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how to reslove the question of the rate of TLK1501 device with the front system?

CHAOYONG KOU
Prodigy 10 points
Other Parts Discussed in Thread: TLK1501

hi,

  i use the TLK1501 to do a fiber optical  transmission . The front system is an ADC, the output of the ADC enters into a  FIFO . THE  output of the FIFO enters to TXDATA[0-15] of the TLK1501 .  but  the problem is that ,  the rate of the ADC is only 5 MHZ, and the rate of the TLK1501 is 30-75MHZ , so i use the TLK1501 rate 50 MHZ, i receive the data 5 times .  So i want to know how to resolve the problem ? thank you  very much!

  • 0
    TI__Expert 7850 points

    Hello Chaoyong,

     

    I am not sure if the setup below will work.  If the FIFO is being fed at 5MHz  but is being emptied into the TLK1501 16 bit interface at 50MHz then the FIFO will become empty very quickly.  Once the FIFO is empty, then the data being fed into the 16 bit input of the TLK1501 will likely be invalid.  This setup could possibly work if somehow the system can detect invalid data that results when the FIFO runs empty and flag that data as invalid for system use.  This way, you can “filter” for only valid data.

     

    Thanks,

     

    Atul