BQ27Z561EVM-011:How to unseal

Jinmyeong Byeon

Part Number: BQ27Z561EVM-011
Other Parts Discussed in Thread: EV2400

Tool/software:

Hi,

I'm testing with the EV2400 and BQ27Z561-EVM, but once the device gets sealed, I'm unable to modify any values. Could you please let me know how to unseal it?

3 months ago

0 Alan Frias 3 months ago

TI__Mastermind 25225 points

Hello Jinmyeong,

You can use the "UNSEAL_FULL_ACCESS" button in the lower right hand corner to unseal the gauge and you can also reference this e2e below as well.

E2E:
https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/911872/bq27z561evm-011-unseal-and-full-access

Thank you,
Alan

0 Jinmyeong Byeon 3 months ago in reply to Alan Frias

Prodigy 40 points

Hello Alan!!

Thanks for your support!!

When I press the Reset button in the Command window, it switches back to SEAL mode. Is this expected behavior? Also, sometimes pressing the UNSEAL or UNSEAL_FULL_ACCESS buttons in the Command window successfully unlocks the device, but other times it doesn’t. Is there a specific procedure required to unlock it?

0 Alan Frias 3 months ago in reply to Jinmyeong Byeon

TI__Mastermind 25225 points

Jinmyeong Byeon said:
When I press the Reset button in the Command window, it switches back to SEAL mode.

-Resting the system revert the battery gauge back to it last known state so it can be typical to see it go back to seal mode

Jinmyeong Byeon said:
but other times it doesn’t.

-It could be the communication bus becomes to busy thus you can prevent this by having the system not "Scan" or "Auto refresh is ON - click to Turn OFF"

Thank you,
Alan

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BQ27Z561EVM-011:How to unseal