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AD1835 don't want to work on 96kHz

Question asked by Afinko on Jan 6, 2010
Latest reply on Jan 7, 2010 by Afinko

Hi,

 

I am trying to run "talkthru analog in-out (asm)" on ADSP-21371 EZ-KIT Lite on 96 kHz, however, without success.

 

When I run the original program, that is configured to work on 48 kHz, it is working properly. I tried also to change "IMCLK Clocking Scaling" by changing the "ADC Control 3" register to use IMCLKx23 and IMCLKx2 (see ad1835.h) and this work OK, I obtained the Fs 24 kHz and 16 kHz.

 

However, when I set the DACCTRL1 register with DACFS96 and ADCCTRL1 register with ADCFS96 the output from DAC is zero. I can physically measure that the LRCLK and BCLK stay at 48kHz and 3.072MHz respectively, and the output is zero.

 

Am I doing something wrong?

 

Best regards,
Afi

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