LPS225HB datasheet(32/47 Pages) STMICROELECTRONICS

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LPS225HB

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AUTOZERO, when set to ‘1’, the actual pressure output value is copied in the REF_P

registers. From that point on, the content of the Ref_P registers is subtracted from the

pressure output value. To disable autozero, the REF_P registers have to be cleared.

The RESET_AZ bit is used to reset the AutoZero function. Resetting REF_P reg (15h, 16h,

17h) sets the pressure reference to the default value in the RPDS reg (18h, 19h).

RESET_AZ is self-cleared.

The DIFF_EN bit is used to enable the computing of the differential pressure output. It is

recommended to enable DIFF_EN after the configuration of REF_P_x and THS_P_x.

8.2

THS_P_L (0Ch)

Threshold pressure (LSB)

Address:

0Ch (R/W)

Reset:

00h

Description:

This register contains the low part of threshold value for pressure interrupt generation.

The complete threshold value is given by THS_P_H (0Dh) & THS_P_L (0Ch) and is

expressed as an unsigned number. P_ths (hPa) = (THS_P)/16.

[7:0] THS7-0: LSB threshold pressure.

8.3

THS_P_H (0Dh)

Threshold pressure (MSB)

Address:

0Dh (R/W)

Reset:

00h

Description:

This register contains the high part of threshold value for pressure interrupt

generation. (See description THS_P_L (0Ch)).

[15:8] THS15-8: MSB threshold pressure.

654321

THS7

THS6

THS5

THS4

THS3

THS2

THS1

THS0

THS15

THS14

THS13

THS12

THS11

THS10

THS9

THS8

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