SNIU039 December   2019

 

  1.   HDC2022EVM User's Guide
    1.     Trademarks
    2. 1 Quick Start
    3. 2 EVM GUI
      1. 2.1 Software Setup
        1. 2.1.1 Live Software on dev.ti.com
        2. 2.1.2 Offline Software
          1. 2.1.2.1 Download GUI from dev.ti.com
    4. 3 GUI Operation
      1. 3.1 Home Tab
      2. 3.2 Data Capture Tab
      3. 3.3 EVM Settings Tab
      4. 3.4 Device Configuration
      5. 3.5 Registers Tab
      6. 3.6 Collateral Tab
    5. 4 EVM Hardware
      1. 4.1 Input/Output Connector Description
        1. 4.1.1 J1 & J2 – 5x1 Headers
        2. 4.1.2 USB Type A Connector
      2. 4.2 EVM Operating Conditions
      3. 4.3 Device Address Configuration
      4. 4.4 Reducing the Sensor's Thermal Mass
    6. 5 Updating Firmware on HDC2022EVM
    7. 6 Board Layout
    8. 7 Schematic
    9. 8 HDC2022EVM Bill of Materials

4.3 Device Address Configuration

The onboard HDC2022's I2C address is set to 1000001xb on the EVM. This is done by setting the ADDR pin to VDD via a 0 ohm resistor (R4) (refer to Figure 11).

SNIU039_Figure2.pngFigure 11. HDC2022EVM : Sensor Module

To change the I2C address to 0x40, remove 0 Ω resistor R4 (refer to Figure 12 ).

SNIU039_Figure3.pngFigure 12. HDC2022EVM: Layout Resistors for I2C Address Setting - Top

Table 3. I2C Address

ADDR R4 HDC2022 ADDRESS
VDD Populated 1000001
Float Removed 1000000

In Table 3, the EVM default configuration is in bold.