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DAC3484EVM: CDCE62005 EEPROM & Wake Up

Matt Thomas13
Prodigy 90 points

Part Number: DAC3484EVM

I have the DAC3484EVM and TSW1400EVM working together well with the supplied TI Software.  Thank you for providing such a great evaluation kit!

I would like to be able to configure the DAC3484 directly (instead of over USB) by connecting to the SPI jumpers for the DAC.  However, there is no way to configure the CDCE62005 except over USB.

The CDCE62005 is supposed to (based on my reading of the documentation) store its settings in non-volatile memory and automatically configure itself after a power-up.  However, I cannot see this happening.  

Whenever I power-up the DAC3484EVM board, I have to toggle the "Wake Up" button in the DAC3484 EVM Software Control GUI a few times before I can see the "LOCK" LED (D1) light up.  I suspect the process of toggling the "Wake Up" button is also sending the configuration data down to the CDCE62005.

How can I make the CDCE62005 on the DAC3484EVM automatically wake-up and configure itself from my last used settings?

Thank you!

  • 0
    TI__Expert 4415 points
    Hi Matt,

    The CDCE62005 requires a different procedure to program the EEPROM- it is not automatically programmed when the registers are loaded. The DAC3484 EVM GUI only supports loading the volatile CDCE62005 registers and cannot program the EEPROM.

    To test configuration of the DAC3484 directly I recommend first powering up the board from an external power supply, then connecting the USB to load the CDCE62005 registers and ensure the PLL is locked, and then disconnect the USB and connect to the DAC SPI jumpers.

    Regards,
    -Tim
  • 0 in reply to Tim Chao Li
    Prodigy 90 points

    Thank for the reply Tim. I have come to understand the requirements of programming the CDCE62005 EEPROM.

    Unfortunately what you propose will not work for what I need.  So, in the time since I originally asked the question, I have come up with an alternate solution to program the board over USB without using the supplied TI software.  This will allow me to do what I need.

    -Matt