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SPI Interface

Question asked by samiller on Nov 7, 2013
Latest reply on Nov 12, 2013 by samiller

I am trying to talk to the AD9361 demo board thru the SPI port but I get no output from the DO pin.  From the documentation

on power up I should be able to send continuous clocks on the SPI clock line and see register 0 output start on the 17th clock.

I have the enable pin always low.  I am connected with a ZEDBoard thru the FMC connector with the interface voltage set to 1.8v.

I can see the SPI clocks at the terminating resistor on the demo board.  Looking at the SPI output it is always is in the Hi Z state. 

Is there something that I need to enable to get this interface to work?