ST LIS3LV02DL User Manual

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3-axis - ±2g/±6g digital output low voltage linear accelerometer

Features

■ 2.16 V to 3.6 V single supply operation

■ 1.8 V compatible IOs

■ I

C/SPI digital output interfaces

■ Programmable 12 or 16 bit data representation

■ Interrupt activated by motion

■ Programmable interrupt threshold

■ Embedded self test

■ High shock survivability

■ ECOPACK® compliant (see Section 9)

Description

LIS3LV02DL

MEMS inertial sensor

LGA-16

The LIS3LV02DL has a user selectable full scale of ±2g, ±6g and it is capable of measuring acceleration over a bandwidth of 640 Hz for all axes. The device bandwidth may be selected accordingly to the application requirements.

The self-test capability allows the user to check the functioning of the device.

The LIS3LV02DL is a three axes digital output linear accelerometer that includes a sensing element and an IC interface able to take the information from the sensing element and to provide the measured acceleration signals to the external world through an I

C/SPI serial interface.

The sensing element, capable of detecting the acceleration, is manufactured using a dedicated process developed by ST to produce inertial sensors and actuators in silicon.

The IC interface instead is manufactured using a CMOS process that allows high level of integration to design a dedicated circuit which is factory trimmed to better match the sensing element characteristics.

The device may be also configured to generate an inertial wake-up/free-fall interrupt signal when a programmable acceleration threshold is crossed at least in one of the three axes.

The LIS3LV02DL is available in plastic SMD package and it is specified over a temperature range extending from -40°C to +85°C.

The LIS3LV02DL belongs to a family of products suitable for a variety of applications:

– Free-Fall detection – Motion activated functions in portable

terminals – Antitheft systems and Inertial navigation – Gaming and virtual reality input devices – Vibration monitoring and compensation

Table 1. Device summary

Order code

LIS3LV02DL -40 to +85 LGA-16 Tray

LIS3LV02DLTR -40 to +85 LGA-16 Tape and reel

Operating temperature

range [° C]

Package Packing

January 2008 Rev 2 1/48

www.st.com

Content LIS3LV02DL

Content

1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.2 LGA-16 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2 Mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . 10

2.1 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.3 Communication interface characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.3.1 SPI - serial peripheral interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.3.2 I2C - Inter IC control interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.4 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.5 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.5.1 Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.5.2 Zero-g level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.5.3 Self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3 Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.1 Sensing element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.2 IC interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.3 Factory calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.1 Soldering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5 Digital interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.1 I2C serial interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.1.1 I2C operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.2 SPI bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.2.1 SPI read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.2.2 SPI write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.2.3 SPI Read in 3-wires mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6 Register mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

2/48

LIS3LV02DL Content

7 Register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.1 WHO_AM_I (0Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.2 OFFSET_X (16h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.3 OFFSET_Y (17h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.4 OFFSET_Z (18h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.5 GAIN_X (19h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.6 GAIN_Y (1Ah) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.7 GAIN_Z (1Bh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.8 CTRL_REG1 (20h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.9 CTRL_REG2 (21h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7.10 CTRL_REG3 (22h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.11 HP_FILTER_RESET (23h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.12 STATUS_REG (27h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.13 OUTX_L (28h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.14 OUTX_H (29h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.15 OUTY_L (2Ah) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.16 OUTY_H (2Bh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.17 OUTZ_L (2Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.18 OUTZ_H (2Dh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.19 FF_WU_CFG (30h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.20 FF_WU_SRC (31h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.21 FF_WU_ACK (32h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

7.22 FF_WU_THS_L (34h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

7.23 FF_WU_THS_H (35h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

7.24 FF_WU_DURATION (36h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.25 DD_CFG (38h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.26 DD_SRC (39h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

7.27 DD_ACK (3Ah) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

7.28 DD_THSI_L (3Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

7.29 DD_THSI_H (3Dh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

7.30 DD_THSE_L (3Eh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

7.31 DD_THSE_H (3Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

3/48

Content LIS3LV02DL

8 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8.1 Mechanical characteristics at 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8.2 Mechanical characteristics derived from measurement in the -40°C to +85°C

temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.3 Electro-mechanical characteristics at 25°C . . . . . . . . . . . . . . . . . . . . . . . 44

9 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

4/48

LIS3LV02DL List of figures

List of figures

Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 2. Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 3. SPI slave timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 5. LIS3LV02DL electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 6. Read and write protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 7. SPI read protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 8. Multiple bytes SPI read protocol (2 bytes example) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 9. SPI write protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 10. Multiple bytes SPI write protocol (2 bytes example) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 11. SPI read protocol in 3-wires mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 12. X-axis zero-g level at 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 13. X-axis sensitivity at 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 14. Y-axis zero-g level at 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 15. Y-axis sensitivity at 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 16. Z-axis zero-g level at 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 17. Z-axis Sensitivity at 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 18. X-axis zero-g level change vs. temperature at 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 19. X-axis sensitivity change vs. temperature at 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 20. Y-axis zero-g level change vs. temperature at 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 21. Y-axis sensitivity change vs. temperature at 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 22. Z-axis zero-g level change vs. temperature at 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 23. Z-axis sensitivity change vs. temperature at 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 24. X and Y axis zero-g level as function of supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 25. Z axis zero-g level as function of supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 26. Current consumption in Power-Down mode (Vdd=3.3 V) . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 27. Current consumption in operational mode (Vdd=3.3 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 28. LGA-16 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

5/48

List of tables LIS3LV02DL

List of tables

Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Table 3. Mechanical characteristics @ Vdd=3.3 V, T=25 °C unless otherwise noted . . . . . . . . . . . . 5

Table 4. Mechanical characteristics @ Vdd=2.5 V, T=25 °C unless otherwise noted . . . . . . . . . . . . 7

Table 5. Electrical characteristics @ Vdd=3.3 V, T=25 °C unless otherwise noted . . . . . . . . . . . . . 9

Table 6. SPI Slave Timing Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 7. I2C slave timing values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 8. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Table 9. Serial interface pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 10. Serial interface pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 11. Transfer when master is writing one byte to slave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 12. Transfer when master is writing multiple bytes to slave . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 13. Transfer when master is receiving (reading) one byte of data from slave . . . . . . . . . . . . . 18

Table 14. Transfer when master is receiving (reading) multiple bytes of data from slave . . . . . . . . . 18

Table 15. Registers address map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 16. Register (0Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 17. Register description (0Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 18. Register (16h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 19. Register description (16h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 20. Register (17h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 21. Register description (17h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 22. Register (18h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 23. Register description (18h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 24. Register (19h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 25. Register description (19h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 26. Register (1Ah). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 27. Register description (1Ah) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 28. Register (1Bh). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 29. Register description (1Bh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 30. Register (20h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 31. Register description (20h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 32. Register (21h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 33. Register description (21h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 34. Register (22h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 35. Register description (22h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 36. Register (27h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 37. Register description (27h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 38. Register (28h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 39. Register description (28h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 40. Register (29h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 41. Register description (29h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 42. Register (2Ah). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 43. Register description (2Ah) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 44. Register (2Bh). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 45. Register description (2Bh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 46. Register (2Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 47. Register description (2Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 48. Register (2Dh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6/48

LIS3LV02DL List of tables

Table 49. Register description (2Dh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 50. Register (30h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 51. Register description (30h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 52. Register (31h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 53. Register description (31h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 54. Register (34h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 55. Register description (34h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 56. Register (35h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 57. Register description (35h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 58. Register (36h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 59. Register description (36h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 60. Register (38h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 61. Register description (38h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 62. Register (39h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 63. Register description (39h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 64. Register (3Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 65. Register description (3Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 66. Register (3Dh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 67. Register description (3Dh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 68. Register (3Eh). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 69. Register description (3Eh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 70. Register (3Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 71. Register description (3Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 72. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

7/48

Block diagram and pin description LIS3LV02DL

1 Block diagram and pin description

1.1 Block diagram

Figure 1. Block diagram

X+

Y+

Z+

MUX

Z-

Y-

X-

REFERENCESELF TEST

CHARGE

AMPLIFIER

1.2 LGA-16 pin description

Figure 2. Pin connection

MUX

TRIMMING

CIRCUITS

Σ∆

Reconstruction

CLOCK

SCL/SPC

Filter

VDD_IO

SDA/SDI/SDO

Regs

Array

CONTROL LOGIC

INTERRUPT GEN.

