LIS2HH12TR - STMicroelectronics

This is information on a product in full production.

December 2015 DocID025344 Rev 5 1/47

LIS2HH12

MEMS digital output motion sensor:

ultra-low-power high-performance 3-axis "pico" accelerometer

Datasheet - production data

Features

Wide supply voltage, 1.71 V to 3.6 V

Independent IOs supply (1.8 V) and supply

voltage compatible

Ultra-low power consumption

2g/4g/8g full-scale

I2C/SPI digital output interface

16-bit data output

Embedded temperature sensor

Embedded self-test

Embedded FIFO

10000 g high shock survivability

ECOPACK®, RoHS and “Green” compliant

Applications

Motion-controlled user interfaces

Gaming and virtual reality

Pedometers

Intelligent power saving for handheld devices

Display orientation

Click/double-click recognition

Impact recognition and logging

Vibration monitoring and compensation

Description

The LIS2HH12 is an ultra-low-power high-

performance three-axis linear accelerometer

belonging to the “pico” family.

The LIS2HH12 has full scales of 2g/4g/8g and

is capable of measuring accelerations with output

data rates from 10 Hz to 800 Hz.

The self-test capability allows the user to check

the functioning of the sensor in the final

application.

The LIS2HH12 has an integrated first-in, first-out

(FIFO) buffer allowing the user to store data in

order to limit intervention by the host processor.

The LIS2HH12 is available in a small thin plastic

land grid array package (LGA) and it is

guaranteed to operate over an extended

temperature range from -40 °C to +85 °C

LGA-12

(2.0x2.0x1.0 mm)

Table 1. Device summary

Order codes Temperature

range [C] Package Packaging

LIS2HH12 -40 to +85 LGA-12 Tray

LIS2HH12TR -40 to +85 LGA-12 Tape and

reel

www.st.com

Contents LIS2HH12
2/47 DocID025344 Rev 5
Contents
Block diagram and pin description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
2 Pin description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
Mechanical and electrical specifications   . . . . . . . . . . . . . . . . . . . . . . . 10
1 Mechanical characteristics  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
3 Temperature sensor characteristics  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
4 Communication interface characteristics  . . . . . . . . . . . . . . . . . . . . . . . . .  12
4.1 SPI - serial peripheral interface  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 I2C - inter-IC control interface   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5 Absolute maximum ratings  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
6 Terminology and functionality  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15
6.1 Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2 Zero-g level   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.3 Self-test  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7 Sensing element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15
8 IC interface  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  16
Factory calibration   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Application hints  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
1 Soldering information  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  17
Digital main blocks  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
1 Activity/Inactivity function  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  18
2 Data stabilization time / ODR change   . . . . . . . . . . . . . . . . . . . . . . . . . . .  19
3 FIFO  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19
3.1 Bypass mode  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.2 FIFO mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.3 Stream mode  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4 Stream-to-FIFO mode  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.5 Bypass-to-Stream mode   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

DocID025344 Rev 5 3/47
LIS2HH12 Contents
47
3.6 Bypass-to-FIFO mode  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.7 Retrieving data from FIFO  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.8 FIFO multiple reads (burst)   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Digital interfaces  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
1 I2C serial interface  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
1.1 I2C operation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2 SPI bus interface   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
2.1 SPI read  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
2.2 SPI write   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.3 SPI read in 3-wire mode   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Register mapping   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Register description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1 TEMP_L (0Bh), TEMP_H (0Ch)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
2 WHO_AM_I (0Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
3 ACT_THS (1Eh)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
4 ACT_DUR (1Fh)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
5 CTRL1 (20h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
6 CTRL2 (21h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
7 CTRL3 (22h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
8 CTRL4 (23h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
9 CTRL5 (24h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  35
10 CTRL6 (25h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  36
11 CTRL7 (26h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  36
12 STATUS (27h)   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
13 OUT_X_L (28h) - OUT_X_H (29h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
14 OUT_Y_L (2Ah) - OUT_Y_H (2Bh)   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
15 OUT_Z_L (2Ch) - OUT_Z_H (2Dh)   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
16 FIFO_CTRL (2Eh)   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
17 FIFO_SRC (2Fh)   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
18 IG_CFG1 (30h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  39
19 IG_SRC1 (31h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  39
20 IG_THS_X1 (32h), IG_THS_Y1 (33h), IG_THS_Z1 (34h)  . . . . . . . . . . . .  40

Contents LIS2HH12
4/47 DocID025344 Rev 5
21 IG_DUR1 (35h)   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  40
22 IG_CFG2 (36h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  40
23 IG_SRC2 (37h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  41
24 IG_THS2 (38h)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  41
25 IG_DUR2 (39h)   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  41
26 XL_REFERENCE (3Ah), XH_REFERENCE (3Bh)   . . . . . . . . . . . . . . . . .  42
27 YL_REFERENCE (3Ch), YH_REFERENCE (3Dh)  . . . . . . . . . . . . . . . . .  42
28 ZL_REFERENCE (3Eh), ZH_REFERENCE (3Fh) . . . . . . . . . . . . . . . . . .  42
Package information  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
1 LGA-12 package information  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  43
2 LGA-12 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
Revision history   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

DocID025344 Rev 5 5/47
LIS2HH12 List of tables
47
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 3. Mechanical characteristics @ Vdd = 2.5 V, T = 25 °C unless otherwise noted  . . . . . . . . . 10
Table 4. Electrical characteristics @ Vdd = 2.5 V, T = 25 °C unless otherwise noted . . . . . . . . . . . 11
Table 5. Temperature sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 6. SPI slave timing values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 7. I2C slave timing values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 8. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 9. Activity/Inactivity function control registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 10. Number of samples to be discarded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 11. Serial interface pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 12. I2C terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Table 13. SAD+Read/Write patterns  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 14. Transfer when master is writing one byte to slave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 15. Transfer when master is writing multiple bytes to slave . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 16. Transfer when master is receiving (reading) one byte of data from slave  . . . . . . . . . . . . . 25
Table 17. Transfer when master is receiving (reading) multiple bytes of data from slave  . . . . . . . . . 25
Table 18. Register map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 19. WHO_AM_I register default values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 20. ACT_THS register default values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 21. ACT_DUR register default values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 22. Control register 1  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 23. Control register 1 description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 24. ODR register setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 25. Low-pass cutoff frequency in high resolution mode (HR = 1) . . . . . . . . . . . . . . . . . . . . . . . 32
Table 26. Control register 2  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 27. Control register 2 description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 28. Control register 3  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 29. Control register 3 description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 30. Control register 4  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 31. Control register 4 description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 32. Control register 5  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 33. Control register 5 description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 34. Self-test mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 35. Control register 6  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 36. Control register 6 description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 37. Control register 7  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 38. Control register 7 description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 39. Status register  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 40. Status register description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 41. FIFO control register   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 42. FIFO control register description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 43. FIFO mode selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 44. FIFO status register  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 45. FIFO status register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 46. IG_CFG1 configuration register  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Table 47. IG_CFG1 configuration register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 48. IG1_SRC1 register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

