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Original question:

TUSB4041I - I2C EEPROM programming

TUSB4041I: Access to attached EEPROM

Michael Gagnon
Prodigy 20 points
Part Number: TUSB4041I


Hello.

Is it possible to access/program the attached EEPROM in an embedded environment? In other words, the TUSB4041I upstream USB is not connected to a Windows-based USB host. The upstream USB is attached to an NXP SOC running an RTOS, and we want to know if we can use the "vendor-defined USB device requests" to read/write the EEPROM, not just the OTP.

This thread https://e2e.ti.com/support/interface/f/138/t/551914 implies it is possible using a Windows-based application/driver. Using a Windows-based application/driver is not possible in our design.

Thank you

  • 0
    TI__Guru*** 148160 points
    will find answer tomorrow.
  • 0
    TI__Guru 60870 points
    Hi Michael,

    For the hub to enter EEPROM programming mode, a custom driver needs to be loaded to force hub to connect as a EEPROM programming endpoint and then the programming utility can be used to program the attached EEPROM. These custom utilities are only available for Windows platforms since we anticipated them being used only during the development stage and not in production when many application use pre-programmed EEPROMs.

    Regards,
    JMMN
  • 0 in reply to JMMN
    Prodigy 20 points
    Hi JMMN.

    I agree. Some HW designers were hoping to store some company/product specific data in the EEPROM "after" the hub configuration data. I am trying to convince them it is not worth the effort.

    Thank you for the info