BQ27Z561-R2: Whether Qmax will influence Checksum

Fabio Gou

Part Number: BQ27Z561-R2

Tool/software:

Could you help to confirm when the customer only modify the value of Qmax, whether the check sum will be modified at the same time?

over 1 year ago

0 Adrian over 1 year ago

TI__Mastermind 37761 points

Hello Fabio,

Modifying the Qmax value should not modify IFchecksum, StaticDFSignature or AllDFSignature.

Regards,

Nick Richards

0 Fabio Gou over 1 year ago in reply to Adrian

TI__Expert 4405 points

So what kind of register modification or command will modify the checksum?

0 Adrian over 1 year ago in reply to Fabio Gou

TI__Mastermind 37761 points

Hello Fabio,

StaticDFSignature and IFchecksum should not change. I will have to check AllDFSignature.

Regards,

Nick

0 Fabio Gou over 1 year ago in reply to Adrian

TI__Expert 4405 points

Thanks for your double confirmation.

0 Fabio Gou over 1 year ago in reply to Adrian

TI__Expert 4405 points

Whether we have some document explain the when StaticDFSignature / IFchecksum/AllDFSignature will be modified.

0 Adrian over 1 year ago in reply to Fabio Gou

TI__Mastermind 37761 points

Hello Fabio,

We do not have documentation, but I just asked firmware team and they told me that AllDFSignature is a user programmed value that can be used in production to verify that data memory was programmed correctly. The user can define their own checksum value for the entire data memory and that can be programmed as the AllDFSignature. Then in production, the checksum can be calculated after programming and then compared to the AllDFSignature.

Regards,

Nick Richards

Power management

Power management forum

BQ27Z561-R2: Whether Qmax will influence Checksum