Texas Instruments HDC2080EVM User manual

HDC2080EVM User 's Guide
User's Guide
Literature Number: SNAU197
April 2018

2SNAU197–April 2018
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HDC2080EVM User 's Guide
User's Guide
SNAU197–April 2018
HDC2080EVM User 's Guide
1 Introduction
The Texas Instruments HDC2080EVM evaluation module (EVM) enables designers to evaluate the
operation and performance of the HDC2080 Relative Humidity and Temperature Sensor.
The EVM contains one HDC2080 (See Table 1).
Table 1. Device and Package Configurations
DEVICE IC PACKAGE
U1 HDC2080DMBR PWSON (6-pin) DMB
The EVM hosts an MSP430F5528 microcontroller (µC) as well as the HDC2080. The µC is used to control
the HDC2080 and communicate with a host PC through a USB port. The EVM is designed to be broken
into two sections if desired. The sensor section can be separated from the µC section so that the user can
remotely locate the sensor from the µC section.
2 Setup
This section describes the connectors on the EVM as well and how to properly connect, setup and use the
HDC2080EVM.
Figure 1. HDC2080EVM

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2.1 Input/Output Connector Description
2.1.1 J1 – 5x1 Header
This header is not populated and can be installed if the EVM is broken in 2 sections: PC interface and
Sensor. This connector with its counterpart J2 allows the communication of the two sections through a 5-
wire cable
J1.1 GND
J1.2 SDA
J1.3 SCL
J1.4 INT
J1.5 VDD
2.1.2 J2 – 5x1 Header
This header is not populated and can be installed if the EVM is broken in 2 sections: PC interface and
Sensor. This connector with its counterpart J1 allows the communication of the two sections through a 5-
wire cable.
J2.1 GND
J2.2 SDA
J2.3 SCL
J2.4 INT
J2.5 VDD
2.1.3 USB Type A Connector
This connector is used for communications with the PC and provides power for the EVM.
2.2 Hardware Setup
The HDC2080EVM power is supplied via the USB connector. The LDO (U4) converts the 5V from the
USB to 3.3V used by the HDC2080 and the MSP430. The EVM may be directly inserted into a USB port
on a PC or laptop, or may be connected to the latter using the appropriate USB cable.
The I2C address of the HDC2080 is set at EVM level at 1000000xb on the EVM. The I2C address has
been set mounting the 0 Ωresistor R12 (refer to Figure 2).

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Figure 2. HDC2080EVM : Sensor Module
To change the I2C address, remove the resistor R12 and populate the R4 with 0 Ωresistor (refer to
Figure 3 )

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Figure 3. HDC2080EVM: Layout Resistors for I2C Address Setting - Top
Table 2. I2C Address
ADDR R12 R4 HDC2080 ADDRESS
0 Short Open 1000000
1 Open Short 1000001
In Table 2, the EVM default configuration is in bold.

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2.3 Software Setup
2.3.1 System Requirements
The Sensing Solutions GUI supports:
• 64-bit Windows 7
• 64-bit Windows XP
The current GUI does not support 32-bit Windows operating systems. The host machine is required for
device configuration and data streaming. The following steps are necessary to prepare the EVM for the
GUI:
• The GUI and EVM driver must be installed on the host.
• The EVM must be connected to a full speed USB port (USB 1.0 or above).
2.3.2 Sensing Solutions GUI and EVM Driver Installation
The Sensing Solutions GUI and EVM driver installer is packaged in a zip file. Follow these steps to install
the software.
1. Download the software ZIP file from the EVM tool page
2. Extract the downloaded ZIP file
3. Run the included executable
4. Follow all directions from the installer
Figure 4. GUI Installer Welcome Page

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5. Read the license agreement and if you still wish to install the software, select “I accept the agreement”
and click “Next” as shown in
Figure 5. GUI Installer License Agreement
6. Select the installation directory. If the user installing the software is not a system administrator a
directory not with “Program Files” must be chosen instead of the default.
Figure 6. GUI Installer Installation Directory

