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AD5422 Fault signal question

Question asked by kj.liu on Aug 28, 2015
Latest reply on Oct 14, 2015 by kj.liu

Hi Sir,


There is a problem I don't know is HW or SW problem and how to recover it  , please give a suggest to fix~


       My schematic is as attached , the function is fine but I found my status register always show the 0xFF and data register show 0x04 no matter what the input and output, it makes me confused that my fault pin didn't trigger but the status register also has fault signal.  


       In the mean time, I found the input data I want has wrote into control register successfully and the output also show the number I want.  it looks not reasonable that data register =/ control register but the result in HW is fine.