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CODEC MCLK synchronization

Question asked by HaiN on Nov 29, 2011
Latest reply on Dec 21, 2011 by PrasanthR

Hi everyone,

 

Our CODEC IC has two Digital Audio Interfaces.  One interface is connected to the ARM processor, and the other one is connected to the BF547 DSP's SPORT port.  The DSP runs on a 13MHz oscillator and the CODEC & ARM run on a separate 12 MHz oscillator.

 

How do I synchronize the CODEC’s MCLK to DSP when the CODEC is in either master or slave mode?

 

If the DSP does not require common “MCLK” with the CODEC, how does it deal with the clock drift between the two ICs to prevent skipped or repeating sample?

 

Best regards,

Hai

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