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Bosch Sensortec | BMP280 Data sheet

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

selected again. This is similar to BMP180 operation. Forced mode is recommended for applications

which require low sampling rate or host-based synchronization.

time

IDDSL

IDDSB

IDDP

IDDT

POR

Mode[1:0] = 01

Data readout

osrs_t osrs_p

Write

settings

Mode[1:0] = 01

Figure 3: Forced mode timing diagram

3.6.3

Normal mode

Normal mode 16ontinuously cycles between an (active) measurement period and an

(inactive) standby period, whose time is defined by tstandby. The current in the standby period

(IDDSB) is slightly higher than in sleep mode. After setting the mode,measurement and filter

options, the last measurement results can be obtained from the data registers without the

need of further write accesses. Normal mode is recommended when using the IIR filter, and

useful for applications in which short-term disturbances (e.g. blowing into the sensor) should

be filtered.

time

IDDSL

IDDSB

IDDP

IDDT

POR

Mode[1:0] = 11

Data readout

when needed

osrs_t osrs_p

Write

settings

tstandby

Figure 4: Normal mode timing diagram

The standby time is determined by the contents of the t_sb[2:0] bits in control register 0xF5 according

to the table below:

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