List of tables LIS2HH12
6/47 DocID025344 Rev 5
Table 49. IG1_SRC1 register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Table 50. IG1_THS register  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 51. IG1_THS description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 52. IG_DUR1 duration  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 53. IG_DUR1 duration description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Table 54. IG_CFG2 register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 55. IG_CFG2 register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 56. IG_SRC2 register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 57. IG_SRC2 register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 58. IG_THS2 register  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 59. IG_THS2 register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 60. IG_DUR2 register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 61. IG_DUR2 register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 62. LGA-12 2x2x1 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table 63. Reel dimensions for carrier tape of LGA-12 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 64. Document revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

DocID025344 Rev 5 7/47
LIS2HH12 List of figures
47
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 2. Pin connections  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 3. SPI slave timing diagram  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 4. I2C slave timing diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 5. LIS2HH12 electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Figure 6. Stream mode  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 7. FIFO multiple reads  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 8. Read and write protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 9. SPI read protocol  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 10. Multiple byte SPI read protocol (2-byte example). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 11. SPI write protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 12. Multiple byte SPI write protocol (2-byte example). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 13. SPI read protocol in 3-wire mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 14. LGA-12 2x2x1 package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Figure 15. Carrier tape information for LGA-12 package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 16. LGA-12 package orientation in carrier tape  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 17. Reel information for carrier tape of LGA-12 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Block diagram and pin description LIS2HH12

8/47 DocID025344 Rev 5

1 Block diagram and pin description

1.1 Block diagram

Figure 1. Block diagram

1.2 Pin description

Figure 2. Pin connections

CHARGE

AMPLIFIER

Y+

Z+

Y-

Z-

X+

X-

I2C

SPI

SCL/SPC

SDA/SDI/SDO

SDO/SA0

INT1

CLOCK

TRIMMING

CIRCUITS

REFERENCESELF TEST

A/D

CONVERTER1

INT2

MUX

CONTROL

LOGIC

TEMP. SENSOR

FIFO

A/D

CONVERTER2

(TOP VIEW)

DIRECTION OF THE

DETECTABLE

ACCELERATIONS

Vdd_IO

L/SPC

SDA/SDI/SDO

SDO/SA0

RES

GND

INT1

INT2

RES

Vdd

RES

(BOTTOM VIEW)

Pin 1 indicator

RES

12 14

GND

L/SPC

SDA/SDI/SDO

SDO/SA0

GND

RES

INT 1

Vdd_IO

(BOTTOM VIEW)

GND

INT 2

Vdd

DocID025344 Rev 5 9/47

LIS2HH12 Block diagram and pin description

Table 2. Pin description

Pin# Name Function

1SCL

SPC

I2C serial clock (SCL)

SPI serial port clock (SPC)

2CS

SPI enable

I2C/SPI mode selection (1: SPI idle mode / I2C communication

enabled; 0: SPI communication mode / I2C disabled)

3SDO

SA0

SPI serial data output (SDO)

I2C less significant bit of the device address (SA0)

SDA

SDI

SDO

I2C serial data (SDA)

SPI serial data input (SDI)

3-wire interface serial data output (SDO)

5 RES Connect to GND

6 GND 0 V supply

7 GND 0 V supply

8 GND 0 V supply

9 Vdd Power supply

10 Vdd_IO Power supply for I/O pins

11 INT2 Interrupt pin 2

12 INT1 Interrupt pin 1

Mechanical and electrical specifications LIS2HH12

10/47 DocID025344 Rev 5

2 Mechanical and electrical specifications

2.1 Mechanical characteristics

Table 3. Mechanical characteristics @ Vdd = 2.5 V, T = 25 °C unless otherwise noted (1)

Symbol Parameter Test conditions Min. Typ.(2) Max. Unit

FS Measurement range(3)

±2.0 g

±4.0 g

±8.0 g

So Sensitivity

@ FS ±2.0 g 0.061 mg/digit

@ FS ±4.0 g 0.122 mg/digit

@ FS ±8.0 g 0.244 mg/digit

TCSo Sensitivity change vs.

temperature 0.01 %/°C

TyOff Typical zero-g level

offset accuracy(4) ±30 mg

TCOff Zero-g level change

vs. temperature(4) Delta from 25 °C ±0.25 mg/°C

Ton Turn-on time

Number of samples to be discarded

from power-down to active mode

CTRL4 (23h) (BW_SCALE_ODR) = 0

1# of

samples

ST Self-test positive

difference(5) 70 1500 mg

Top Operating

temperature range -40 +85 °C

1. The product is factory calibrated at 2.5 V. The operational power supply range is from 1.71 V to 3.6 V.

2. Typical specifications are not guaranteed.

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

4. Offset can be eliminated by enabling the built-in high-pass filter.

“Self-test positive difference” is defined as: OUTPUT[mg](CTRL5 ST2, ST1 bits=01)

- OUTPUT[mg](

CTRL5 ST2, ST1 bits=00

DocID025344 Rev 5 11/47

LIS2HH12 Mechanical and electrical specifications

2.2 Electrical characteristics

2.3 Temperature sensor characteristics

@ Vdd =2.5 V, T=25 °C unless otherwise noted

Table 4. Electrical characteristics @ Vdd = 2.5 V, T = 25 °C unless otherwise noted (1)

Symbol Parameter Test conditions Min. Typ.(2) Max. Unit

Vdd Supply voltage 1.71 2.5 3.6 V

Vdd_IO I/O pins supply voltage(3) 1.71 Vdd+0.1 V

IddA Current consumption

in active mode

ODR 100-800 Hz 180 μA

ODR 50 Hz 110 μA

ODR 10 Hz 50 μA

IddPdn Current consumption in

power-down mode 5μA

VIH Digital high-level input voltage 0.8*Vdd_IO V

VIL Digital low-level input voltage 0.2*Vdd_IO V

Tboot Boot time(4) 20 ms

Top Operating temperature range -40 +85 °C

1. The product is factory calibrated at 2.5 V. The operational power supply range is from 1.71 V to 3.6 V.

2. Typical specifications are not guaranteed.

3. It is possible to remove Vdd maintaining Vdd_IO without blocking the communication busses, in this condition the

measurement chain is powered off.

4. Time to complete the entire boot sequence: from Vdd on until all configuration and calibration parameters are correctly

loaded into device registers.

Table 5. Temperature sensor characteristics

Symbol Parameter Min. Typ.(1) Max. Unit

TSDr Temperature sensor output change

vs. temperature 8 digit/°C(2)

TODR Temperature refresh rate 10 Hz

Top Operating temperature range -40 +85 °C

1. Typical specifications are not guaranteed.

2. 11-bit resolution.

Mechanical and electrical specifications LIS2HH12

12/47 DocID025344 Rev 5

2.4 Communication interface characteristics

2.4.1 SPI - serial peripheral interface

Subject to general operating conditions for Vdd and Top.

