DIX9211: How soon the sampling freq calc result available?

Hello Oguri,

Which sampling frequency are you wanting the calculation of: the audio port or the S/PDIF input?

Thank you,

Elizabeth Weichel

Hi Elizabeth,

Thank you for the feedback!

The sampling frequency I would like you to calculate are 32k, 44.1k, and 48kHz.

The input is audio port.

Regards,

Oguri

Thank you Oguri,

I will do some additional research and get back to you.

Elizabeth Weichel

Hello Oguri,

On page 20 of the data sheet, there is a timing diagram and a chart. Figure 5 shows the latency time between the input and DOUT. It looks like the latency time is 4/(fs) (where fs is sampling frequency). Please let me know if this answers your question.

Elizabeth Weichel

Hi Elizabeth,

Thank you for the feedback!

So, the time is "4/fs"? But it looks more like "1/4fs" in the figure, and I guess makes more sense. Which do you think is correct?

Regards,

Oguri

Hello Oguri,

In the original question, you mentioned that the calculation is seeming to take "some time". By this, did you mean almost 2 hours? If it is 1/4(fs) then for a 32k input, the latency would be over two hours. If it is 4/32k, then it would be around 0.13 ms. If either of these match the latency that you are experiencing, then that would help clear the confusion on the timing diagram.

Thank you,

Elizabeth Weichel

Hi Elizabeth,

I did not mean 2 hours. I thought 4/(fs) should be somewhat too long, because it is as long as 4 cycles of LR clock. it does not match what is described in the figure 5.

Thanks.

Regard,

Oguri

I will try to verify this information. Please allow me a few days to ensure that 4/fs is the correct latency.