BMP585 datasheet(17/71 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

4.2 Power management

The BMP585 has two separate power supply pins:



VDD is the main power supply for all internal analog and digital regulator blocks



VDDIO is a separate power supply pin, used for the supply of the digital interface

VDD and VDDIO pins can be energized in any order. A power-on reset generator is built in which resets the logic circuitry

and the register values after the power-on sequence. The slope for ramp up time must be within the limits given by t_-

VDDramp and t_VDDIOramp. After powering up, the sensor settles in sleep mode (see also section 4.3.9 Post-power-up

procedure).

Holding any interface pin (SDI, SDO, SCK or CSB) at a logical high level when VDDIO is switched off can permanently

damage the device due caused by excessive current flow through the ESD protection diodes.

4.3 Power modes

The power modes of BMP585 and transitions in between are depicted in Figure 2. After startup or soft-reset, the

BMP585 will be in DEEP STANDBY mode. Transitions from one mode to another are only possible by entering SLEEP

mode first.

Figure 2: Power modes diagram

4.3.1 STANDBY mode

In STANDBY mode, no measurements are performed and power consumption is at a minimum. All registers are

accessible for write and read. Mode transitions to other modes are possible. The pressure and temperature data

registers PRESS_DATA_XXX and TEMP_DATA_XXX keep the values of the last measurement executed. The FIFO. if

enabled, also maintains its content and can be read.

4.3.2 DEEP STANDBY

In order to further reduce the power consumption further, the BMP585 offers a DEEP_STANDBY mode. In this case,

power consumption is even lower than in STANDBY mode.

DEEP_STANDBY will only be entered if also the following conditions apply:



ODR_CONFIG.deep_dis = 0



ODR_CONFIG.odr < 5Hz



FIFO_SEL.fifo_frame_sel = DIS



DSP_IIR.set_iir_t = BYPASS



DSP_IIR.set_iir_p = BYPASS

If one of these settings is changed, the BMP585 transitions to STANDBY mode.

BMP585 Datasheet(PDF) 17 Page - Bosch Sensortec GmbH

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