Power Pins

• VIN - this is the power pin. Since the sensor chip uses 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 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 I2C data line. This pin is level shifted so you can use 3-5V logic, and there's a 10K pullup on this pin.
  

Optional:

• STEMMA QT - A solderless alternative to the Vin, GND, SCL, and SDA pins. These connectors allow you to connectors to dev boards with STEMMA QT connectors and various associated accessories
• DI - I2C Address pin. Pulling this pin high will change the I2C address from 0x4A to 0x4B

UART Logic Pins

• SCL - UART data IN to sensor - Connect to your microcontroller TX pin
• SDA - UART data OUT from sensor - Connect to your microcontroller RX pin

SPI Logic pins:

• SCL - This is also the SPI Clock pin / SCK, it's an input to the chip
• SDA - Doubles as the Data Out / Microcontroller In Sensor Out / MISO pin, for data sent from the BNO08x
• DI - Datal In / Microcontroller Out Sensor In / MOSI pin, for data sent from your processor to the BNO08x
• CS - this is the Chip Select pin, pull it low to start an SPI transaction. It's an input to the chip
• INT - Interrupt- Active Low. Indicates that the BNO085 needs the host's attention. Required for stable SPI operation
• RST- Reset- Active Low - Pull low to GND to reset the sensor. Required for stable SPI operation

Other Pins

• P0/P1 Pins and Solder Jumpers - Mode select. Use these pins to set the BNO085's operating mode according to the table below. Both pins are pulled low by default, defaulting to I2C
• RST- Reset, Active Low. Pull low to GND to reset the sensor
• INT - Interrupt/Data Ready-Active Low pin. Indicates that the BNO085 needs the host's attention
• BT- Bootloader pin used to put the sensor in bootloader. EXPERT USERS should consult the datasheet for more information. If you don't know what this you probably want to just leave it be or risk damaging your sensor