BMP384 datasheet(22/58 Pages) BOSCH

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Bosch Sensortec | BMP384 Datasheet

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Modifications reserved |Data subject not change without notice | Printed in Germany

Document number: BST-BMP384-DS003-11 Revision_1.0_112020

FIFO interrupts are mapped to the INT pad by enabling the respective functions. For mapping FIFO watermark reached

interrupt to the pad, the fwtm_en bit shall be written to ’1’ (disabling by ‘0’). The FIFO full interrupt can be mapped by writing

ffull_en with ‘1’).

3.7.5. Interrupt functions

3.7.5.1.

FIFO watermark interrupt

The FIFO watermark interrupt is used to signal, that fill level of the FIFO has reached a pre-set limit.

Fifo_length_1 & fifo_length_0 ≥

fifo_wtm_1 & fifo_wtm_0

The watermark level can be set and adjusted by the user by writing the registers and 0x15 “FIFO_WTM_0” and 0x16

“FIFO_WTM_1” (see 4.3.11) in a single burst transaction. If the FIFO watermark level is set to zero, the interrupt condition

will never be satisfied.

The status of the watermark interrupt can be read back through the fwm_int bit. The interrupt condition is also updated after

the end of a serial interface transaction which wrote into the registers fifo_wtm_0 or fifo_wtm_1.

Figure 7: FIFO watermark interrupt, non-latched with reads from FIFO

Figure 8: FIFO watermark interrupt, latched, with reads from FIFO

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