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TDM between AD1401 and AD1940 eval boards revisited

Question asked by KJBob on Nov 5, 2013
Latest reply on Dec 4, 2013 by KJBob

     Hello,

 

     Sorry I had marked my previous post http://ez.analog.com/message/117014#117014

as assumed answered by mistake, but I would appreciate help with this.

 

     I've been able to send I2S stereo audio from a AD1401 eval board to a AD1940d board by connecting them as described in

http://ez.analog.com/thread/35830

 

     Now I'd like to try sending  TDM audio across the same interface, but cannot make it work.  As far as I can tell, the wiring between the boards as well as the boards' jumper settings remain the same for I2S and TDM.  After setting both chips' register controls for TDM, I find that the -1401 board is not sending any data to the -1940 board.

 

     I attached the project file for each board:

 

          1401 -- Two channels of analog in, straight to two used channels (out of eight) TDM

          1940 -- TDM in, two channels out to analog

 

 

     I'm hoping someone could look at the register settings therein and see what's wrong.

 

 

     Bob

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