• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 280 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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:

bq20z45 unseal process

BQ20Z45-R1_BQEASY-SW: I can not do it unseal.

Roman Pon
Prodigy 10 points
Part Number: BQ20Z45-R1

I changed the default Unseal Key (write block [60] to change seal key):

New Unseal Key: EEEE AAAA DDDD FFFF 

and Seal device (0020)

what command should I enter to unseal the device ?

  • 0
    TI__Guru 57697 points

    The general sequence of commands is the following for each level of unseal. Full sequence is below but i am not sure if it got UnnsealKeyN mixed up because MSW/LSW is not specified. Wait 5 seconds and exchange the keys to try again

    SMBWriteWord 0x00 UnnsealKey1(EEEE)

    SMBWriteWord 0x00 UnnsealKey2(AAAA)

    This will result in unseal state. May need to exchange if does not work.

    SMBWriteWord 0x00 UnnsealKey3(DDDD)

    SMBWriteWord 0x00 UnnsealKey4(FFFF)

    This will result in full access unseal state. May need to exchange if does not work.