I have a problem with a new application with ADAU1701 DSP.
I would use both DSP DACs and an external CODEC, but after some tests I have the audio output on the ADAU1701 DACs or on the external CODEC DACs, but not both.
In my system I have an AK4620B CODEC as audio input ADCs and low noise stereo DACs, and I use also ADAU DAC2 and DAC3.
I have a 24.576MHz crystal and I used an internal fs=96kHz (I used your faq instruction for PLL setting), the clock output is buffered and the DSP works as master of I2S comunication (MP4 and 5 connected with MP10 and 11 each).
I have test, with a simple audio path (attached TestInternalDac.jpg) that internal DAC works properly.
Only when I check the Master Mode checkbox in the Hardware Configuration windows the output signal disappeared.
Changing the outputs to I2S data I could see the audio signal on CODEC.
So...could I work with both outputs type or is not allowed?
Or have I make something wrong?
Thanks and best Regard.
thanks for your prompt reply.
I think I'm not explain so well....
I've just made a project similar to yours in which I have both digital serial output cells that on-chip DACs, both with the same audio input, but I can see output signal only on serial digital outputs.
After that I create a new project to test the hardware, the pictures of the original post refers to this ones.
I observed that also when I have only DAC2 and DAC3 outputs, if I cheked the Master Mode check box the output signal disapperead from these outputs.
I hope I was clearer...thanks for you ssupport.