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ADAU1701 I2S Interface MCLK Issue

SigmaDSP & SigmaStudio paul.wu May 9, 2013 00:00 2 replies Original on forum ↗
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paul.wu Question
May 9, 2013 00:00

I am design one Bluetooth audio system. I want to use Bluetooth I2S interface to connect ADAU1701 I2S interface. But Bluetooth MCLK output only 12MHz and can't change MCLK freuqency. May I to use ADAU1701 to finish this product ? Thank you.

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adau1701

ADIApproved Reply
May 9, 2013 00:00

Yes, you can use a 12 MHz master clock, but this means your system sample rate will be (12/12.288)*48 = 46.875 kHz. You'll need to set the sample rate of your project to 46.875 kHz manually using the method described in this FAQ: https://ez.analog.com/docs/DOC-1431

paul.wu Reply
May 10, 2013 00:00

Thank you for your help. I understand it. Thank you.