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LMK03318: EEPROM NOT PROGRAMMING

Megan Meagher
Prodigy 40 points
Part Number: LMK03318

I am trying to program the part on our board and it doesn't seem to be saving to eeprom. I can use Tics pro wizard, apply it and see the correct clock signals. I then go to the EEPROM tab and run scrips 1, 2, and 3. But after power cycling I lose everything. I have tried programming to all pages.

Thanks

  • 0
    TI__Mastermind 18070 points

    Hello,

    Please make sure that GPIO3 and 2 are configured to select the correct EEPROM page. Below snapshot is taken from the EVM user guide:

    Regards,
    Hao

  • 0 in reply to Hao Z
    Prodigy 40 points

    I have already double checked that I had it set to page 0 and was writing to page 0, and it's not working. I have also tried writing to all other pages.

  • 0 in reply to Megan Meagher
    Prodigy 40 points

    I think I have found my issue but I would like help in understanding the problem. The EEPROM was indeed being written to. The problem was that on power cycle the POR is not resetting the part. I have to pull PDN low and release it to get it to start running. We are using two parts. Part 1 is using a clock input from another location, and Part 2 is getting its reference from the 50mHz crystal that you recommend in your evm documentation. The part with the funny behavior is the one with the crystal. For now I have placed a 10uF cap on the PDN pin to hold it in reset longer after power cycling. I need to understand the behavior better to correct the design on our board. Can you please help with that? Thanks

  • +1 in reply to Megan Meagher
    TI__Mastermind 18070 points

    Hello,

    I'm a little confused with POR not resetting the part. Normally you can either power cycle the whole chip or toggle the PDN pin to reset the chip. The power sequencing guide can be found below:

    Regards,
    Hao