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CDCI6214: CDCI6214 questions

Kailyn Chen
Genius 9560 points
Part Number: CDCI6214

Hello，

About CDCI6214 TICSpro, we could find that there is a note about  pll_ndiv. It means: Ncount value. The actual value will be 4 less than programmed value. Also - during the calibration - the value will 4 times (minus 4) the programmed value.

I'd like to confirm what does it mean? If we used the TICSpro value when programming? I didn't find any related description about this note, so please help to confrim. 

Best regards

kailyn

  • +1
    TI__Mastermind 19800 points

    Kailyn,

    With regard to the subtraction of 4, this is to compensate for an internal offset in the device. The minimum value that can be written here is N = 6, which corresponds to a divide by 2.

    The value is 4 times (minus 4) the programmed value during calibration because the clock supplied to the N-counter circuit by the internal state machine is divided by 4 - the multiplication of N by 4 balances this change. This behavior does not require any change to be made on the customer's end, as far as the N value is concerned.

    Thanks,

    Kadeem