LPS22HH Datasheet by STMicroelectronics

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This is information on a product in full production.
February 2019 DocID030890 Rev 2 1/59
LPS22HH
High-performance MEMS nano pressure sensor:
260-1260 hPa absolute digital output barometer
Datasheet - production data
Features
260 to 1260 hPa absolute pressure range
Current consumption down to 4 μA
Absolute pressure accuracy: 0.5 hPa
Low pressure sensor noise: 0.65 Pa
High-performance TCO: 0.65 Pa/°C
Embedded temperature compensation
24-bit pressure data output
ODR from 1 Hz to 200 Hz
SPI, I²C or MIPI I3CSM interfaces
Embedded FIFO
Interrupt functions: Data-Ready, FIFO flags,
pressure thresholds
Supply voltage: 1.7 to 3.6 V
High shock survivability: 22,000 g
Small and thin package
ECOPACK® lead-free compliant
Applications
Altimeters and barometers for portable devices
GPS applications
Weather station equipment
Sport watches
e-cigarettes
Drones
Gas metering
Description
The LPS22HH is an ultra-compact piezoresistive
absolute pressure sensor which functions as a
digital output barometer. The device comprises a
sensing element and an IC interface which
communicates through I²C, MIPI I3CSM or SPI
from the sensing element to the application.
The sensing element, which detects absolute
pressure, consists of a suspended membrane
manufactured using a dedicated process
developed by ST.
The LPS22HH is available in a full-mold, holed
LGA package (HLGA). It is guaranteed to operate
over a temperature range extending from -40 °C
to +85 °C. The package is holed to allow external
pressure to reach the sensing element.
HLGA-10L
(2.0 x 2.0 x 0.73 mm)
Table 1. Device summary
Order code Temperature range [°C] Package Packing
LPS22HHTR -40 to +85°C HLGA-10L Tape and reel
www.st.com
Contents LPS22HH
2/59 DocID030890 Rev 2
Contents
1 Block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3 Communication interface characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.1 SPI - serial peripheral interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.2 I²C - inter-IC control interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.4 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Sensing element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2 IC interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 Factory calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4 Interpreting pressure readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.5 Interpreting temperature readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5 FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 Bypass mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2 FIFO mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3 Continuous (Dynamic-Stream) mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4 Bypass-to-FIFO mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.5 Bypass-to-Continuous (Dynamic-Stream) mode . . . . . . . . . . . . . . . . . . . 22
5.6 Continuous (Dynamic-Stream)-to-FIFO mode . . . . . . . . . . . . . . . . . . . . . 23
5.7 Retrieving data from FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1 Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7 Digital interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.1 Serial interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
DocID030890 Rev 2 3/59
LPS22HH Contents
59
7.2 I²C serial interface (CS = high) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.2.1 I²C operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.3 SPI bus interface (CS = low) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.3.1 SPI read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.3.2 SPI write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.3.3 SPI read in 3-wire mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.4 MIPI I3CSM slave interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.4.1 MIPI I3CSM CCC supported commands . . . . . . . . . . . . . . . . . . . . . . . . 33
7.5 I²C/MIPI I3CSM coexistence in LPS22HH . . . . . . . . . . . . . . . . . . . . . . . . 35
8 Register mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9 Register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
9.1 INTERRUPT_CFG (0Bh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
9.2 THS_P_L (0Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
9.3 THS_P_H (0Dh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
9.4 IF_CTRL (0Eh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9.5 WHO_AM_I (0Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9.6 CTRL_REG1 (10h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
9.7 CTRL_REG2 (11h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
9.8 CTRL_REG3 (12h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
9.9 FIFO_CTRL (13h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
9.10 FIFO_WTM (14h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.11 REF_P_L (15h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.12 REF_P_H (16h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.13 RPDS_L (18h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9.14 RPDS_H (19h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9.15 INT_SOURCE (24h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9.16 FIFO_STATUS1 (25h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.17 FIFO_STATUS2 (26h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.18 STATUS (27h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.19 PRESS_OUT_XL (28h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
9.20 PRESS_OUT_L (29h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
9.21 PRESS_OUT_H (2Ah) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Contents LPS22HH
4/59 DocID030890 Rev 2
9.22 TEMP_OUT_L (2Bh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.23 TEMP_OUT_H (2Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.24 FIFO_DATA_OUT_PRESS_XL (78h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.25 FIFO_DATA_OUT_PRESS_L (79h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.26 FIFO_DATA_OUT_PRESS_H (7Ah) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
9.27 FIFO_DATA_OUT_TEMP_L (7Bh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
9.28 FIFO_DATA_OUT_TEMP_H (7Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
10.1 HLGA-10L package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
10.2 HLGA-10L packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
DocID030890 Rev 2 5/59
LPS22HH List of tables
59
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 3. Pressure and temperature sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 4. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 5. DC characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 6. SPI slave timing values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 7. I²C slave timing values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 8. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 9. Serial interface pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 10. I²C terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 11. SAD+Read/Write patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 12. Transfer when master is writing one byte to slave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 13. Transfer when master is writing multiple bytes to slave . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 14. Transfer when master is receiving (reading) one byte of data from slave . . . . . . . . . . . . . 28
Table 15. Transfer when master is receiving (reading) multiple bytes of data from slave . . . . . . . . . 28
Table 16. MIPI I3CSM CCC commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 17. Registers address map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 18. Output data rate bit configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table 19. Low-pass filter configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 20. RMS noise and power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 21. Interrupt configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 22. FIFO mode selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 23. Reel dimensions for carrier tape of HLGA-10L package . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Table 24. Document revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
List of figures LPS22HH
6/59 DocID030890 Rev 2
List of figures
Figure 1. Device architecture block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 2. Digital logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3. Pin connections (bottom view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 4. SPI slave timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 5. I²C slave timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 6. Pressure readings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 7. Temperature readings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 8. Bypass mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 9. FIFO mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 10. Continuous (Dynamic-Stream) mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 11. Bypass-to-FIFO mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 12. Bypass-to-Continuous (Dynamic-Stream) mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 13. Continuous (Dynamic-Stream)-to-FIFO mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 14. LPS22HH electrical connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 15. LPS22HH power-off sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 16. Read and write protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 17. SPI read protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 18. Multiple byte SPI read protocol (2-byte example). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 19. SPI write protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 20. Multiple byte SPI write protocol (2-byte example). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 21. SPI read protocol in 3-wire mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 22. I²C and MIPI I3CSM both active (INT_DRDY pin not connected) . . . . . . . . . . . . . . . . . . . . 35
Figure 23. Only MIPI I3CSMactive (INT_DRDY pin connected to VDD_IO). . . . . . . . . . . . . . . . . . . . . 36
Figure 24. “Threshold-based” interrupt event. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 25. Interrupt events on INT_DRDY pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 26. HLGA-10L (2.0 x 2.0 x 0.73 mm typ.) package outline and mechanical dimensions . . . . . 55
Figure 27. Carrier tape information for HLGA-10L package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 28. HLGA-10L package orientation in carrier tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 29. Reel information for carrier tape of HLGA-10L package. . . . . . . . . . . . . . . . . . . . . . . . . . . 57
DocID030890 Rev 2 7/59
LPS22HH Block diagrams
59
1 Block diagrams
Figure 1. Device architecture block diagram
Figure 2. Digital logic
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Pin description LPS22HH
8/59 DocID030890 Rev 2
2 Pin description
Figure 3. Pin connections (bottom view)
Table 2. Pin description
Pin number Name Function
1 Vdd_IO Power supply for I/O pins
2SCL
SPC
I²C / MIPI I3CSM serial clock (SCL)
SPI serial port clock (SPC)
3 Reserved Connect to GND
4
SDA
SDI
SDI/SDO
I²C / MIPI I3CSM serial data (SDA)
4-wire SPI serial data input (SDI)
3-wire serial data input/output (SDI/SDO)
5SDO
SA0
4-wire SPI serial data output (SDO)
I²C least significant bit of the device address (SA0)
MIPI I3CSM least significant bit of the static address (SA0)
6CS
SPI enable
I²C and MIPI I3CSM / SPI mode selection
(1: SPI idle mode / I²C and MIPI I3CSM communication enabled;
0: SPI communication mode / I²C and MIPI I3CSM disabled)
7 INT_DRDY Interrupt or Data-Ready
8 GND 0 V supply
9 GND 0 V supply
10 VDD Power supply
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DocID030890 Rev 2 9/59
LPS22HH Mechanical and electrical specifications
59
3 Mechanical and electrical specifications
3.1 Mechanical characteristics
VDD = 1.8 V, T = 25 °C, unless otherwise noted.
