The recommended power-on sequence is to apply VDD first, followed by VDDIO, and then the clock signal. This ensures proper initialization of the device.
To configure the LIS331DLH for low-power mode, set the LPEN bit in the CTRL_REG1 register to '1'. This reduces the current consumption to approximately 10 μA.
The self-test feature in the LIS331DLH is used to verify the integrity of the sensor and the analog-to-digital converter (ADC). It applies a known acceleration to the sensor and checks the output to ensure it is within specifications.
The LIS331DLH generates interrupts when certain events occur, such as exceeding a specified acceleration threshold. To handle interrupts, configure the INT1 and INT2 pins as inputs, and use an external interrupt controller or a microcontroller to handle the interrupt requests.
To minimize noise and ensure reliable operation, keep the LIS331DLH away from high-current and high-frequency signals. Use a ground plane under the device, and route the VDD and VDDIO lines separately to minimize noise coupling.
LIS331DLH datasheet
by STMicroelectronics
