HP206C Datasheet, PDF (5/17 Pages) List of Unclassifed Manufacturers – PRECISION BAROMETER AND ALTIMETER SENSOR

DataSheet
HP206C
state.
The conversion time depends on the value of the OSR parameter sent to the device within the ADC_CVT
command. Six options of the OSR can be chosen, range from 128, 256 … to 4096. The below table shows
the conversion time according to the different values of OSR:
Table 5: Conversion Time VS OSR
Conversion Time (ms)
OSR
Temperature
Temperature and
Pressure (or Altitude)
128
256
512
1024
2048
4096
2.1
4.1
8.2
16.4
32.8
65.6
4.1
8.2
16.4
32.8
65.6
131.1
The higher OSR will normally achieve higher measuring precision, but consume more time and power.
The conversion results can be compensated or uncompensated. The user can enable/disable the
compensation by setting the PARA register before performing the conversions.
3.5 Altitude Computation
The device can compute the altitude according to the measured pressure and temperature. The altitude
value is updated and available to read as soon as the temperature and pressure measurement is done.
4. Access Modes & Commands
4.1 Operation Flow
During each power-up/reset cycle, the device will only perform one calibration. After that it will enter the
SLEEP state waiting for any incoming commands. It will take actions after receiving different proper
commands, and re-enters the SLEEP state when it finishes the jobs.
CALIBRATION
POR
Soft Reset
Command or
Reset from Pin
Other Commands
SLEEP
ACTIONS
Done
4.2 Command
The Command Set (Table 6) allows the user to control the device to perform the measuring, results
reading and the miscellaneous normal operations.
4.2.1 Soft Reset the Device
.SOFT_RST (0x06)
Once the user issues this command, the device will immediately be reset no matter what it is working on.
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