BMP581 datasheet(38/75 Pages) BOSCH

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Bosch Sensortec | BST-BMP581-DS004-11

38 | 75

Document number: BST-BMP581-DS004-11

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

Figure 11: SPI multi-byte read operation

5.5.4 SPI hybrid bursts

SPI also supports a combined write-read operation called hybrid burst. Figure 12 shows this protocol. The host may

decide to combine a read (single or burst) transaction together with a write (single or burst) transaction together.

Figure 12: SPI hybrid write-read burst

A CSB idle time of 1us must be ensured for reads following writes for the following registers:



DRIVE_CONFIG



INT_CONFIG



NVM_DATA_LSB



NVM_DATA_MSB

As a consequence, hybrid accesses on these registers are not allowed.

5.6I²C protocol

BMP581 supports the following I²C modes:



normal mode (100 kHz)



fast mode (100 - 400 kHz)



fast mode plus (400 kHz - 1 MHz)

The I²C slave address of BMP581 is 7'h46 for SDO = 1'b0 and 7'h47 for SDO = 1'b1. SDO must not be floating when

I²C is used, otherwise the I²C device address is undefined.

CSB has an integrated pull-up resistor, which can be enabled in I²C and I3C mode by setting

DRIVE_CONFIG.i2c_csb_pup_en.

BMP581 Datasheet(PDF) 38 Page - Bosch Sensortec GmbH