SDO

RDY/INT

SPI

SCL/SPC

I2C

SDA/SDO/SDI

SDO

RDY/INT

DIRECTION OF THE DETECTABLE ACCELERATIONS

Table 2. Pin description

Pin# Name Function

1 RDY/INT Data ready/inertial wake-up interrupt

2 SDO SPI Serial Data Output

8/48

LIS3LV02DL

(TOP VIEW)

RES

GND

VDD

RES

VDD

GND

RES

LIS3LV02DL Block diagram and pin description

Table 2. Pin description

Pin# Name Function

SDA/

SDI/

SDO

C Serial Data (SDA)

I SPI Serial Data Input (SDI) 3-wire Interface Serial Data Output (SDO)

4 Vdd_IO Power supply for I/O pads

C Serial Clock (SCL)

5SCL/SPC

6CS

I SPI Serial Port Clock (SPC)

SPI enable

C/SPI mode selection (1: I2C mode; 0: SPI enabled)

7 NC Internally not connected

8CK

Optional external clock, if not used either leave unconnected or connect to GND

9 GND 0 V supply

10 Reserved Either leave unconnected or connect to Vdd_IO

11 Vdd Power supply

12 Reserved Connect to Vdd

13 Vdd Power supply

14 GND 0 V supply

15 Reserved Either leave unconnected or connect to GND

16 GND 0 V supply

9/48

Mechanical and electrical specifications LIS3LV02DL

2 Mechanical and electrical specifications

2.1 Mechanical characteristics

Table 3. Mechanical characteristics @ Vdd=3.3 V, T=25 °C unless otherwise noted

Symbol Parameter Test conditions Min.

Dres Device resolution

So Sensitivity

TCSo

Off

LTO f f

TCOff

Measurement range

Sensitivity change vs temperature

Zero-g level offset

accuracy

Zero-g Level offset long term

accuracy

Zero-g Level Change Vs Temperature

(4),(5)

(6)

(3)

FS bit set to 0 ±1.7 ±2.0

FS bit set to 1 ±5.3 ±6.0

Full-scale = ±2 g ODR1=40 Hz

Full-scale = ±2 g ODR2=160 Hz

Full-scale = ±2 g ODR3=640 Hz

Full-scale = ±2 g ODR4=2560 Hz

Full-scale = ±2 g 12 bit representation

Full-scale = ±6 g 12 bit representation

Full-scale = ±2 g 12 bit representation

Full-scale = ±2 g X, Y axis

Full-scale = ±2 g Z axis

Full-scale = ±6 g X, Y axis

Full-scale = ±6 g Z axis

Full-scale = ±2 g X, Y axis

Full-scale = ±2 g Z axis

Full-scale = ±6 g X, Y axis

Full-scale = ±6 g Z axis

Max Delta from 25°C 0.2 mg/

920 1024 1126

306 340 374

-70 70

-90 90

-100 100

-4.5 4.5

-6 6

-1.8 1.8

-2.2 2.2

(2)

Typ .

1.0

2.0

3.9

15.6

0.025 %/

Max. Unit

(1)

LSb/g

°C

%FS

°C

10/48

LIS3LV02DL Mechanical and electrical specifications

Table 3. Mechanical characteristics @ Vdd=3.3 V, T=25 °C unless otherwise noted

(1)

(continued)

Symbol Parameter Test conditions Min.

Best fit straight line X, Y axis Full-scale = ±2 g ODR=40 Hz

NL Non Linearity

Best fit straight line Z axis Full-scale = ±2 g ODR=40 Hz

CrAx Cross axis -3.5 3.5 %

Full-scale= ±2g X axis

Full-scale= ±2 g Y axis

Full-scale= ±2 g Z axis

Self test output change

(7),(8)

Full-scale= ±6 g X axis

250 550 900 LSb

-100 -350 -600 LSb

80 180 300 LSb

Typ .

±2

±3

(2)

Max. Unit

%FS

To p

System Bandwidth

(9)

Operating Temperature Range

Full-scale= ±6 g Y axis

Full-scale= ±6 g Z axis

80 180 300 LSb

-30 -120 -200 LSb

ODRx/4 Hz

-40 +85 °C

Wh Product Weight 72 mgram

1. The product is factory calibrated at 3.3 V. The device can be used from 2.16 V to 3.6 V

2. Typical specifications are not guaranteed

3. Verified by wafer level test and specification of initial offset and sensitivity

4. Zero-g level offset value after MSL3 preconditioning

5. Offset can be eliminated by enabling the built-in high pass filter (HPF)

6. Results of accelerated reliability tests

7. Self Test output changes with the power supply. “Self test output change” is defined as OUTPUT[LSb]

ctrl_reg1=1)

8. Output data reach 99% of final value after 5/ODR when enabling Self-Test mode due to device filtering

9. ODRx is output data rate. Refer to Table 5 for specifications

- OUTPUT[LSb]

(Self-test bit on ctrl_reg1=0)

. 1LSb=1g/1024 at 12bit representation, 2g Full-Scale

(Self-test bit on

11/48

Mechanical and electrical specifications LIS3LV02DL

Table 4. Mechanical characteristics @ Vdd=2.5 V, T=25 °C unless otherwise noted

(1)

Symbol Parameter Test conditions Min.

Measurement range

(3)

FS bit set to 0 ±1.7 ±2.0

FS bit set to 1 ±5.3 ±6.0

Full-scale = ±2g ODR1=40Hz

Full-scale = ±2g ODR2=160Hz

Dres Device resolution

Full-scale = ±2g ODR3=640Hz

Full-scale = ±2g ODR4=2560Hz

Full-scale = ±2g 12 bit representation

920 1024 1126

So Sensitivity

TCSo

Off

LTO f f

TCOff

Sensitivity change vs temperature

Zero-g level offset

accuracy

(4),(5)

Zero-g level offset long term

accuracy

(6)

Zero-g level change vs temperature

Full-scale = ±6g 12 bit representation

Full-scale = ±2g 12 bit representation

Full-scale = ±2g X, Y axis

Full-scale = ±2g Z axis

Full-scale = ±6g X, Y axis

Full-scale = ±6g Z axis

Full-scale = ±2g X, Y axis

Full-scale = ±2g Z axis

Full-scale = ±6g X, Y axis

Full-scale = ±6g Z axis

Max Delta from 25°C 0.2 mg/

306 340 374

-90 90

-110 110

-120 120

-5.5 5.5

-7 7

-2.8 2.8

-3.2 3.2

(2)

Typ .

Max. Unit

1.0

2.0

3.9

15.6

LSb/g

0.025 %/

°C

%FS

°C

12/48

LIS3LV02DL Mechanical and electrical specifications

Table 4. Mechanical characteristics @ Vdd=2.5 V, T=25 °C unless otherwise noted

(1)

(continued)

Symbol Parameter Test conditions Min.

Best fit straight line X, Y axis Full-scale = ±2g ODR=40Hz

NL Non linearity

Best fit straight line Z axis Full-scale = ±2g ODR=40Hz

CrAx Cross axis -3.5 3.5 %

Full-scale= ±2g X axis

Full-scale= ±2g Y axis

Full-scale= ±2g Z axis

Self test output change

(7),(8)

Full-scale= ±6g X axis

100 240 400 LSb

-30 -150 -350 LSb

30 80 130 LSb

Typ .

±2

±3

(2)

Max. Unit

%FS

System bandwidth

Full-scale= ±6g Y axis

Full-scale= ±6g Z axis

(9)

30 80 130 LSb

-10 -50 -120 LSb

ODRx/4 Hz

Top Operating temperature range -40 +85 °C

Wh Product weight 72 mgram

1. The product is factory calibrated at 3.3 V. The device can be used from 2.16 V to 3.6 V

2. Typical specifications are not guaranteed

3. Verified by wafer level test and specification of initial offset and sensitivity

4. Zero-g level offset value after MSL3 preconditioning

5. Offset can be eliminated by enabling the built-in high pass filter (HPF)

6. Results of accelerated reliability tests

7. Self Test output changes with the power supply. “Self test output change” is defined as OUTPUT[LSb]

ctrl_reg1=1)

8. Output data reach 99% of final value after 5/ODR when enabling Self-Test mode due to device filtering

9. ODRx is output data rate. Refer to Table 5 for specifications

- OUTPUT[LSb]

(Self-test bit on ctrl_reg1=0)

. 1LSb=1g/1024 at 12bit representation, 2g Full-Scale

(Self-test bit on

13/48

Mechanical and electrical specifications LIS3LV02DL

2.2 Electrical characteristics

Table 5. Electrical characteristics @ Vdd=3.3 V, T=25 °C unless otherwise noted

Symbol Parameter Test conditions Min.

Typ .

