BQ34Z100-R2: Failure after attempted programming

Noam Levy

Part Number: BQ34Z100-R2
Other Parts Discussed in Thread: BQSTUDIO, BQ34Z100EVM, BQ34Z100,

Hello, we use the BQ34Z100-R2 in our design which closely follows the BQ34Z100EVM. We connected our board to the BQStudio and it identified the fuel gauge correctly. I initiated programming of the fuel gauge with our golden image - shortly after starting the programming, BQStudio lost communication with the fuel gauge. Now the fuel gauge is no longer identified by BQStudio, and when trying to read the fuel gauge it displays a message that there was no acknowledge from the device. Is the fuel gauge vulnerable to communication failure during reprogramming? Power to the board was stable, so there was no power interruption during programming. Can the BQ34Z100 be reset somehow to renew communication?

Thank you,

Noam

over 1 year ago

0 Diego over 1 year ago

TI__Mastermind 25835 points

Hi Noam,

There is a possibility your device has entered ROM mode.

Can you verify the TS pin on the device is pulsing?

Regards,

Evan

0 Noam Levy over 1 year ago in reply to Diego

Prodigy 120 points

Pin TS is steady at 2.5V. Can you elaborate on what is ROM mode? I could not find anything in the technical reference manual.

If in ROM mode, can we access the fuel gauge in anyway? Does it have a "reset to factory default" kind of feature?

Thank you, Noam

0 Adrian over 1 year ago in reply to Noam Levy

TI__Mastermind 37761 points

Hey Noam,

Today's a federal holiday so no one is in the office. We will get back to you tomorrow.

Regards,
Nick Richards

0 Diego over 1 year ago in reply to Adrian

TI__Mastermind 25835 points

Hi Noam,

Thank you for your patience.

Can you check the status of REG 25, your device could be damaged.

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