAP/2.5V pin. I think the SPI timing looks OK and have been slowing it down as well as increasing speed/drive of ZYNQ SPI outputs, but to no avail.
Looking for ideas on how to approach this.