(2)

(1)

Max. Unit

Vdd Supply voltage 2.16 3.3 3.6 V

Vdd_IO I/O pads supply voltage 1.71 Vdd V

Vdd = 3.3 V 0.65 0.80

Idd Supply current

Vdd = 2.5 V 0.60 0.75

IddPdn

VIH

VIL

VOH High level output voltage

VOL Low level output voltage

Current consumption in Power-down mode

Digital High level Input voltage

Digital Low level Input voltage

110µA

0.8*Vdd _IO

0.2*Vdd _IO

0.9*Vdd _IO

0.1*Vdd _IO

ODR1 Output Data Rate 1 Dec factor = 512 40

ODR2 Output Data Rate 2 Dec factor = 128 160

ODR3 Output Data Rate 3 Dec factor = 32 640

ODR4 Output Data Rate 4 Dec factor = 8 2560

To n

System bandwidth

Turn-on time

(4)

(3)

ODRx/4 Hz

5/ODRx s

Top Operating temperature range -40 +85 °C

1. The product is factory calibrated at 3.3 V. The device can be used from 2.16 V to 3.6 V

2. Typical specifications are not guaranteed

3. Digital filter cut-off frequency

4. Time to obtain valid data after exiting Power-Down mode

14/48

LIS3LV02DL Mechanical and electrical specifications

2.3 Communication interface characteristics

2.3.1 SPI - serial peripheral interface

Subject to general operating conditions for Vdd and Top.

Table 6. SPI Slave Timing Values

(1)

Val ue

Symbol Parameter

Min Max

tc(SPC) SPI clock cycle 125 ns

fc(SPC) SPI clock frequency 8 MHz

tsu(CS) CS setup time 5

th(CS) CS hold time 10

tsu(SI) SDI input setup time 5

Unit

th(SI) SDI input hold time 15

tv(SO) SDO valid output time 55

th(SO) SDO output hold time 7

tdis(SO) SDO output disable time 50

1. Values are guaranteed at 8 MHz clock frequency for SPI with both 4 and 3 wires, based on characterization results, not tested in production

(2)

h(SI)

v(SO)

(3)

c(SPC)

h(SO)

h(CS)

LSB IN

LSB OUT

(3)

dis(SO)

(3)

Figure 3. SPI slave timing diagram

(3)

su(CS)

SPC

(3)

su(SI)

SDI

SDO

(3)

MSB IN

MSB OUT

2. Measurement points are done at 0.2·Vdd_IO and 0.8·Vdd_IO, for both input and output port

3. When no communication is on-going, data on CS, SPC, SDI and SDO are driven by internal pull-up resistors

15/48

Mechanical and electrical specifications LIS3LV02DL

2.3.2 I2C - Inter IC control interface

Subject to general operating conditions for Vdd and Top.

Table 7. I2C slave timing values

Symbol Parameter

I2C standard mode

(1)

I2C fast mode

Min Max Min Max

(1)

Unit

(SCL)

w(SCLL)

w(SCLH)

su(SDA)

h(SDA)

r(SDA) tr(SCL)

f(SDA) tf(SCL)

h(ST)

su(SR)

su(SP)

w(SP:SR)

SCL clock frequency 0 100 0 400 KHz

SCL clock low time 4.7 1.3

SCL clock high time 4.0 0.6

SDA setup time 250 100 ns

SDA data hold time

(2)

3.45

SDA and SCL rise time 1000

SDA and SCL fall time 300

(2)

20 + 0.1C

0.9 µs

(3)

300

START condition hold time 4 0.6

Repeated START condition setup time

4.7 0.6

STOP condition setup time 4 0.6

Bus free time between STOP and START condition

4.7 1.3

1. Data based on standard I2C protocol requirement, not tested in production

2. A device must internally provide an hold time of at least 300ns for the SDA signal (referred to VIHmin of the SCL signal) to bridge the undefined region of the falling edge of SCL

3. Cb = total capacitance of one bus line, in pF

Figure 4. I

C slave timing diagram

(4)

µs

START

SDA

su(SDA)

r(SCL)tf(SCL)

SCL

f(SDA)

h(ST)

w(SCLL)

r(SDA)

w(SCLH)

4.Measurement points are done at 0.2·Vdd_IO and 0.8·Vdd_IO, for both port

16/48

h(SDA)

su(SR)

su(SP)

w(SP:SR)

REPEATED

START

STOP

LIS3LV02DL Mechanical and electrical specifications

2.4 Absolute maximum ratings

Stresses above those listed as “absolute maximum ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device under these conditions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

Table 8. Absolute maximum ratings

Symbol Ratings Maximum Value Unit

Vdd Supply voltage -0.3 to 6 V

Vdd_IO I/O pins Supply voltage -0.3 to Vdd +0.1 V

Vin

POW

UNP

STG

ESD Electrostatic discharge protection

Input voltage on any control pin (CS, SCL/SPC, SDA/SDI/SDO, CK)

Acceleration (Any axis, Powered, Vdd=3.3 V)

Acceleration (any axis, unpowered)

Operating temperature range -40 to +85 °C

Storage temperature range -40 to +125 °C

-0.3 to Vdd_IO +0.3 V

3000g for 0.5 ms

10000g for 0.1 ms

3000g for 0.5 ms

10000g for 0.1 ms

4.0 (HBM) kV

200 (MM) V

1.5 (CDM) kV

Note: Supply voltage on any pin should never exceed 6.0 V.

This is a Mechanical Shock sensitive device, improper handling can cause permanent damages to the part

This is an ESD sensitive device, improper handling can cause permanent damages to the part

17/48

Mechanical and electrical specifications LIS3LV02DL

2.5 Terminology

2.5.1 Sensitivity

Sensitivity describes the gain of the sensor and can be determined e.g. by applying 1g acceleration to it. As the sensor can measure DC accelerations this can be done easily by pointing the axis of interest towards the center of the Earth, noting the output value, rotating the sensor by 180 degrees (point to the sky) and noting the output value again. By doing so, ±1g acceleration is applied to the sensor. Subtracting the larger output value from the smaller one and dividing the result by 2 leads to the actual sensitivity of the sensor. This value changes very little over temperature and also very little over time. The Sensitivity Tolerance describes the range of Sensitivities of a large population of sensors.

2.5.2 Zero-g level

Zero-g level Offset (Off) describes the deviation of an actual output signal from the ideal output signal if there is no acceleration present. A sensor in a steady state on a horizontal surface will measure 0g in X axis and 0g in Y axis whereas the Z axis will measure 1g. The output is ideally in the middle of the dynamic range of the sensor (content of OUT registers 00h, 00h with 16 bit representation, data expressed as 2’s complement number). A deviation from ideal value in this case is called Zero-g offset. Offset is to some extent a result of stress to a precise MEMS sensor and therefore the offset can slightly change after mounting the sensor onto a printed circuit board or exposing it to extensive mechanical stress. Offset changes little over temperature, see “Zero-g level change vs. temperature”. The Zero-g level of an individual sensor is stable over lifetime. The Zero-g level tolerance describes the range of Zero-g levels of a population of sensors.

2.5.3 Self test

Self Test allows to test the mechanical and electric part of the sensor, allowing the seismic mass to be moved by means of an electrostatic test-force. The Self Test function is off when the self-test bit of CTRL_REG1 (control register 1) is programmed to ‘0‘. When the self-test bit of CTRL_REG1 is programmed to ‘1‘ an actuation force is applied to the sensor, simulating a definite input acceleration. In this case the sensor outputs will exhibit a change in their DC levels which is related to the selected full scale and depending on the Supply Voltage through the device sensitivity. When Self Test is activated, the device output level is given by the algebraic sum of the signals produced by the acceleration acting on the sensor and by the electrostatic test-force. If the output signals change within the amplitude specified inside Ta bl e 3 or 4 then the sensor is working properly and the parameters of the interface chip are within the defined specification.

18/48

LIS3LV02DL Functionality

3 Functionality

The LIS3LV02DL is a high performance, low-power, digital output 3-axis linear accelerometer packaged in an LGA package. The complete device includes a sensing element and an IC interface able to take the information from the sensing element and to provide a signal to the external world through an I

3.1 Sensing element

A proprietary process is used to create a surface micro-machined accelerometer. The technology allows to carry out suspended silicon structures which are attached to the substrate in a few points called anchors and are free to move in the direction of the sensed acceleration. To be compatible with the traditional packaging techniques a cap is placed on top of the sensing element to avoid blocking the moving parts during the moulding phase of the plastic encapsulation.

When an acceleration is applied to the sensor the proof mass displaces from its nominal position, causing an imbalance in the capacitive half-bridge. This imbalance is measured using charge integration in response to a voltage pulse applied to the sense capacitor.

