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Bosch Sensortec | BMP280 Data sheet

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Document number: BST-BMP280-DS001-26 Revision_1.26_102021

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

The “config” register sets the rate, filter and interface options of the device. Writes to the “config”

Table 23: Register 0xF5 “config”

“config”

Name

Description

Bit 7, 6, 5

t_sb[2:0]

Controls inactive duration tstandby 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

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 chapter0.

Table 24: Register 0xF7 … 0xF9 “press”

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.

4.3.7

The “temp” register contains the raw temperature measurement output data ut[19:0]. For details on

how to read out the pressure and temperature information from the device, please consult chapter 0.

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