Figure 3. SPI slave timing diagram

Note: Measurement points are done at 0.2·Vdd_IO and 0.8·Vdd_IO, for both input and output

ports.

Table 6. SPI slave timing values

Symbol Parameter

Value(1)

Unit

Min Max

tc(SPC) SPI clock cycle 100 ns

fc(SPC) SPI clock frequency 10 MHz

tsu(CS) CS setup time 6

th(CS) CS hold time 8

tsu(SI) SDI input setup time 5

th(SI) SDI input hold time 15

tv(SO) SDO valid output time 50

th(SO) SDO output hold time 9

tdis(SO) SDO output disable time 50

1. Values are guaranteed at 10 MHz clock frequency for SPI with both 4 and 3 wires, based on characterization results, not

tested in production.

SPC

SD I

SD O

su (CS)

v(SO )

h(SO )

h(SI)

su (SI)

h(CS)

dis(SO )

c(SPC)

MSB IN

MSB OUT LSB OUT

LSB IN

DocID025344 Rev 5 13/47

LIS2HH12 Mechanical and electrical specifications

2.4.2 I2C - inter-IC control interface

Subject to general operating conditions for Vdd and Top.

Figure 4. I2C slave timing diagram

Note: Measurement points are done at 0.2·Vdd_IO and 0.8·Vdd_IO, for both ports.

Table 7. I2C slave timing values

Symbol Parameter

I2C standard mode (1) I2C fast mode (1)

Unit

Min Max Min Max

f(SCL) SCL clock frequency 0 100 0 400 kHz

tw(SCLL) SCL clock low time 4.7 1.3

μs

tw(SCLH) SCL clock high time 4.0 0.6

tsu(SDA) SDA setup time 250 100 ns

th(SDA) SDA data hold time 0.01 3.45 0.01 0.9 μs

th(ST) START condition hold time 4 0.6

μs

tsu(SR)

Repeated START condition

setup time 4.7 0.6

tsu(SP) STOP condition setup time 4 0.6

tw(SP:SR)

Bus free time between STOP

and START condition 4.7 1.3

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

SDA

SCL

su(SP)

w(SCLL)

su(SDA)

su(SR)

h(ST)

w(SCLH)

h(SDA)

w(SP:SR)

START

REPEA TED

START

STOP

STA RT

Mechanical and electrical specifications LIS2HH12

14/47 DocID025344 Rev 5

2.5 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.

Note: Supply voltage on any pin should never exceed 4.8 V

Table 8. Absolute maximum ratings

Symbol Ratings Maximum value Unit

Vdd Supply voltage -0.3 to 4.8 V

Vdd_IO I/O pins supply voltage -0.3 to 4.8 V

Vin Input voltage on any control pin

(CS, SCL/SPC, SDA/SDI/SDO, SDO/SA0) -0.3 to Vdd_IO +0.3 V

APOW Acceleration (any axis, powered, Vdd = 2.5 V)

3000 for 0.5 ms g

10000 for 0.2 ms g

AUNP Acceleration (any axis, unpowered)

3000 for 0.5 ms g

10000 for 0.2 ms g

TOP Operating temperature range -40 to +85 °C

TSTG Storage temperature range -40 to +125 °C

ESD Electrostatic discharge protection 2 (HBM) kV

This device is sensitive to mechanical shock, improper handling can cause

permanent damage to the part.

This device is sensitive to electrostatic discharge (ESD), improper handling can

cause permanent damage to the part.

DocID025344 Rev 5 15/47

LIS2HH12 Mechanical and electrical specifications

2.6 Terminology and functionality

Terminology

2.6.1 Sensitivity

Sensitivity describes the gain of the sensor and can be determined by applying 1 g

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 (pointing to the sky) and noting the output value again. By doing

so, ±1 g 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 time. The sensitivity tolerance describes the

range of sensitivities of a large population of sensors.

2.6.2 Zero-g level

Zero-g level offset (TyOff) describes the deviation of an actual output signal from the ideal

output signal if no acceleration is present. A sensor in a steady state on a horizontal surface

will measure 0 g on the X-axis and 0 g on the Y-axis whereas the Z-axis will measure 1 g.

The output is ideally in the middle of the dynamic range of the sensor (content of OUT

registers 00h, data expressed as two’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 the 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 tolerance (TyOff)

describes the standard deviation of the range of Zero-g levels of a population of sensors.

Functionality

2.6.3 Self-test

The self-test allows checking the sensor functionality without moving it. The self-test

function is off when the self-test bits (ST) are programmed to ‘00‘. When the self-test bits are

changed, 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 are related to

the selected full scale through the device sensitivity. When the 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 in Table 3, then the sensor is working properly and the parameters

of the interface chip are within the defined specifications.

2.7 Sensing element

A proprietary process is used to create a surface micromachined accelerometer. The

technology allows processing 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. In order 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 molding

phase of the plastic encapsulation.

Factory calibration LIS2HH12

16/47 DocID025344 Rev 5

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 capacitor.

At steady-state the nominal value of the capacitors are a few pF and when an acceleration

is applied, the maximum variation of the capacitive load is in the fF range.

2.8 IC interface

The complete measurement chain is composed of a low-noise capacitive amplifier which

converts the capacitive unbalancing of the MEMS sensor into an analog voltage using an

analog-to-digital converter.

The acceleration data may be accessed through an I2C/SPI interface thus making the

device particularly suitable for direct interfacing with a microcontroller.

The LIS2HH12 features a data-ready signal which indicates when a new set of measured

acceleration data is available, thus simplifying data synchronization in the digital system that

uses the device.

3 Factory calibration

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

The trim values are stored inside the device in nonvolatile memory. Any time the device is

turned on, the trimming parameters are downloaded into the registers to be used during the

active operation. This allows using the device without further calibration.

DocID025344 Rev 5 17/47

LIS2HH12 Application hints

4 Application hints

Figure 5. LIS2HH12 electrical connections

The device core is supplied through the Vdd line while the I/O pads are supplied through the

Vdd_IO line. Power supply decoupling capacitors (100 nF ceramic, 10 μF aluminum) should

be placed as near as possible to pin 9 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 5). It is possible to remove Vdd while maintaining Vdd_IO

without blocking the communication bus, in this condition the measurement chain is

powered off.

The functionality of the device and the measured acceleration data are selectable and

accessible through the I2C or SPI interfaces. When using the I2C, CS must be tied high (i.e.

connected to Vdd_IO).

The functions, the threshold and the timing of the two interrupt pins (INT1 and INT2) can be

completely programmed by the user through the I2C/SPI interface.

4.1 Soldering information

The LGA package is compliant with the ECOPACK®, RoHS and “Green” standard.

It is qualified for soldering heat resistance according to JEDEC J-STD-020.

Leave “Pin 1 Indicator” unconnected during soldering.

