I can not program ADN2905 as PRBS detector. I tried to write value 0x04 ( detector enable, and PRBS 7 ) into register 0x3F and it is not possible. Register it stays always with 0 value.
According datasheet, ( http://www.analog.com/media/en/technical-documentation/data-sheets/ADN2905.pdf ) I just need to write on register 0x3F in order to program as PRBS detector but there is not way of writing there.
Is there any special order to configure ADN2905 as PRBS detector ?
Thanks for your help