At steady state the nominal value of the capacitors are few pF and when an acceleration is applied the maximum variation of the capacitive load is up to 100fF.

C/SPI serial interface.

3.2 IC interface

The complete measurement chain is composed by a low-noise capacitive amplifier which converts into an analog voltage the capacitive unbalancing of the MEMS sensor and by three Σ∆ analog-to-digital converters, one for each axis, that translate the produced signal into a digital bitstream.

The Σ∆ converters are coupled with dedicated reconstruction filters which remove the high frequency components of the quantization noise and provide low rate and high resolution digital words.

The charge amplifier and the Σ∆ converters are operated respectively at 61.5 kHz and

20.5 kHz.

The data rate at the output of the reconstruction depends on the user selected Decimation Factor (DF) and spans from 40 Hz to 2560 Hz.

The acceleration data may be accessed through an I device particularly suitable for direct interfacing with a microcontroller.

The LIS3LV02DL features a Data-Ready signal (RDY) which indicates when a new set of measured acceleration data is available thus simplifying data synchronization in digital system employing the device itself.

The LIS3LV02DL may also be configured to generate an inertial Wake-Up, Direction Detection and Free-Fall interrupt signal accordingly to a programmed acceleration event along the enabled axes.

C/SPI interface thus making the

19/48

Functionality LIS3LV02DL

3.3 Factory calibration

The IC interface is factory calibrated for sensitivity (So) and Zero-g level (Off).

The trimming values are stored inside the device by a non volatile structure. Any time the device is turned on, the trimming parameters are downloaded into the registers to be employed during the normal operation. This allows the user to employ the device without further calibration.

20/48

LIS3LV02DL Application hints

4 Application hints

Figure 5. LIS3LV02DL electrical connection

Vdd_IO

SCL/SPC

GND

Digital signal from/to signal controller.Signal’s levels are defined by proper selection of Vdd_IO

LIS3LV02DL

(TOP VIEW)

SDO

SDA/SDI/SDO

RDY/INT

100nF

DIRECTION OF THE DETECTABLE ACCELERATIONS

Vdd

10uF

The device core is supplied through Vdd line while the I/O pads are supplied through Vdd_IO line. Power supply decoupling capacitors (100 nF ceramic, 10 µF Al) should be placed as near as possible to the pin 13 of the device (common design practice).

All the voltage and ground supplies must be present at the same time to have proper behavior of the IC (refer to Figure 7). It is possible to remove Vdd maintaining Vdd_IO without blocking the communication busses. In this condition the measurement chain is powered off.

The functionality of the device and the measured acceleration data is selectable and accessible through the I

C/SPI interface.When using the I2C, CS must be tied high while SDO must be left floating. Refer to dedicated application note for further information on device usage.

The functions, the trasholds and the timing of the interrupt pin (INT) can be completely programmed by the user through the I

C/SPI interface.

4.1 Soldering Information

The LGA-16 package is compliant with the ECOPACK®, RoHS and “Green” standard. It is qualified for soldering heat resistance according to JEDEC J-STD-020C.

Leave “Pin 1 Indicator” unconnected during soldering.

Land pattern and soldering recommendations are available at www.st.com/mems

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Digital interfaces LIS3LV02DL

5 Digital interfaces

The registers embedded inside the LIS3LV02DL may be accessed through both the I2C and SPI serial interfaces. The latter may be SW configured to operate either in 3-wire or 4-wire interface mode.

The serial interfaces are mapped onto the same pads. To select/exploit the I line must be tied high (i.e connected to Vdd_IO).

Table 9. Serial interface pin description

Pin name Pin description

C interface, CS

SCL/SPC

SDA/SDI/SDO

SDO SPI Serial Data Output (SDO)

SPI enable

C/SPI mode selection (1: I2C mode; 0: SPI enabled)

C Serial Clock (SCL)

I SPI Serial Port Clock (SPC)

C Serial Data (SDA) SPI Serial Data Input (SDI) 3-wire Interface Serial Data Output (SDO)

5.1 I2C serial interface

The LIS3LV02DL I2C is a bus slave. The I2C is employed to write the data into the registers whose content can also be read back.

The relevant I

Table 10. Serial interface pin description

Term Description

Transmitter The device which sends data to the bus

Receiver The device which receives data from the bus

C terminology is given in the table below.

Master

Slave The device addressed by the master

The device which initiates a transfer, generates clock signals and terminates a transfer

There are two signals associated with the I2C bus: the Serial Clock Line (SCL) and the Serial DAta line (SDA). The latter is a bidirectional line used for sending and receiving the data to/from the interface. Both the lines are connected to Vdd_IO through a pull-up resistor embedded inside the LIS3LV02DL. When the bus is free both the lines are high.

The I

C interface is compliant with Fast Mode (400 kHz) I2C standards as well as the

Normal Mode.

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LIS3LV02DL Digital interfaces

5.1.1 I2C operation

The transaction on the bus is started through a START (ST) signal. A START condition is defined as a HIGH to LOW transition on the data line while the SCL line is held HIGH. After this has been transmitted by the Master, the bus is considered busy. The next byte of data transmitted after the start condition contains the address of the slave in the first 7 bits and the eighth bit tells whether the Master is receiving data from the slave or transmitting data to the slave. When an address is sent, each device in the system compares the first seven bits after a start condition with its address. If they match, the device considers itself addressed by the Master. The Slave ADdress (SAD) associated to the LIS3LV02DL is 0011101b.

Data transfer with acknowledge is mandatory. The transmitter must release the SDA line during the acknowledge pulse. The receiver must then pull the data line LOW so that it remains stable low during the HIGH period of the acknowledge clock pulse. A receiver which has been addressed is obliged to generate an acknowledge after each byte of data received.

The I

C embedded inside the LIS3LV02DL behaves like a slave device and the following protocol must be adhered to. After the start condition (ST) a salve address is sent, once a slave acknowledge (SAK) has been returned, a 8-bit sub-address will be transmitted: the 7 LSb represent the actual register address while the MSB enables address auto increment. If the MSb of the SUB field is 1, the SUB (register address) will be automatically incremented to allow multiple data read/write.

The slave address is completed with a Read/Write bit. If the bit was ‘1’ (Read), a repeated START (SR) condition will have to be issued after the two sub-address bytes; if the bit is ‘0’ (Write) the Master will transmit to the slave with direction unchanged.

Table 11. Transfer when master is writing one byte to slave

Master ST SAD + W SUB DATA SP

Slave SAK SAK SAK

Table 12. Transfer when master is writing multiple bytes to slave

Master ST SAD + W SUB DATA DATA SP

Slave SAK SAK SAK SAK

Table 13. Transfer when master is receiving (reading) one byte of data from slave

Master ST SAD + W SUB SR SAD + R NMAK SP

Slave SAK SAK SAK DATA

Table 14. Transfer when master is receiving (reading) multiple bytes of data from slave

Master ST SAD+W SUB SR SAD+R MAK MAK NMAK SP

Slave SAK SAK SAK DATA DATA DATA

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Digital interfaces LIS3LV02DL

Data are transmitted in byte format (DATA). Each data transfer contains 8 bits. The number of bytes transferred per transfer is unlimited. DATA is transferred with the Most Significant bit (MSb) first. If a receiver can’t receive another complete byte of data until it has performed some other function, it can hold the clock line, SCL LOW to force the transmitter into a wait state. Data transfer only continues when the receiver is ready for another byte and releases the data line. If a slave receiver doesn’t acknowledge the slave address (i.e. it is not able to receive because it is performing some real time function) the data line must be left HIGH by the slave. The Master can then abort the transfer. A LOW to HIGH transition on the SDA line while the SCL line is HIGH is defined as a STOP condition. Each data transfer must be terminated by the generation of a STOP (SP) condition.

In order to read multiple bytes, it is necessary to assert the most significant bit of the subaddress field. In other words, SUB(7) must be equal to ‘1’ while SUB(6-0) represents the address of first register to read.

In the presented communication format MAK is Master Acknowledge and NMAK is No Master Acknowledge.

5.2 SPI bus interface

The LIS3LV02DL SPI is a bus slave. The SPI allows to write and read the registers of the device.

The serial interface interacts with the outside world with 4 wires: CS, SPC, SDI and SDO.

Figure 6. Read and write protocol

SPC

SDI

DI7DI6DI5DI4DI3DI2DI1DI0

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

SDO

AD5 AD4 AD3 AD2 AD1 AD0

CS is the Serial Port Enable and it is controlled by the SPI master. It goes low at the start of the transmission and goes back high at the end.

SPC is the Serial Port Clock and it is controlled by the SPI master. It is stopped high when CS is high (no transmission).

