ADAU1701 i2S in/out help needed.

Hello JFK,

Please check if the DSP is up and running. You can try something like below and see if the level detector is showing a signal.

Regards,

Harish

Hello -JFK-

There are a few things that is not clear with what you are doing with the entire system connections but I think you want to have the SPDIF board converts it to I2S interface. So you want that board to be the clock master and that includes the master clock (MCLK) too correct?

So you want the 1701 to be a clock slave for both the serial input and serial output port. I can see that in your register settings that you set the serial output port to be a slave.

Well, if that is the case then you really need to feed some clocks to the serial output port. the serial input port is its own block and shares NOTHING with the serial output port block.

So you are feeding clocks to LRCLK and BCLK_IN pins but you are not feeding anything into the LRCLK_OUT and BCLK_OUT pins. You do not have the registers turned on to make those pins be clock inputs. You will need to connect the LRCLK and BCLK to those pins as well.

It is really confusing. The clock pins are named IN and OUT but this is to tell you which serial port it is associated with, the serial input or serial output port. I does NOT mean the direction of the clocks.

Dave T