LPS331AP datasheet(20/36 Pages) STMICROELECTRONICS

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LPS331AP

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Doc ID 022112 Rev 7

WHO_AM_I

Device identification

Address:

0Fh

Type:

Description:

This read-only register contains the device identifier that, for LPS331AP, is set to BBh.

CTRL_REG1

Control register 1

Address:

20h

Type:

R/W

Description:

Control register.

PD bit allows to turn on the device. The device is in power-down mode when PD = ‘0’

(default value after boot). The device is active when PD is set to ‘1’.

ODR2- ODR1 - ODR0 bits allow to change the output data rates of pressure and

temperature samples. The default value is “000” which corresponds to “one shot

configuration” for both pressure and temperature output. ODR2, ODR1 and ODR0 bits can

be configured as described in Table 18.

Note:

Before changing the ODR it is necessary to power down the device (CTRL_REG1[7]).

543

210

111

011

543

210

ODR2

ODR1

ODR0

DIFF_EN

DBDU

DELTA_EN

SIM

[7] PD: power down control.

Default value: 0

(0: power-down mode; 1: active mode)

[6:4] ODR2, ODR1, ODR0: output data rate selection.

Default value: 00

(see Table 18)

[3] DIFF_EN: Interrupt circuit enable.

Default value: 0

(0: interrupt generation disabled; 1: interrupt circuit enabled)

[2] BDU: block data update.

Default value: 0

(0: continuous update; 1: output registers not updated until MSB and LSB reading)

[1] DELTA_EN: delta pressure enable

(1: delta pressure registers enabled. 0: disable)

[0] SIM: SPI Serial Interface Mode selection.

Default value: 0

(0: 4-wire interface; 1: 3-wire interface)

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