SDI and SDO are respectively the Serial Port Data Input and Output. Those lines are driven

at the falling edge of SPC and should be captured at the rising edge of SPC.

Both the Read Register and Write Register commands are completed in 16 clock pulses or in multiple of 8 in case of multiple byte read/write. Bit duration is the time between two falling edges of SPC. The first bit (bit 0) starts at the first falling edge of SPC after the falling edge of CS while the last bit (bit 15, bit 23, ...) starts at the last falling edge of SPC just before the rising edge of CS.

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LIS3LV02DL Digital interfaces

bit 0: RW bit. When 0, the data DI(7:0) is written into the device. When 1, the data DO(7:0) from the device is read. In latter case, the chip will drive SDO at the start of bit 8.

bit 1: MS When 1, the address will be auto incremented in multiple read/write commands.

bit 2-7: address AD(5:0). This is the address field of the indexed register.

bit 8-15: data DI(7:0) (write mode). This is the data that will be written into the device (MSb

first).

bit 8-15: data DO(7:0) (read mode). This is the data that will be read from the device (MSb first).

In multiple read/write commands further blocks of 8 clock periods will be added. When MS bit is 0 the address used to read/write data remains the same for every block. When MS is ‘1’ the address used to read/write data is incremented at every block.

The function and the behavior of SDI and SDO remain unchanged.

5.2.1 SPI read

Figure 7. SPI read protocol

bit. When 0, the address will remain unchanged in multiple read/write commands.

bit

SPC

SDI

AD5 AD4 AD3 AD2 AD1 AD0

SDO

DO7 DO6DO5 DO4DO3 DO2 DO1DO0

The SPI Read command is performed with 16 clock pulses. Multiple byte read command is performed adding blocks of 8 clock pulses at the previous one.

bit 0: READ bit. The value is 1.

bit 1: MS

bit. When 0 do not increment address, when 1 increment address in multiple

reading.

bit 2-7: address AD(5:0). This is the address field of the indexed register.

bit 8-15: data DO(7:0) (read mode). This is the data that will be read from the device (MSb

first).

bit 16-... : data DO(...-8). Further data in multiple byte reading.

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Digital interfaces LIS3LV02DL

Figure 8. Multiple bytes SPI read protocol (2 bytes example)

SPC

SDI

AD5 AD4 AD3 AD2 AD1 AD0

SDO

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

DO15 DO14 DO13 DO12 DO11 DO10 DO9 DO8

5.2.2 SPI write

Figure 9. SPI write protocol

SPC

SDI

AD5 AD4 AD3 AD2 AD1 AD0MS

DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0

The SPI Write command is performed with 16 clock pulses. Multiple byte write command is performed adding blocks of 8 clock pulses at the previous one.

bit 0: WRITE bit. The value is 0.

bit 1: MS

bit. When 0 do not increment address, when 1 increment address in multiple

writing.

bit 2 -7: address AD(5:0). This is the address field of the indexed register.

bit 8-15: data DI(7:0) (write mode). This is the data that will be written inside the device

(MSb first).

bit 16-... : data DI(...-8). Further data in multiple byte writing.

Figure 10. Multiple bytes SPI write protocol (2 bytes example)

SPC

SDI

AD5 AD4 AD3 AD2 AD1 AD0

DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0 DI15 DI14 DI13 DI12 DI11 DI10 DI9 DI8

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LIS3LV02DL Digital interfaces

5.2.3 SPI Read in 3-wires mode

3-wires mode is entered by setting to ‘1’ bit SIM (SPI Serial Interface Mode selection) in CTRL_REG2.

Figure 11. SPI read protocol in 3-wires mode

SPC

SDI/O

AD5 AD4 AD3 AD2 AD1 AD0

The SPI Read command is performed with 16 clock pulses:

bit 0: READ bit. The value is 1.

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

bit 1: MS

bit. When 0 do not increment address, when 1 increment address in multiple

reading.

bit 2-7: address AD(5:0). This is the address field of the indexed register.

bit 8-15: data DO(7:0) (read mode). This is the data that will be read from the device (MSb

first).

Multiple read command is also available in 3-wires mode.

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6 Register mapping

The table given below provides a listing of the 8 bit registers embedded in the device and the related addresses.

Table 15. Registers address map

Binary Hex

rw 0000000 - 0001110 00 - 0E Reserved

WHO_AM_I r 0001111 0F 00111010 Dummy register

rw 0010000 - 0010101 10-15 Reserved

OFFSET_X rw 0010110 16 Calibration Loaded at boot

OFFSET_Y rw 0010111 17 Calibration Loaded at boot

OFFSET_Z rw 0011000 18 Calibration Loaded at boot

GAIN_X rw 0011001 19 Calibration Loaded at boot

GAIN_Y rw 0011010 1A Calibration Loaded at boot

GAIN_Z rw 0011011 1B Calibration Loaded at boot

0011100 -0011111 1C-1F Reserved

Default Comment

CTRL_REG1 rw 0100000 20 00000111

CTRL_REG2 rw 0100001 21 00000000

CTRL_REG3 rw 0100010 22 00001000

HP_FILTER RESET r 0100011 23 dummy Dummy register

0100100-0100110 24-26 Not Used

STATUS_REG rw 0100111 27 00000000

OUTX_L r 0101000 28 output

OUTX_H r 0101001 29 output

OUTY_L r 0101010 2A output

OUTY_H r 0101011 2B output

OUTZ_L r 0101100 2C output

OUTZ_H r 0101101 2D output

r 0101110 2E Reserved

0101111 2F Not Used

FF_WU_CFG rw 0110000 30 00000000

FF_WU_SRC rw 0110001 31 00000000

FF_WU_ACK r 0110010 32 dummy Dummy register

0110011 33 Not Used

FF_WU_THS_L rw 0110100 34 00000000

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LIS3LV02DL Register mapping

Table 15. Registers address map (continued)

Binary Hex

FF_WU_THS_H rw 0110101 35 00000000

FF_WU_DURATION rw 0110110 36 00000000

0110111 37 Not Used

DD_CFG rw 0111000 38 00000000

DD_SRC rw 0111001 39 00000000

DD_ACK r 0111010 3A dummy Dummy register

0111011 3B Not Used

DD_THSI_L rw 0111100 3C 00000000

DD_THSI_H rw 0111101 3D 00000000

DD_THSE_L rw 0111110 3E 00000000

DD_THSE_H rw 0111111 3F 00000000

1000000-1111111 40-7F Reserved

Default Comment

Registers marked as Reserved must not be changed. The writing to those registers may cause permanent damages to the device.

The content of the registers that are loaded at boot should not be changed. They contain the factory calibration values. Their content is automatically restored when the device is powered-up.

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7 Register description

The device contains a set of registers which are used to control its behavior and to retrieve acceleration data. The registers 7.2 to 7.7 contain the factory calibration values, it is not necessary to change their value for normal device operation.

7.1 WHO_AM_I (0Fh)

Table 16. Register (0Fh)

W7 W6 W5 W4 W3 W2 W1 W0

Table 17. Register description (0Fh)

W7, W0 LIS3LV02DL Physical Address equal to 3Ah

Addressing this register the physical address of the device is returned. For LIS3LV02DL the physical address assigned in factory is 3Ah.

7.2 OFFSET_X (16h)

Table 18. Register (16h)

OX7OX6OX5OX4OX3OX2OX1OX0

Table 19. Register description (16h)

OX7, OX0 Digital Offset Trimming for X-Axis

7.3 OFFSET_Y (17h)

Table 20. Register (17h)

OY7 OY6 OY5 OY4 OY3 OY2 OY1 OY0

Table 21. Register description (17h)

OY7, OY0 Digital Offset Trimming for Y-Axis

7.4 OFFSET_Z (18h)

Table 22. Register (18h)

OZ7 OZ6 OZ5 OZ4 OZ3 OZ2 OZ1 OZ0

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LIS3LV02DL Register description

Table 23. Register description (18h)

OZ7, OZ0 Digital Offset Trimming for Z-Axis

7.5 GAIN_X (19h)

Table 24. Register (19h)

GX7GX6GX5GX4GX3GX2GX1GX0

Table 25. Register description (19h)

GX7, GX0 Digital Gain Trimming for X-Axis

7.6 GAIN_Y (1Ah)

Table 26. Register (1Ah)

GY7GY6GY5GY4GY3GY2GY1GY0

Table 27. Register description (1Ah)

GY7, GY0 Digital Gain Trimming for Y-Axis

7.7 GAIN_Z (1Bh)

Table 28. Register (1Bh)

GZ7 GZ6 GZ5 GZ4 GZ3 GZ2 GZ1 GZ0

Table 29. Register description (1Bh)

GZ7, GZ0 Digital Gain Trimming for Z-Axis

7.8 CTRL_REG1 (20h)

Table 30. Register (20h)

PD1 PD0 DF1 DF0 ST Zen Yen Xen

Table 31. Register description (20h)

PD1, PD0

Power Down Control (00: power-down mode; 01, 10, 11: device on)

DF1, DF0

Decimation Factor Control (00: decimate by 512; 01: decimate by 128; 10: decimate by 32; 11: decimate by 8)

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Table 31. Register description (continued) (20h)

Zen

Ye n

Xen

Self Test Enable (0: normal mode; 1: self-test active)

Z-axis enable (0: axis off; 1: axis on)

Y-axis enable (0: axis off; 1: axis on)

X-axis enable (0: axis off; 1: axis on)

PD1, PD0 bit allows to turn the device out of power-down mode. The device is in powerdown mode when PD1, PD0= “00” (default value after boot). The device is in normal mode when either PD1 or PD0 is set to 1.

