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Original question:

TLV320DAC3100: Class-D output

TLV320DAC3100: TI's audio converter TLV320DAC3100 chip cannot output sound

Gabriel Wang1
Genius 4725 points
Part Number: TLV320DAC3100
Other Parts Discussed in Thread: DIX4192,

Tool/software:

Dear Exert

The schematic diagram is as follows: (1. The microphone enters from port A of DIX4192, outputs from port B, and the clock is provided by DIX4192)

2. The converted digital audio is connected to DIN and then output by SPKP and SPKM

The oscilloscope screenshot is as follows:
MICDATA-RIGHT input signal as shown in the figure

DIX4192: PORT_A_IN, PORT_B_OUT

SPKP and SPKM of TLV320DAC3100

  • 0
    TI__Mastermind 30781 points

    Hi,

    Would you please apply a digital input along with other I2S signals directly to DAC and verify the outputs. At this moment we don't know if the issue is coming from inputs to dac or the registers which might not be matching with input signals,  among  other possibilities. Also we need to know the exact values of clks as well as screen shot of the clks and DIN so we can compare it to figures like Figure 6-27. Timing Diagram for I2S Mode.

    Regards,

    Arash

  • 0
    Prodigy 30 points

    By following these steps, we ensure that the sound node is properly configured for our setup

    Click Here

  • 0 in reply to Maaz Patni
    TI__Mastermind 30781 points

    Hello Maaz

    This link takes me to an article titled  "Your Guide to Android & Linux BSP Development"  which goes over some general topics with different SOC and CODEC devices.

    Please see my questions in the above post again and provide answer to those.

    Basically   if there is no sound at the output of TLV320DAC3100 in your  system , you need to check the DAC by itself by applying an I2S signal (i.e., a 1KHz sinewave)   directly to this DAC . 

    • If you see the sinewave is correctly reconstructed at the output , then your problem is not due to this DAC and you have to move to the other parts in the chain.
    • If you do not see the sinewave at the output of this standalone DAC, then either you have an issue with the I2S signals (format, clk values, ....) or your device is not configured correctly. In that case I need to get the full information about your clks and screen capture of I2S signals in one screen so I can clearly see the edges of all I2S signals in order to verify the I2S is of correct format and we can go on.

    Regards,

    Arash