Table 3. Pressure and temperature sensor characteristics
Symbol Parameter Test condition Min. Typ.(1) Max. Unit
Pressure sensor characteristics
PT
op
Operating temperature range -40 +85 °C
Pop Operating pressure range 260 1260 hPa
Pbits Pressure output data 24 bits
Psens Pressure sensitivity 4096 LSB/
hPa
PAccRel Relative accuracy over pressure(2) P = 800 - 1100 hPa
T = 25 °C ±0.025 hPa
PAccT Absolute accuracy over temperature Pop, T = -20 to 80°C ±0.5 hPa
Pnoise RMS pressure sensing noise(3) with embedded filter
and at T = 25 °C 0.0065 hPa
RMS
ODRPres Pressure output data rate(4)
1
10
25
50
75
100
200
Hz
TCO Temperature coefficient offset P = 660 ~ 1160 hPa,
T = -20 ~ +65 °C ±0.65 Pa/°C
P_longterm Pressure accuracy, long-term
stability(5) ±0.33 hPa/year
P_drift Soldering drift ±0.5 hPa
Temperature sensor characteristics
Top Operating temperature range -40 +85 °C
Tsens Temperature sensitivity 100 LSB/°C
Tacc Temperature absolute accuracy T = 0 to 80°C ±1.5 °C
ODRTOutput temperature data rate(4)
1
10
25
50
75
100
200
Hz
Mechanical and electrical specifications LPS22HH
10/59 DocID030890 Rev 2
3.2 Electrical characteristics
VDD = 1.8 V, T = 25 °C, unless otherwise noted.
1. Typical specifications are not guaranteed.
2. By design, the typ. value is defined based characterization data with 10 hPa pressure interval.
3. Pressure noise RMS evaluated in a controlled environment, based on the average standard deviation of 50 measurements
with LOW_NOISE_EN = 1, EN_LPFP = 1, LPFP_CFG = 1.
4. Output data rate is configured acting on ODR[2:0] in CTRL_REG1 (10h).
5. Typ. value is defined considering a 5-year life cycle of the final application.
Table 4. Electrical characteristics
Symbol
Parameter
Test condition Min. Typ.(1)
1. Typical specifications are not guaranteed.
Max. Unit
VDD Supply voltage 1.7 3.6
V
Vdd_IO IO supply voltage 1.7 Vdd+0.1
V
Idd Supply current
@ ODR 1 Hz
LOW_NOISE_EN = 0 4
μA
@ ODR 1 Hz
LOW_NOISE_EN = 1 12
IddPdn Supply current in
power-down mode 0.9 μA
Table 5. DC characteristics
Symbol
Parameter
Condition Min. Typ. Max. Unit
DC input characteristics
Vil Low-level input voltage
(Schmitt buffer) - - - 0.2 * Vdd_IO
V
Vih High-level input voltage
(Schmitt buffer) - 0.8 * Vdd_IO - - V
DC output characteristics
Vol Low-level output voltage - - 0.2 V
Voh High-level output voltage Vdd_IO - 0.2 - - V
DocID030890 Rev 2 11/59
LPS22HH Mechanical and electrical specifications
59
3.3 Communication interface characteristics
3.3.1 SPI - serial peripheral interface
Subject to general operating conditions for Vdd and TOP
.
Figure 4. SPI slave timing diagram
Note: Measurement points are done at 0.2·Vdd_IO and 0.8·Vdd_IO, for both ports.
Table 6. SPI slave timing values
Symbol Parameter
Val u e (1)
Unit
Min Max
tc(SPC) SPI clock cycle 100 ns
fc(SPC) SPI clock frequency 10(2) MHz
tsu(CS) CS setup time 6
ns
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.
2. Recommended to set max SPI clock 8 MHz to 50 Hz ODR.
Mechanical and electrical specifications LPS22HH
12/59 DocID030890 Rev 2
3.3.2 I²C - inter-IC control interface
Subject to general operating conditions for Vdd and TOP
.
Figure 5. 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
(1)
I²C standard mode(1) I²C fast mode
(1)
Unit
Min Max Min Max
f
(SCL)
SCL clock frequency 0 100 0 400 kHz
t
w(SCLL)
SCL clock low time 4.7 1.3
μs
t
w(SCLH)
SCL clock high time 4.0 0.6
t
su(SDA)
SDA setup time 250 100 ns
t
h(SDA)
SDA data hold time 0 3.45 0 0.9 μs
t
h(ST)
START condition hold time 4 0.6
μs
t
su(SR)
Repeated START condition
setup time 4.7 0.6
t
su(SP)
STOP condition setup time 4 0.6
t
w(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.
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DocID030890 Rev 2 13/59
LPS22HH Mechanical and electrical specifications
59
3.4 Absolute maximum ratings
Stress 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 -0.3 to Vdd_IO +0.3 V
P Overpressure 2 MPa
T
STG
Storage temperature range -40 to +125 °C
ESD Electrostatic discharge protection 2.5 (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.
Functionality LPS22HH
14/59 DocID030890 Rev 2
4 Functionality
The LPS22HH is a high-resolution, digital output pressure sensor packaged in an HLGA full-
mold package. The complete device includes a sensing element based on a piezoresistive
Wheatstone bridge approach, and an IC interface which communicates a digital signal from
the sensing element to the application.
4.1 Sensing element
An ST proprietary process is used to obtain a silicon membrane for MEMS pressure
sensors. When pressure is applied, the membrane deflection induces an imbalance in the
Wheatstone bridge piezoresistances whose output signal is converted by the IC interface.
4.2 IC interface
The complete measurement chain is composed of a low-noise amplifier which converts the
resistance unbalance of the MEMS sensors (pressure and temperature) into an analog
voltage using an analog-to-digital converter.
The pressure and temperature data may be accessed through an I²C/MIPI I3CSM/SPI
interface thus making the device particularly suitable for direct interfacing with a
microcontroller.
The LPS22HH features a Data-Ready signal which indicates when a new set of measured
pressure and temperature data are available, thus simplifying data synchronization in the
digital system that uses the device.
4.3 Factory calibration
The trimming values are stored inside the device in a non-volatile structure. When the
device is turned on, the trimming parameters are downloaded into the registers to be
employed during the normal operation which allows the device to be used without requiring
any further calibration.
PRESS_0UT_H 00111111 1 PRESS_0UT_L 1 110101 PRES$_0UT_XL 10001 1 0 1
DocID030890 Rev 2 15/59
LPS22HH Functionality
59
4.4 Interpreting pressure readings
The pressure data are stored in 3 registers: PRESS_OUT_H (2Ah), PRESS_OUT_L (29h),
and PRESS_OUT_XL (28h). The value is expressed as a 24-bit signed number (in 2’s
complement).
To obtain the pressure in hPa, take the complete 24-bit word and then divide by the
sensitivity 4096 LSB/hPa. This same interpretation is applied to pressure readings when
FIFO is enabled and the pressure data are stored in 3 registers:
FIFO_DATA_OUT_PRESS_XL (78h), FIFO_DATA_OUT_PRESS_L (79h), and
FIFO_DATA_OUT_PRESS_H (7Ah).
Figure 6. Pressure readings
Equation 1
Equation 2
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Functionality LPS22HH
16/59 DocID030890 Rev 2
4.5 Interpreting temperature readings
The temperature data are stored in 2 registers: TEMP_OUT_H (2Ch) and TEMP_OUT_L
(2Bh).