DF1, DF0 bit allows to select the data rate at which acceleration samples are produced. The default value is “00” which corresponds to a data-rate of 40 Hz. By changing the content of DF1, DF0 to “01”, “10” and “11” the selected data-rate will be set respectively equal to 160 Hz, 640 Hz and to 2560 Hz.

ST bit is used to activate the self test function. When the bit is set to one, an output change will occur to the device outputs (refer to table 2 and 3 for specification) thus allowing to check the functionality of the whole measurement chain.

Zen bit enables the Z-axis measurement channel when set to 1. The default value is 1.

Yen bit enables the Y-axis measurement channel when set to 1. The default value is 1.

Xen bit enables the X-axis measurement channel when set to 1. The default value is 1.

7.9 CTRL_REG2 (21h)

Table 32. Register (21h)

FS BDU BLE BOOT IEN DRDY SIM DAS

Table 33. Register description (21h)

BDU

BLE

BOOT Reboot memory content

IEN

Full Scale selection (0: ±2g; 1: ±6g)

Block Data Update (0: continuous update; 1: output registers not updated between MSB and LSB

reading)

Big/Little Endian selection (0: little endian; 1: big endian)

Interrupt ENable (0: data ready on RDY pad; 1: interrupt events on RDY pad)

DRDY Enable Data-Ready generation

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LIS3LV02DL Register description

Table 33. Register description (continued) (21h)

SIM

DAS

SPI Serial Interface Mode selection (0: 4-wire interface; 1: 3-wire interface)

Data Alignment Selection (0: 12 bit right justified; 1: 16 bit left justified)

FS bit is used to select Full Scale value. After the device power-up the default full scale value is +/-2g. In order to obtain a +/-6g full scale it is necessary to set FS bit to ‘1’.

BDU bit is used to inhibit output registers update between the reading of upper and lower register parts. In default mode (BDU = ‘0’) the lower and upper register parts are updated continuously. If it is not sure to read faster than output data rate, it is recommended to set BDU bit to ‘1’. In this way, after the reading of the lower (upper) register part, the content of that output registers is not updated until the upper (lower) part is read too. This feature avoids reading LSB and MSB related to different samples.

BLE bit is used to select Big Endian or Little Endian representation for output registers. In Big Endian’s one MSB acceleration value is located at addresses 28h (X-axis), 2Ah (Y-axis) and 2Ch (Z-axis) while LSB acceleration value is located at addresses 29h (X-axis), 2Bh (Yaxis) and 2Dh (Z-axis). In Little Endian representation (Default, BLE=‘0‘) the order is inverted (refer to data register description for more details).

BOOT bit is used to refresh the content of internal registers stored in the flash memory block. At the device power up the content of the flash memory block is transferred to the internal registers related to trimming functions to permit a good behavior of the device itself. If for any reason the content of trimming registers was changed it is sufficient to use this bit to restore correct values. When BOOT bit is set to ‘1’ the content of internal flash is copied inside corresponding internal registers and it is used to calibrate the device. These values are factory trimmed and they are different for every accelerometer. They permit a good behavior of the device and normally they have not to be changed. At the end of the boot process the BOOT bit is set again to ‘0’.

IEN bit is used to switch the value present on data-ready pad between Data-Ready signal and Interrupt signal. At power up the Data-ready signal is chosen. It is however necessary to modify DRDY bit to enable Data-Ready signal generation.

DRDY bit is used to enable Data-Ready (RDY/INT) pin activation. If DRDY bit is ‘0’ (default value) on Data-Ready pad a ‘0’ value is present. If a Data-Ready signal is desired it is necessary to set to ‘1’ DRDY bit. Data-Ready signal goes to ‘1’ whenever a new data is available for all the enabled axis. For example if Z-axis is disabled, Data-Ready signal goes to ‘1’ when new values are available for both X and Y axis. Data-Ready signal comes back to ‘0’ when all the registers containing values of the enabled axis are read. To be sure not to loose any data coming from the accelerometer data registers must be read before a new Data-Ready rising edge is generated. In this case Data-ready signal will have the same frequency of the data rate chosen.

SIM bit selects the SPI Serial Interface Mode. When SIM is ‘0’ (default value) the 4-wire interface mode is selected. The data coming from the device are sent to SDO pad. In 3-wire interface mode output data are sent to SDA/SDI pad.

DAS bit permits to decide between 12 bit right justified and 16 bit left justified representation of data coming from the device. The first case is the default case and the most significant bits are replaced by the bit representing the sign.

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7.10 CTRL_REG3 (22h)

Table 34. Register (22h)

ECK HPDD HPFF FDS res res CFS1 CFS0

Table 35. Register description (22h)

ECK

External Clock. Default value: 0 (0: clock from internal oscillator; 1: clock from external pad)

HPDD

HPFF

FDS

CFS1, CFS0

FDS bit enables (FDS=1) or bypass (FDS=0) the high pass filter in the signal chain of the sensor.

CFS1, CFS0 bits defines the coefficient Hpc to be used to calculate the -3dB cut-off frequency of the high pass filter:

High Pass filter enabled for Direction Detection. Default value: 0 (0: filter bypassed; 1: filter enabled)

High Pass filter enabled for Free-Fall and Wake-Up. Default value: 0 (0: filter bypassed; 1: filter enabled)

Filtered Data Selection. Default value: 0 (0: internal filter bypassed; 1: data from internal filter)

High-pass filter Cut-off Frequency Selection. Default value: 00 (00: Hpc=512 01: Hpc=1024 10: Hpc=2048 11: Hpc=4096)

cutoff

7.11 HP_FILTER_RESET (23h)

Dummy register. Reading at this address zeroes instantaneously the content of the internal high pass-filter. Read data is not significant.

0.318

-------------- -

Hpc

ODRx

-----------------

⋅=

7.12 STATUS_REG (27h)

Table 36. Register (27h)

ZYXOR ZOR YOR XOR ZYXDA ZDA YDA XDA

Table 37. Register description (27h)

ZYXOR X, Y and Z axis Data Overrun

ZOR Z axis Data Overrun

YOR Y axis Data Overrun

XOR X axis Data Overrun

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LIS3LV02DL Register description

Table 37. Register description (continued) (27h)

ZYXDA X, Y and Z axis new Data Available

ZDA Z axis new Data Available

YDA Y axis new Data Available

XDA X axis new Data Available

The content of this register is updated every ODR cycle, regardless of BDU bit value in CTRL_REG2.

7.13 OUTX_L (28h)

Table 38. Register (28h)

XD7 XD6 XD5 XD4 XD3 XD2 XD1 XD0

Table 39. Register description (28h)

XD7, XD0 X axis acceleration data LSB

In Big Endian Mode (bit BLE in CTRL_REG2 set to ‘1’) the content of this register is the MSB acceleration data and depends on bit DAS in CTRL_REG2 register as described in the following section.

7.14 OUTX_H (29h)

Table 40. Register (29h)

XD15 XD14 XD13 XD12 XD11 XD10 XD9 XD8

Table 41. Register description (29h)

XD15, XD8 X axis acceleration data MSB

When reading the register in “12 bit right justified” mode the most significant bits (15:12) are replaced with bit 11 (i.e. XD15-XD12=XD11, XD11, XD11, XD11).

In Big Endian Mode (bit BLE in CTRL_REG2 set to ‘1’) the content of this register is the LSB acceleration data.

7.15 OUTY_L (2Ah)

Table 42. Register (2Ah)

YD7 YD6 YD5 YD4 YD3 YD2 YD1 YD0

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Table 43. Register description (2Ah)

YD7, YD0 Y axis acceleration data LSB

In Big Endian Mode (bit BLE in CTRL_REG2 set to ‘1’) the content of this register is the MSB acceleration data and depends on bit DAS in CTRL_REG2 register as described in the following section.

