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Original question:

CDCE6214: eeprom write failed

CDCE6214: How to read EEPROM contents while in fall-back mode

Rick Tan
Prodigy 10 points
Part Number: CDCE6214

CDCE6214 EEPROM Read and Writes

My device starts up in fall-back mode and I would like to reconfigure it to normal mode.

Is there a way to do so without a power cycle?  CDCE6214 in my system always has pin4 and pin23 floating as VDDREF is applied, therefore, it always powers-up in fall-back mode.

I confirm that I2C is working and I can read the Device registers.  However, I am unable to read or write to the EEPROM contents.

While using a Total Phase Aardvark, I write 0002 to register 0x0B, and when I read register 0x0C (2 bytes), it is 0000.  I expected it to be 1B12 per the datasheet (pg35)

  • 0
    TI__Mastermind 22320 points

    Rick,

    Unless the HW_SW_CTRL pin is pulled to either High or Low, the device will start up in fallback mode. The other option is to write the desired register settings to the device via I2C - there is no mechanism to transfer the EEPROM contents to the live registers of the device without a power cycle.

    While in fallback mode, the EEPROM is still accessible.

    The procedure outlined below is being followed for writing and reading from the device?

    Is a value of "0x0000" returned when any other EEPROM bytes are read? Or only for this case?

     Thanks,

    Kadeem