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PCM3168A: Configuration guidance

Part Number: PCM3168A


PCM3168A experts,

One of our customers is looking to configure the PCM3168A to act as a slave on the I2S/TDM port, with the Audio Clock master providing:

SCKI = 24.576 MHz

Bit Clock = 12.288 MHz

LRCK = 48 kHz

6 channels "in" (ADC to DOUT1) and 8 channels "out" (DIN1 to DAC)

Bit clock is running at 32 bits/sample, while only 24 bits are used per sample, and the 24 bits are left justified.

I believe this lines up with Figure 1, Single Rate, 48 kHz, 512 fs, 24.576 MHz.  And Figure 52, Left Justified Single.

Can you confirm for me that this is a valid configuration for this device?

What should the settings be for:

FMTDA[3:0] in register 65

FMTAD[2:0] in register 81

Thanks,

Darren

 

  • Hello Darren,

    Yes, this is a valid configuration for this device.

    The first 24 bits of each frame will be data, last 8 bits of each frame will be ignored. 

     Register 65 FMTDA[3:0] should be 0111

    Register 81 FMTAD[2:0} should be 111

    best regards,

    -Steve Wilson