SLUUBT5C November 2018 – June 2021 BQ40Z80
The Emergency FET Shutdown function provides an option to disable the battery power to the system by opening up the CHG and DSG FETs before removing an embedded battery pack. There are two ways to enter the EMERGENCY FET SHUTDOWN state:
When the gauge is in the EMERGENCY FET SHUTDOWN state, the OperationStatus()[EMSHUT] = 1.