Data Sheet

Final Datasheet
BME280 Environmental sensor
Page 27
BST-BME280-DS001-10 | Revision 1.1 | May 2015 Bosch Sensortec
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to
third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
Table 22: Register 0xF4 “ctrl_meas”
Register 0xF4
“ctrl_meas”
Name
Description
Bit 7, 6, 5
osrs_t[2:0]
Controls oversampling of temperature data. See
Table 24 for settings and chapter 3.4.3 for details.
Bit 4, 3, 2
osrs_p[2:0]
Controls oversampling of pressure data. See Table 23
for settings and chapter 3.4.2 for details.
Bit 1, 0
mode[1:0]
Controls the sensor mode of the device. See Table 25
for settings and chapter 3.3 for details.
Table 23: register settings osrs_p
osrs_p[2:0]
Pressure oversampling
000
Skipped (output set to 0x80000)
001
oversampling ×1
010
oversampling ×2
011
oversampling ×4
100
oversampling ×8
101, others
oversampling ×16
Table 24: 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, others
oversampling ×16
Table 25: register settings mode
mode[1:0]
Mode
00
Sleep mode
01 and 10
Forced mode
11
Normal mode
5.4.6 Register 0xF5 “config”
The “config” register sets the rate, filter and interface options of the device. 
register in normal mode may be ignored. In sleep mode writes are not ignored.