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Original question:

BQ27510: BQ27510 I2C Not Detected

BQ27510: Old / no SW devices

RJ
Intellectual 2550 points
Part Number: BQ27510

Hi Team,

Out customer's production team is receiving BQ27510 devices with either no software installed or very old firmware on them (V1.11).   

We have only seen v1.23 or v4.00 on the fuel gauges.

What can my test software do if anything on these chips that have older or no s/w installed?

For review:

The test software first determines which version is installed.  If v1.23 then our regular .dffs file is used to set the battery configuration for our meter.  If v4.00 then our full .bqfs is programmed back onto the device to down grade it back to v1.23.

Regards,

RJ

  • 0
    Prodigy 30 points

    All the assemblies that are failing test are built with the date codes 849J and 849C

    I have only seen one assembly with 849C so far.

    All the board assemblies that passed test are built with date code 660C.

    We currently only have  with the date code 849J in stock.

    They all have the same Manufacturers Label.
    The only thing different on each label is the LBL: 36A

  • 0 in reply to Brian Matsas
    TI__Guru** 105590 points

    Hello RJ and Brian,

    No matter how the gauges arrive, programming with the BQ.FS file should correct FW and DF. If they are very old parts that have been in storage they may have older FW loaded.

    Sincerely,

    Wyatt Keller

  • 0 in reply to Wyatt Keller
    TI__Intellectual 2550 points

    Wyatt,

    will it still work with no firmware loaded or must there be at least something on it?

  • 0 in reply to RJ
    TI__Guru** 105590 points

    Hello RJ,

    There should always be firmware loaded on the gauge. The gauge must enter or be in ROM mode for programming. There should be some collateral on this in the product page: https://www.ti.com/lit/pdf/slua541

    Sincerely,

    Wyatt Keller

  • 0 in reply to Wyatt Keller
    Prodigy 30 points

    Hi Wyatt,

    Only if the chip has firmware installed then I am able to upgrade or downgrade to v1.23.  If there is no firmware installed then I can't do anything to it.  We have chips with 849 date codes that have v1.11 on them and some with no firmware on them.  Unfortunately we have 1000 boards built with these populated on our circuit boards, just great.  These tiny guys are brutal to replace.

    Regards,

    Brian Matsas

  • 0 in reply to Brian Matsas
    TI__Guru** 105590 points

    Hello Brian,

    How are the gauges determined to have no firmware running? Are they NACKing on both the ROM address and FW address? Were the gauges ever powered up before or tried programming before but failed? If programming was attempted but interrupted it can brick the device.

    No catalog gauges should be shipped without firmware. Can you share some of the IC top markings that are dead?

    Sincerely,

    Wyatt Keller