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CC8520 No Digital Audio Output

James Benson
Prodigy 10 points
Other Parts Discussed in Thread: PCM5242, CC8520

Hi,

I have a very simple mono-microphone to mono-output project. The two units are pairing with each other but I am not getting any digital audio output from the consumer even though digital audio is apparent on the input pin of the producer.

  • The digital input pin on the producer and output pin of the consumer appear to be correctly assigned. (AD1 in both cases)
  • The logical channels are set to the same values. (Microphone 0)
  • The I2s audio streams are also correctly assigned. (Left)
  • The consumer cc8520 is producing the appropriate clocks and is communicating via I2C successfully with the DAC (PCM5242).
  • All devices are set to 48khz, 24bit.
  • I have tried both up-stream and down-stream configurations by swapping the master-slave relationship.

I've tried every combination of everything I can think off to no avail!

I cannot be sure whether the digital audio is being transmitted, the problem could be with either cc8520s.

Any assistance would be greatly appreciated!

James