LPS225HB datasheet(41/47 Pages) STMICROELECTRONICS

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LPS225HB

8.15

INT_SOURCE (25h)

Interrupt source

Address:

25h (R)

Reset:

00h

Description:

INT_SOURCE register is cleared by reading it

[7] BOOT_STATUS: If ‘1’ indicates that the Boot (Reboot) phase is running

[6:3] Reserved

[2] IA: Interrupt active.

(0: no interrupt has been generated; 1: one or more interrupt events have been

generated).

[1] PL: Differential pressure Low.

(0: no interrupt has been generated; 1: Low differential pressure event has

occurred).

[0] PH: Differential pressure High.

(0: no interrupt has been generated; 1: High differential pressure event has

occurred).

8.16

FIFO_STATUS (26h)

FIFO status

Address:

26h (R)

Reset:

00h

Description:

[7] FTH_FIFO: FIFO threshold status. Default value: 0

(0: FIFO filling is lower than FTH level, 1: FIFO filling is equal to or higher than

threshold level)

Description:

[6] OVRN: Overrun bit status. Default value: 0

(0: FIFO is not completely filled,1: FIFO is completely filled and at least one

sample has been overwritten)

Description:

[5:0] FSS: number of unread samples stored in FIFO. Default value: 0

(000000: FIFO empty, 100000: FIFO full, 32 unread samples)

54321

BOOT_STATUS

654321

FTH_FIFO

OVR

FSS5

FSS4

FSS3

FSS2

FSS!

FSS0

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