Hi Gianlucamilani,
The maximum working voltage of VDDIO domain is 1.89v, and 3.3V cannot be used.
VDDIO can use 1.8V power supply and VDD can use 3.3V power supply. If your host MCU uses 3.3V power supply, the connection between the host MCU and the BHI260AP requires bidirectional level conversion. If your host MCU uses 1.8V power supply, there is no need for level conversion.
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