The value is expressed as 2’s complement. To obtain the temperature in °C, take the two’s
complement of the complete 16-bit word and then divide by the sensitivity 100 LSB/°C. This
same interpretation is applied to temperature readings when FIFO is enabled and the
temperature data are stored in 2 registers: FIFO_DATA_OUT_TEMP_H (7Ch) and
FIFO_DATA_OUT_TEMP_L (7Bh).
Figure 7. Temperature readings
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DocID030890 Rev 2 17/59
LPS22HH FIFO
59
5 FIFO
The LPS22HH embeds 128 slots of 40-bit data FIFO to store the pressure and temperature
output values. 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 six different modes:
Bypass mode
FIFO mode
Continuous (Dynamic-Stream) mode
Continuous (Dynamic-Stream)-to-FIFO mode
Bypass-to-Continuous (Dynamic-Stream)
Bypass-to-FIFO mode
The FIFO buffer is enabled when a configuration different from all bits '0' are written in
FIFO_CTRL (13h) and each mode is selected by the TRIG_MODES bit and F_MODE[1:0]
bits in FIFO_CTRL (13h). Programmable FIFO threshold status, FIFO overrun events and
the number of unread samples stored are available in the FIFO_STATUS1 (25h) and
FIFO_STATUS2 (26h) registers and can be set to generate dedicated interrupts on the
INT_DRDY pad using the CTRL_REG3 (12h) register.
FIFO_STATUS2 (26h)(FIFO_WTM_IA) goes to '1' when the number of unread samples
(FIFO_STATUS1 (25h)(FSS[7:0]) is greater than or equal to WTM[6:0] in FIFO_WTM
(14h). If FIFO_WTM (14h)(WTM[6:0]) is equal to 0, FIFO_STATUS2 (26h)(FIFO_WTM_IA)
stays at '0'.
FIFO_STATUS2 (26h)(FIFO_OVR_IA) is equal to '1' if a FIFO slot is overwritten.
FIFO_STATUS1 (25h)(FSS[7:0]) contains stored data levels of unread samples; when
FSS[7:0] is equal to ‘00000000’, FIFO is empty; when FSS[7:0] is equal to ‘10000000’,
FIFO is full and the unread samples are 128.
TIT
FIFO LPS22HH
18/59 DocID030890 Rev 2
5.1 Bypass mode
In Bypass mode (FIFO_CTRL (13h)(TRIG_MODES and F_MODE[1:0] = ‘000’ or ‘100’), the
FIFO is not operational and it remains empty.
Switching to Bypass mode is also used to reset the FIFO. Passing through Bypass mode is
mandatory when switching between different FIFO buffer operating modes.
As described in the next figure, for each channel only the first address is used. When new
data is available, the older data is overwritten.
Figure 8. Bypass mode
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DocID030890 Rev 2 19/59
LPS22HH FIFO
59
5.2 FIFO mode
In FIFO mode (FIFO_CTRL (13h)(TRIG_MODES and F_MODE[1:0] = ‘001’) data from the
output PRESS_OUT_XL (28h), PRESS_OUT_L (29h), PRESS_OUT_H (2Ah),
TEMP_OUT_L (2Bh), and TEMP_OUT_H (2Ch) are stored in the FIFO until it is full.
To reset FIFO content, in order to select Bypass mode the value '000' must be written in
FIFO_CTRL (13h)(TRIG_MODE & F_MODE[1:0]). After this reset command it is possible to
restart FIFO mode by writing the value '001' in FIFO_CTRL (13h)(TRIG_MODE &
F_MODE[1:0]).
The FIFO buffer memorizes 128 levels of data, but the depth of the FIFO can be
resized/reduced by setting the FIFO_CTRL (13h)(STOP_ON_WTM) bit. If the
STOP_ON_WTM bit is set to '1', FIFO depth is limited to FIFO_WTM (14h)(WTM[6:0]) data.
Figure 9. FIFO mode
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FIFO LPS22HH
20/59 DocID030890 Rev 2
5.3 Continuous (Dynamic-Stream) mode
In Continuous (Dynamic-Stream) mode (FIFO_CTRL (13h)(TRIG_MODES and
F_MODE[1:0] = ‘011’) after emptying the FIFO, the first new sample that arrives becomes
the first to be read in a subsequent read burst. In this way, the number of new data available
in FIFO does not depend on the previous read.
In Continuous (Dynamic-Stream) mode FIFO_STATUS1 (25h)(FSS[7:0]) is the number of
new pressure and temperature samples available in the FIFO buffer.
Continuous (Dynamic-Stream) is intended to be used to read FIFO_STATUS1
(25h)(FSS[7:0]) samples when it is not possible to guarantee reading data within 1/ODR
time period.
Also, a FIFO threshold interrupt on the INT_DRDY pad through CTRL_REG3
(12h)(INT_F_WTM) can be enabled in order to read data from the FIFO and leave free
memory slots for incoming data.
Figure 10. Continuous (Dynamic-Stream) mode
DocID030890 Rev 2 21/59
LPS22HH FIFO
59
5.4 Bypass-to-FIFO mode
In Bypass-to-FIFO mode (FIFO_CTRL (13h)(TRIG_MODES and F_MODE[1:0] = ‘101’),
FIFO behavior switches when the INT_SOURCE (24h)(IA) bit rises for the first time. When
the INT_SOURCE (24h)(IA) bit is equal to '0', FIFO behaves like in Bypass mode. Once the
INT_SOURCE (24h)(IA) bit rises to '1', FIFO behavior switches and keeps behaving like in
FIFO mode.
An interrupt generator has to be set to the desired configuration through INTERRUPT_CFG
(0Bh).
Figure 11. Bypass-to-FIFO mode
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FIFO LPS22HH
22/59 DocID030890 Rev 2
5.5 Bypass-to-Continuous (Dynamic-Stream) mode
In Bypass-to-Continuous (Dynamic-Stream) mode (FIFO_CTRL (13h)(TRIG_MODES and
F_MODE[1:0] = ‘110’), FIFO operates in Bypass mode until it switches to Continuous
(Dynamic-Stream) mode behavior when INT_SOURCE (24h)(IA) rises to '1', then FIFO
behavior keeps behaving like in Continuous (Dynamic-Stream) mode.
An interrupt generator has to be set to the desired configuration through INTERRUPT_CFG
(0Bh).
Figure 12. Bypass-to-Continuous (Dynamic-Stream) mode
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DocID030890 Rev 2 23/59
LPS22HH FIFO
59
5.6 Continuous (Dynamic-Stream)-to-FIFO mode
In Continuous (Dynamic-Stream)-to-FIFO mode (FIFO_CTRL (13h)(TRIG_MODES and
F_MODE[1:0] = ‘111’), data are stored in FIFO and FIFO operates in Continuous (Dynamic-
Stream) mode behavior until it switches to FIFO mode behavior when INT_SOURCE
(24h)(IA) rises to '1'.
An interrupt generator has to be set to the desired configuration through INTERRUPT_CFG
(0Bh).
Figure 13. Continuous (Dynamic-Stream)-to-FIFO mode
5.7 Retrieving data from FIFO
FIFO data is read through FIFO_DATA_OUT_PRESS (78h, 79h and 7Ah) and
FIFO_DATA_OUT_TEMP (7Bh, 7Ch).
The read address is automatically updated by the device and it rolls back to 78h when
register 7Ch is reached. In order to read all FIFO levels in a multiple byte read, 640 bytes
(5 output registers by 128 levels) must be read.
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Application hints LPS22HH
24/59 DocID030890 Rev 2
6 Application hints
Figure 14. LPS22HH electrical connections (top view)
The device power supply must be provided through the VDD line; a power supply
decoupling capacitor C1 (100 nF) must be placed as near as possible to the supply pads of
the device. The C1 capacitor can be tied to VDD and VDDIO, but it is recommended to use
2 capacitors, one on each VDD and VDDIO line, in case VDD are VDDIO are separate.
