LPS25HB Datasheet, PDF (33/40 Pages) STMicroelectronics – MEMS pressure sensor: 260-1260 hPa absolute digital output barometer

LPS25HB
8.12
STATUS_REG (27h)
Status register
7
6
RES
5
P_OR
4
T_OR
Register description
3
2
RES
1
P_DA
0
T_DA
P_OR
T_OR
P_DA
T_DA
Pressure data overrun.
(0: no overrun has occurred;
1: new data for pressure has overwritten the previous one)
Temperature data overrun.
(0: no overrun has occurred;
1: a new data for temperature has overwritten the previous one)
Pressure data available.
(0: new data for pressure is not yet available;
1: new data for pressure is available)
Temperature data available.
(0: new data for temperature is not yet available;
1: new data for temperature is available)
This register is updated every ODR cycle, regardless of the BDU value in CTRL_REG1
(20h).
P_DA is set to 1 whenever a new pressure sample is available. P_DA is cleared when the
PRESS_OUT_H (2Ah) register is read.
T_DA is set to 1 whenever a new temperature sample is available. T_DA is cleared when
the TEMP_OUT_H (2Ch) register is read.
P_OR bit is set to '1' whenever new pressure data is available and P_DA was set in the
previous ODR cycle and not cleared. P_OR is cleared when the PRESS_OUT_H (2Ah)
register is read.
T_OR is set to ‘1’ whenever new temperature data is available and T_DA was set in the
previous ODR cycle and not cleared. T_OR is cleared when the TEMP_OUT_H (2Ch)
register is read.
8.13
PRESS_OUT_XL (28h)
Pressure output value (LSB)
7
POUT7
6
POUT6
5
POUT5
4
POUT4
3
POUT3
2
POUT2
1
POUT1
0
POUT0
POUT[7:0] This register contains the low part of the pressure output value.
The pressure output value is a 24-bit data that contains the measured pressure. It is
composed of PRESS_OUT_H (2Ah), PRESS_OUT_L (29h) and PRESS_OUT_XL (28h).
The value is expressed as 2’s complement.
DocID027112 Rev 2
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