LPS331AP Datasheet, PDF (21/36 Pages) STMicroelectronics – MEMS pressure sensor: 260-1260 mbar absolute digital output barometer

LPS331AP
Register description
Table 18.
ODR2
Output data rate bit configurations
ODR1
ODR0 Pressure output data rate
Temperature output data
rate
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
One shot
1 Hz
7 Hz
12.5 Hz
25 Hz
7 Hz
12.5 Hz
25 Hz
One shot
1 Hz
1 Hz
1 Hz
1 Hz
7 Hz
12.5 Hz
25 Hz
DIFF_EN bit is used to enable the circuitry for the computing of differential pressure output.
In default mode (DIF_EN=’0’) the circuitry is turned off. It is suggested to turn on the circuitry
only after the configuration of REF_P_x and THS_P_x.
BDU bit is used to inhibit the output registers update between the reading of upper and
lower register parts. In default mode (BDU = ‘0’), the lower and upper register parts are
updated continuously. If it is not sure to read faster than output data rate, it is recommended
to set BDU bit to ‘1’. In this way, after the reading of the lower (upper) register part, the
content of that output registers is not updated until the upper (lower) part is read too.
This feature avoids reading LSB and MSB related to different samples.
SIM bit selects the SPI serial interface mode. When SIM is ‘0’ (default value) the 4-wire
interface mode is selected and data coming from the device are sent to pin #7 (SDO).
In 3-wire interface mode, output data are sent to pin #6 (SDI/SDO).
Doc ID 022112 Rev 7
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