Depending on the application, an additional capacitor of 4.7 μF could be placed on VDD
line.
The functionality of the device and the measured data outputs are selectable and accessible
through the I²C, MIPI I3CSM, SPI interface. When using the I²C and MIPI I3CSM, CS must be
tied to Vdd_IO.
All the voltage and ground supplies must be present at the same time to have proper
behavior of the IC (refer to Figure 14). It is possible to remove VDD while maintaining
Vdd_IO without blocking the communication bus, in this condition the measurement chain is
powered off.
Note: To guarantee proper power-off of the device, it is recommended to maintain the duration of
the VDD line to GND for at least 10 ms.
DocID030890 Rev 2 25/59
LPS22HH Application hints
59
Figure 15. LPS22HH power-off sequence
6.1 Soldering information
The HLGA package is compliant with the ECOPACK® standard and it is qualified for
soldering heat resistance according to JEDEC J-STD-020.
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Digital interfaces LPS22HH
26/59 DocID030890 Rev 2
7 Digital interfaces
7.1 Serial interfaces
The registers embedded in the LPS22HH may be accessed through either the I²C, MIPI
I3CSM or 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 I²C interface, the
CS line must be tied high (i.e. connected to Vdd_IO).
7.2 I²C serial interface (CS = high)
The LPS22HH 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 Table 10.
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 lines have to be connected to Vdd_IO through pull-up resistors.
The I²C interface is compliant with fast mode (400 kHz) I²C standards as well as with the
normal mode.
Table 9. Serial interface pin description
Pin name Pin description
CS
SPI enable
I²C/SPI mode selection
(1: SPI idle mode / I²C communication enabled;
0: SPI communication mode / I²C disabled)
SCL/SPC C serial clock (SCL)
SPI serial port clock (SPC)
SDA
SDI
SDI/SDO
I²C serial data (SDA)
4-wire SPI serial data input (SDI)
3-wire serial data input /output (SDI/SDO)
SDO
SAO
4-wire SPI serial data output (SDO)
I²C less significant bit of the device address (SA0)
Table 10. 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
DocID030890 Rev 2 27/59
LPS22HH Digital interfaces
59
7.2.1 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
the master has transmitted this, the bus is considered busy. The next data byte 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 7-bit slave address (SAD) associated to the LPS22HH is 101110xb. The SDO/SA0 pad
can be used to modify the less significant bit of the device address. If the SA0 pad is
connected to voltage supply, LSb is ‘1’ (7-bit address 1011101b=5Dh), otherwise if the SA0
pad is connected to ground, the LSb value is ‘0’ (7-bit address 1011100b=5Ch). This
solution permits connecting and addressing two different LPS22HH devices 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 ASIC 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 has been returned (SAK), an 8-bit sub-address will be transmitted (SUB): the
7 LSB represent the actual register address while the MSB has no meaning. The
IF_ADD_INC bit in CTRL_REG2 (11h) enables sub-address auto increment (IF_ADD_INC
is '1' by default), so if IF_ADD_INC = '1' the SUB (sub-address) will be automatically
increased to allow multiple data read/write.
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 11 explains how the
SAD+read/write bit pattern is composed, listing all the possible configurations.
Table 11. SAD+Read/Write patterns
Command SAD[6:1] SAD[0] = SA0 R/W SAD+R/W
Read 101110 0 1 10111001 (B9h)
Write 101110 0 0 10111000 (B8h)
Read 101110 1 1 10111011 (BBh)
Wr i t e 1 0 111 0 1 0 1 0 111 0 1 0 ( B A h )
Table 12. Transfer when master is writing one byte to slave
Master ST SAD + W SUB DATA SP
Slave SAK SAK SAK
Digital interfaces LPS22HH
28/59 DocID030890 Rev 2
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 cannot receive another complete byte of data until it has performed
some other functions, 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 does not 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 kept 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.
Table 13. Transfer when master is writing multiple bytes to slave
Master ST SAD + W SUB DATA DATA SP
Slave SAK SAK SAK SAK
Table 14. 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 15. 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
DocID030890 Rev 2 29/59
LPS22HH Digital interfaces
59
7.3 SPI bus interface (CS = low)
The LPS22HH SPI is a bus slave. The SPI allows writing to and reading from the registers of
the device.
The serial interface interacts with the application using 4 wires: CS, SPC, SDI and SDO.
Figure 16. Read and write protocol
CS is the serial port enable and it is controlled by the SPI master. It goes low at the start of
the transmission and returns to 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
multiples of 8 in the 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 the 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 further blocks of 8 clock periods are added. When the
IF_ADD_INC bit is 0, the address used to read/write data remains the same for every block.
When the IF_ADD_INC bit 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.
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Digital interfaces LPS22HH
30/59 DocID030890 Rev 2
7.3.1 SPI read
Figure 17. SPI read protocol
The SPI read command is performed with 16 clock pulses. The 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 is read from the device (MSb first).
bit 16-...: data DO(...-8). Further data in multiple byte reads.
Figure 18. Multiple byte SPI read protocol (2-byte example)
mm
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LPS22HH Digital interfaces
59
7.3.2 SPI write
Figure 19. SPI write protocol
The SPI write command is performed with 16 clock pulses. The 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 in the device (MSb first).
bit 16-...: data DI(...-8). Further data in multiple byte writes.
Figure 20. Multiple byte SPI write protocol (2-byte
example)
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Digital interfaces LPS22HH
32/59 DocID030890 Rev 2
7.3.3 SPI read in 3-wire mode
A 3-wire mode is entered by setting bit SIM to ‘1’ (SPI serial interface mode selection) in
CTRL_REG1 (10h).
Figure 21. 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.
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DocID030890 Rev 2 33/59
LPS22HH Digital interfaces
59
7.4 MIPI I3CSM slave interface
The LPS22HH interface includes a MIPI I3CSM SDR only slave interface with MIPI I3CSM
SDR embedded features:
CCC command
Direct CCC communication (SET and GET)
Broadcast CCC communication
Private communications
Private read and write for single byte
Multiple read and write
In-band interrupt and hot-join requests
7.4.1 MIPI I3CSM CCC supported commands
The list of MIPI I3CSM CCC commands supported by the device is detailed in the following
table.
Table 16. MIPI I3CSM CCC commands
Command Command
code Default Description
ENEC 0x80 / 0x00 Slave activity control (direct and broadcast)
RSTDAA 0x86 / 0x06 Reset the assigned dynamic address
(direct and broadcast)
DISEC 0x81 / 0x01 Slave activity control (direct and broadcast)
ENTAS0 0x82 / 0x02 Enter activity state (direct and broadcast)
ENTAS1 0x83 / 0x03 Enter activity state (direct and broadcast)
ENTAS2 0x84 / 0x04 Enter activity state (direct and broadcast)
ENTAS3 0x85 / 0x05 Enter activity state (direct and broadcast)
SETMWL 0x89 / 0x08 0x00
0x08
Define maximum write length during private write
(direct and broadcast)
SETMRL 0x8A / 0x09
0x00
0x10
0x04
Define maximum read length during private read
(direct and broadcast)
SETDASA 0x87 Assign dynamic address using static address
(0x5C / 0x5D depending on the SDO level)
SETNEWDA 0x88 Change dynamic address
GETMWL 0x8B 0x00
0x08 Get maximum write length during private write
GETMRL 0x8C
0x00
0x10
0x04
Get maximum read length during private read
Digital interfaces LPS22HH
34/59 DocID030890 Rev 2
GETPID 0x8D
0x02
0x08
0x00
0xB3
0x00
0x00
Device ID register
GETBCR 0x8E 0x07 Bus characteristics register
GETDCR 0x8F 0x62 DCR
GETSTATUS 0x90 Status register
GETMXDS 0x94 0x00
0x20 Return max data speed
GETXTIME 0x99
0x07
0x04
0x0A
0x64
Get exchange time information
Table 16. MIPI I3CSM CCC commands (continued)
Command Command
code Default Description
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LPS22HH Digital interfaces
59
7.5 I²C/MIPI I3CSM coexistence in LPS22HH
In the LPS22HH, the SDA and SCL lines are common to both I²C and MIPI I3CSM. The I²C
bus requires anti-spike filters on the SDA and SCL pins that are not compatible with MIPI
I3CSM timing.
