Bosch Sensortec | BMP390 Datasheet

5 | 59

Modifications reserved |Data subject to change without notice | Printed in Germany

Document number: BST-BMP390-DS002-07 Revision_1.7_032021

4.3.9.

Register 0x11 “INT_STATUS” .........................................................................................................................33

4.3.10. Register 0x12 .. 0x13 “FIFO_LENGTH”..........................................................................................................33

4.3.11. Register 0x14 “FIFO_DATA” ...........................................................................................................................34

4.3.12. Register 0x15 .. 0x16 FIFO Watermark ..........................................................................................................34

4.3.13. Register 0x17 “FIFO_CONFIG_1” ..................................................................................................................34

4.3.14. Register 0x18 “FIFO_CONFIG_2” ..................................................................................................................35

4.3.15. Register 0x19 “INT_CTRL” .............................................................................................................................35

4.3.16. Register 0x1A “IF_CONF”...............................................................................................................................36

4.3.17. Register 0x1B “PWR_CTRL” ..........................................................................................................................36

4.3.18. Register 0x1C “OSR”......................................................................................................................................37

4.3.19. Register 0x1D “ODR”......................................................................................................................................37

4.3.20. Control settings for odr_sel.............................................................................................................................38

4.3.21. Register 0x1F “CONFIG” ................................................................................................................................39

4.3.22. Register 0x30 .. 0x57 “calibration data” ..........................................................................................................39

4.3.23. Register 0x7E “CMD”......................................................................................................................................39

5. Digital interfaces............................................................................................................................................................40

5.1. Interface selection ...............................................................................................................................................40

5.2. I²C Interface..........................................................................................................................................................40

5.2.1.

I²C write ..........................................................................................................................................................41

5.2.2.

I²C read ..........................................................................................................................................................41

5.3. SPI interface.........................................................................................................................................................42

5.3.1.

SPI write .........................................................................................................................................................42

5.3.2.

SPI read .........................................................................................................................................................43

5.4. Interface parameter specification.......................................................................................................................43

5.4.1.

General interface parameters .........................................................................................................................43

5.4.2.

I²C timings ......................................................................................................................................................43

5.4.3.

SPI timings .....................................................................................................................................................45

6. Pin-out and connection diagram..................................................................................................................................46

6.1. Pin-out ..................................................................................................................................................................46

6.2. Connection diagram ¾-wire SPI .........................................................................................................................47

6.3. Connection diagram I²C ......................................................................................................................................48

7. Package, reel and environment....................................................................................................................................49

7.1. Outline dimensions .............................................................................................................................................49

7.2. Landing pattern....................................................................................................................................................49

7.3. Marking.................................................................................................................................................................50

7.3.1.

Mass production samples ...............................................................................................................................50

7.3.2.

Engineering samples ......................................................................................................................................50

7.4. Soldering guidelines ...........................................................................................................................................51

7.5. Tape and reel specification .................................................................................................................................52

7.5.1.

Dimensions.....................................................................................................................................................52

7.5.2.

Orientation within the reel ...............................................................................................................................52

7.6. Mounting and assembly recommendations ......................................................................................................52

7.7. Environmental safety ..........................................................................................................................................53

7.7.1.

RoHS..............................................................................................................................................................53

7.7.2.

Halogen content .............................................................................................................................................53

7.7.3.

Internal package structure ..............................................................................................................................53

8. Legal disclaimer.............................................................................................................................................................54

8.1. Engineering samples...........................................................................................................................................54

8.2. Product use..........................................................................................................................................................54

8.3. Application examples and hints .........................................................................................................................54

Appendix: Computation formulae reference implementation..........................................................................................55