The LIS2HH12TR is a model of a motion Sensor manufactured by STMicroelectronics, which belongs to their line of MEMS (Microelectromechanical Systems) sensors. Specifically, the LIS2HH12TR is an ultra-low- Power , 3-axis accelerometer designed for various applications like motion sensing and orientation detection in portable devices, consumer electronics, automotive, and industrial systems.
Package Type:
The LIS2HH12TR is typically available in a LGA (Land Grid Array) package with 12 pins. This model is designed to be small, highly integrated, and low-power, which makes it suitable for mobile and battery-operated applications.
Pinout Functions and Descriptions:
Below is a detailed list of the pin functions for the LIS2HH12TR in a 12-pin configuration. The functions of each pin are described below.
Pin Number Pin Name Function Description 1 VDD Power supply voltage pin, typically 1.7V to 3.6V for operation. This is the main power input pin for the accelerometer. 2 GND Ground pin. This is the reference for the power supply. It is used to complete the electrical circuit. 3 SCL I²C Clock input. This pin is used for the serial clock in I²C communication. It works in conjunction with the SDA pin to control data transmission. 4 SDA I²C Data input/output. This pin is used for data transmission in I²C communication along with the SCL pin. 5 INT1 Interrupt 1 pin. This pin is used to signal an interrupt based on specific sensor events (e.g., threshold crossing, free fall). It can be configured for output. 6 INT2 Interrupt 2 pin. Similar to INT1 but used for different interrupt conditions or as a second interrupt line. It can also be configured for output. 7 CS Chip Select pin for SPI communication mode. This pin is used to enable or disable SPI communication with the device. 8 SDO/SA0 SPI Data output pin or I²C address selection pin. For SPI communication, this pin transmits data. In I²C mode, it selects the I²C address. 9 N.C. Not connected (or NC) pin. This pin has no function and can be left floating. 10 SENSOR_OUT Analog or digital output depending on the mode set for the sensor. It provides the measurement data of the accelerometer's axes (X, Y, Z). 11 REF Reference voltage pin for analog output, typically set at half the supply voltage for proper operation. 12 VDD_IO Input/output voltage supply pin for I/O logic. Ensures compatibility between the sensor's internal logic and the microcontroller or external device connected to it.Full Pin Function Breakdown:
VDD - Power supply for the sensor. GND - Ground. SCL - I²C clock signal. SDA - I²C data signal. INT1 - Interrupt 1 (customizable output). INT2 - Interrupt 2 (customizable output). CS - Chip Select (for SPI). SDO/SA0 - Data output or address select. N.C. - Not connected. SENSOR_OUT - Main data output (analog or digital). REF - Reference voltage. VDD_IO - Input/output voltage supply for logic.FAQ for the LIS2HH12TR Accelerometer
Q: What is the supply voltage range for the LIS2HH12TR? A: The supply voltage range for the LIS2HH12TR is 1.7V to 3.6V.
Q: Can I use the LIS2HH12TR with I²C or SPI? A: Yes, the LIS2HH12TR supports both I²C and SPI communication protocols.
Q: What are the interrupt pins on the LIS2HH12TR? A: The LIS2HH12TR has two interrupt pins: INT1 and INT2. These can be configured for different interrupt conditions.
Q: What is the function of the SDO/SA0 pin? A: The SDO/SA0 pin is used for SPI data output or I²C address selection.
Q: Does the LIS2HH12TR provide analog output? A: Yes, the LIS2HH12TR provides analog output depending on the configuration of the SENSOR_OUT pin.
Q: How do I configure the LIS2HH12TR for SPI mode? A: To configure the LIS2HH12TR for SPI mode, set the CS pin low to enable SPI communication, and configure the SDO/SA0 pin as needed.
Q: What is the operating temperature range for the LIS2HH12TR? A: The operating temperature range for the LIS2HH12TR is -40°C to +85°C.
Q: Can I power the LIS2HH12TR with a 5V supply? A: No, the LIS2HH12TR requires a supply voltage between 1.7V and 3.6V, so 5V would be too high.
Q: What is the resolution of the accelerometer? A: The LIS2HH12TR provides a resolution of 0.61mg/LSB at ±2g mode.
Q: How can I configure the interrupt conditions? A: The interrupt conditions for INT1 and INT2 can be configured through the device's control registers.
Q: What is the power consumption of the LIS2HH12TR? A: The LIS2HH12TR has a low power consumption, with typical values of 1µA in low-power modes.
Q: How do I read the sensor data? A: Sensor data can be read via I²C or SPI communication, depending on the configuration.
Q: Can I use the LIS2HH12TR in a battery-powered device? A: Yes, the LIS2HH12TR is ideal for battery-powered devices due to its low power consumption.
Q: What is the maximum output data rate for the LIS2HH12TR? A: The maximum output data rate is 1.6kHz in normal mode.
Q: Does the LIS2HH12TR support motion detection? A: Yes, the LIS2HH12TR supports motion detection features, including free fall detection and wake-up detection.
Q: What is the default I²C address of the LIS2HH12TR? A: The default I²C address is 0x18, but it can be changed by configuring the SDO/SA0 pin.
Q: Can the LIS2HH12TR be used for orientation detection? A: Yes, the LIS2HH12TR can be used for orientation detection based on its 3-axis accelerometer data.
Q: What are the key advantages of using the LIS2HH12TR? A: The key advantages include ultra-low power consumption, small size, and high accuracy for motion sensing.
Q: How accurate is the LIS2HH12TR's accelerometer? A: The accelerometer has an accuracy of ±2g, ±4g, ±8g, and ±16g, with selectable ranges.
Q: How do I configure the output data format? A: The output data format can be configured through the device's control registers, which can be set via I²C or SPI.
These functions and FAQs should provide comprehensive guidance for the LIS2HH12TR sensor's capabilities and usage in various applications.