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Original question:

BQ40Z50-R1: Change Security Keys

BQ40Z50-R3-DEVICE-FW: Changing Security Key

Hans Locher
Intellectual 495 points

Part Number: BQ40Z50-R3-DEVICE-FW

Hi team,

I've tried to change the UNSEAL key like the manual, but the changing did not take place.

(see log file)

What can be the cause?

Please help.

Regardes

Fullscreen Change Security Key.log Download 
Advance Comm SMBus Transaction Log

TimeStamp , Address , Operation , Command , Length , Data , Status , 
/* check Full Access
2020-10-30 11:20:47 994 , 16 , Wr Word , 00 , 2 , 0054 , Success
2020-10-30 11:20:49 462 , 16 , Rd Block , 23 , 4 , 07 01 00 00  , Success
/* read actual Keys
2020-10-30 11:22:31 130 , 16 , Wr Word , 00 , 2 , 0035 , Success
2020-10-30 11:22:34 295 , 16 , Rd Block , 23 , 16 , 14 04 72 36 FF FF FF FF 57 28 98 2A 14 2B 8A 2C  , Success
/* change UNSEAL Key
2020-10-30 11:23:11 770 , 16 , Wr Word , 00 , 2 , 0035 , Success
2020-10-30 11:23:13 455 , 16 , Wr Block , 44 , 10 , 35 00 34 12 78 56 FF FF FF FF  , Success
/* read Key
2020-10-30 11:23:16 096 , 16 , Wr Word , 00 , 2 , 0035 , Success
2020-10-30 11:23:17 154 , 16 , Rd Block , 23 , 16 , 14 04 72 36 FF FF FF FF 57 28 98 2A 14 2B 8A 2C  , Success
Hans