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

Digital signal from/to signal controller.Signal levels are dened by proper selection of Vdd_IO

Vdd_IO

10μF

Vdd

100nF

GND

RES

L/SPC

SDA/SDI/SDO

SDO/SA0 GND

GND

INT 1

Vdd_IO

GND

INT 2

Vdd

100nF

Digital main blocks LIS2HH12

18/47 DocID025344 Rev 5

5 Digital main blocks

5.1 Activity/Inactivity function

The Activity/Inactivity recognition function allows reducing the power consumption of the

system in order to develop new smart applications.

When the Activity/Inactivity recognition function is activated, the LIS2HH12 is able to

automatically go to 10Hz sampling rate and to wake up as soon as the interrupt event has

been detected, increasing the output data rate and bandwidth.

With this feature the system may be efficiently switched from low-power mode to full

performance depending on user-selectable positioning and acceleration events, thus

ensuring power saving and flexibility.

The Activity/Inactivity recognition function is activated by writing the desired threshold in the

ACT_THS (1Eh) register. The high-pass filter is automatically enabled.

When the acceleration falls below the threshold for a duration of at least (8 ACT_DUR

+1)/ODR, the CTRL1 (20h) (ODR [2:0]) bits of CTRL1 are bypassed (Inactivity) and

internally set to 10Hz (ODR [2:0] = 001), but the content of the CTRL1 (20h) (ODR [2:0]) bits

are left untouched.

When the acceleration exceeds the threshold (ACT_THS (1Eh)), the ODR setting in CTRL1

(20h) is restored immediately (Activity).

Once the Activity/Inactivity detection function is enabled, the status can be brought out on

INT1 by setting the CTRL3 (22h) (INT1_INACT) bit to 1.

To disable the Activity/Inactivity detection function, set the content of the ACT_THS (1Eh)

Table 9. Activity/Inactivity function control registers

ACT_THS Full scale / 128 [mg]

ACT_DUR 8/ODR [s]

DocID025344 Rev 5 19/47
LIS2HH12 Digital main blocks
47
5.2  Data stabilization time / ODR change
The data stabilization time required when an ODR change is applied in order to have valid 
usable data depends on the BW and ODR selected. 
The table below provides the number of samples to be discarded in order to obtain valid 
usable data.
 
5.3 FIFO
The LIS2HH12 embeds an acceleration data FIFO for each of the three output channels, X, 
Y and Z. This allows consistent power saving for the system, since the host processor does 
not need to continuously poll data from the sensor, but it can wake up only when needed 
and burst the significant data out from the FIFO. This buffer can work according to the 
following different modes: Bypass mode, FIFO-mode, Stream mode, Stream-to-FIFO mode, 
Bypass-to-Stream, Bypass-to-FIFO. Each mode is selected by the FIFO_MODE bits in the 
FIFO_CTRL (2Eh) register. Programmable FIFO threshold level, FIFO empty or FIFO 
overrun events are available in the FIFO_CTRL (2Eh) register and can be set to generate 
dedicated interrupts on the INT1 or INT2 pin.
FIFO_SRC (2Fh) (EMPTY) is equal to '1' when no samples are available.
FIFO_SRC (2Fh)(FTH) goes to '1' if new data arrives and FIFO_SRC (2Fh)(FSS [4:0]) is 
greater than or equal to FIFO_CTRL (2Eh) (FTH [4:0]). FIFO_SRC (2Fh) (FTH) goes to '0' if 
reading X, Y, Z data slot from FIFO and FIFO_SRC (2Fh) (FSS [4:0]) is less than or equal to 
FIFO_CTRL (2Eh) (FTH [4:0]). 
FIFO_SRC (2Fh) (OVR) is equal to '1' if a FIFO slot is overwritten.
The FIFO feature is enabled by writing the CTRL3 (22h) (FIFO_EN) bit to '1' in control 
register 3. 
In order to guarantee the correct acquisition of data during the switching into and out of 
FIFO mode, the first sample acquired must be discarded.
5.3.1 Bypass mode
In Bypass mode (FIFO_CTRL (2Eh) (FMODE [2:0])= 000), the FIFO is not operational and it 
remains empty.
Bypass mode is also used to reset the FIFO when in FIFO mode.
Table 10. Number of samples to be discarded
ODR [Hz] BW = 400 Hz BW = 200 Hz BW = 100 Hz BW = 50 Hz
101---
501---
1001111
2001114
4001147
80014714

Digital main blocks LIS2HH12
20/47 DocID025344 Rev 5
5.3.2 FIFO mode
In FIFO mode (FIFO_CTRL (2Eh) (FMODE [2:0])= 001) data from the X, Y and Z channels 
are stored in the FIFO until it is full. An overrun interrupt can be enabled, CTRL3 (22h) 
(INT1_OVR)= '1', in order to be raised when the FIFO stops collecting data. When the 
overrun interrupt occurs, the first set of data has been overwritten and the FIFO stops 
collecting data from the input channels. To reset the FIFO content, Bypass mode should be 
written in the FIFO_CTRL (2Eh) register, setting the FMODE [2:0] bits to '000'. After this 
reset command, it is possible to restart FIFO mode, writing the value '001' in FIFO_CTRL 
(2Eh) (FMODE [2:0]).
The FIFO buffer can memorize 32 slots of X, Y and Z data, but the depth of the FIFO can be 
reduced using the CTRL3 (22h) (STOP_ FTH) bit. Setting the STOP_FTH bit to '1', FIFO 
depth is limited to FIFO_CTRL (2Eh) (FTH [4:0]) - 1.
5.3.3 Stream mode
Stream mode (FIFO_CTRL (2Eh) (FMODE [2:0]) = 010) provides a continuous FIFO 
update: as new data arrives, the older data is discarded.
An overrun interrupt can be enabled, CTRL3 (22h) (INT1_OVR) = '1', in order to read the 
entire content of the FIFO at once. If in the application no data can be lost and it is not 
possible to read at least one sample for each axis within one ODR period, a watermark 
interrupt can be enabled in order to read partially the FIFO and leave free memory slots for 
incoming data. Setting the FIFO_CTRL (2Eh) (FTH [4:0]) to value N, the number of X, Y and 
Z data samples that should be read at the rise of the watermark interrupt is up to (N+1).
In the latter case, reading all FIFO content before an overrun interrupt has occurred, the first 
data read is equal to the last data already read in previous burst, so the number of new data 
available in the FIFO depends on the previous reading (see FIFO_SRC (2Fh)behavior 
depicted in the following figures).
Figure 6. Stream mode

