I am trying to get the AD2S1210 working in a project. I am able to power it up and see the excitation at the default 10Khz. I have a microprocessor that I've got running to program the ADS1210. When that microprocessor is not connected to the AD2S1210 it seems to run fine. When it's connected to the AD2S1210, I don't ever see the data bits changing (I've got it running in parallel mode; DB7-DB0 just sit at zero). I have CS tied to ground on the AD2S1210. A0 and A1 are set at 1 to put it in configuration mode. Is there another enable or something else I need to do in software? I'm wondering if the data bits are in high impedance mode because I've missed something.