7.16 OUTY_H (2Bh)

Table 44. Register (2Bh)

YD15 YD14 YD13 YD12 YD11 YD10 YD9 YD8

Table 45. Register description (2Bh)

YD15, YD8 Y axis acceleration data MSB

When reading the register in “12 bit right justified” mode the most significant bits (15:12) are replaced with bit 11 (i.e. YD15-YD12=YD11, YD11, YD11, YD11).

In Big Endian Mode (bit BLE in CTRL_REG2 set to ‘1’) the content of this register is the LSB acceleration data.

7.17 OUTZ_L (2Ch)

Table 46. Register (2Ch)

ZD7 ZD6 ZD5 ZD4 ZD3 ZD2 ZD1 ZD0

Table 47. Register description (2Ch)

ZD7, ZD0 Z axis acceleration data LSB

In Big Endian Mode (bit BLE in CTRL_REG2 set to ‘1’) the content of this register is the MSB acceleration data and depends on bit DAS in CTRL_REG2 register as described in the following section.

7.18 OUTZ_H (2Dh)

Table 48. Register (2Dh)

ZD15 ZD14 ZD13 ZD12 ZD11 ZD10 ZD9 ZD8

Table 49. Register description (2Dh)

ZD15, ZD8 Z axis acceleration data MSB

When reading the register in “12 bit right justified” mode the most significant bits (15:12) are replaced with bit 11 (i.e. ZD15-ZD12=ZD11, ZD11, ZD11, ZD11).

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LIS3LV02DL Register description

In Big Endian Mode (bit BLE in CTRL_REG2 set to ‘1’) the content of this register is the LSB acceleration data.

7.19 FF_WU_CFG (30h)

Table 50. Register (30h)

AOI LIR ZHIE ZLIE YHIE YLIE XHIE XLIE

Table 51. Register description (30h)

And/Or combination of Interrupt events. Default value: 0.

AOI

LIR

ZHIE

ZLIE

(0: OR combination of interrupt events; 1: AND combination of interrupt events)

Latch interrupt request. Default value: 0. (0: interrupt request not latched; 1: interrupt request latched)

Enable Interrupt request on Z High event. Default value: 0. (0: disable interrupt request; 1: enable interrupt request on measured accel. value higher than preset threshold)

Enable Interrupt request on Z Low event. Default value: 0. (0: disable interrupt request; 1: enable interrupt request on measured accel. value lower than preset threshold)

Enable Interrupt request on Y High event. Default value: 0.

YHIE

YLIE

XHIE

XLIE

(0: disable interrupt request; 1: enable interrupt request on measured accel. value higher than preset threshold)

Enable Interrupt request on Y Low event. Default value: 0. (0: disable interrupt request; 1: enable interrupt request on measured accel. value lower than preset threshold)

Enable Interrupt request on X High event. Default value: 0. (0: disable interrupt request; 1: enable interrupt request on measured accel. value higher than preset threshold)

Enable Interrupt request on X Low event. Default value: 0. (0: disable interrupt request; 1: enable interrupt request on measured accel. value lower than preset threshold)

Free-fall and inertial wake-up configuration register.

7.20 FF_WU_SRC (31h)

Table 52. Register (31h)

X IA ZHZLYHYLXHXL

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Table 53. Register description (31h)

Interrupt Active. Default value: 0

(0: no interrupt has been generated; 1: one or more interrupt events have been generated)

Z High. Default value: 0 (0: no interrupt; 1: Z High event has occurred)

Z Low. Default value: 0 (0: no interrupt; 1: Z Low event has occurred)

Y High. Default value: 0 (0: no interrupt; 1: Y High event has occurred)

Y Low. Default value: 0 (0: no interrupt; 1: Y Low event has occurred)

X High. Default value: 0 (0: no interrupt; 1: X High event has occurred)

X Low. Default value: 0 (0: no interrupt; 1: X Low event has occurred)

7.21 FF_WU_ACK (32h)

Dummy register. If LIR bit in FF_WU_CFG register is set to ‘1’, a reading at this address allows the FF_WU_SRC register refresh. Read data is not significant.

7.22 FF_WU_THS_L (34h)

Table 54. Register (34h)

THS7 THS6 THS5 THS4 THS3 THS2 THS1 THS0

Table 55. Register description (34h)

THS7, THS0 Free-fall / Inertial Wake Up Acceleration Threshold LSB

7.23 FF_WU_THS_H (35h)

Table 56. Register (35h)

THS15 THS14 THS13 THS12 THS11 THS10 THS9 THS8

Table 57. Register description (35h)

THS15, THS8 Free-fall / Inertial Wake Up Acceleration Threshold MSB

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LIS3LV02DL Register description

7.24 FF_WU_DURATION (36h)

Table 58. Register (36h)

FWD7 FWD6 FWD5 FWD4 FWD3 FWD2 FWD1 FWD0

Table 59. Register description (36h)

FWD7, FWD0 Minimum duration of the Free-fall/Wake-up event

This register sets the minimum duration of the free-fall/wake-up event to be recognized.

7.25 DD_CFG (38h)

Table 60. Register (38h)

IEND LIR ZHIE ZLIE YHIE YLIE XHIE XLIE

Table 61. Register description (38h)

Interrupt enable on Direction change. Default value: 0

IEND

LIR

ZHIE

ZLIE

YHIE

YLIE

(0: disabled; 1: interrupt signal enabled)

Latch Interrupt request into DD_SRC reg with the DD_SRC reg cleared by reading DD_ACK reg. Default value: 0. (0: interrupt request not latched; 1: interrupt request latched)

Enable interrupt generation on Z High event. Default value: 0 (0: disable interrupt request; 1: enable interrupt request on measured accel. value higher than preset threshold)

Enable interrupt generation on Z Low event. Default value: 0 (0: disable interrupt request; 1: enable interrupt request on measured accel. value lower than preset threshold)

Enable interrupt generation on Y High event. Default value: 0 (0: disable interrupt request; 1: enable interrupt request on measured accel. value higher than preset threshold)

Enable interrupt generation on Y Low event. Default value: 0 (0: disable interrupt request; 1: enable interrupt request on measured accel. value lower than preset threshold)

Duration s()

FF_WU_DURATION (Dec)

------------------------------------------------------------------------= ODR

39/48

Table 61. Register description (continued) (38h)

Enable interrupt generation on X High event. Default value: 0

XHIE

XLIE

(0: disable interrupt request; 1: enable interrupt request on measured accel. value higher than preset threshold)

Enable interrupt generation on X Low event. Default value: 0 (0: disable interrupt request; 1: enable interrupt request on measured accel. value lower than preset threshold)

Direction-detector configuration register.

7.26 DD_SRC (39h)

Table 62. Register (39h)

X IA ZHZLYHYLXHXL

Table 63. Register description (39h)

Interrupt event from direction change.

(0: no direction changes detected; 1: direction has changed from previous measurement)

Z High. Default value: 0 (0: Z below THSI threshold; 1: Z accel. exceeding THSE threshold along positive direction of acceleration axis)

Z Low. Default value: 0

(0: Z below THSI threshold; 1: Z accel. exceeding THSE threshold along negative direction of acceleration axis)

Y High. Default value: 0 (0: Y below THSI threshold; 1: Y accel. exceeding THSE threshold along positive direction of acceleration axis)

Y Low. Default value: 0 (0: Y below THSI threshold; 1: Y accel. exceeding THSE threshold along negative direction of acceleration axis)

X High. Default value: 0 (0: X below THSI threshold; 1: X accel. exceeding THSE threshold along positive direction of acceleration axis)

X Low. Default value: 0 (0: X below THSI threshold; 1: X accel. exceeding THSE threshold along negative direction of acceleration axis)

Direction detector source register.

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LIS3LV02DL Register description

7.27 DD_ACK (3Ah)

Dummy register. If LIR bit in DD_CFG register is set to ‘1’, a reading at this address allows the DD_SRC register refresh. Read data is not significant.

