BMI160 Detailed explanation of pin function specifications and circuit principle instructions

The BMI160 is a Sensor module manufactured by Bosch Sensortec. It is a MEMS (Micro-Electromechanical Systems) sensor that integrates an accelerometer and a gyroscope on a single chip. This component is often used in various applications such as motion sensing, navigation systems, gaming devices, and other wearables.

Let's break down your request into multiple sections:

1. Package and Pin Configuration:

The BMI160 typically comes in a LGA (Land Grid Array) package, with either a 14-pin or 16-pin package depending on the specific version. A detailed table of pin functions for each pin will be outlined below based on the 14-pin package.

2. Pin Function List for BMI160 (14-pin Package Example):

Pin Number Pin Name Function 1 VDD Power supply pin (typically 1.8V or 3.3V) for the BMI160 sensor. 2 GND Ground connection for the sensor. 3 SCL Serial Clock Line for I2C communication, responsible for providing the clock signal. 4 SDA Serial Data Line for I2C communication, responsible for data transmission between the sensor and the microcontroller. 5 CS Chip Select pin for SPI communication. Used to enable or disable the SPI interface . 6 SDI Serial Data Input for SPI communication (data sent to the sensor). 7 SDO Serial Data Output for SPI communication (data sent from the sensor). 8 INT1 Interrupt 1 output pin. Can be configured to output different interrupt signals (motion, thresholds, etc.). 9 INT2 Interrupt 2 output pin. Similar to INT1, it can output different interrupt signals, such as for specific events or status changes. 10 NC Not connected. This pin is not used and is left floating in the package. 11 VDDIO IO voltage pin for the sensor’s digital interface. 12 VDDIOH High voltage power supply for the logic interfaces, can typically be set to 1.8V or 3.3V depending on the operating mode. 13 NC Not connected. 14 GND Ground pin (same as Pin 2) for the digital interface.

3. Pin Function 20 FAQ:

Here are 20 common questions (FAQs) about the BMI160, formatted in a Q&A style. These questions cover the functionality of the pins, general queries about the sensor, and more.

1. What is the power supply requirement for the BMI160? The BMI160 requires a power supply of either 1.8V or 3.3V, provided through the VDD pin.

2. What communication interfaces are supported by the BMI160? The BMI160 supports I2C and SPI communication interfaces.

3. How do I select between I2C and SPI communication? The communication interface is selected using the CS (Chip Select) pin. When CS is low, SPI is enabled, while I2C is selected when CS is high.

**4. What is the function of the *SCL* and SDA pins?** The SCL pin is for the clock signal in I2C communication, and the SDA pin carries data to and from the sensor.

5. Can I use both I2C and SPI at the same time? No, you can only use one interface at a time. The selection is made by controlling the CS pin.

6. How do I configure the interrupt pins on the BMI160? Interrupts are configured through INT1 and INT2 pins, and the interrupt behavior can be set via software.

**7. What is the voltage range for the *VDD* pin?** The VDD pin supports a voltage range of 1.8V to 3.6V, depending on the configuration.

8. How do I enable interrupts for motion detection? Interrupts can be configured through the INT1 or INT2 pins using specific settings in the sensor’s register map for motion detection.

**9. What does the *SDO* pin do?** The SDO pin outputs the data from the sensor during SPI communication.

**10. What is the purpose of the *NC* pins?** The NC (Not Connected) pins are unused and should be left floating.

11. How do I connect the BMI160 to a microcontroller? You can connect the BMI160 via either I2C or SPI, depending on your preferred communication protocol, using the appropriate pins (SCL, SDA, SDI, SDO, CS).

12. Is there any specific wiring for the ground pin? Yes, ensure that GND is properly connected to the ground of your microcontroller or system.

**13. Can I use *VDD* and VDDIOH interchangeably?** No, VDD powers the sensor itself, while VDDIOH is used to power the logic interfaces, and they serve different purposes.

**14. How should the *INT1* pin be used?** The INT1 pin can be configured to output interrupt signals for various events, such as threshold crossing, motion detection, etc.

15. Can I use more than one interrupt at the same time? Yes, you can configure both INT1 and INT2 pins to output different types of interrupts simultaneously.

16. What is the minimum operating voltage for the BMI160? The BMI160 can operate with a minimum voltage of 1.8V.

17. How do I set the interrupt threshold? The interrupt threshold can be configured in the BMI160’s register map, typically based on accelerometer or gyroscope data.

18. Does the BMI160 require an external oscillator? No, the BMI160 has an internal oscillator that eliminates the need for an external one.

19. What is the maximum operating temperature for the BMI160? The BMI160 operates within a temperature range of -40°C to +85°C.

20. Can the BMI160 be used in automotive applications? Yes, the BMI160 is designed for consumer electronics, but it can be used in automotive applications with proper validation and integration.

This detailed guide offers a comprehensive overview of the BMI160 sensor pin functions, communication interfaces, and other frequently asked questions. If you need further specifications, feel free to reach out!