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BQ20Z45: .senc file and exporting data flash image for production

Sandra Senn
Prodigy 10 points
Part Number: BQ20Z45

I have a bq20z45 EVM and using the bqEZ tab of the EVM software.  I have done all the calibration and cycle (charge discharge).  I got to the last step and the .dfi file was created and downloaded with no errors.  Max Error is at 1% and cycle count went back down to zero.  Hoever I am not sure what to do next.  The manufacturing golden pack instructions say to write 0f00 to word 00 but I get an error when doing that write - VBUS_BAD_PEC.  also not sure where the .senc file is stored or how to access it (along with chemical ID).  this is referring to doc SLUA334b sheet 2 section 3, step 5. 

  • 0
    TI__Guru* 76230 points

    Hi Sandra.

    Sending the command 0f00 is to put the gauge into rom mode if you are trying to program an senc file. You are trying to program a golden .dfi and you don't need to do that.

    Click on the bqeasy link, click on set up, you will see this screen below. click on load/reead .dfi or .rom file.. this will allow you program you .dfi file on several other devices.

    if you are trying to obtain a .senc file. you will need to put the gauge in rom mode and then extract the file. See app note below. make sure the device is not in a sealed state i.e verify that the FAS and SS flags are not set.

    bq500110_updating firrmware with the bqevsw.pdf

    thanks

    Onyx