DocID025344 Rev 5 21/47
LIS2HH12 Digital main blocks
47
A watermark interrupt CTRL3 (22h) (INT1_FTH), CTRL6 (25h)(INT2_FTH) can be enabled 
in order to read data from the FIFO and leave free memory slots for incoming data. Setting 
the FIFO_CTRL (2Eh) (FTH [4:0]) to value N, the number of X, Y and Z data samples that 
should be read at the rise of the watermark interrupt, in order to read the entire FIFO 
content, is N + 1. 
5.3.4 Stream-to-FIFO mode
In Stream-to-FIFO mode (FIFO_CTRL (2Eh)(FMODE2:0) = 011), FIFO behavior changes 
according to the IG_SRC1 (31h) (IA) bit. When the IG_SRC1 (31h) (IA) bit is equal to '1' 
FIFO operates in FIFO mode, when the IG_SRC1 (31h) (IA) bit is equal to '0', FIFO 
operates in Stream mode. 
Interrupt generator 1 should be set to the desired configuration using IG_CFG1 (30h), 
IG_THS_X1 (32h), IG_THS_Y1 (33h), IG_THS_Z1 (34h).
The CTRL7 (26h) (LIR1) bit should be set to '1' in order to have latched interrupt. 
5.3.5 Bypass-to-Stream mode
In Bypass-to-Stream mode (FIFO_CTRL (2Eh) (FMODE [2:0]) = '100'), X, Y and Z 
measurement storage inside FIFO operates in Stream mode when IG_SRC1 (31h) (IA) is 
equal to '1', otherwise FIFO content is reset (Bypass mode).
Interrupt generator 1 should be set to the desired configuration using IG_CFG1 (30h), 
IG_THS_X1 (32h), IG_THS_Y1 (33h), IG_THS_Z1 (34h).
The CTRL7 (26h) (LIR1) bit should be set to '1' in order to have latched interrupt. 
5.3.6 Bypass-to-FIFO mode
In Bypass-to-FIFO mode (FIFO_CTRL (2Eh) (FMODE [2:0]) = '111', FIFO behavior changes 
according to the IG_SRC1 (31h) (IA) bit. When the IG_SRC1 (31h)(IA) bit is equal to '1', 
FIFO operates in FIFO mode, when the IG_SRC1 (31h) (IA) bit is equal to '0', FIFO 
operates in Bypass mode (FIFO content reset). If a latched interrupt is generated, FIFO 
starts collecting data until the first data in the FIFO buffer is overwritten. Interrupt generator 
1 should be set to the desired configuration using IG_CFG1 (30h), IG_THS_X1 (32h), 
IG_THS_Y1 (33h), IG_THS_Z1 (34h).
The CTRL7 (26h) (LIR1) bit should be set to '1' in order to have latched interrupt.
5.3.7  Retrieving data from FIFO
FIFO data is read through the OUT_X_L (28h) - OUT_X_H (29h), OUT_Y_L (2Ah) - 
OUT_Y_H (2Bh), OUT_Z_L (2Ch) - OUT_Z_H (2Dh) registers. A read operation by means 
of serial interface of OUT_X, OUT_Y or OUT_Z output registers provides the data stored 
into the FIFO. Each time data is read from the FIFO, the oldest X, Y and Z data are placed 
into the OUT_X, OUT_Y and OUT_Z registers and both single read and read_burst 
operations can be used. 

Digital main blocks LIS2HH12

22/47 DocID025344 Rev 5

5.3.8 FIFO multiple reads (burst)

Starting from Addr 28h multiple reads can be performed. Once the read reaches Addr 2Dh

the system automatically restarts from Addr 28h.

Figure 7. FIFO multiple reads

x,y,z OUT_Z

Read #1 (2C-2D)

(2A-2B)

OUT_Y

(28-29)

OUT_X

x,y,z

Read #n OUT_Z

(2C-2D)

(2A-2B)

OUT_Y

(28-29)

OUT_X

DocID025344 Rev 5 23/47

LIS2HH12 Digital interfaces

6 Digital interfaces

The registers embedded inside the LIS2HH12 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 to the same pins. To select/exploit the I2C interface, the

CS line must be tied high (i.e. connected to Vdd_IO).

6.1 I2C serial interface

The LIS2HH12 I2C is a bus slave. The I2C is employed to write data into registers whose

content can also be read back.

The relevant I2C terminology is given in the table below.

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 must be connected to Vdd_IO through an external pull-

up resistor. When the bus is free, both the lines are high.

The I2C interface is compliant with fast mode (400 kHz) I2C standards as well as with

normal mode.

In order to disable the I2C block, CTRL4 (23h) (I2C_DISABLE) = 1 must be set.

Table 11. Serial interface pin description

Pin name Pin description

SPI enable

I2C/SPI mode selection (1: SPI idle mode / I2C communication enabled; 0: SPI

communication mode / I2C disabled)

SCL

SPC

I2C serial clock (SCL)

SPI serial port clock (SPC)

SDA

SDI

SDO

I2C serial data (SDA)

SPI serial data input (SDI)

3-wire interface serial data output (SDO)

SA0

SDO

I2C address selection (SA0)

SPI serial data output (SDO)

Table 12. I2C terminology

Term Description

Transmitter The device which sends data to the bus

Receiver The device which receives data from the bus

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

transfer

Slave The device addressed by the master

Digital interfaces LIS2HH12

24/47 DocID025344 Rev 5

6.1.1 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 LIS2HH12 is 00111xxb where the xx bits are

modified by the SA0/SDO pin in order to modify the device address. If the SA0/SDO pin is

connected to the supply voltage, the address is 0011101b, otherwise if the SA0/SDO pin is

connected to ground, the address is 0011110b. This solution permits to connect and

address two different accelerometers to the same I2C lines.

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 I2C embedded inside the LIS2HH12 behaves like a slave device and the following

protocol must be adhered to. After the start condition (ST) a slave address is sent. Once a

slave acknowledge (SAK) has been returned, an 8-bit sub-address (SUB) is transmitted: the

7 LSb represents the actual register address while the CTRL4 (23h) (IF_ADD_INC) bit

defines the address increment.

The slave address is completed with a Read/Write bit. If the bit is ‘1’ (Read), a repeated

START (SR) condition must 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 13 explains how the

SAD+Read/Write bit pattern is composed, listing all the possible configurations.

Table 13. SAD+Read/Write patterns

Command SAD[6:2] SAD[1] = SA0 SAD[0] = SA0 R/W SAD+R/W

Write 00111 1 0 0 00111100

Write 00111 0 1 0 00111010

Table 14. Transfer when master is writing one byte to slave

Master ST SAD + W SUB DATA SP

Slave SAK SAK SAK

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LIS2HH12 Digital interfaces

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 the presented communication format MAK is Master acknowledge and NMAK is No

Master Acknowledge.

6.2 SPI bus interface

The LIS2HH12 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 8. Read and write protocol

Table 15. Transfer when master is writing multiple bytes to slave

Master ST SAD + W SUB DATA DATA SP

Slave SAK SAK SAK SAK

Table 16. 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 17. 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 DAT

ADATA

SPC

SDI

SDO

AD5 AD4 AD3 AD2 AD1 AD0

DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

AD6

Digital interfaces LIS2HH12

26/47 DocID025344 Rev 5

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 read/write bytes. 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.

