• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 214 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

BQ40Z50: BQ40Z50

BQ40Z50: BQ40Z50

liqiang zeng
Prodigy 180 points
Part Number: BQ40Z50
Other Parts Discussed in Thread: BQSTUDIO

Dear friends

Could you please teach me how to set or change the security keys  for  seal/ unseal/full access for BQ40Z50.  I have searched the BQ40Z50 datasheet and  techincal documentation. But failed to find related information.

Thanks

zeng

  • 0
    TI__Mastermind 42535 points

    Hi Zeng,

    You can manually change the keys in the df from bqstudio just by writing to the registers and entering the new value in full access mode within 4s. Then reset the gauge and to seal you can send the command 0x20. To unseal, you will have to enter the keys in little endian back to back.

    For eg if the unseal key in df is 0x1404 0x7236, you wil have to enter it as 0x0414 0x3672 back to back in less than 4s to unseal.