Figure 5. Addressing Procedure Example - STMicroelectronics AEK-POW-BMS63EN User Manual

To determine if the addressing procedure has been successful, check the D2 LED on the BMS. If it remains
always on, it means that the procedure has been correctly executed and each BMS has its own ID. Only if you
unplug the connector, the BMS loses their ID.
1.3.2.3 Normal state
In this state, all references are powered. ADCs and interfaces are ready for measurement and data transmission,
respectively.
The commands sent by the microcontroller can be read from both ISO lines and SPI pins.
When receiving a valid command, the L9963E executes the corresponding operations, such as voltage, current,
and overtemperature measurements.
Some safety operations (OV, UV, OT, and VBAT monitoring) are automatically checked in background.
If the communication with the MCU is missing for t > t_SLEEP (programmable via CommTimeout, maskable via
comm_timeout_dis) or a GO2SLP command is received, the device moves either to the sleep state or to the silent
balancing state, depending on the slp_bal_conf bit and balancing state.
1.3.2.4 Silent balancing state
In this state, one or more cells are balanced with a reduced current consumption with respect to the normal state.
Active resources are the same as the ones of the sleep state plus the balance drivers and the necessary bias
circuitry.
To enter the silent balancing state from the normal state, check the following conditions:
1. Cell balancing must be on.
2. The slp_bal_conf flag has to be set to 1.
3. Verify the "go to sleep" condition (an explicit GO2SLP command or communication timeout expiration).
If cell balancing is previously requested in the normal state and the slp_bal_conf flag is set to 1, when a condition
to go to sleep (low consumption) occurs, the device enters the silent balancing state.
To exit from the silent balancing state, there are three possible events:
UM3185 - Rev 1
Figure 5. Addressing procedure example
UM3185
Voltage operating range
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