LPS331AP

Register description

Doc ID 022112 Rev 7

23/36

CTRL_REG3

Interrupt control

Address:

22h

Type:

R/W

Description:

Control register.

The device features two fully-programmable interrupt sources (INT1 and INT2) which may

be configured to trigger different pressure events. Figure 10 shows the block diagram of the

interrupt generation block and output pressure data.

The device may also be configured to generate, through interrupt pins, a Data Ready signal

(Drdy) which indicates when a new measured pressure data is available, thus simplifying

data synchronization in digital systems.

76

543

210

INT_H_L

PP_OD

INT2_S3

INT2_S2

INT2_S1

INT1_S3

INT1_S2

INT1S1

[7] INT_H_L: Interrupt active high, low. Default value: 0

(0: active high; 1: active low)

[6] PP_OD: Push-pull/open drain selection on interrupt pads. Default value: 0

(0: push-pull; 1: open drain)

[5:3] INT2_S3, INT2_S2, INT2_S1: data signal on INT2 pad control bits. Default value: 00

(see Table 19.)

[2:0 INT1_S3, INT1_S2, INT1_S1: data signal on INT1 pad control bits. Default value: 00

(see Table 19.)

Table 19.

Interrupt configurations

INT1(2)_S3

INT1(2)_S2

INT1(2)S1

INT1(2) pin

000

GND

0

0

1

Pressure high (P_high)

0

1

0

Pressure low (P_low)

011

P_low OR P_high

100

Data ready

101

Reserved

110

Reserved

111

Tri-state