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CAF memory size optimization ?

Other Parts Discussed in Thread: CC2564

Dear Team,

Is there any room to optimize CAF(Connected Audio Framework) memory size further?

I'm promoting C5535 for USB/BT speaker with CC2564, but the problem is memory size.

We are expecting we need 400KB memory to run BT stack and CAF, but the internal memory size of C5535 is just 320KB.

So, I would like to seek your idea how these SW can run on C5535 concurrently, and to check if memory size of CAF can be optimized further. 

* Should  ASRC be required  for USB playback scenario? or is this optional?

* Is it possible to optimize CAF memory size further?

* Is there any method to utilize external memory like SPI flash?

* Is there any 3rd party who implemented efficient USB audio framework on C5535?

Thanks and Best Regards,

SI.