SLUSE97 November 2023 BQ76905
PRODUCTION DATA
The BQ76905 device includes two security modes: SEALED and FULLACCESS, which can be used to limit the ability to view or change settings.
Selected settings in the device can be modified while the device is in operation through supported commands and subcommands, but to modify all settings, the device must enter CONFIG_UPDATE mode (see CONFIG_UPDATE Mode), which stops device operation while settings are being updated. After the update is completed, the operation is restarted using the new settings. CONFIG_UPDATE mode is only available in FULLACCESS mode.
The BQ76905 device implements a key-access scheme to transition between SEALED and FULLACCESS modes. Changing from SEALED to FULLACCESS requires that a unique set of keys be sent to the device through subcommands. Refer to the BQ76905 Technical Reference Manual for more details.