K0582 Revision B
May 2015
21
x
The sensor power is cycled and the sensor returns to the power-up state.
x
User interaction results in a new data request being internally generated and
the sensor re-enters the acquire state.
CAUTION
Due to the low power consumption of the DPS 5000 sensors, the I
2
C-bus pull-up
resistors may provide sufficient power to maintain the sensor in the standby
state when the I
2
C-bus line is disconnected from the sensor. To ensure
the sensor is correctly powered down, disconnect the sensor completely from the
I
2
C-bus or turn off the I
2
C-bus network power supply.
Figure 7 shows the legend used within this section to describe the user interactions
with the sensor.
Figure 7 Interaction legend
Reading the pressure and temperature
4.2
The DPS 5000 sensors directly provide compensated pressure and temperature
data via the COMP_PRES and COMP_TEMP registers avoiding the need for the user
to undertake any additional calculations. Unless modified by the user (see section
4.4.3), the unit of pressure is that used by the manufacturer during calibration of the
sensor and defined in the PRES_UNIT register. The unit of temperature is always
°
C.
The following steps should be used to read the pressure and temperature data:
i.
Check the status of the new data available flag.
Read STATUS: CONV <0 [0]>
0b1 = new data available
ii.
Check that the data is valid.
Read STATUS: VALID [1..0] <0 [2..1]>
0b11 = new data valid
iii.
Get the compensated pressure data.
Read COMP_PRES: COMP_PRES [31..0] <1 [31..0]>
iv.
Get the unit of pressure information (optional).
Read PRES_UNIT: PRES_UNIT [7..0] <84 [7..0]>
v.
Get the compensated temperature data.
Read COMP_TEMP: COMP_TEMP [31..0] <2 [31..0]>
Updating the pressure and temperature
4.3
When the sensor enters the standby state for the first time, the new data available
flag, CONV (bit 0) of the STATUS register (address 0), will be set to indicate that
pressure and temperature data is available, This data will not be updated until a
new data request is generated, which can be achieved either manually or
automatically.
Manual update
4.3.1
A new data request is manually generated by the user:
