SNAU265C june   2021  – july 2023 HDC3020 , HDC3020-Q1 , HDC3021 , HDC3021-Q1 , HDC3022 , HDC3022-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1HDC302x Devices
    1. 1.1 HDC3020 in WSON
    2. 1.2 HDC3021 in WSON
    3. 1.3 HDC3022 in WSON
  5. 2Storage and Handling Guidelines
    1. 2.1 Exposure to Contaminants
    2. 2.2 Chemical Analysis
      1. 2.2.1 Saturation and Recovery Tests
      2. 2.2.2 Long-Term Exposure
    3. 2.3 Packaging and Storing
      1. 2.3.1 Assembly
      2. 2.3.2 Application in Extreme Environment
  6. 3Programming the HDC3020
    1. 3.1 Trigger-On Demand
    2. 3.2 Auto Measurement
    3. 3.3 Programming the CRC
      1. 3.3.1 CRC C Code
    4. 3.4 Condensation Removal
    5. 3.5 Offset Error Correction
      1. 3.5.1 Offset Error Correction Example With a Fingerboard
  7. 4References
  8. 5Revision History

3.1 Trigger-On Demand

In this mode, I2C commands triggers each measurement conversion. After device power up, the device is placed in sleep mode waiting for an input.

To configure the device to collect both the humidity and temperature data in a single acquisition mode, select TRIGGER ON DEMAND (MSB HEX CODE 24) in the command table along with the appropriate low power mode selection. The device will exit from sleep mode and perform a single measurement. Figure 3-1 shows the Trigger-on Demand mode.

GUID-40B53A27-323E-435E-B7DC-C6BB32A38FB8-low.svgFigure 3-1 Flowchart for Trigger-On Demand Mode.