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BQ27425-G2A: Wrong FW version.

Alexandru Petrescu
Prodigy 250 points
Part Number: BQ27425-G2A
Other Parts Discussed in Thread: BQ27425-G1

Tool/software:

Hello!

Situation: BQ27425-G2A on over 100 custom PCBAs. The DEVICE_TYPE read is 0x0245 which is what to be expected. But the FW_VERSION reported by the gauge is 0x0202 which according to your documentation is wrong. It should be 0x0205. The problem is that the device is in production phase (already validated) and the application FW isn't working anymore. It worked with previous lot of BQ27425-G2A which had FW_VERSION 0x0205. Why are BQ27425-G2A on the market with FW_VERSION 0x0202? Is there any possibility to change the FW on the BQ27425-G2A?

Regards,

Alexandru Petrescu

  • 0
    TI__Mastermind 26605 points

    Hi Alex,

    You can not flash new fw onto this device.

    Regards,

    Evan

  • 0 in reply to Diego
    Prodigy 250 points

    Hello Evan,

    Thanks for your response related to changing the gauge FW. But what about the mismatch between the FW version and the gauge HW version. Now I have more information about the situation. I've attached a photo with the reel we've bought. It says G1 but when I read DEVICE_TYPE I get 0x0245 which corresponds to G2A. How is that even possible?

    One more thing: having to deal with 0x0202 FW I need to know what value has "tPUCD Power-up communication delay". I didn't find it on bq27425-g1.pdf.

    Regards,

    Alexandru Petrescu

  • 0 in reply to Alexandru Petrescu
    TI__Mastermind 26605 points

    Hi Alexandru,

    I am not familiar with the packaging process but whatever the device reads is correct.

    Regards,

    Evan

  • 0 in reply to Diego
    Prodigy 250 points

    The device I have responds with DEVICE_TYPE = 0x0245 (BQ27425-G2A) and FW_VERSION = 0x0202. Is this combination allowed? I'm asking because I didn't find anything on TI documentation related to this. And one more time: having to deal with 0x0202 FW I need to know what value has "tPUCD Power-up communication delay". I didn't find it on bq27425-g1.pdf.

  • 0 in reply to Alexandru Petrescu
    TI__Mastermind 26605 points

    Hi,

    The G1 and G2A use the same hardware so you may disregard the HW version. The 0x0202 indicates G1 FW which is what is listed on the reel. 

    If you should have received G2 FW please contact your local Ti office.

    Regards,

    Evan