Hi zkz,
In BHI260, accel and gyro can be accessed through the same SPI interface. BHI260 has AUX inside, which can access the BMM150 through the AUX interface. The host can still access the BMM150 indirectly through SPI. Therefore, the same SPI can access accel, gyro and BMM150.
In addition, 25 is the CS inside BHI260.
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