BMP581 datasheet(27/75 Pages) BOSCH

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Bosch Sensortec | BST-BMP581-DS004-11

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Document number: BST-BMP581-DS004-11

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

POR interrupts are not supported with I3C IBI, as the device is not in a state where I3C is initialized after power-up

reset. Also, the interrupt pin will not flag an POR interrupt, as the interrupt pin is disabled after power-up.

The status of the interrupt can be read from INT_STATUS.por. A read of the INT_STATUS will clear the status.

4.7.3 Interrupt pin

The BMP581 provides an interrupt pin (INT), which allows to signal certain events to the host processor.

4.7.3.1

Interrupt pin configuration

The behavior of the interrupt pin can be configured in INT_CONFIG with these fields:



int_mode: The interrupt mode can be „pulsed“ or „latched“. Latching determines when an interrupt is released (see

Chapter 3.7.3.2 for details)

int_pol: The interrupt polarity can be configured to be either „active high“ or „active low“

int_od: The interrupt pin can be configured to be „open-drain“ or push-pull“



int_en: The interrupt pin can be enabled. With enabled interrupt pin, all interrupt sources configured in INT_-

SOURCE will be ORed on the interrupt pin.

4.7.3.2

Interrupt Timings

Interrupt timings depend strongly on the int_mode setting:

Pulsed mode. In the pulsed mode the INT pin creates a pulse on the interrupt pin, each time an interrupt condition

changes from FALSE to TRUE, and the interrupt source is enabled in INT_SOURCE. Figure 5 shows the timing of

pulsed mode.

The pulse length is tint_pulse. Between two pulses, there is a minimum gap of tint_deassert in which the pin will stay de-

asserted.

Figure 5: INT pin timing in pulsed mode

BMP581 数据表(PDF) 27 Page - Bosch Sensortec GmbH