The LSM6DSOXTR is a motion sensor from STMicroelectronics. It's a 3D accelerometer and 3D gyroscope sensor with a digital output and is part of the LSM6 family. It features an I2C/SPI interface and is commonly used in a variety of consumer electronics, including mobile devices, wearables, and automotive applications.
Package Information
The LSM6DSOXTR is available in a LGA (Land Grid Array) package with 14 pins. Each pin serves a specific purpose for Power , communication, and sensor outputs. Below is the detailed explanation of each pin and its corresponding functionality.
Pinout Description
Here’s the full pinout and the functionality of each pin for the LSM6DSOXTR in the 14-pin package:
Pin No. Pin Name Pin Function Description 1 VDDIO Power supply for the I/O voltage, typically 1.8V or 2.5V. 2 SCL / SDI I2C clock line or SPI data input line (if SPI mode is used). 3 SDA / SDO I2C data line or SPI data output line (if SPI mode is used). 4 CS Chip select for SPI communication. Must be pulled low to enable the sensor in SPI mode. 5 SDO SPI data output (for SPI interface) or I2C data line (shared with SDA pin). 6 INT1 Interrupt 1 output pin, used for signaling various conditions (e.g., movement detection). 7 INT2 Interrupt 2 output pin, used for signaling additional conditions. 8 VDD Power supply pin, typically connected to 2.5V or 3.3V (depending on application). 9 GND Ground pin for the sensor. 10 AGND Analog ground, used for powering the analog circuits inside the sensor. 11 VDDIOH Supply voltage for I/O pin, which can be used for higher voltage levels for certain pins. 12 GND Another ground pin, part of the package for multiple grounding options. 13 VDDIO2 Secondary supply voltage for specific I/O functions, such as digital interfaces. 14 XOUT Output for X-axis acceleration data. (Typically used with ADC or digital conversion.)Detailed Pin Functions
1. VDDIO: This pin is for the I/O voltage. It powers the communication pins (SCL, SDA, etc.) and supports voltage levels needed for communication with external devices. It’s typically powered at 1.8V or 2.5V. 2. SCL / SDI: In I2C mode, this pin serves as the clock line. In SPI mode, this pin acts as the data input line. It drives the serial clock in I2C, which synchronizes communication with the host device. 3. SDA / SDO: In I2C mode, this pin is the data line that carries sensor data to the microcontroller. In SPI mode, it functions as the data output pin, sending data from the sensor to the host. 4. CS: This pin is the chip select for SPI communication. It must be pulled low to activate the sensor in SPI mode. When high, the sensor remains inactive. 5. SDO: In SPI mode, this is the SPI data output pin. In I2C mode, it acts as the same data line as SDA (shared functionality). 6. INT1: Interrupt 1 output. This pin generates an interrupt when a specific condition, such as a motion threshold, is met. It is programmable to trigger on different sensor events. 7. INT2: Interrupt 2 output, similar to INT1, but can be set for different conditions or for more advanced event signaling. 8. VDD: Power supply pin, typically connected to a voltage of 2.5V or 3.3V to power the sensor core. 9. GND: The ground pin for the sensor. It provides a reference voltage for all other signals. 10. AGND: This is the analog ground pin, used specifically for grounding the analog part of the sensor, which includes the accelerometer and gyroscope. 11. VDDIOH: Provides the voltage supply for the high-level I/O pins. It is particularly useful for systems that require higher signal voltage levels. 12. GND: Another ground pin to provide additional grounding options for noise reduction. 13. VDDIO2: This pin is a secondary supply voltage for certain functions within the device and provides a separate voltage rail for more complex devices. 14. XOUT: This pin outputs the X-axis acceleration data from the accelerometer, typically converted to digital or analog data for processing by external systems.Frequently Asked Questions (FAQ) about LSM6DSOXTR
Q: What is the primary use of the LSM6DSOXTR sensor? A: The LSM6DSOXTR is a 3D accelerometer and 3D gyroscope sensor, primarily used for motion sensing, orientation detection, and gesture recognition in mobile devices, wearables, and automotive systems.
Q: How many pins does the LSM6DSOXTR have? A: The LSM6DSOXTR has a 14-pin package.
Q: What is the power supply voltage for the LSM6DSOXTR? A: The LSM6DSOXTR requires a 2.5V or 3.3V power supply (VDD).
Q: What communication protocols does the LSM6DSOXTR support? A: The LSM6DSOXTR supports both I2C and SPI communication protocols.
Q: What is the function of the CS pin? A: The CS (Chip Select) pin is used for SPI mode to activate or deactivate the sensor.
Q: How is the sensor powered? A: The LSM6DSOXTR is powered through the VDD pin, and the I/O voltage is supplied through the VDDIO pin.
Q: What does the INT1 pin do? A: The INT1 pin is used to signal interrupts based on certain events, such as motion detection or a specific threshold being reached.
Q: Can the LSM6DSOXTR be used for both motion sensing and vibration detection? A: Yes, the sensor can detect both motion and vibration, making it suitable for a wide range of applications such as activity tracking, gaming, and automotive use.
Q: What is the difference between the INT1 and INT2 pins? A: Both INT1 and INT2 serve as interrupt output pins, but they can be configured to trigger on different sensor conditions or thresholds.
Q: How do I select between I2C and SPI mode on the LSM6DSOXTR? A: The communication mode is selected by configuring the SDA and SCL pins for I2C or the CS pin for SPI mode.
Q: How many interrupts can be configured on the LSM6DSOXTR? A: The LSM6DSOXTR supports up to two interrupt pins (INT1 and INT2).
Q: What type of ground is required for the LSM6DSOXTR? A: The sensor requires two ground pins (GND and AGND), one for the digital circuits and one for the analog circuits.
Q: Can the sensor output analog signals? A: No, the sensor outputs digital signals via I2C or SPI communication.
Q: What is the role of the SDO pin? A: The SDO pin is used for SPI data output and also serves as the I2C data line in I2C communication mode.
Q: How do I interface with the LSM6DSOXTR using SPI? A: To interface using SPI, connect the CS, SDO, SDI, and SCL pins to the corresponding pins on the microcontroller and communicate according to the SPI protocol.
Q: Is the LSM6DSOXTR compatible with 5V systems? A: The LSM6DSOXTR operates with 1.8V to 3.6V, so it is not directly compatible with 5V logic without a level shifter.
Q: What is the XOUT pin used for? A: The XOUT pin is used to output X-axis acceleration data from the accelerometer.
Q: Can the LSM6DSOXTR be used in low-power applications? A: Yes, the LSM6DSOXTR is designed for low-power consumption, making it ideal for battery-operated devices.
Q: How does the LSM6DSOXTR detect motion? A: The sensor uses its integrated accelerometer and gyroscope to detect motion along multiple axes.
Q: What is the purpose of the VDDIOH pin? A: The VDDIOH pin provides the necessary voltage supply for high-level logic operations of certain I/O pins.
This response is comprehensive in terms of the pinout and pin functionality for the LSM6DSOXTR sensor, as well as addressing frequent questions regarding its usage and specifications.
