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  • TI Thinks Resolved

PCM5100A: PCM5100A no output

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Replies: 9

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Part Number: PCM5100A

Dear TI:

    We used PCM5100A for experiments. The I2S audio signals BCK, LRCK and DIN are inputted to the PCM5100, and the BCK, LRCK, DIN pin Waveform as an attachment, however, there are no outputs.Test VNEG=-3.3,CAPP=1.65V,CAPM=-1.65V.1273.I2S_PCM5100A.pdfI2S.rar

    ipq-codec.cI2S.rar

   

  • Hi Eric,

    Can you confirm the voltage on LDOO, DVDD, AVDD, and XSMT?

    Also, do you have any external load connected to the DAC?

    Thanks,
    Paul
  • In reply to Paul_Frost:

    Any updates?
  • In reply to Paul_Frost:

    Hi,Paul

    I‘m very sorry for the late reply.

    LDOO=1.8V, DVDD=1.8V, AVDD=3.3, and XSMT conected to AVDD=3.3V;

    An RC is connected to the DAC, reference EVM design.

    As shown in the attached schematic, D211 and D212 have been removed.Use oscilloscope AC mode test.

    I2S_PCM5100A _ I2S_PCM5100A.pdf

  • In reply to Paul_Frost:

    Hi,Paul
    Can you provide the driver code?
  • In reply to user1889142:

    Hi,

    Can you share the oscilloscope image? Is it truly zero output? Can you confirm that the I2S data is valid and has data content?

    We do not have a driver for this device- as it is a hardware controlled device.

    Thanks,
    Paul
  • In reply to Paul_Frost:

    HI

    It can be ensured that there is no output, and the probe point is the same on the L/R output as the waveform on the GND, only the noise floor. No waveforms are saved yet, and waveforms are emitted later.
    From the DIN pin, you can see that there is data input.

  • In reply to user1889142:

    Is this an issue with a single board? Have you replace the unit?
  • In reply to Paul_Frost:

    Hi,Paul

    The problem has been solved, because the SCLK frequency sent by the CPU is 5644.848KHz, the BCK frequency is 1411.20144KHz, and the sample frequency is 44.1Khz. According to Table 11, the PLL MODE needs to be configured at this time. The SCLK access needs to be deleted and processed by the PCM5100A internal PLL. .
    In addition, is there a chip with a P 2 P chip with volume adjustment instead?

  • In reply to user1889142:

    Yes, that would cause the problem. There is not a P2P chip, but the PCM5122 is the I2C controlled version of the device.

    Thanks,
    Paul

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