bmp280 datasheet

Bosch
Sensortec | BMP280 Data sheet
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Modifications reserved | Data subject to change without notice
Document number: BST-BMP280-DS001-23 Revision_1.23_11202
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Table 22: register settings osrs_t
osrs_t[2:0] Temperature oversampling
000 Skipped (output set to 0x80000)
001 oversampling ×1
010 oversampling ×2
011 oversampling ×4
100 oversampling ×8
101, 110, 111 oversampling ×16
4.3.5 Register 0xF5 “config”
The “config” register sets the rate, filter and interface options of the device. Writes to the “config”
register in normal mode may be ignored. In sleep mode writes are not ignored.
Table 23: Register 0xF5 “config”
Register 0xF5
“config”
Name
Description
Bit 7, 6, 5
t_sb[2:0]
Controls inactive duration t
standby
in normal mode.
See chapter 3.6.3 for details.
Bit 4, 3, 2
filter[2:0]
Controls the time constant of the IIR filter. See
chapter 3.3.3 for details.
Bit 0
spi3w_en[0]
Enables 3-wire SPI interface when set to ‘1’. See
chapter 5.3 for details.
4.3.6 Register 0xF7…0xF9 “press” (_msb, _lsb, _xlsb)
The “press” register contains the raw pressure measurement output data up[19:0]. For details on how
to read out the pressure and temperature information from the device, please consult chapter3.9.
Table 24: Register 0xF7 … 0xF9 “press”
Register 0xF7-
0xF9 “press”
Name
Description
0xF7
press_msb[7:0]
Contains the MSB part up[19:12] of the raw pressure
measurement output data.
0xF8
press_lsb[7:0]
Contains the LSB part up[11:4] of the raw pressure
measurement output data.
0xF9 (bit 7, 6, 5, 4) press_xlsb[3:0] Contains the XLSB part up[3:0] of the raw pressure
measurement output data. Contents depend on
temperature resolution, see table 5.