The device can be connected to both I²C and MIPI I3CSM or only to the MIPI I3CSM bus
depending on the connection of the INT1 pin when the device is powered up:
INT_DRDY pin floating (internal pull-down): I²C/MIPI I3CSM both active, see Figure 22
I²C case: INT_DRDY pin is by default an input with pull-down. If I²C is used,
INT_DRDY must be left unconnected or eventually pulled down during device
initialization. After power-on, during device configuration, the INT_DRDY pin can
be programmed as an interrupt output pin and it is recommended to set bit
I3C_disable to '1'.
I3C case: INT_DRDY pin is by default an input with pull-down. If I3C is used and
the INT_DRDY pin is unconnected, dynamic address assignment must be
performed using I²C Fast Mode Plus Timing (max 1 MHz clock). After dynamic
address assignment, I3C can be used in full speed mode.
INT_DRDY pin connected to VDD_IO: only MIPI I3CSM active, see Figure 23
Only I3C: INT_DRDY pin is by default an input with pull-down. If INT_DRDY is set
to Vdd_IO, I3C slave is selected and device can be initialized at full speed through
the SETDASA command. If the I3C bus is available for more than 10 msec and
the device is not yet addressed, a hot join request is performed (SDA line kept to
ground from slave) and the master must manage the request. After device
address assignment, a private write can be performed to disconnect the
INT_DRDY pull-down.
Figure 22. I²C and MIPI I3CSM both active (INT_DRDY pin not connected)
1. Address assignment (SETDASA) must be performed with I²C Fast Mode Plus Timing. When the slave is
addressed, the I²C slave is disabled and the timing is compatible with MIPI I3CSM specifications.
I²C/MIPI I3CSM
(both active)
Master sends
I²C r/w
I²C bus case
Slave performs
requested r/w
Master assigns DA
to the slave(1)
MIPI I3CSM bus case
MIPI I3CSM
private R/W with and without
7EhCCC commands
Slave event management
Error detection and recovery
Master resets
DA
INT_DRDY pin not connected
I²C/MIPI I3CSM both active
Digital interfaces LPS22HH
36/59 DocID030890 Rev 2
Figure 23. Only MIPI I3CSMactive (INT_DRDY pin connected to VDD_IO)
1. When the slave is MIPI I3CSM only, the I²C slave is always disabled. The address can be assigned using
MIPI I3CSM SDR timing.
I²C/MIPI I3CSM MIPI I3CSM bus case
Dynamic
Address
Assignment
Master resets
DA
MIPI I3CSM private R/W with and without
7Eh CCC commands
Slave event management
Error detection and recovery
(1)
INT_DRDY pin connected to VDD_IO
Only MIPI I3CSM active
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LPS22HH Register mapping
59
8 Register mapping
Table 17 provides a quick overview of the 8-bit registers embedded in the device.
Table 17. Registers address map
Name Type
Register address Default Function and comment
Hex Binary
Reserved 00 – 0A - Reserved
INTERRUPT_CFG R/W 0B 00000000 Interrupt register
THS_P_L R/W 0C 00000000
Pressure threshold registers
THS_P_H R/W 0D 00000000
IF_CTRL R/W 0E 00000000 Interface control register
WHO_AM_I R 0F 10110011 Who am I
CTRL_REG1 R/W 10 00000000
Control registersCTRL_REG2 R/W 11 00010000
CTRL_REG3 R/W 12 00000000
FIFO_CTRL R/W 13 00000000 FIFO configuration register
FIFO_WTM R/W 14 00000000
REF_P_L R 15 00000000
Reference pressure registers
REF_P_H R 16 00000000
Reserved 17 - Reserved
RPDS_L R/W 18 00000000
Pressure offset registers
RPDS_H R/W 19 00000000
Reserved 1A-23 - Reserved
INT_SOURCE R 24 Output Interrupt register
FIFO_STATUS1 R 25 Output
FIFO status registers
FIFO_STATUS2 R 26 Output
STATUS R 27 Output Status register
PRESSURE_OUT_XL R 28 Output
Pressure output registersPRESSURE_OUT_L R 29 Output
PRESSURE_OUT_H R 2A Output
TEMP_OUT_L R 2B Output
Temperature output registers
TEMP_OUT_H R 2C Output
Reserved 2D - 77 - Reserved
FIFO_DATA_OUT_PRESS_XL R 78 Output
FIFO pressure output registersFIFO_DATA_OUT_PRESS_L R 79 Output
FIFO_DATA_OUT_PRESS_H R 7A Output
Register mapping LPS22HH
38/59 DocID030890 Rev 2
Registers marked as Reserved must not be changed. Writing to those registers may cause
permanent damage to the device.
To guarantee the proper behavior of the device, all register addresses not listed in the above
table must not be accessed and the content stored in those registers must not be changed.
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.
FIFO_DATA_OUT_TEMP_L R 7B Output
FIFO temperature output registers
FIFO_DATA_OUT_TEMP_H R 7C Output
Table 17. Registers address map (continued)
Name Type
Register address Default Function and comment
Hex Binary
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LPS22HH Register description
59
9 Register description
The device contains a set of registers which are used to control its behavior and to retrieve
pressure and temperature data. The register address, made up of 7 bits, is used to identify
them and to read/write the data through the serial interface.
9.1 INTERRUPT_CFG (0Bh)
Interrupt mode for pressure acquisition configuration (R/W)
Referring to Figure 24: “Threshold-based” interrupt event, the LPS22HH can be set by the
user to support the interrupt function when P_DIFF_IN (defined below) is higher or lower
than the threshold value stored in THS_P_L (0Ch) and THS_P_H (0Dh).
It is enabled when the DIFF_EN bit in INTERRUPT_CFG (0Bh) register is set to '1' and
either PHE bit or PLE bit (or both bits) = '1'. Then, the differential pressure can be compared
to a user-defined threshold stored in the 15-bit THS_P (0Ch and 0Dh) registers.
The threshold pressure value defined by the user is a 15-bit unsigned value in a 16-bit
register composed of THS_P_L (0Ch) and THS_P_H (0Dh) The value is:
THS_P (15-bit unsigned) = Desired Interrupt threshold (hPa) x 16
The PHE and PLE bits in INTERRUPT_CFG (0Bh) enable the differential pressure interrupt
generation on the positive or negative event respectively.
The differential interrupt must be used with AUTOREFP or AUTOZERO mode. Please refer
to the application note (AN5209: Section 8. Interrupt modes) for further details.
76543210
AUTOREFP RESET_ARP AUTOZERO RESET_AZ DIFF_EN LIR PLE PHE
AUTOREFP Enable AUTOREFP function. Default value: 0
(0: normal mode; 1: AUTOREFP enabled)
RESET_ARP Reset AUTOREFP function. Default value: 0
(0: normal mode; 1: reset AUTOREFP function)
AUTOZERO Enable AUTOZERO function. Default value: 0
(0: normal mode; 1: AUTOZERO enabled)
RESET_AZ Reset AUTOZERO function. Default value: 0
(0: normal mode; 1: reset AUTOZERO function)
DIFF_EN Enable interrupt generation. Default value: 0
(0: interrupt generation disabled; 1: interrupt generation enabled)
LIR Latch interrupt request to the INT_SOURCE (24h) register. Default value: 0
(0: interrupt request not latched; 1: interrupt request latched)
PLE Enable interrupt generation on pressure low event. Default value: 0
(0: disable interrupt request;
1: enable interrupt request on pressure value lower than preset threshold)
PHE Enable interrupt generation on pressure high event. Default value: 0
(0: disable interrupt request;
1: enable interrupt request on pressure value higher than preset threshold)
«»
Register description LPS22HH
40/59 DocID030890 Rev 2
Figure 24. “Threshold-based” interrupt event
To enable the AUTOZERO mode, the AUTOZERO bit must be set to '1' and then the
measured pressure value is used as the reference and stored in the register REF_P
(REF_P_L (15h), REF_P_H (16h)). From this point on, the output pressure value
(PRESS_OUT_XL (28h), PRESS_OUT_L (29h), PRESS_OUT_H (2Ah)) is updated with
the difference between the measured pressure and REF_P.
