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BQ78350 unseal cmd

David Park
Expert 6710 points
Other Parts Discussed in Thread: BQ76920, BQSTUDIO

Hi,

With BQ76920 EVM, 20V is connected to Cell+-.

In BQstudio, Cell1,2,5 is around 4V and 3, 4 is 0V.

It seems to be AFE cell map setting so Cell1~5 are all set.

But Cell3,4 voltage is still 0V.

I think it is due to seal. 

But Unseal cmd seems to be not work.

Is additional cmd needed?

Or Is it not a seal problem?

Thanks.

  • 0
    TI__Guru 73830 points
    You should just have to enter the Unseal and Full Access codes to access and update the data memory. You can try turning the Dashboard and Scanning off to make sure that they are not interfering. Have you checked all of the cell voltages at the device to make sure that they are good?