Daisy chain mode clock

Hello Elec23,

Thanks for putting this together. This is only a clocking diagram and does not show the data flow but I like this. It is a simple diagram to show the interconnections. Now you need to come up with one for data flow and show which pins are being used. This is important for the Daisy-Chain mode. 

I assume you will be running it all in TDM8 mode? That will allow you to combine the four ADCs into one data stream but to combine all the DACs means you would have to operate using TDM16 to get it all on one data line. This is a little more difficult to meet the timing margins with the ADCs. For the DACs it is less of a problem because the clocks will be in the same direction as the data. 

Then the other question is what is the sampling rate you intend to use? 

Thanks,

Dave T

Hi Dave thanks for your reply;

my application is 8 ADC and 8 DAC. my sampling rate is 48Khz and I will use TDM8 mode. I want to use just second codec DACs.My data flow is like this:

1.)DSDATA1 and DBCLK and DLRCLK from second codec is input from MCU for DAC outputs. I connect DSDATA3 pin of second codec to ground too.

2)As I show in that picture, I connect ALRCK, ABCLK of first codec to second codec and define ALRCLK and ABCLK of both of them as slave and feed them from MCU ALRCLK and ABCLK pins that defined as master.

3)For ADC data I connect first codec ASDATA1 to ASDATA2 pin of second codec and connect ASDATA1 pin of second codec to DATA pin of MCU.Also I connect ASDATA2 of first codec to ground.

I hope this detail be enough. About clock setting of codecs I write setting in that picture.Now Dave we need your help for completing our design.Are clock setting and diagram is okay? what about data connecting?

Thanks for your helps.

Hello Elec23,

This all sounds good. This should work and I see no problems. TDM8 at 48kHz will give you plenty of timing margin. 

Dave T