Data Sheet

Bosch Sensortec | BME280 Data sheet
5 | 55
Modifications reserved | Data subject to change without notice
Document number: BST-BME280-DS002-15
Revision_1.6_092018
4.2 Output compensation .............................................................................................................. 23
4.2.1 Computational requirements .................................................................................. 23
4.2.2 Trimming parameter readout .................................................................................. 24
4.2.3 Compensation formulas .......................................................................................... 25
5. Global memory map and register description ............................................................................. 26
5.1 General remarks ...................................................................................................................... 26
5.2 Register compatibility to BMP280............................................................................................ 26
5.3 Memory map ............................................................................................................................ 26
5.4 Register description ................................................................................................................. 27
5.4.1 Register 0xD0 “id” ................................................................................................... 27
5.4.2 Register 0xE0 “reset” .............................................................................................. 27
5.4.3 Register 0xF2 “ctrl_hum” ........................................................................................ 27
5.4.4 Register 0xF3 “status” ............................................................................................ 28
5.4.5 Register 0xF4 “ctrl_meas” ...................................................................................... 28
5.4.6 Register 0xF5 “config” ............................................................................................ 30
5.4.7 Register 0xF7…0xF9 “press” (_msb, _lsb, _xlsb) .................................................. 30
5.4.8 Register 0xFA…0xFC “temp” (_msb, _lsb, _xlsb) .................................................. 31
5.4.9 Register 0xFD…0xFE “hum” (_msb, _lsb) ............................................................. 31
6. Digital interfaces ............................................................................................................................ 32
6.1 Interface selection ................................................................................................................... 32
6.2 I²C Interface ............................................................................................................................. 32
6.2.1 I²C write................................................................................................................... 33
6.2.2 I²C read ................................................................................................................... 33
6.3 SPI interface ............................................................................................................................ 34
6.3.1 SPI write.................................................................................................................. 34
6.3.2 SPI read .................................................................................................................. 35
6.4 Interface parameter specification ............................................................................................ 35
6.4.1 General interface parameters ................................................................................. 35
6.4.2 I²C timings ............................................................................................................... 35
6.4.3 SPI timings .............................................................................................................. 36