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DSK6416, codec and multiple DAC EVMs

Mathijs vd Werff
Prodigy 25 points

Other Parts Discussed in Thread: DAC7562

Hi,

Currently, I am working on a system that needs to sample an audio signal, digitally process it, and output it to multiple output streams using DACs.

The setup is based on a DSK6416, the audio sampling is done using the AIC23 codec on the DSK6416. For the DAC I use a DAC8562EVM (the DAC7562 version) board, connected to the DSK6416 using a 5-6k interface. 

I got this working, but I only have one problem: the DAC8562EVM has 2 output streams, but the next step in my setup is to use 4 output streams.

I have an additional DAC8562EVM, but do not know how to connect it to the DSK: there seem to be 3 MCBSPs available. Two of them are needed for the codec(MCBSP1 and MCBSP2), and one for the first DAC8562EVM(MCBSP0).

I was wondering whether someone knows a way to get an other DAC8562EVM connected? Is there some way, for example, to multiplex the MCBSP?

Thanks in advance!

Regards,

Mathijs

  • 0
    TI__Guru* 84110 points

    Mathjis,

    Your best solution will be to locate a compatible daughtercard that has more DAC outputs than the DAC8562EVM.

    The DAC8562EVM is not designed to be stackable. It is designed to be used to demonstrate the two available outputs.

    If you have 3 DSK6416 boards, then you could send McBSP1 from board 0 to board 1 and McBSP2 from board 0 to board 2. Then boards 1 and 2 could have DAC8562EVMs on them connected to McBSP0 on each. I am not sure how you would handle the wiring for the McBSP1 & McBSP2 signals, but that is all I can think of to help.

    So the best choice would still be finding a suitable daughtercard.

    Regards,
    RandyP

  • 0 in reply to RandyP
    Prodigy 25 points

    Thanks for your quick reply! I will contact my supervisor and ask whether I could buy an other DAC daughtercard

    Regards,

    Mathijs