BMP585 datasheet(19/71 Pages) BOSCH

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Bosch Sensortec

| BST-BMP585-DS003-02

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Document number: BST-BMP585-DS003-02

as well as in the event of applications for industrial property rights

4.3.5 Low Power NORMAL mode

If the conditions for deep standby apply, as described in section 4.3.1 above, then NORMAL mode will automatically

apply DEEP_STANDY phase in between the measurements. This reduces power consumption even further. If one of

these settings is changed, the BMP585 transitions back to NORMAL mode.

4.3.6 CONTINOUS mode

Continuous mode performs pressure measurements similar to NORMAL mode. However, the ODR setting is ignored.

Sampling is performed with the maximum frequency that is possible with the selected oversampling settings.

CONTINOUS mode stays in the (active) measurement period and does not cycle to a standby period. The resulting ODR

is not necessarily a value that is selectable via the ODR register. The resulting ODRs for the recommended OSR settings

are shown in Table 9.

4.3.7 Mode transitions

To go in STANDBY status the user must write ODR_CONFIG.pwr_mode = 0b00. The maximum transition time to

STANDBY is tstandby. The effective status of the device is always observable reading back the same register. After a

commanded switch to standby, the user either needs to wait for tstandby or check the status register for a successful

switch, before he can command the device to go to another mode, and before writing to any of the registers named in

section 4.3.8 Mode-depending register write restrictions.

From STANDBY, it can be switched to CONTINUOS, FORCED or NORMAL mode by writing ODR_CONFIG.pwr_mode

register. Directly after the transition to an active mode, the first measurement will be performed. It is recommended to set

the desired measurement configuration, before switching the mode.

4.3.8 Mode-depending register write restrictions

A number of registers and register fields can only be updated when the device is in STANDBY mode. These are for

example the registers for NVM operations (see section 4.8 NVM Programmability), but also configuration registers for the

FIFO and IIR configuration. The register descriptions state if this limitation applies to a register field. Write operations to

these registers in a mode other than STANDBY are lost. It is generally recommended to write configurations before

switching into the measurement mode.

4.3.9 Post-power-up procedure

After power up of the BMP585, it is available after t_powerup. The host should not initiate any communication with the

BMP585 before. Depending on the interface configuration, a dummy read should be the first access to the device (see

section 5.1 Protocol Selection).

It is recommended that the host checks the following status registers after a power-up:



read out the CHIP_ID register and check that it is not all 0



read out the STATUS register and check that status_nvm_rdy==1, status_nvm_err == 0



read out the INT_STATUS.por register field and check that it is set to 1; that means INT_STATUS==0x10

4.3.10 Soft reset

BMP585 can be reset by writing 0xB6 to the CMD register. The BMP585 will come out of the reset after tsoft_res. Softreset

must not be triggered during a NVM user programming sequence.

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