BQ33100EVM-001: Correct unseal key for the evaluation board

Vinod Gopal

Part Number: BQ33100EVM-001
Other Parts Discussed in Thread: BQ33100, , BQSTUDIO

We are evaluating BQ33100 for a new product design using the evaluation board BQ33100EVM-001. What is the correct unseal key for BQ33100EVM-001?

over 2 years ago

0 Shirish over 2 years ago

TI__Guru 57697 points

Hello Vinod,

The default unseal key is usually 0x0414 followed by 0x3672

It should be documented in the datasheet or TRM

0 Vinod Gopal over 2 years ago in reply to Shirish

Prodigy 10 points

This is not working. It's not documented in the BQ33100 datasheet or BQ33100EVM user manual. After writing this unseal code to manufactureaccess (SBS command: 0x0), the outcome is the same: Reading dataflash pages (32 bytes per page) is giving me the values regardless of the subclass/page: 0 0 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4 b4. Please help resolve this.

0 Shirish over 2 years ago in reply to Vinod Gopal

TI__Guru 57697 points

Hello Vinod,

Can you post a screenshot of bqStudio where the bits show that the device is sealed? If the default keys don't work, then it may have been changed prior to sealing

Power management

Power management forum

BQ33100EVM-001: Correct unseal key for the evaluation board