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Problems with ADAU1701 in TDM Mode

Question asked by Robin on Mar 17, 2010
Latest reply on Mar 19, 2010 by JeradL
Hi there,

I am using in a new project the ADAU1701 together with an external 6/8ch CODEC in TDM mode..
Everything's seems to work fine, but I cannot get any signal on MP6 (TDM 8ch out). The output BCLK is fine (set to 12.288 MHz) and output LRCLK (48 kHz) is present as well, but no data signal.

Here are the conditions:

- Sampling Rate: 48 kHz
- SCKI: 24.576 MHz (= 512x fs) from external oscillator (PLL0 and PLL1 set to "high")
- Serial Output set to "Master" and "TDM enable" activated. MP's set properly for TDM mode-
- Signal input is in "TDM" mode as well. In this caes the ADC of the CODEC is "master", the DAC's are slave.

Is there any required setting in the registry that I missed? Or can the ADAU1701 not handle "TDM" mode with 
SCKI = 512 x fs (24.576MHz)?


Any help is highly aprreciated.

 

Regards,

Robin


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