The default I2C address for this board is 0x53.
Power Pins
The sensor on the breakout requires between a 2.0V and 3.6V, but it can be easily used with most microcontrollers from an Arduino to a Feather or something else.
- VIN - This is the power pin. To power the board, give it the same power as the logic level of your microcontroller - i.e. for a 5V micro like Arduino, use 5V, or for a 3V micro like a Feather, use 3V.
- 3Vo - This is the 3.3V output from the voltage regulator. You can grab up to 100mA from this if you like.
- GND - This is common ground for power and logic.
I2C Logic Pins
- SCL - I2C clock pin, connect to your microcontroller's I2C clock line. This pin is level shifted so you can use 3-5V logic, and there's a 10K pullup on this pin.
- SDA -I2C data pin, connect to your microcontroller's I2C data line. This pin is level shifted so you can use 3-5V logic, and there's a 10K pullup on this pin.
- CS - This is the Chip Select pin. It is tied to 3V by default to enable I2C mode.
- STEMMA QT - These connectors allow you to connect to development boards with STEMMA QT connectors, or to other things, with various associated accessories.
SPI Logic Pins
- SCL - This is the SPI Clock pin. It's an input to the chip.
- SDA - This is the Serial Data In / Microcontroller Out Sensor In pin. It is for data sent from your microcontroller to the accelerometer.
- SDO - This is the Serial Data Out / Microcontroller In Sensor Out pin. It is for data sent from the accelerometer to your microcontroller.
- CS - This is the Chip Select pin. When in SPI mode, it is controlled by the SPI bus. Drop this pin low to start a SPI transaction. It's an input to the chip.
Other Pins
- INT / I2 - These are the two interrupt pins. You can configure the interrupt to trigger on multiple things such as threshold detection, shock detection and data ready. You can map any of the interrupts independently to each pin.