P_DIFF_IN = measured pressure - REF_P
PRESS_OUT = measured pressure - REF_P
After the first conversion, the AUTOZERO bit is automatically set back to '0'. In order to
return back to normal mode, the RESET_AZ bit in the INTERRUPT_CFG (0Bh) register has
to be set to '1'. This also resets the content of the REF_P registers to 0.
AUTOREFP mode allows using the pressure differential for the generation of the interrupt
keeping the output pressure registers PRESS_OUT (PRESS_OUT_XL (28h),
PRESS_OUT_L (29h), PRESS_OUT_H (2Ah)) without comparing REF_P. If the
AUTOREFP bit is set to '1', the measured output pressure is used as the reference in the
register REF_P (REF_P_L (15h), REF_P_H (16h)) for interrupt generation with following:
P_DIFF_IN = measured pressure - REF_P
The output registers PRESS_OUT (28h, 29h and 2Ah) are not changed by REF_P and
shows as follows.
PRESS_OUT = measured pressure
After the first conversion, the AUTOREFP bit is automatically set to '0'. In order to return
back to normal mode, the RESET_ARP bit has to be set to '1'
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DocID030890 Rev 2 41/59
LPS22HH Register description
59
9.2 THS_P_L (0Ch)
User-defined threshold value for pressure interrupt event (Least significant bits) (R/W)
The threshold value for pressure interrupt generation is a 15-bit unsigned right-justified
value composed of THS_P_H (0Dh) and THS_P_L (0Ch).The value is expressed as:
THS_P (15-bit unsigned) = Desired interrupt threshold (hPa) x 16
To enable the interrupt event based on this user-defined threshold, the DIFF_EN bit in
INTERRUPT_CFG (0Bh) must be set to '1', the PHE bit or PLE bit (or both bits) in
INTERRUPT_CFG (0Bh) has to be enabled.
9.3 THS_P_H (0Dh)
User-defined threshold value for pressure interrupt event (Most significant bits) (R/W)
76543210
THS7 THS6 THS5 THS4 THS3 THS2 THS1 THS0
THS[7:0] This register contains the low part of threshold value for pressure interrupt generation.
Default value: 00h
76543210
- THS14 THS13 THS12 THS11 THS10 THS9 THS8
THS[14:8]
This register contains the high part of threshold value for pressure interrupt generation.
Refer to THS_P_L (0Ch).
Default value: 00h
Register description LPS22HH
42/59 DocID030890 Rev 2
9.4 IF_CTRL (0Eh)
Interface control register (R/W)
9.5 WHO_AM_I (0Fh)
Device Who am I
76543210
INT_EN_I3C 00 SDA_PU_EN SDO_PU_EN PD_DIS_INT1 I3C_DISABLE I2C_DISABLE
INT_EN_I3C
Enable INT1 pad with MIPI I3CSM. If the INT_EN_I3C bit is set, the INT1 pad is
polarized as OUT. Default value: 0
(0: INT1 disabled with MIPI I3CSM; 1: INT1 enabled with MIPI I3CSM)
SDA_PU_EN Enable pull-up on the SDA pin. Default value: 0
(0: SDA pin pull-up disconnected; 1: SDA pin with pull-up)
SDO_PU_EN Enable pull-up on the SDO pin. Default value: 0
(0: SDO pin pull-up disconnected; 1: SDO pin with pull-up)
PD_DIS_INT1 Disable pull down on the INT1 pin. Default value: 0
(0: INT1 pin with pull-down; 1: INT1 pin pull-down disconnected)
I3C_DISABLE(1)
1. I3C_DISABLE bit disables the MIPI I3CSM communication protocol.
Disable MIPI I3CSM interface. Default value: 0
(0: MIPI I3CSM enabled; 1: MIPI I3CSM disabled)
I2C_DISABLE(2)
2. I2C_DISABLE bit disables the I²C interface, by default both SPI and I²C interfaces are enabled.
Disable I²C interface. Default value: 0
(0: I²C enabled; 1: I²C disabled)
76543210
10110011
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LPS22HH Register description
59
9.6 CTRL_REG1 (10h)
Control register 1 (R/W)
When the ODR bits are set to '000', the device is in Power-down mode. When the device is
in power-down mode, almost all internal blocks of the device are switched off to minimize
power consumption. The I²C interface is still active to allow communication with the device.
The content of the configuration registers is preserved and output data registers are not
updated, therefore keeping the last data sampled in memory before going into power-down
mode.
If the ONE_SHOT bit in CTRL_REG2 (11h) is set to '1', One-shot mode is triggered and a
new acquisition starts when it is required. Enabling this mode is possible only if the device
was previously in power-down mode (ODR bits set to '000'). Once the acquisition is
completed and the output registers updated, the device automatically enters in power-down
mode. ONE_SHOT bit self-clears itself.
76543210
0 ODR2 ODR1 ODR0 EN_LPFP LPFP_CFG BDU SIM
ODR[2:0] Output data rate selection. Default value: 000
Refer to Table 18.
EN_LPFP Enable low-pass filter on pressure data when Continuous mode is used.
Default value: 0
(0: Low-pass filter disabled; 1: Low-pass filter enabled)
LPFP_CFG LPFP_CFG: Low-pass configuration register. Default value: 0
Refer to Table 19.
BDU(1)
1. To guarantee the correct behavior of BDU feature, PRESS_OUT_H (2Ah) must be the last address read.
Block data update. Default value: 0
(0: continuous update;
1: output registers not updated until MSB and LSB have been read)
SIM SPI Serial Interface Mode selection. Default value: 0
(0: 4-wire interface; 1: 3-wire interface)
Table 18. Output data rate bit configurations
ODR[2:0] Temperature, Pressure
000 One-shot
001 1 Hz
010 10 Hz
011 25 Hz
100 50 Hz
101 75 Hz
110(1)
1. This option disables the low-noise mode automatically.
100 Hz
111(1) 200 Hz
Register description LPS22HH
44/59 DocID030890 Rev 2
When the ODR bits are set to a value different than '000', the device is in Continuous
mode and automatically acquires a set of data (pressure and temperature) at the frequency
selected through the ODR[2:0] bits.
Once the additional low-pass filter has been enabled through the EN_LPFP bit, it is possible
to configure the device bandwidth acting on the LPFP_CFG bit. See Table 19 for low-pass
filter configurations.
The BDU bit is used to inhibit the update of the output registers until both upper and lower
(and XLOW) register parts are read. In default mode (BDU = ‘0’) the output register values
are updated continuously. If for any reason it is not sure to read faster than the output data
rate, it is recommended to set the BDU bit to ‘1’. In this way, the content of the output
registers is not updated until MSB, LSB and XLSB have been read which avoids reading
values related to different sample times.
Table 19. Low-pass filter configurations
EN_LPFP LPFP_CFG Additional low-pass filter status Device bandwidth
0 x Disabled ODR/2
1 0 Enabled ODR/9
1 1 Enabled ODR/20
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LPS22HH Register description
59
9.7 CTRL_REG2 (11h)
Control register 2 (R/W)
The BOOT bit is used to refresh the content of the internal registers stored in the Flash
memory block. At device power-up, the content of the Flash memory block is transferred to
the internal registers related to the trimming functions to allow correct behavior of the device
itself. If for any reason the content of the trimming registers is modified, it is sufficient to use
this bit to restore the correct values. When the BOOT bit is set to '1', the content of the
internal Flash is copied into the corresponding internal registers and is used to calibrate the
device. These values are factory trimmed and they are different for every device. They allow
the correct behavior of the device and normally they should not be changed. At the end of
the boot process, the BOOT bit is set again to '0' by hardware. The BOOT bit takes effect
immediately after it is set to 1.
