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PCM1753: Mono DAC configuration

Dongbao Zhou
Expert 4130 points
Part Number: PCM1753

Hello,

I have some questions about PCM1753-Q1:

1. How to configure SCK and BCK? the sampling frequency is 16kHz, 16bit audio data. I know BCK should be 2*audio data*sampling frequency, how about the SCK?

2. If one channel audio output is used? Can we configure i2s input as one channel? 

3. Can we use the digital attenuation control to adjust the volume?

Best regards,

Dongbao

  • 0
    TI__Guru 53633 points

    Hi Dongbao Zhou,

    1. SCK should be a multiple of the sample frequency, commonly 128*fs, 192*fs, 256*fs, etc.

    2. If you would like use the device as a mono output, you can use your digital source to make the left and right channel the same.  If not, just use one channel.  Note that you should still have the same number of clock cycles for both left and right channel.

    3. The digitial attenuation control can be considered the volume control.

    Thanks!

    Paul

  • 0 in reply to Paul_Frost
    TI__Expert 4130 points

    Hi Paul,

    Thanks for your reply.

    1. Could you let me know the nom and max value of the control interface timing? 

    2. How to read the register of pcm1753? In our datasheet, only write method is provided, we may need the read method to confirm the write.

    Best regards.

    Dongbao

  • 0 in reply to Dongbao Zhou
    TI__Guru 53633 points
    Hi Dongbao,

    There is no published max or nom value for the timing. Technically the max would be very long, as this SPI interface could be operated manually if you wanted! A typical application would have a MC timing of between 10kHz and 1MHz.

    There is no MISO feature of the PCM1753, read back is not possible.

    Thanks!
    Paul