7

Register description

The device contains a set of registers which are used to control its behavior and to retrieve pressure and

temperature data. The register address, made up of 7 bits, is used to identify them and to read/write the data

through the serial interface.

7.1

WHO_AM_I (0Fh)

Device Who am I

7

6

5

4

3

2

1

0

1

0

1

1

0

0

0

1

7.2

CTRL_REG1 (10h)

Control register 1

7

6

5

4

3

2

1

0

0(1)

ODR2

ODR1

ODR0

EN_LPFP

LPFP_CFG

BDU

0(1)

1. This bit must be set to ‘0’ for proper operation of the device.

ODR[2:0]

Output data rate selection. Default value: 000

Refer to Table 16.

EN_LPFP

Enable low-pass filter on pressure data. Default value: 0

(0: low-pass filter disabled; 1: low-pass filter enabled)

LPFP_CFG

Low-pass configuration register. Default value: 0

Refer to Table 17.

BDU(1)

Block data update. Default value: 0

(0: continuous update;

1: output registers not updated until MSB and LSB have been read)

1. To guarantee the correct behavior of the BDU feature, PRESS_OUT_H (2Ah) must be the last address read.

ODR2

ODR1

ODR0

Pressure (Hz)

Temperature (Hz)

0

0

0

Power down / one-shot mode enabled

0

0

1

1 Hz

1 Hz

0

1

0

10 Hz

10 Hz

0

1

1

25 Hz

25 Hz

1

0

0

50 Hz

50 Hz

1

0

1

75 Hz

75 Hz

LPS33K

Register description

DS12817 - Rev 3

page 16/31