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 1-7: address AD(6:0). This is the address field of the indexed register.

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

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

In multiple read/write commands additional blocks of 8 clock periods will be added. When

the CTRL4 (23h) (IF_ADD_INC) bit is ‘0’, the address used to read/write data remains the

same for every block. When the CTRL4 (23h) (IF_ADD_INC) bit is ‘1’, the address used to

read/write data is increased at every block.

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

6.2.1 SPI read

Figure 9. SPI read protocol

The SPI read command is performed with 16 clock pulses. A multiple byte read command is

performed by adding blocks of 8 clock pulses to the previous one.

bit 0: READ bit. The value is 1.

bit 1-7: address AD(6:0). 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). Additional data in multiple byte reads.

SPC

SDI

SDO

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

AD5 AD4 AD3 AD2 AD1 AD0

AD6

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LIS2HH12 Digital interfaces

Figure 10. Multiple byte SPI read protocol (2-byte example)

6.2.2 SPI write

Figure 11. SPI write protocol

The SPI write command is performed with 16 clock pulses. A multiple byte write command

is performed by adding blocks of 8 clock pulses to the previous one.

bit 0: WRITE bit. The value is 0.

bit 1 -7: address AD(6:0). This is the address field of the indexed register.

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

first).

bit 16-... : data DI(...-8). Additional data in multiple byte writes.

Figure 12. Multiple byte SPI write protocol (2-byte example)

SPC

SDI

SDO

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

AD5 AD4 AD3 AD2 AD1 AD0

DO15DO14DO13DO12DO11DO10DO9 DO8

AD6

SPC

SDI

RW DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0

AD5 AD4 AD3 AD2 AD1 AD0AD6

SPC

SDI

AD5 AD4 AD3 AD2 AD1 AD0

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

AD6

Digital interfaces LIS2HH12

28/47 DocID025344 Rev 5

6.2.3 SPI read in 3-wire mode

3-wire mode is entered by setting the CTRL4 (23h) (SIM) bit equal to ‘1’ (SPI serial interface

mode selection).

Figure 13. SPI read protocol in 3-wire mode

The SPI read command is performed with 16 clock pulses:

bit 0: READ bit. The value is 1.

bit 1-7: address AD(6:0). This is the address field of the indexed register.

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

A multiple read command is also available in 3-wire mode.

SPC

SDI/O

RW DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

AD5 AD4 AD3 AD2 AD1 AD0

AD6

DocID025344 Rev 5 29/47

LIS2HH12 Register mapping

7 Register mapping

The table given below provides a list of the 8/16 bit registers embedded in the device and

the corresponding addresses.

Table 18. Register map

Name Type

Default Comment

Hex Binary

RESERVED r 00-0A - RESERVED

TEMP_L r 0B 00001011 output

TEMP_H r 0C 00001100 output

RESERVED r 0E - RESERVED

WHO_AM_I r 0F 00001111 01000001 Who I am ID

ACT_THS r/w 1E 00011110 00000000

ACT_DUR r/w 1F 00011111 00000000

CTRL1 r/w 20 00100000 00000111

Control registers

CTRL2 r/w 21 00100001 00000000

CTRL3 r/w 22 00100010 00000000

CTRL4 r/w 23 00100011 00000100

CTRL5 r/w 24 00100100 00000000

CTRL6 r/w 25 00100101 00000000

CTRL7 r/w 26 00100110 00000000

STATUS r 27 00100111 output Status data register

OUT_X_L r 28 00101000

output Output registers

OUT_X_H r 29 00101001

OUT_Y_L r 2A 00101010

OUT_Y_H r 2B 00101011

OUT_Z_L r 2C 00101100

OUT_Z_H r 2D 00101101

FIFO_CTRL r/w 2E 00101110 00000000

FIFO registers

FIFO_SRC r 2F 00101111 output

IG_CFG1 r/w 30 00110000 00000000 Interrupt generator 1

configuration

IG_SRC1 r 31 00110001 output Interrupt generator 1

status register

IG_THS_X1 r/w 32 00110010 00000000 Interrupt generator 1

threshold X

30/47 DocID025344 Rev 5

Registers marked as Reserved must not be changed. Writing to those registers may cause

permanent damage 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.

IG_THS_Y1 r/w 33 00110011 00000000 Interrupt generator 1

threshold Y

IG_THS_Z1 r/w 34 00110100 00000000 Interrupt generator 1

threshold Z

IG_DUR1 r/w 35 00110101 00000000 Interrupt generator 1

duration

IG_CFG2 r/w 36 00110110 00000000 Interrupt generator 2

configuration

IG_SRC2 r 37 00110111 output Interrupt generator 2

status register

IG_THS2 r/w 38 00111000 00000000 Interrupt generator 2

threshold

IG_DUR2 r/w 39 00111001 00000000 Interrupt generator 2

duration

XL_

REFERENCE r/w 3A 00111010 00000000 Reference X low

XH_

REFERENCE r/w 3B 00111011 00000000 Reference X high

YL_

REFERENCE r/w 3C 00111100 00000000 Reference Y low

YH_

REFERENCE r/w 3D 00111101 00000000 Reference Y high

ZL_

REFERENCE r/w 3E 00111110 00000000 Reference Z low

ZH_

REFERENCE r/w 3F 00111111 00000000 Reference Z high

Table 18. Register map (continued)

Name Type

Default Comment

Hex Binary

DocID025344 Rev 5 31/47

LIS2HH12 Register description

8 Register description

8.1 TEMP_L (0Bh), TEMP_H (0Ch)

Temperature output register (r). The value is expressed in two’s complement.

8.2 WHO_AM_I (0Fh)

Who_AM_I register (r). This register is a read-only register. Its value is fixed at 41h.

8.3 ACT_THS (1Eh)

Activity threshold register (r/w). Its value is fixed at 0x00. Inactivity threshold.

8.4 ACT_DUR (1Fh)

Activity duration register (r/w). Its value is fixed at 0x00. Activity duration.

8.5 CTRL1 (20h)

Control register 1(r/w)

Table 22. Control register 1

Table 23. Control register 1 description

Table 19. WHO_AM_I register default values

01000001

Table 20. ACT_THS register default values

0(1)

1. This bit must be set to ‘0’ for the correct operation of the device.

THS6 THS5 THS4 THS3 THS2 THS1 THS0

Table 21. ACT_DUR register default values

DUR7 DUR6 DUR5 DUR4 DUR3 DUR2 DUR1 DUR0

HR ODR2 ODR1 ODR0 BDU ZEN YEN XEN

HR High resolution bit. Default value: 0

0: normal mode, 1: high resolution (see Table )

ODR [2:0] Output data rate & power mode selection. Default value: 000 (see Table )

BDU Block data update. Default value: 0

0: continuous update; 1:output registers not updated until MSB and LSB read)

ZEN Z-axis enable. Default value: 1 (0: Z-axis disabled; 1: Z-axis enabled)

YEN Y-axis enable. Default value: 1 (0: Y-axis disabled; 1: Y-axis enabled)

XEN X-axis enable. Default value: 1 (0: X-axis disabled; 1: X-axis enabled)

32/47 DocID025344 Rev 5

ODR [2:0] is used to set the power mode and ODR selection. The following table lists the bit

settings for power-down mode and each available frequency.

