Hi Bimalsinh,
We do not recommend using it this way: turn off the BMA400 power supply and continue communicating on I2C. Because theoretically the BMA400 power supply has been turned off, it is uncertain whether the high level on the I2C pin will affect the sensor. We have tested this and it is an abnormal operation. If you do not use BMA400, you can set BMA400 to sleep mode, with a power consumption of only 160nA. For battery powered products, the current consumption is already very small.
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