LPS22DF datasheet(39/54 Pages) STMICROELECTRONICS

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9.11

FIFO_WTM (15h)

FIFO threshold setting register (R/W)

WTM6

WTM5

WTM4

WTM3

WTM2

WTM1

WTM0

WTM[6:0]

FIFO threshold. Watermark level setting. Default value: 0000000

9.12

REF_P_L (16h)

Reference pressure LSB data (R)

REFL7

REFL6

REFL5

REFL4

REFL3

REFL2

REFL1

REFL0

REFL[7:0]

This register contains the low part of the reference pressure value. Default value: 00000000

The Reference pressure value is 16-bit data and it is composed of REF_P_H (17h) and REF_P_L (16h). The

value is expressed as 2’s complement.

The reference pressure value is stored and used when the AUTOZERO or AUTOREFP function is enabled.

Please refer to the INTERRUPT_CFG (0Bh) register description.

9.13

REF_P_H (17h)

Reference pressure MSB data (R)

REFL15

REFL14

REFL13

REFL12

REFL11

REFL10

REFL9

REFL8

REFL[15:8]

This register contains the high part of the reference pressure value. Default value: 00000000

9.14

I3C_IF_CTRL_ADD (19h)

Control register (R/W)

ASF_ON

I3C_Bus_

Avb_Sel1

I3C_Bus_

Avb_Sel0

ASF_ON

Enable anti-spike filters. Default value: 0

(0: anti-spike filters are managed by protocol and turned off after the broadcast address;

1: anti-spike filters on SCL and SDA lines are always enabled)

I3C_Bus_Avb_Sel[1:0]

These bits are used to select the bus available time when I3C IBI is used. Default value: 00

(00: bus available time equal to 50 μsec;

01: bus available time equal to 2 μsec;

10: bus available time equal to 1 msec;

11: bus available time equal to 25 msec)

LPS22DF

FIFO_WTM (15h)

DS13316 - Rev 1

page 39/54

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