LPS35HW datasheet(39/48 Pages) STMICROELECTRONICS

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LPS35HW

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8.15

INT_SOURCE_25h

Interrupt source

Table 31: INT_SOURCE (25h) register

BOOT_STATUS

If ‘1’ indicates that the Boot (Reboot) 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).

8.16

FIFO_STATUS_26h

FIFO status

Table 32: FIFO_STATUS (26h) register

FTH_FIFO

OVR

FSS5

FSS4

FSS3

FSS2

FSS1

FSS0

FTH_FIFO

FIFO threshold status.

(0: FIFO filling is lower than treshold level,

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

OVR

FIFO overrun status.

(0: FIFO is not completely full;

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

FSS[5:0]

FIFO stored data level.

(000000: FIFO empty, 100000: FIFO is full and has 32 unread samples).

Table 33: FIFO_STATUS example: OVR/FSS details

FTH

OVRN

FSS5

FSS4

FSS3

FSS2

FSS1

FSS0

Description

FIFO empty

-- (1)

1 unread sample

...

--(1)

32 unread sample

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