BMP585 datasheet(46/71 Pages) BOSCH

46 / 71 page

Bosch Sensortec

| BST-BMP585-DS003-02

46 | 71

Document number: BST-BMP585-DS003-02

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

6.2 Connection Diagrams

The sensor (including the ASIC) should be used in one of the following four configurations on application level. In all

connection scenarios:



all VSS pins must be connected to GND.



if the INT pin is not used, it is recommended to be connect it to GND, rather than leaving it floating. In the case of

GND connection, the interrupt pin must be disabled by keeping INT_CONFIG.int_en disabled. If the INT pin must be

unconnected in the application, it is recommended to use the following settings for INT_CONFIG:

o INT_CONFIG.int_en = 1

o INT_CONFIG.int_od = 0

o INT_CONFIG.pad_int_drv = 0

6.2.1 SPI 3-wire

Figure 23: SPI 3-wire connection diagram

The SDO pin must be left floating. The reason is, that the device starts in SPI4 mode after power-up, and drives SDO until

the switch to SPI3 is commanded.

The SDI pin must be driven to either low or high voltage when no communication takes place. Otherwise, a floating SDI

may create excessive power consumption (and on the long-term potentially also damage to the device), as the input pad

is not disabled.

BMP585

VDDIO

VSS

VDD

SCK

CSB

SDX

SDO

INT

100 nF

VDDIO

VDD

1.2…3.3 V

1.8…3.3 V

BMP585 Datasheet(PDF) 46 Page - Bosch Sensortec GmbH