INT_H_L selects an interrupt active-high/low value.
PP_OD selects push-pull/open-drain on the interrupt pad.
The IF_ADD_INC bit enables the address to be automatically incremented during a multiple
byte access with a serial interface (SPI or I²C).
The SWRESET bit resets the volatile registers to default value ‘0’. It returns to ‘0’ by
hardware.
76 5 4 3 2 1 0
BOOT INT_H_L PP_OD IF_ADD_INC 0 SWRESET LOW_NOISE_EN ONE_SHOT
BOOT Reboots memory content. Default value: 0
(0: normal mode; 1: reboot memory content)
INT_H_L Interrupt active-high, active-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)
IF_ADD_INC Register address automatically incremented during a multiple byte access with a
serial interface (I²C or SPI). Default value: 1
(0: disable; 1: enable)
SWRESET Software reset. Default value: 0
(0: normal mode; 1: software reset).
The bit is self-cleared when the reset is completed.
LOW_NOISE_EN Enables low noise (used only if ODR is lower than 100 Hz). Default value: 0
(0: low-current mode; 1: low-noise mode)
ONE_SHOT Enables one-shot. Default value: 0
(0: idle mode; 1: a new dataset is acquired)
Register description LPS22HH
46/59 DocID030890 Rev 2
LOW_NOISE_EN is disabled by default and must be changed when the device is in power-
down mode. It enables low-noise mode but can be used when the ODR is lower than
100 Hz. If ODR = 100 Hz or ODR = 200 Hz, this option is automatically switched off and the
value of the low-noise enable bit is ignored.
LOW_NOISE_EN mode is enabled to have less RMS noise and the best performance is
achieved with LOW_NOISE_EN set to 1 and filter at ODR/20. Depending on the application,
the LOW_NOISE_EN bit can be enabled (low-noise mode) or disabled (low-current mode)
to have less RMS noise or less power consumption (refer to the following table).
The ONE_SHOT bit is used to start a new conversion when the ODR[2:0] bits in
CTRL_REG1 (10h) are set to '000'. Writing a '1' in ONE_SHOT triggers a single
measurement of pressure and temperature. Once the measurement is done, the
ONE_SHOT bit will self-clear, the new data are available in the output registers, and the
STATUS (27h) bits are updated.
Table 20. RMS noise and power consumption
Mode Additional low-pass
filter status Device bandwidth RMS noise [Pa] Supply current
@ ODR = 1 Hz [μA]
Low noise
Disabled 1.7 12
Enabled ODR/9 0.9 12
Enabled ODR/20 0.65 12
Low current
Disabled 4.5 4
Enabled ODR/9 2.6 4
Enabled ODR/20 1.7 4
DRDV |NT7F7WTM INLEOVR INTiFiFULL [Ell
DocID030890 Rev 2 47/59
LPS22HH Register description
59
9.8 CTRL_REG3 (12h)
Control register 3 - INT_DRDY pin control register (R/W)
Figure 25. Interrupt events on INT_DRDY pin
76543210
0 0 INT_F_FULL INT_F_WTM INT_F_OVR DRDY INT_S1 INT_S0
INT_F_FULL FIFO full flag on INT_DRDY pin. Default value: 0
(0: FIFO empty; 1: FIFO full - 128 unread samples)
INT_F_WTM FIFO threshold (watermark) status on INT_DRDY pin. Default value: 0
(0: FIFO is lower than FTH level; 1: FIFO is equal to or higher than FTH level)
INT_F_OVR FIFO overrun status on INT_DRDY pin. Default value: 0
(0: not overwritten; 1: at least one sample in the FIFO has been overwritten)
DRDY Data-ready signal on INT_DRDY pin. Default value: 0
(0: disable; 1: enable)
INT_S[1:0] Data signal on INT_DRDY pin control bits. Default value: 00
Refer to Table 21.
Table 21. Interrupt configurations
INT_S1 INT_S0 INT_DRDY pin configuration
00
Data signal (in order of priority: DRDY or INT_F_WTM or INT_F_OVR or
INT_F_FULL)
0 1 Pressure high (P_high)
1 0 Pressure low (P_low)
1 1 Pressure low OR high
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Register description LPS22HH
48/59 DocID030890 Rev 2
9.9 FIFO_CTRL (13h)
FIFO control register (R/W)
The STOP_ON_WTM bit enables the use of the FIFO watermark level: when the number of
samples in FIFO is equal to the watermark level (set using the WTM[4:0] bits in FIFO_WTM
(14h)) then FIFO is full.
The TRIG_MODES bit enables the triggered FIFO modes.
The F_MODE[1:0] bits select one of the FIFO modes, as described in Table 22.
Output data (pressure and temperature) are read through FIFO_DATA_OUT_PRESS_XL
(78h), FIFO_DATA_OUT_PRESS_L (79h), FIFO_DATA_OUT_PRESS_H (7Ah),
FIFO_DATA_OUT_TEMP_L (7Bh) and FIFO_DATA_OUT_TEMP_H (7Ch); both single
read and multiple read operations can be used.
7654 3 2 1 0
0 0 0 0 STOP_ON_WTM TRIG_MODES F_MODE1 F_MODE0
STOP_ON_WTM Stop-on-FIFO watermark. Enables FIFO watermark level use. Default value: 0
(0: disable; 1: enable)
TRIG_MODES Enables triggered FIFO modes. Default value: 0
F_MODE[1:0] Selects triggered FIFO modes. Default value: 00
Refer to Table 22.
Table 22. FIFO mode selection
TRIG_MODES F_MODE[1:] Mode
x00
Bypass
001
FIFO mode
01x
Continuous (Dynamic-Stream)
101
Bypass-to-FIFO
110
Bypass-to-Continuous (Dynamic-Stream)
111
Continuous (Dynamic-Stream)-to-FIFO
DocID030890 Rev 2 49/59
LPS22HH Register description
59
9.10 FIFO_WTM (14h)
FIFO threshold setting register (R/W)
9.11 REF_P_L (15h)
Reference pressure LSB data (R)
The Reference pressure value is 16-bit data and it is composed of REF_P_H (16h) and
REF_P_L (15h). The value is expressed as 2’s complement.
The reference pressure value is stored and used when the AUTOZERO or AUTOREFP
function is enabled. Please refer to the INTERRUPT_CFG (0Bh) register description.
9.12 REF_P_H (16h)
Reference pressure MSB data (R)
7654 3 2 1 0
0 WTM6 WTM5 WTM4 WTM3 WTM2 WTM1 WTM0
WTM[6:0] FIFO threshold. Watermark level setting. Default value: 0000000
76543210
REFL7 REFL6 REFL5 REFL4 REFL3 REFL2 REFL1 REFL0
REFL[7:0] This register contains the low part of the reference pressure value.
Default value: 00000000
76543210
REFL15 REFL14 REFL13 REFL12 REFL11 REFL10 REFL9 REFL8
REFL[15:8] This register contains the high part of the reference pressure value.
Default value: 00000000
Register description LPS22HH
50/59 DocID030890 Rev 2
9.13 RPDS_L (18h)
Pressure offset (LSB data)
The pressure offset value is 16-bit data that can be used to implement one-point calibration
(OPC) after soldering. This value is composed of RPDS_H (19h) and RPDS_L (18h). The
value is expressed as 2’s complement.
9.14 RPDS_H (19h)
Pressure offset (MSB data)
9.15 INT_SOURCE (24h)
Interrupt source (read only)
76543210
RPDS7 RPDS6 RPDS5 RPDS4 RPDS3 RPDS2 RPDS1 RPDS0
RPDS[7:0] This register contains the low part of the pressure offset value.
