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Original question:

TAS5825M: TAS5825M Output

TAS5825M: PPCMB can't connect our TAS5825M board

aggil liang
Expert 2660 points
Part Number: TAS5825M

Hi Team

    We use TAS5825M to design a 2.0 speaker,  it need to design the audio performance. But we can't connect PPCMB to our TAS5825M board, there is no output of TAS5825M.  the PPCMB can connect TAS5766MEVM board. Below picture is our schematic, Can you help to check is there anything wrong ?

  • 0
    TI__Genius 9995 points

    Hi aggil,

    I notice that you use PPCMB as I2C controller for your board. Please check

    Can you check whether I2C communication is good or not firstly? As you known, PPC3 has default 0x98 for I2C address that is decided by R201 in your schematic. If your I2C address is not 0x98. Please use following method to communicate with TAS5825: TAS5825 Home--> Get into Tuning and Audio Processing --> choose your flow --> Get back to TAS5825 Home--> End System Integration --> In-System Tuning -->choose your I2C address.

    Then I would recommend you to check your I2S signal is ok or not. If I2S & I2C have worked well, please use I2C master to read fault status.

    w 98 00 00

    w 98 7f 00

    r 98 70 04

    r 98 68 01

    P.S. 0x98 is the I2C address.

    Regards,

    Alix Wan.

    Regards,

    Alix Wan.

  • 0 in reply to Alix Wan
    Expert 2660 points

    Hi Alix

         When we connnect our board ,it indicate two wrong points as below pictures. About these, what should I do to eliminate them ?

    1. Hardware ID is incorrect.

    2. Communication to device B has failed.

  • 0 in reply to aggil liang
    TI__Genius 9995 points
    Hi Aggil,

    Sorry for delay. As to your questions:
    1. Hardware ID is incorrect. As can be seen in your capture, all other items pass the hardware check but Hardware ID. As a matter of fact, you can ignore this issue as it does not matter.

    2. As to second question, it seems that you have trouble in connecting to device B. But have only one TAS5825 for stereo 2.0 mode, right? If so, why you have a device B? If you are using 2.2 mode with 2 TAS5825, they you may need to check your I2C address of devices B. In default, PPC3 regards 0x98 for device A and 0x9A for device B. Hence, Can you check that?

    Regards,
    Alix Wan.