Data Sheet

Bosch Sensortec | BME280 Data sheet
30 | 55
Modifications reserved | Data subject to change without notice
Document number: BST-BME280-DS002-15
Revision_1.6_092018
5.4.6 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 26: 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 Table 27 for settings and chapter 3.3.4 for
details.
Bit 4, 3, 2
filter[2:0]
Controls the time constant of the IIR filter. See Table
27 for settings and chapter 3.4.4 for details.
Bit 0
spi3w_en[0]
Enables 3-wire SPI interface when set to ‘1’. See
chapter 6.3 for details.
Table 27: t_sb settings
t_sb[2:0]
t
standby
[ms]
000
0.5
001
62.5
010
125
011
250
100
500
101
1000
110
10
111
20
Table 28: filter settings
filter[2:0]
Filter coefficient
000
Filter off
001
2
010
4
011
8
100, others
16
5.4.7 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 chapter 4.