I am checking a design where the ADXL362 is battery powered, but is being used control power to the MCU it talks via the SPI bus (motion switch).The designer thinks this is a valid application. I haven't seen a reference application for this. I am concerned with SPI I/O being tied to a powered down MCU and unknows initialisation of the ADXL362.
Is this practical or troblesome? Is there a reference design to use ADXL362 this way?