LPS25H datasheet(28/45 Pages) STMICROELECTRONICS

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LPS25H

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ONE_SHOT bit is used to start a new conversion when ODR2..0 bits in CTRL_REG1 are

set to “000”. Write ‘1’ in ONE_SHOT to trigger a single measurement of pressure and

temperature. Once the measurement is done, ONE_SHOT bit will self-clear and the new

data are available in the output registers, and the STATUS_REG bits are updated.

7.8

CTRL_REG3

Interrupt control

Address:

22h (R/W)

Reset:

00h

Description:

Control register.

The device features one fully-programmable interrupt sources (INT1) that can be configured

to trigger different pressure events. Figure 12 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 or to optimize the system power consumption.

543

210

INT_H_L

PP_OD

Reserved

INT1_S2

INT1_S1

[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)

[5:2] Reserved

[1:0] INT1_S2, INT1_S1: data signal on INT1 pad control bits. Default value: 00

(see Table 19)

Table 19. Interrupt configurations

INT1_S2

INT1_S1

INT1 pin

Data signal (see CTRL_REG4)

Pressure high (P_high)

Pressure low (P_low)

Pressure low OR high

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