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Original question:

bq20z451 version 0511

BQ20Z45-R1: How to enter 20bytes/10words of unseal key and full access key

Donna Morgan
Prodigy 10 points
Part Number: BQ20Z45-R1
Other Parts Discussed in Thread: BQSTUDIO

The new chip is installed and ready to connect to i2c. I tested it with python smbus and it works fine. I backed up the key and sealed it, I thought it would be unsealable, but then I realized that unsealkey and fas(fullaccesskey) are 20 bytes (View text file), 10words. I tried for a long time and couldn't unseal. I don't know how to enter 20 bytes of unsealkey.

  • 0
    TI__Guru** 105760 points

    Hello Donna,

    Could you clarify your question? If you are using Python to unseal the device there should be code capable of writing up to 20 bytes to unlock the device. 

    If you cannot unseal the device with python I would recommend using bqStudio to unseal.

    Sincerely,

    Wyatt Keller