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PCM4104: PCM4104 TDM connection for 4 pieces PCM4104 (16channels)

PHILIP HSU
Expert 1900 points
Part Number: PCM4104

Sir,.

please suggest PCM4104 TDM connection for  4 pieces PCM4104 (16channels),

or buffer requirements that between to SPI/SCK , thanks

is there any reference schematics in application ?

  • 0
    TI__Guru 52663 points

    Hi Philip,

    The PCM4104 supports TDM in two formats:

    1. A TDM "short frame" containing only 4 channels of data

    2. A standard 8 channel TDM frame, with two PCM4104s. One is configured using the SUB frame to accept the first 4 channels, the other is configured to accept the next 4 channels.

    If you want to use sixteen channels, then you need to use two dedicated data lines with 8 channels each, or 4 lines with 4 channels each.

    In regards to the SPI lines.  The PCM4104 does not support daisy-chaining, so you will need to have a unique chip select line for PCM.  You can share a CS lines if you will be writing identical data to each device.  I do not think you will need any data buffers as long as the SPI signal does not violate any of the timing specifications.

    Thanks,

    Paul