An abnormal current draw on the CS pin (Pin 5) is observed when ADBMS6821 is configured in Peripheral Mode (MSTR = GND) of the ADBMS6821 when CS is driven low by the user, but is not present when the device is set to Controller Mode (MSTR tied to VDD), where the CS pin operates normally with negligible current draw. This is expected. The CS pin is configured as an output in Peripheral Mode, which means it cannot be driven low by the user. Instead, it sources current to ground as it outputs signals based on the ISO-SPI communication. The CS pin's behavior is expected in this mode, as it is controlled by the master device in a master/slave configuration.