BQ40Z50-R1: Security Mode changes when updating Unseal and Full Access Codes

Ephraim Suazo

Part Number: BQ40Z50-R1

I have updated my original SREC golden file to change the Unseal and Full Access codes. After updating these codes the new SREC shows the pack as sealed when prior to update it was unsealed.

Any idea why the Sealed status would be permanently changed when updating the Unseal and Full Access codes?

Thanks ahead of time for any help on this.

over 6 years ago

0 Batt over 6 years ago

TI__Mastermind 42535 points

Hi Ephraim,

If the srec was exported from a previously sealed device, flashing the same on a new gauge would make the new gauge sealed as well.

0 Ephraim Suazo over 6 years ago in reply to Batt

Prodigy 105 points

Sorry mate - Guess I did not make this clear; The pack was loaded with a golden file that was unsealed. After updating the security keys the pack seemed to have gone into a sealed state permanently.

0 Batt over 6 years ago in reply to Ephraim Suazo

TI__Mastermind 42535 points

That is unlikely unless the seal command was sent. Changing keys does not affect the seal unseal bit config.

If you would like us to look into it further, please attach your srec.

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BQ40Z50-R1: Security Mode changes when updating Unseal and Full Access Codes