The BNO055 is a motion sensor developed by Bosch, and it is part of their sensor series used for orientation, acceleration, and gyroscopic motion tracking. Here is a detailed explanation regarding the BNO055 pinout, pin functions, and frequently asked questions. This type of sensor is typically in a package with 9 or more pins depending on the specific configuration. Below is the complete breakdown of the BNO055 pinout and the required FAQ in English.
BNO055 Pinout and Pin Function List
The BNO055 sensor typically comes in a 10-pin or 9-pin package, depending on the specific version (such as the BNO055 9-axis motion sensor). Below is the detailed description of the pin functions.
Pinout Diagram1. Pin 1 - VDD ( Power Supply)
Function: This pin provides the supply voltage to the sensor. Typically, this voltage is 3.3V or 5V depending on the operating requirements of the sensor. Recommended Voltage: 3.3V or 5V.2. Pin 2 - GND (Ground)
Function: This pin serves as the ground reference for the sensor. It must be connected to the common ground of the system.3. Pin 3 - SDA (I2C Data)
Function: This pin is used for I2C communication to transfer data between the BNO055 and the microcontroller. It is the data line for I2C.4. Pin 4 - SCL (I2C Clock )
Function: This is the clock line for I2C communication. The clock signal is sent to synchronize data transfer between the sensor and the microcontroller.5. Pin 5 - INT (Interrupt)
Function: The interrupt pin can signal the microcontroller to notify it about a specific event, such as data ready or a change in the sensor's state.6. Pin 6 - RST (Reset)
Function: This pin is used to reset the BNO055 sensor. When a logic low is applied, the device will reset, and all internal registers will be cleared.7. Pin 7 - PS0 (Primary I2C or SPI Select)
Function: This pin is used to select between I2C and SPI communication interface s. A logic low selects I2C, and a logic high selects SPI.8. Pin 8 - PS1 (Secondary Interface Select)
Function: This pin also contributes to interface selection and must be configured alongside PS0 for proper operation.9. Pin 9 - SDO (I2C Slave Address)
Function: This pin is used to change the I2C address of the sensor. By toggling this pin, you can select one of two possible I2C addresses.10. Pin 10 - NC (No Connection)
Function: This pin is unused and not connected to any internal circuitry. It may be reserved for future use or to maintain a standard pinout.BNO055 Pin Function Table
Pin Number Pin Name Function Description 1 VDD Power supply for the sensor, 3.3V or 5V 2 GND Ground pin, common reference for the system 3 SDA I2C data line for communication 4 SCL I2C clock line for communication 5 INT Interrupt output pin for signaling events 6 RST Reset pin for initializing the sensor and clearing registers 7 PS0 Interface selection pin for I2C or SPI (Primary) 8 PS1 Secondary interface selection pin, works in conjunction with PS0 9 SDO I2C slave address selection pin 10 NC No Connection, not used in operation20 Frequently Asked Questions (FAQ)
1. What is the supply voltage for the BNO055?
The BNO055 operates at a supply voltage of either 3.3V or 5V depending on the setup.2. Can the BNO055 be used with both I2C and SPI interfaces?
Yes, the BNO055 supports both I2C and SPI communication. The interface is selected using the PS0 and PS1 pins.3. How do I reset the BNO055 sensor?
The reset is triggered by applying a logic low signal to the RST pin.4. What does the INT pin do on the BNO055?
The INT pin is used for sending interrupt signals from the sensor to the microcontroller, indicating events like new data being available.5. What is the function of the SDO pin?
The SDO pin is used to change the I2C slave address. By toggling this pin, you can select between two I2C addresses.6. What is the difference between PS0 and PS1 pins?
PS0 selects between I2C or SPI, while PS1 is used to further configure interface settings and must be used in conjunction with PS0.7. Can I use the BNO055 with a 3.3V power supply?
Yes, the BNO055 supports 3.3V as its supply voltage.8. What does the SDA pin do?
The SDA pin is the I2C data line used for transmitting data between the BNO055 and the microcontroller.9. How does I2C communication work with the BNO055?
The SDA and SCL pins are used for I2C communication. The SCL pin sends clock pulses while the SDA pin transfers data.10. Can I connect the BNO055 to a 5V system?
Yes, the BNO055 is compatible with a 5V system, as long as the voltage levels are within the specified range.11. What does the SCL pin do?
The SCL pin is the I2C clock line used to synchronize data transfer between the BNO055 and the microcontroller.12. How do I interface with the BNO055 using SPI?
To use SPI, configure the PS0 pin to a logic high state and use the MISO, MOSI, SCK, and CS pins for data transfer.13. What happens when I apply a logic low to the RST pin?
A logic low on the RST pin will reset the sensor, clearing internal registers and reinitializing the sensor.14. How many I2C addresses does the BNO055 have?
The BNO055 supports two I2C addresses, selectable via the SDO pin.15. Is the BNO055 suitable for outdoor use?
The BNO055 is typically designed for indoor applications but can be used outdoors in controlled environments.16. What happens if I don’t connect the INT pin?
If the INT pin is not connected, you won't receive interrupt signals from the BNO055, but the sensor will still function normally.17. Can I use the BNO055 with a microcontroller?
Yes, the BNO055 is designed to interface with microcontrollers through either I2C or SPI.18. What should I do if the sensor doesn’t respond?
Check the power supply, ensure proper I2C or SPI communication, and verify correct pin connections, especially for reset and interrupt functionality.19. What is the range of the BNO055 accelerometer?
The accelerometer range is typically ±2g, ±4g, ±8g, and ±16g, depending on the configuration.20. What is the purpose of the NC pin?
The NC pin is a no-connection pin, meaning it does not perform any function and can be ignored.This explanation is a detailed overview of the BNO055 sensor's pin functions and common questions related to it. I hope it helps!
