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ADAU1461 TDM problem

Hi. I have a custom prototype PCB with ADAU1461. Running in slave 8ch TDM

However I cannout get an output on the TDM SDO pin. Its always HIGH for bits 32-8 and LOW for 7-0 in the TDM slot.

See attached  DSP.JPG

my MCLK is 12.288mhz So I am using the PLL x4.

My Project even has a Fixed DC signal on one of the TDM slots  to see if the Problem is receiving or sending. and yet still no output.

Project attached.

Also attached is a DUMP of the Config registers unless I am missing something and surely I must be, They look ok to me.

I could really do with some help on this. I have run out of Ideas.

Thanks

Brett

attachments.zip
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  • Hi Guys

    I still cannot get any output on the TDM.

    I readback all the Config Program Data registers and they are all correct.

    I readback all the Param Ram registers 32. bytes. These are Not the same as what is Loaded at default. why is this? Do these change once DSP is running.As I am not making any changes.

    I created a new project with nothing on the schematic page but 8 TDM in direct to 8 TDM out.

    The same result?

    help please.

Reply
  • Hi Guys

    I still cannot get any output on the TDM.

    I readback all the Config Program Data registers and they are all correct.

    I readback all the Param Ram registers 32. bytes. These are Not the same as what is Loaded at default. why is this? Do these change once DSP is running.As I am not making any changes.

    I created a new project with nothing on the schematic page but 8 TDM in direct to 8 TDM out.

    The same result?

    help please.

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