I want to know if we only use the DSP Core and I2S input(27pin) and I2S output(26pin), does the ADAU1761 support this moudle? thank a lot.
Yes, it does. You can come in and out of the DSP using the serial ports and not use the ADC and DACs.
As Dave mentioned, it can operate as a digital only device. But if you are also considering TDM mode, the channel assignments at first glance can be confusing because there is not a one-to-one correspondence with the SIgmaStudio channel number and the physical TDM slot channel number But the on-line Wiki offers a good explanation on the audio signal flow between SigmaStudio channel and I2S and TDM slot assignments.
Input [Analog Devices Wiki]
Output [Analog Devices Wiki]
Thanks a lot, could you help suggest the hardware connection for below application, I mean how to connect the I2S line to ADAU1761 pin.
If each device in the system has it's own MCLK (master clock-in) source, there could be an issue with passing audio from the BT module through the external DAC if each of these are master I2S devices. This can result in occasional repeated or dropped samples. The ADAU1761 does not have an integrated ASRC. Is sample rate conversion available on the BT module?
If it is possible to share MCLK with the Bluetooth, then you can set up the ADAU1761 I2S input and output ports as master I2S devices, and make the external DAC a slave I2S (even it it has it's own clock source, you might still be OK).
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