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TAS5756M switching frequency

user4039322
Prodigy 140 points
Other Parts Discussed in Thread: TAS5756M

Damian Lewis,

HI,My TAS5756M board' switching frequency is 861KHz. The SPK_GAIN/FREQ pin is 5.7V. And the Speaker can't work.

There is a 16bit 44.1kHz sampling I2S signal input 

SCLK: 2.822MHz

LRCK: 444.1kHz

SDIN: I2S Data

MCLK: 11.2896MHz

   Why?

     xu

  • 0
    TI__Mastermind 34775 points

    Xu,

    The SCLK should be 32fs for 16bit I2S (2chan * 16bits) at 44.1kHz is 1.4112MHz. 2.8224MHz is for 64fs.

  • 0 in reply to Damian Lewis
    Prodigy 140 points
       HI,  Damian Lewis, 

       I don't think our TAS5756M can't work is ascribed to SCLK is 2.822M.  

       We think there is the TAS5756M'S DAC  is  power down  model. How  develop Mini DSP, should have what kind of

    software configuration file?  We had download the TAS5754M56MDCAEVM-2.1_rev34761-windows-installer.exe. Whether

    the PurePath Console need a key to develop Mini DSP?  

    Looking forward to your reply, thank you!

  • 0 in reply to user4039322
    TI__Mastermind 34775 points

    Xu,

    It should work with SCLK = 64fs. Are you using our EVM? TAS5756M when power up and provided with valid I2S signals should play audio as default without any I2C writes.

    PPC GUI software you downloaded works with our GUI and has the programmable configurations. I don't understand what key you are referring to. The options you see in the GUI are all the MiniDSP options and isn't user programmable.

  • 0 in reply to Damian Lewis
    Prodigy 140 points

    HI,

    Damian Lewis, 
     
    We are not using your EVM.

    Is our own development board.The TAS5756M chip we need 2 star your company made digital power amplifier dual PBTL output, 1 TAS5756M into the left channel, the other TAS5756M into the right channel.

    Our debugging found yesterday, found not to configure the I2C TAS5756M can make a sound, but the configuration of I2C is disorder.

    Looking forward to your reply, thank you!

    Xu