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PCM9211 DIT configuration issue

Silvio Cescon
Prodigy 90 points
Other Parts Discussed in Thread: PCM9211

Hi,

i'm trying to configure the PCM9211 so that it makes the following things:

- receive 3 type of input...one digital audio input connected to RXIN0; one optical input connected to RXIN2 and one I2S input connected to AUXIN1.

- i can select one of these input and drive it to the main output port.

- at the same time, the selected input will be drived to MPO0 through the DIT.

The problem is the following: if i select as source the RXIN2, in output i have both signals (a I2S from the main output port and a digital output in MPO0). If i select the AUXIN1 signals i have only the main port output, and nothing comes out from the MPO0.

The AUXIN1 signal is an I2S with 24bit RJF and a bit clock 64fs.

Below my simply configuration:

- 6Bh --> 44h (to select the AUXIN1 for the main output port)

- 60h --> 44h (to select the AUXIN1 for the DIT)

- 34h --> 02h (to select the RXIN2 as input for the DIR)

- 2Fh --> 00h (to configure the DIR as 24bit RJF)

- 61h --> 12h (to configure the DIT as 24bit RJF)

Let me know.

Silvio.

  • 0
    TI__Mastermind 27880 points

    Hi Silvio,

    I will have to look into this after the holidays, I will get back to you when I have an update.

    Justin

  • 0 in reply to Justin Bohr
    TI__Mastermind 27880 points
    Hi Silvio,

    I apologize for the delay. Looking at your situation have you tried changing register 37h to AUXIN1? This register controls what the DIT uses as a reference for the clock. I think what is happening is that by default this is set to the DIR and so when you have an RXIN selected it will work because its referencing the DIR by default. So when you switch to AUXIN1 you need to switch the DIT clock reference (37h) to AUXIN1 also.

    Justin