Datasheet

level is on Vin!

SCL - this is the SPI Clock pin, its an input to the chip

SDA - this is the Serial Data In / Master Out Slave In pin, for data sent from your processor to the LIS3DH

SDO - this is the Serial Data Out / Master In Slave Out pin, for data sent from the LIS3DH to your processor. It's

3.3V logic level out

CS - this is the Chip Select pin, drop it low to start an SPI transaction. Its an input to the chip

If you want to connect multiple LIS3DH's to one microcontroller, have them share the SDI, SDO and SCK pins. Then

assign each one a unique CS pin.

Other Pins

INT is the interrupt output pin. You can configure the interupt to trigger for various 'reasons' such as motion, tilt,

taps, data ready etc. This pin is 3.3V logic output.