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Part Number: TLV320AIC3120EVM-U
I have a test set up where an External MCU programs the Eval codec, where I receive audio from the headphones port and through the i2s (which is sent over the usb to the computer). Works great. I tried to use this same setup but with battery power and no USB connections, but I no longer get audio out of the headphones. Does the eval board require a USB connection to operate? Or does the I2S stall the system waiting for the USB controller MCU to request data?
Regards,Collin WellsPrecision ADC Applications
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In reply to Collin Wells:
In reply to Jacob Handy:
In reply to Steve-Wilson:
I'm very sorry for the confusion. I receive audio input from a microphone connected to the codec. I then process the audio and output it to both the, I2S to the PC, and to the Headphone amp output of the codec.
So when I tried a battery set up I was hoping that the headphone output would still provide audio output, but it doesn't. The MCLK is still active so I would have thought that the codec would have continued to process and output audio on the headphones, while the I2S channel was waiting for the master I2S to request data (in this case the I2S would wait indefinitely because there is no host to request audio data).
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