Default value: 00000000
76543210
RPDS15 RPDS14 RPDS13 RPDS12 RPDS11 RPDS10 RPDS9 RPDS8
RPDS[15:8] This register contains the high part of the pressure offset value.
Refer to RPDS_L (18h). Default value: 00000000
7 6543210
BOOT_ON 0000IAPLPH
BOOT_ON Indication of Boot phase.
(0: Boot phase has ended;
1: Boot phase is running).
IA Interrupt active.
(0: no interrupt has been generated;
1: one or more interrupt events have been generated).
PL Differential pressure Low.
(0: no interrupt has been generated;
1: low differential pressure event has occurred).
PH Differential pressure High.
(0: no interrupt has been generated;
1: high differential pressure event has occurred).
DocID030890 Rev 2 51/59
LPS22HH Register description
59
9.16 FIFO_STATUS1 (25h)
FIFO status register (read only)
9.17 FIFO_STATUS2 (26h)
FIFO status register (read only)
9.18 STATUS (27h)
Status register (read only)
This register is updated every ODR cycle.
76543210
FSS7 FSS6 FSS5 FSS4 FSS3 FSS2 FSS1 FSS0
FSS[7:0] FIFO stored data level, number of unread samples stored in FIFO.
(00000000: FIFO empty; 10000000: FIFO full, 128 unread samples)
7 6 5 43210
FIFO_WTM_IA FIFO_OVR_IA FIFO_FULL_IA - ----
FIFO_WTM_IA FIFO threshold (watermark) status. Default value: 0
(0: FIFO filling is lower than treshold level;
1: FIFO filling is equal or higher than treshold level).
FIFO_OVR_IA FIFO overrun status. Default value: 0
(0: FIFO is not completely full;
1: FIFO is full and at least one sample in the FIFO has been overwritten).
FIFO_FULL_IA FIFO full status. Default value: 0
(0: FIFO is not completely filled;
1: FIFO is completely filled, no samples overwritten)
76543210
-- -- T_OR P_OR -- -- T_DA P_DA
T_OR Temperature data overrun.
(0: no overrun has occurred;
1: a new data for temperature has overwritten the previous data)
P_OR Pressure data overrun.
(0: no overrun has occurred;
1: new data for pressure has overwritten the previous data)
T_DA Temperature data available.
(0: new data for temperature is not yet available;
1: a new temperature data is generated)
P_DA Pressure data available.
(0: new data for pressure is not yet available;
1: a new pressure data is generated)
Register description LPS22HH
52/59 DocID030890 Rev 2
9.19 PRESS_OUT_XL (28h)
Pressure output value LSB data (read only)
The pressure output value is a 24-bit data that contains the measured pressure. It is
composed of PRESS_OUT_H (2Ah), PRESS_OUT_L (29h) and PRESS_OUT_XL (28h).
The value is expressed as 2’s complement.
The output pressure register PRESS_OUT is provided as the difference between the
measured pressure and the content of the register RPDS (18h, 19h)*.
Please refer to Section 4.4: Interpreting pressure readings for additional info.
*DIFF_EN = '0', AUTOZERO = '0', AUTOREFP = '0'
9.20 PRESS_OUT_L (29h)
Pressure output value middle data (read only)
9.21 PRESS_OUT_H (2Ah)
Pressure output value MSB data (read only)
76543210
POUT7 POUT6 POUT5 POUT4 POUT3 POUT2 POUT1 POUT0
POUT[7:0] This register contains the low part of the pressure output value.
76543210
POUT15 POUT14 POUT13 POUT12 POUT11 POUT10 POUT9 POUT8
POUT[15:8] This register contains the mid part of the pressure output value.
Refer to PRESS_OUT_XL (28h)
76543210
POUT23 POUT22 POUT21 POUT20 POUT19 POUT18 POUT17 POUT16
POUT[23:16] This register contains the high part of the pressure output value.
Refer to PRESS_OUT_XL (28h)
DocID030890 Rev 2 53/59
LPS22HH Register description
59
9.22 TEMP_OUT_L (2Bh)
Temperature output value LSB data (read only)
The temperature output value is 16-bit data that contains the measured temperature. It is
composed of TEMP_OUT_H (2Ch), and TEMP_OUT_L (2Bh). The value is expressed as
2’s complement.
9.23 TEMP_OUT_H (2Ch)
Temperature output value MSB data (read only)
9.24 FIFO_DATA_OUT_PRESS_XL (78h)
FIFO pressure output LSB data (read only)
9.25 FIFO_DATA_OUT_PRESS_L (79h)
FIFO pressure output middle data (read only)
76543210
TOUT7 TOUT6 TOUT5 TOUT4 TOUT3 TOUT2 TOUT1 TOUT0
TOUT[7:0] This register contains the low part of the temperature output value.
76543210
TOUT15 TOUT14 TOUT13 TOUT12 TOUT11 TOUT10 TOUT9 TOUT8
TOUT[15:8] This register contains the high part of the temperature output value.
76543210
FIFO_P7 FIFO_P6 FIFO_P5 FIFO_P4 FIFO_P3 FIFO_P2 FIFO_P1 FIFO_P0
FIFO_P[7:0] Pressure LSB data in FIFO buffer
76543210
FIFO_P15 FIFO_P14 FIFO_P13 FIFO_P12 FIFO_P11 FIFO_P10 FIFO_P9 FIFO_P8
FIFO_P[15:8] Pressure middle data in FIFO buffer
Register description LPS22HH
54/59 DocID030890 Rev 2
9.26 FIFO_DATA_OUT_PRESS_H (7Ah)
FIFO pressure output MSB data (read only)
9.27 FIFO_DATA_OUT_TEMP_L (7Bh)
FIFO temperature output LSB data (read only)
9.28 FIFO_DATA_OUT_TEMP_H (7Ch)
FIFO temperature output MSB data (read only)
76543210
FIFO_P23 FIFO_P22 FIFO_P21 FIFO_P20 FIFO_P19 FIFO_P18 FIFO_P17 FIFO_P16
FIFO_P[23:16] Pressure middle data in FIFO buffer
76543210
FIFO_T7 FIFO_T6 FIFO_T5 FIFO_T4 FIFO_T3 FIFO_T2 FIFO_T1 FIFO_T0
FIFO_T[7:0] Temperature LSB data in FIFO buffer
76543210
FIFO_T15 FIFO_T14 FIFO_T13 FIFO_T12 FIFO_T11 FIFO_T10 FIFO_T9 FIFO_T8
FIFO_T[15:8] Temperature MSB data in FIFO buffer
+H OUTER DIMENSIONS — Lengm [L] 2 :0 1 Wm [W] 2 Hewgm [H] a s max
DocID030890 Rev 2 55/59
LPS22HH Package information
59
10 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
10.1 HLGA-10L package information
Figure 26. HLGA-10L (2.0 x 2.0 x 0.73 mm typ.) package outline
and mechanical dimensions
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Package information LPS22HH
56/59 DocID030890 Rev 2
10.2 HLGA-10L packing information
Figure 27. Carrier tape information for HLGA-10L package
Figure 28. HLGA-10L package orientation in carrier tape
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DocID030890 Rev 2 57/59
LPS22HH Package information
59
Figure 29. Reel information for carrier tape of HLGA-10L package
Table 23. Reel dimensions for carrier tape of HLGA-10L package
Reel dimensions (mm)
A (max) 330
B (min) 1.5
C 13 ±0.25
D (min) 20.2
N (min) 60
G 12.4 +2/-0
T (max) 18.4
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Revision history LPS22HH
58/59 DocID030890 Rev 2
11 Revision history
Table 24. Document revision history
Date Revision Changes
22-Aug-2018 1 Initial release
04-Feb-2019 2
Updated description of SETDASA in Table 16: MIPI I3CSM CCC
commands
Updated text concerning BOOT bit in CTRL_REG2 (11h)
Updated bit 7 in INT_SOURCE (24h)
Updated Figure 27: Carrier tape information for HLGA-10L package
DocID030890 Rev 2 59/59
LPS22HH
59
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