LPS22DF datasheet(41/54 Pages) STMICROELECTRONICS

41 / 54 page

9.17

INT_SOURCE (24h)

Interrupt source (read only) register for differential pressure. A read at this address clears the INT_SOURCE

BOOT_ON

Indication that Boot (reboot) phase is running.

(0: boot phase not running; 1: boot phase is running)

Interrupt active.

(0: no interrupt has been generated;

1: one or more interrupt events have been generated).

Differential pressure Low.

(0: no interrupt has been generated;

1: low differential pressure event has occurred).

Differential pressure High.

(0: no interrupt has been generated;

1: high differential pressure event has occurred).

9.18

FIFO_STATUS1 (25h)

FIFO status register (read only)

FSS7

FSS6

FSS5

FSS4

FSS3

FSS2

FSS1

FSS0

FSS[7:0]

FIFO stored data level, number of unread samples stored in FIFO.

(00000000: FIFO empty; 10000000: FIFO full, 128 unread samples)

9.19

FIFO_STATUS2 (26h)

FIFO status register (read only)

FIFO_WTM_IA

FIFO_OVR_IA

FIFO_FULL_IA

FIFO_WTM_IA

FIFO threshold (watermark) status. Default value: 0

(0: FIFO filling is lower than threshold level;

1: FIFO filling is equal or higher than threshold level).

FIFO_OVR_IA

FIFO overrun status. Default value: 0

(0: FIFO is not completely full;

1: FIFO is full and at least one sample in the FIFO has been overwritten).

FIFO_FULL_IA

FIFO full status. Default value: 0

(0: FIFO is not completely filled;

1: FIFO is completely filled, no samples overwritten)

LPS22DF

INT_SOURCE (24h)

DS13316 - Rev 1

page 41/54

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