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CDCI6214: Questions about REFSEL, EEPROMSEL and RESETN/SYNC

Kazuhiko Hirano
Genius 15458 points
Part Number: CDCI6214


Hello,

My customer has a couple of questions as follows.

Q1:
When gpio0_input_sel = 0, without power cycle, REFSEL and EEPROMSEL can be resampled by toggling RESETN/SYNC (High to Low to High)?

Q2:
Without RESETN/SYNC toggling, is it possible to change output clock frequency via register access via I2C?
If yes, could you show the recommended register setting sequences to do that, please?

Best regards,

K.Hirano

  • +1
    TI__Mastermind 18070 points

    Hi Hirano,

    1. Yes you can reload EEPROM by toggling the RESETN pin.

    2. Yes you can change clock frequency through I2C. Simply rewrite all the relevant registers and toggle the RECAL bit, then read back the LOCK_DET bit and make sure that the device is locked.

    Regards,

    Hao