• State Resolved
  • Locked Locked
  • Replies 7 replies
  • Answers 2 answers
  • Subscribers 64 subscribers
  • Views 299 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS25751: Write EEPROM with TPS25751

Stefano Nobili
Prodigy 40 points
Part Number: TPS25751
Other Parts Discussed in Thread: TPS26750

Tool/software:

I have a board with a TPS25751 and a EEPROM and I have few questions about how to use the TPS25751 with the EEPROM.
My idea is the following, during the first power of my board the EEPROM will be empty so I load the FW of the tps25751 from the MCU. After that, I'll use the
tps25751 to write the EEPROM so during a second boot the TPS25751 will load the the FW from the EEPROM. And if I want to change the configuration I can always re-write the eeprom and performe a "GAID" or reboot the board. Is this correct?
REF: I2C EEPROM UPDATE

  • 0
    TI__Mastermind 37855 points

    Hi Stefano,

    The App note you shared is not intended for updating an empty EEPROM. It is intended for updating an already populated EEPROM.

    The recommendation for flashing an empty EEPROM has always been to flash it using a 3rd party tool and a Full flash binary.

    Stefano Nobili said:
    My idea is the following, during the first power of my board the EEPROM will be empty so I load the FW of the tps25751 from the MCU. After that, I'll use the
    tps25751 to write the EEPROM so during a second boot the TPS25751 will load the the FW from the EEPROM. And if I want to change the configuration I can always re-write the eeprom

    For the initial write, this idea might be fine, but is not something we have tested or can verify. The FLAd and FLwr commands do appear that they can do generic writes to the EEPROM, so you may be able to write a full flash binary to an empty EEPROM. But, as mentioned, this is not something we have tested nor do we advertise capability for, so you may need to explore this on your own.

    As long as the EEPROM has a valid full flash binary and the TPS25751 can boot from it properly,

    Thanks and Regards,

    Chris

  • 0 in reply to Christopher Lim1
    Prodigy 40 points

    Everything works fine, I was able to write an empty eeprom via TPS25751 initialized by a MCU. It takes time but it works.

  • 0 in reply to Stefano Nobili
    Prodigy 50 points

    Hi Stefano,

    We are also using this chipset with our processor board. We want to write the empty EEPROM with the full binary.

    It will be a great help if you share the steps followed by you to write the binary.

    Thanks & Regards,

    Dhanush DC

  • 0 in reply to Dhanush D C
    TI__Mastermind 37855 points

    Hi Dhanush,

    I can't guarantee Stefano will respond to this thread as it is primarily for TI -> customer support.

    He likely followed the following steps:

    1. Used the PBM flow described in section 5.2 of the TRM to initially get the TPS25751 into an "APP" mode.

    2. Used the FLxx commands to write the full flash binary generated from the GUI to the Empty EEPROM. You may need to do some testing on your own end to see how the FLxx commands can be used in this situation if Stefano does not repond.

    Thanks and Regards,

    Chris

  • 0 in reply to Christopher Lim1
    Prodigy 40 points

    Correct. First of all, I have initialized the TPS25751 with PBM commands and then I have followed the application note "TPS25751 and TPS26750 EEPROM Update Over I2C" to write the eeprom. To perform a single EEPROM writes you have to write four registers, write the register 0x09 with the address and then perform the command "FLad", again register 0x09 with the data to write and then the command "FLwd".
    It's quite simple, follow the Application Note.

    Best regards, 

    Stefano

  • 0 in reply to Stefano Nobili
    Prodigy 50 points

    Hi Stefano,

    Thanks for the input. We will try it.

    Thanks & Regards,

    Dhanush DC

  • 0 in reply to Dhanush D C
    TI__Mastermind 37855 points

    Thanks Stefano.

    Will re-close this thread now.

    Thanks and Regards,

    Chris