The BDU bit is used to inhibit the update of the output registers until both upper and lower

continuously. When the BDU is activated (BDU = ‘1’), the content of the output registers is

not updated until both MSB and LSB are read which avoids reading values related to

different sample times.

Table 24. ODR register setting

ODR2 ODR1 ODR0 Power-down and ODR

selection

0 0 0 Power-down

0 0 1 10 Hz

0 1 0 50 Hz

0 1 1 100 Hz

1 0 0 200 Hz

1 0 1 400 Hz

1 1 0 800 Hz

1 1 1 N.A.

Table 25. Low-pass cutoff frequency in high resolution mode (HR = 1)

HR CTRL2 (DFC [1:0]) LP cutoff freq. [Hz]

1 00 ODR/50

1 01 ODR/100

1 10 ODR/9

1 11 ODR/400

DocID025344 Rev 5 33/47

LIS2HH12 Register description

8.6 CTRL2 (21h)

Control register 2 (r/w)

Table 26. Control register 2

Table 27. Control register 2 description

0(1)

1. This bit must be set to ‘0’ for the correct operation of the device.

DFC1 DFC0 HPM1 HPM0 FDS HPIS1 HPIS2

DFC1 [1:0] High-pass filter cutoff frequency selection: the bandwidth of the high-pass filter

depends on the selected ODR and on the settings of the DFC [1:0] bits

HPM [1:0]

High-pass filter mode selection. Default value: 00

“00” or “10” = Normal mode;

“01” = Reference signal for filtering;

“11” = Not available

FDS High-pass filter data selection. Default value: 0

(0: internal filter bypassed; 1: data from internal filter sent to output register and FIFO)

HPIS1 High-pass filter enabled for interrupt generator function on Interrupt 1. Default value: 0

(0: filter bypassed; 1: filter enabled)

HPIS2 High-pass filter enabled for interrupt generator function on Interrupt 2. Default value: 0

(0: filter bypassed; 1: filter enabled)

34/47 DocID025344 Rev 5

8.7 CTRL3 (22h)

Control register 3 (r/w). INT1 control register.

Table 28. Control register 3

Table 29. Control register 3 description

8.8 CTRL4 (23h)

Control register 4 (r/w)

Table 30. Control register 4

FIFO_EN STOP_FTH INT1

_INACT

INT1

_IG2

INT1

_IG1

INT1

_OVR

INT1

_FTH

INT1

_DRDY

FIFO_EN FIFO enable. Default value 0. (0: disable; 1: enable)

STOP_FTH Enable FIFO threshold level use. Default value 0. (0: disable; 1: enable)

INT1_INACT Inactivity interrupt on INT1. Default value 0. (0: disable; 1: enable)

INT1_IG2 Interrupt generator 2 on INT1. Default value 0. (0: disable; 1: enable)

INT1_IG1 Interrupt generator 1 on INT1. Default value 0. (0: disable; 1: enable)

INT1_OVR FIFO overrun signal on INT1.

INT1_FTH FIFO threshold signal on INT1.

INT1_DRDY Data Ready signal on INT1.

BW2 BW1 FS1 FS0 BW_SCALE_ODR IF_ADD_INC I2C_DISABLE SIM

Table 31. Control register 4 description

BW [2:1] Anti-aliasing filter bandwidth. Default value: 00

(00: 400 Hz; 01: 200 Hz; 10: 100 Hz; 11: 50 Hz)

FS [1:0] Full-scale selection. Default value: 00

(00: ±2 g; 01: Not available; 10: ±4 g; 11: ±8 g)

BW_SCALE_ODR If '0', bandwidth is automatically selected as follows:

BW = 400 Hz when ODR = 800 Hz, 50 Hz, 10 Hz;

BW = 200 Hz when ODR = 400 Hz;

BW = 100 Hz when ODR = 200 Hz;

BW = 50 Hz when ODR = 100 Hz;

If '1', bandwidth is selected according to BW [2:1]

excluding ODR = 50 Hz, 10 Hz, BW = 400 Hz

IF_ADD_INC Register address automatically incremented during multiple byte access with a

serial interface (I2C or SPI). (0: disabled; 1: enabled)

I2C_DISABLE Disable I2C interface. Default value: 0 (0: I2C enabled; 1: I2C disabled)

SIM SPI serial interface mode selection. Default value: 0

0: 4-wire interface; 1: 3-wire interface

DocID025344 Rev 5 35/47

LIS2HH12 Register description

8.9 CTRL5 (24h)

Control register 5 (r/w)

Table 32. Control register 5

DEBUG SOFT_RESET DEC1 DEC0 ST2 ST1 H_LACTIVE PP_OD

Table 33. Control register 5 description

DEBUG Debug stepping action selected. Default value: 0 (0: disabled; 1: enabled)

SOFT_RESET Soft reset, it acts as POR when 1, then goes to 0

DEC [1:0] Decimation of acceleration data on OUT REG and FIFO

00 -> no decimation

01 -> update every 2 samples

10 -> update every 4 samples

11 -> update every 8 samples

ST [2:1] Self-test enable. Default value: 00

(00: Self-test disabled; Other: see table below)

H_LACTIVE Interrupt active high, low. Default value: 0

(0: active high; 1: active low)

PP_OD Push-pull/Open-drain selection on interrupt pad. Default value: 0

(0: push-pull; 1: open-drain)

Table 34. Self-test mode selection

ST2 ST1 Self-test mode

0 0 Normal mode

0 1 Positive sign self-test

1 0 Negative sign self-test

1 1 Not allowed

36/47 DocID025344 Rev 5

8.10 CTRL6 (25h)

Control register 6 (r/w)

Table 35. Control register 6

8.11 CTRL7 (26h)

Control Register 7 (r/w)

Table 37. Control register 7

BOOT 0(1)

1. This bit must be set to ‘0’ for the correct operation of the device.

INT2

_BOOT

INT2

_IG2

INT2

_IG1

INT2

_EMPTY

INT2

_FTH

INT2

_DRDY

Table 36. Control register 6 description

BOOT Force reboot, cleared as soon as the reboot is finished. Active high.

Default value 0.

