Datasheet

BMP280 Digital Pressure Sensor

Page 25

BST-BMP280-DS001-19 | Revision 1.19 | January 2018

Bosch Sensortec

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Note: Specifications within this document are subject to change without notice. Not intended for publication.

4.3.3 Register 0xF3 “status”

The “status” register contains two bits which indicate the status of the device.

Table 19: Register 0xF3 “status”

Register 0xF3

“status”

Name

Description

Bit 3

measuring[0]

Automatically set to ‘1’ whenever a conversion is

running and back to ‘0’ when the results have been

transferred to the data registers.

Bit 0

im_update[0]

Automatically set to ‘1’ when the NVM data are being

copied to image registers and back to ‘0’ when the

copying is done. The data are copied at power-on-reset

and before every conversion.

4.3.4 Register 0xF4 “ctrl_meas”

The “ctrl_meas” register sets the data acquisition options of the device.

Table 20: Register 0xF4 “ctrl_meas”

Register 0xF4

“ctrl_meas”

Name

Description

Bit 7, 6, 5

osrs_t[2:0]

Controls oversampling of temperature data. See

chapter 3.3.2 for details.

Bit 4, 3, 2

osrs_p[2:0]

Controls oversampling of pressure data. See chapter

3.3.1 for details.

Bit 1, 0

mode[1:0]

Controls the power mode of the device. See chapter

3.6 for details.

Table 21: 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