ILPS28QSW datasheet(39/52 Pages) STMICROELECTRONICS

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10.13

I3C_IF_CTRL (19h)

Control register (R/W)

ASF_ON

I3C_Bus_

Avb_Sel1

I3C_Bus_

Avb_Sel0

ASF_ON

Enables 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)

10.14

RPDS_L (1Ah)

Pressure offset (LSB data)

RPDS7

RPDS6

RPDS5

RPDS4

RPDS3

RPDS2

RPDS1

RPDS0

RPDS[7:0]

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

The pressure offset value is 16-bit data that can be used to implement one-point calibration (OPC) after soldering.

This value is composed of RPDS_H (1Bh) and RPDS_L (1Ah). The value is expressed as two's complement.

The customer can perform a one-point calibration after soldering (recommended) and the offset coefficient can be

stored for OPC in register RPDS (1Ah, 1Bh). These stored offset values are directly added to the compensated

pressure data in the block diagram below. To give better flexibility to the user, the OPC value can be written twice

in the same register map. For further details, refer to the application note.

Figure 18. One-point calibration

ILPS28QSW

I3C_IF_CTRL (19h)

DS13905 - Rev 1

page 39/52

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