7.28 DD_THSI_L (3Ch)

Table 64. Register (3Ch)

THSI7 THSI6 THSI5 THSI4 THSI3 THSI2 THSI1 THSI0

Table 65. Register description (3Ch)

THSI7, THSI0 Direction detection Internal Threshold LSB

7.29 DD_THSI_H (3Dh)

Table 66. Register (3Dh)

THSI15 THSI14 THSI13 THSI12 THSI11 THSI10 THSI9 THSI8

Table 67. Register description (3Dh)

THSI15, THSI8 Direction detection Internal Threshold MSB

7.30 DD_THSE_L (3Eh)

Table 68. Register (3Eh)

THSE7 THSE6 THSE5 THSE4 THSE3 THSE2 THSE1 THSE0

Table 69. Register description (3Eh)

THSE7, THSE0 Direction detection External Threshold LSB

7.31 DD_THSE_H (3Fh)

Table 70. Register (3Fh)

THSE15 THSE14 THSE13 THSE12 THSE11 THSE10 THSE9 THSE8

Table 71. Register description (3Fh)

THSE15, THSE8 Direction detection External Threshold MSB

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Typical performance characteristics LIS3LV02DL

8 Typical performance characteristics

8.1 Mechanical characteristics at 25°C

Figure 12. X-axis zero-g level at 3.3 V Figure 13. X-axis sensitivity at 3.3 V

Percent of parts [%]

−60 −40 −20 0 20 40 60 Zero−g Level Offset [mg]

Percent of parts [%]

940 960 980 1000 1020 1040 1060 1080 1100 1120

Sensitivity [LSB/g]

Figure 14. Y-axis zero-g level at 3.3 V Figure 15. Y-axis sensitivity at 3.3 V

Percent of parts [%]

−60 −40 −20 0 20 40 60 Zero−g Level Offset [mg]

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940 960 980 1000 1020 1040 1060 1080 1100 1120

Sensitivity [LSB/g]

LIS3LV02DL Typical performance characteristics

Figure 16. Z-axis zero-g level at 3.3 V Figure 17. Z-axis Sensitivity at 3.3 V

Percent of parts [%]

−60 −40 −20 0 20 40 60

Zero−g Level Offset [mg]

Percent of parts [%]

940 960 980 1000 1020 1040 1060 1080 1100 1120

Sensitivity [LSB/g]

8.2 Mechanical characteristics derived from measurement in the

-40°C to +85°C temperature range

Figure 18. X-axis zero-g level change vs.

temperature at 3.3 V

Percent of parts [%]

−1.5 −1 −0.5 0 0.5 1 1.5 Zero−g Level drift [mg/oC]

Figure 19. X-axis sensitivity change vs.

temperature at 3.3 V

Percent of parts [%]

−0.05 −0.045 −0.04 −0.035 −0.03 −0.025 −0.02 −0.015 −0.01 −0.005 0 Sensitivity drift [%/oC]

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Typical performance characteristics LIS3LV02DL

Figure 20. Y-axis zero-g level change vs.

temperature at 3.3 V

Percent of parts [%]

−1 −0.8 −0.6 −0.4 −0.2 0 0.2 0.4 0.6 0.8 1 Zero−g Level drift [mg/oC]

Figure 22. Z-axis zero-g level change vs.

temperature at 3.3 V

Percent of parts [%]

Figure 21. Y-axis sensitivity change vs.

temperature at 3.3 V

Percent of parts [%]

−0.015 −0.01 −0.005 0 0.005 0.01 0.015 0.02 Sensitivity drift [%/oC]

Figure 23. Z-axis sensitivity change vs.

temperature at 3.3 V

Percent of parts [%]

−2.5 −2 −1.5 −1 −0.5 0 0.5 1 1.5 2 2.5 Zero−g Level drift [mg/oC]

−0.05 −0.04 −0.03 −0.02 −0.01 0 0.01 0.02 Sensitivity drift [%/oC]

8.3 Electro-mechanical characteristics at 25°C

Figure 24. X and Y axis zero-g level as

function of supply voltage

Zero−g level [mg]

−20

−40

−60 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6

Supply Voltage [V]

Figure 25. Z axis zero-g level as function of

supply voltage

100

Zero−g level [mg]

−20

−40 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6

Supply Voltage [V]

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LIS3LV02DL Typical performance characteristics

Figure 26. Current consumption in Power-

Down mode (Vdd=3.3 V)

Percent of parts [%]

−5 −2.5 0 2.5 5 Current consumption [uA]

Figure 27. Current consumption in operational

mode (Vdd=3.3 V)

Percent of parts [%]

0 550 600 650 700 750

Current consumption [uA]

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Package information LIS3LV02DL

9 Package information

In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK

ECOPACK

specifications are available at: www.st.com.

Figure 28. LGA-16 mechanical data and package dimensions

DIM.

A1 0.92 1 0.0394

A2 0.7 0.0276

A3 0.180 0.220 0.260 0.0071 0.0087 0.0102

D1 4.250 4.400 4.550 0.1673 0.1732 0.1791

E1 7.350 7.500 7.650 0.2894 0.2953 0.3012

e 1.0 0.0394

d 0.3 0.0118

L1 5.000 0.1969

N 2.5 0.0984

N1 1.2 0.0472

P1 0.9 65 0.975 0.985 0.0380 0.0384 0.0388

P2 0.64 0.65 0 .66 0.0252 0.0256 0.0260

T1 0.75 0.8 0.85 0.0295 0.0315 0.0335

T2 0.45 0.5 0.55 0.0177 0.0197 0.0217

R 1.200 1.600 0.0472 0.0630

h 0.150 0.0059

k 0.050 0.0020

i 0.100 0.0039

s 0.100 0.0039

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

LGA16 (4.4x7.5x1mm)

Land Grid Array Package

is an ST trademark.

OUTLINE AND

MECHANICAL DATA

(4 x)

BACh

Detail A

Metal Pad

BACi

Solder mask

opening

46/48

seating plane

BACh

Detail A

12 4 56

91011121314

7863679 B

LIS3LV02DL Revision history

10 Revision history

Table 72. Document revision history

Date Revision Changes

15-Feb-2006 1 Initial release.

Added two new sections:

15-Jan-2008 2

Section 2.3: Communication interface characteristics and Section 8: Typical performance characteristics.

Content reworked to improve readability

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LIS3LV02DL

Please Read Carefully:

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48/48

ST LIS3LV02DL User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table 1. Device summary

1 Block diagram and pin description

1.1 Block diagram

Figure 1. Block diagram

1.2 LGA-16 pin description

Figure 2. Pin connection

Table 2. Pin description

2 Mechanical and electrical specifications

2.1 Mechanical characteristics

2.2 Electrical characteristics

2.3 Communication interface characteristics

2.3.1 SPI - serial peripheral interface

Table 6. SPI Slave Timing Values

2.3.2 I2C - Inter IC control interface

Table 7. I2C slave timing values

2.4 Absolute maximum ratings

Table 8. Absolute maximum ratings

2.5 Terminology

2.5.1 Sensitivity

2.5.2 Zero-g level

2.5.3 Self test

3 Functionality

3.1 Sensing element

3.2 IC interface

3.3 Factory calibration

4 Application hints

Figure 5. LIS3LV02DL electrical connection

4.1 Soldering Information

5 Digital interfaces

Table 9. Serial interface pin description

5.1 I2C serial interface

Table 10. Serial interface pin description

5.1.1 I2C operation

Table 11. Transfer when master is writing one byte to slave

Table 12. Transfer when master is writing multiple bytes to slave

Table 13. Transfer when master is receiving (reading) one byte of data from slave

Table 14. Transfer when master is receiving (reading) multiple bytes of data from slave

5.2 SPI bus interface

Figure 6. Read and write protocol

5.2.1 SPI read

Figure 7. SPI read protocol

Figure 8. Multiple bytes SPI read protocol (2 bytes example)

5.2.2 SPI write

Figure 9. SPI write protocol

Figure 10. Multiple bytes SPI write protocol (2 bytes example)

5.2.3 SPI Read in 3-wires mode

Figure 11. SPI read protocol in 3-wires mode

6 Register mapping

Table 15. Registers address map

7 Register description

7.1 WHO_AM_I (0Fh)

Table 16. Register (0Fh)

Table 17. Register description (0Fh)

7.2 OFFSET_X (16h)

Table 18. Register (16h)

Table 19. Register description (16h)

7.3 OFFSET_Y (17h)

Table 20. Register (17h)

Table 21. Register description (17h)

7.4 OFFSET_Z (18h)

Table 22. Register (18h)

Table 23. Register description (18h)

7.5 GAIN_X (19h)

Table 24. Register (19h)

Table 25. Register description (19h)

7.6 GAIN_Y (1Ah)

Table 26. Register (1Ah)

Table 27. Register description (1Ah)

7.7 GAIN_Z (1Bh)

Table 28. Register (1Bh)

Table 29. Register description (1Bh)

7.8 CTRL_REG1 (20h)

Table 30. Register (20h)

Table 31. Register description (20h)

7.9 CTRL_REG2 (21h)

Table 32. Register (21h)