STEVAL-MKI089V1 STMicroelectronics, STEVAL-MKI089V1 Datasheet - Page 35

• Manufacturer Part Number: STEVAL-MKI089V1
• Description: DEMO BOARD FOR LIS331DLH
• Manufacturer: STMicroelectronics
• Series: MEMS, nanor

Specifications of STEVAL-MKI089V1

• Sensor Type: Accelerometer, 3 Axis
• Sensing Range: ±2g, 4g, 8g
• Interface: I²C, SPI
• Sensitivity: 3.9mg/digit, 2mg/digit, 1mg/digit
• Embedded: No
• Utilized Ic / Part: LIS331DLH
• Acceleration: 2 g, 4 g, 8 g
• Sensing Axis: Triple Axis
• Interface Type: I2C, SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: LIS331DLH
• Other names: 497-10493

UM0701
7.6
7.6.1
Figure 20. STM32-MEMS LCD demonstration application running on
Application tips: inclination measurement
In this application, the acceleration is used to measure an inclination. This inclination is
related to the angle achieved by the gravity’s direction. Thus, if the device is put horizontally,
the gravity will induce a 1 g value on the z axis and the acceleration measured on the other
two axes will be equal to 0, meaning no angle (0°), no inclination.
Description
When there is no movement, the acceleration by default is called gravity and is always
present. On the surface of the earth, the gravity is around 9.81 m/s
Figure 21. Earth's gravity
If the device starts to move from the horizontal position, the gravity will no longer be equal to
1 on the z axis and a value on the x or y axis will be different to 0.
STM3210B_EVAL (left) and STM3210B_SK_IAR (right)
Doc ID 15703 Rev 1
Surface of the Earth
Earth's gravity = 1 g
9.81 m/s 2
STM32-MEMS development kit
2
(1 g).
35/42
A