Power Pins

• Vin - this is the power pin. Since the sensor chip uses 3.3 VDC, we have included a voltage regulator on board that will take 3-5VDC and safely convert it down. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 5V microcontroller like Arduino, use 5V
• 3Vo - this is the 3.3V output from the voltage regulator, you can grab up to 100mA from this if you like
• GND - 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.
• STEMMA QT - These connectors allow you to connectors to dev boards with STEMMA QT connectors or to other things with various associated accessories

Other Common Pins

• IA1 - Tthe accelerometer's first interrupt pin. 3V logic only
• IA2 - The accelerometer's second interrupt pin. 3V logic only

LSM303AGR Only

• INTM - The interrupt pin for the magnetometer. 3V logic only
• CSA - The accelerometer's CS pin. 3V logic only
• CSM - The magnetometer's CS pin. 3V logic only

LSM303DLH Only

• DRDY - This is the data ready pin. 3V logic only