INT2_BOOT BOOT interrupt on INT2. Default value: 0

(0: disable; 1: enable)

INT2_IG2 Interrupt generator 2 on INT2. Default value: 0

(0: disable; 1: enable)

INT2_IG1 Interrupt generator 1 on INT2. Default value: 0

(0: disable; 1: enable)

INT2_EMPTY FIFO empty flag on INT2. Default value: 0

INT2_FTH FIFO threshold signal on INT2. Default value: 0

INT2_DRDY Data Ready signal on INT2. Default value: 0

0(1)

1. This bit must be set to ‘0’ for the correct operation of the device.

0(1) DCRM2 DCRM1 LIR2 LIR1 4D_IG2 4D_IG1

Table 38. Control register 7 description

DCRM [2:1] DCRM is used to select the reset mode of the duration counter. Default value: 0

If DCRM = ‘0’, the counter is reset when the interrupt is no longer active, else if

DCRM = ‘1’ the duration counter is decremented. 1LSB

LIR [2:1] Latched Interrupt [2:1] Default value: 00

(0: interrupt request not latched; 1: interrupt request latched)

Cleared by reading the IG_SRC1 (31h) and IG_SRC2 (37h) registers.

4D_IG [2:1] Interrupt [2:1] 4D option enabled. Default value: 00

When set, IG_CFG1 (30h) and IG_CFG2 (36h) use 4D for position recognition.

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LIS2HH12 Register description

8.12 STATUS (27h)

Status register (r/w)

Table 39. Status register

8.13 OUT_X_L (28h) - OUT_X_H (29h)

X-axis output register (r)

8.14 OUT_Y_L (2Ah) - OUT_Y_H (2Bh)

Y-axis output register (r)

8.15 OUT_Z_L (2Ch) - OUT_Z_H (2Dh)

Z-axis output register (r)

ZYXOR ZOR YOR XOR ZYXDA ZDA YDA XDA

Table 40. Status register description

ZYXOR X-, Y- and Z-axis data overrun. Default value: 0

(0: no overrun has occurred; 1: a new set of data has overwritten the previous set)

ZOR Z-axis data overrun. Default value: 0

(0: no overrun has occurred; 1: new data for the Z-axis has overwritten the previous data)

YOR Y-axis data overrun. Default value: 0

(0: no overrun has occurred; 1: new data for the Y-axis has overwritten the

previous data)

XOR X-axis data overrun. Default value: 0

(0: no overrun has occurred; 1: new data for the X-axis has overwritten the

previous data)

ZYXDA X-, Y- and Z-axis new data available. Default value: 0

(0: a new set of data is not yet available; 1: a new set of data is available)

ZDA Z-axis new data available. Default value: 0

(0: new data for the Z-axis is not yet available; 1: new data for the Z-axis is

available)

YDA Y-axis new data available. Default value: 0

(0: new data for the Y-axis is not yet available; 1: new data for the Y-axis is available)

XDA X-axis new data available. Default value: 0

(0: new data for the X-axis is not yet available; 1: new data for the X-axis is available)

38/47 DocID025344 Rev 5

8.16 FIFO_CTRL (2Eh)

FIFO control register (r/w)

Table 41. FIFO control register

The FIFO trigger is the IG_SRC1 (31h) event. (Refer to IG_SRC1 (31h)).

8.17 FIFO_SRC (2Fh)

FIFO status control register (r)

Table 44. FIFO status register

Table 45. FIFO status register description

FMODE2 FMODE1 FMODE0 FTH4 FTH3 FTH2 FTH1 FTH0

Table 42. FIFO control register description

FMODE [2:0] FIFO mode selection bits. Default: 000. For further details refer to table below

FTH [4:0] FIFO threshold. Default: 00000. It is the FIFO depth if the STOP_FTH bit in the

CTRL3 (22h) register is set to ‘1’.

Table 43. FIFO mode selection

FMODE2 FMODE1 FMODE0 Mode

0 0 0 Bypass mode. FIFO turned off

0 0 1 FIFO mode. Stops collecting data when FIFO is full.

0 1 0 Stream mode. If the FIFO is full, the new sample overwrites

the older one

0 1 1 Stream mode until trigger is deasserted, then FIFO mode

1 0 0 Bypass mode until trigger is deasserted, then Stream mode

1 0 1 Not used

1 1 0 Not used

1 1 1 Bypass mode until trigger is deasserted, then FIFO mode

FTH OVR EMPTY FSS4 FSS3 FSS2 FSS1 FSS0

FTH FIFO threshold status.

0: FIFO filling is lower than FTH level; 1: FIFO filling is equal to or higher than

threshold level

OVR Overrun bit status. 0: FIFO is not completely filled; 1: FIFO is completely filled

EMPTY FIFO empty bit.

0: FIFO not empty; 1: FIFO empty)

FSS [4:0] FIFO stored data level

DocID025344 Rev 5 39/47

LIS2HH12 Register description

8.18 IG_CFG1 (30h)

Interrupt generator 1 configuration register (r/w)

Table 46. IG_CFG1 configuration register

Table 47. IG_CFG1 configuration register description

8.19 IG_SRC1 (31h)

Interrupt generator 1 status register (r)

Table 48. IG1_SRC1 register

Table 49. IG1_SRC1 register description

AOI 6D ZHIE ZLIE YHIE YLIE XHIE XLIE

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

6D 6-direction detection function enabled. Default value: 0

ZHIE Enable interrupt generation on Z high event or on direction recognition.

Default value: 0 (0: disable interrupt request; 1: enable interrupt request)

ZLIE Enable interrupt generation on Z low event or on direction recognition.

Default value: 0 (0: disable interrupt request; 1: enable interrupt request)

YHIE Enable interrupt generation on Y high event or on direction recognition.

Default value: 0 (0: disable interrupt request; 1: enable interrupt request)

YLIE Enable interrupt generation on Y low event or on direction recognition.

Default value: 0 (0: disable interrupt request; 1: enable interrupt request)

XHIE Enable interrupt generation on X high event or on direction recognition.

Default value: 0 (0: disable interrupt request; 1: enable interrupt request)

XLIE Enable interrupt generation on X low event or on direction recognition.

Default value: 0 (0: disable interrupt request; 1: enable interrupt request)

- IA ZHZLYHYLXHXL

IA Interrupt Active. Default value: 0 (0: no interrupt has been generated; 1: one or

more interrupt event has been generated)

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

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

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

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

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

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

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8.20 IG_THS_X1 (32h), IG_THS_Y1 (33h), IG_THS_Z1 (34h)

Interrupt generator 1 threshold registers (r/w)

Table 50. IG1_THS register

Table 51. IG1_THS description

8.21 IG_DUR1 (35h)

Interrupt generator 1 duration register (r/w)

Table 52. IG_DUR1 duration

Table 53. IG_DUR1 duration description

8.22 IG_CFG2 (36h)

Interrupt generator 2 configuration register (r/w)

Table 54. IG_CFG2 register

Table 55. IG_CFG2 register description

THS7 THS6 THS5 THS4 THS3 THS2 THS1 THS0

THS [7:0] Interrupt 1 thresholds. Default: 00000000

WAIT1 DUR1_6 DUR1_5 DUR1_4 DUR1_3 DUR1_2 DUR1_1 DUR1_0

WAIT1 Wait function enable on duration counter. Default value: 0

(0: Wait function off; 1: Wait function on)

DUR1_[6:0] Duration value Default: 0000000