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TLV320AIC3254 EVM - USBMODEVM firmware for 96.000 kHz sampling rate

pascal vergnaud
Prodigy 40 points


i wanna use USBMODEVM at 96 kHz and maybe at 192 kHz ... is this possible ?

and where to find the firmeware files for this frequencies (USBMODEVM0202_96KHZ.BIN and USBMODEVM0202_192KHZ.BIN ?? )

thx,

  • 0
    TI__Mastermind 46195 points

    Hello Pascal,

    The USB full-speed interface does not allow stereo, full-duplex 96 kHz (or higher), 16-bit isochronous audio data due to bandwidth limitations. That is the reason why there is no 96 kHz firmware file for the USB-MODEVM.

    Regards,

    J-

  • 0 in reply to J-
    Prodigy 40 points

    Ok, thx for replying.

    so, i'm trying tu use EVM by this way:

    -audio generator linked on IN1L

    -audio analyzer linked on headphone output Left

    -Purepath config: (a bypass in fact)

         samplerate : 176.4Khz

         framework : AIC3254App2x1x

         input : MonoDec1xIn

         interprocessor : MonoDSP_A_DSP_D2x1x

         output : MonoInt2xOut

    this works nice, except that this bypass is a low pass !

     

    Freq in kHz  dB output
    2 -5.8
    10 -5.8
    20 -5.8
    24 -6
    28 -7
    32 -9.3
    36 -13
    40 -20
    44 -31
    48 -52
    52 -63
    56 -67
    60 -80

    what is wrong ????

     

  • 0 in reply to pascal vergnaud
    Prodigy 40 points

    humm, i understand my mistake: it's not the good component for my application ...

    it's an "audio only" chip