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7. Wait for all files to install
Figure 7. GUI Installer Copying Files
8. After the files have copied a device driver installer will start. If prompted about an unsigned driver,
choose to install the driver anyways. If running Windows 8 or 8.1, the PC must be started in a “Safe”
mode to install the unsigned driver.
Figure 8. EVM Driver Installer Welcome Page

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9. Wait for the driver to install
Figure 9. EVM Driver Installer In Progress
10. Click “Finish” after the driver has been installed
Figure 10. EVM Driver Installer Complete

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11. Click “Finish” to complete the software installation
Figure 11. GUI Installer Complete
2.4 Operation
When the EVM is connected, the host computer will automatically detect the device and
Launch the GUI. A detailed description of the GUI operation is presented later in this document.

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2.5 Reducing the Sensor Thermal Mass
The HDC2080EVM can be broken into 2 sections to isolate the thermal mass of the µC from the
HDC2080. Figure 12 shows the board perforations that allow the two sections to be broken apart.
Figure 12. HDC2080EVM : PC Interface and Sensor Module
The communication between the two modules is ensured through the connector J1 and J2 and a 5-wire
cable. In this configuration the thermal mass of the EVM is dramatically reduced, improving the
temperature measurements performances of the HDC2080. The cable connecting J1 to J2 must conform
to I2C cable length constraints. When used in this configuration, the GUI can still be used to communicate
with the EVM and collect data.
If the thermal mass of the sensor section is still excessive, the sensor section can be reduced by breaking
it at the perforation shown inFigure 13. The PCB segment that hosts the HDC2080 is 5.5mm x 5mm.
Figure 13. HDC2080EVM : PC Interface and Smaller Sensor Module
Also in the case where the EVM is broken in 2 sections it is still possible to use the GUI (ensuring the
connections between the modules) or alternatively it is possible to connect the sensor module to a custom
micro-controller. (Refer to Figure 14).

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Figure 14. HDC2080EVM : Pads for I2C and Supply of the Smaller Sensor Module

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3 GUI Operation
The section describes how to use the GUI
3.1 Starting the GUI
Follow these steps to start the GUI:
1. Select the windows start menu
2. Select “All programs”
3. Select the “Texas Instruments” folder
4. Select the Sensing Solutions GUI
5. Click “Sensing Solutions GUI”
6. Splash screen will appear for at least two seconds.
• Slower PC’s may show a blank splash screen without any texts for up to 20 seconds
Figure 15. GUI Splash Screen

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7. After the splash screen is displayed the main window will open. Note: Only one instance of the GUI
may be opened at a time!
Figure 16. GUI Introduction Page

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3.2 Connecting the EVM
Follow these steps to connect the EVM to the GUI:
1. Attach the EVM to the computer via the USB port.
2. The GUI always shows the connection status on the bottom left corner of the GUI
• The initial release of this GUI does not support multiple GUI instances or multiple devices. To
control multiple EVMs, virtual machines may be used or multiple PC’s are required. Future
releases will support multiple EVMs from a single instance of the GUI.
Figure 17. GUI Disconnected from EVM

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Figure 18. GUI Connected from EVM

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3.3 Navigating the GUI
To navigate to different pages of the GUI follow these steps:
1. Click “Menu” in the upper left corner
Figure 19. GUI Menu Button

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2. Select the desired page from the menu shown on the left
Figure 20. GUI Navigation Menu

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3.4 Configuring the Device Using Register Page
The register page allows users to control the device directly with the register values. The user may also
use this page to read the current register values on the device.
3.4.1 Automatically Updating GUI Register Values Using Auto-Read
Autoread will periodically request the register values on the device. Click the dropdown box next to “Auto
Read” to select the update interval.
Figure 21. Selecting Auto-Read Interval on Register Page
3.4.2 Manually Updating Device Register Values
There are two methods to change register values: update the entire register value or change a single bit
within the register. The recommended update mode is always “Immediate” and not “Deferred”. To update
register values, follow these steps.
1. Double-click the current value of the register that needs to be changed. The text will turn into an
editable text box

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Figure 22. Selecting a Register's Current Value for Editing on Register Page
2. Type the new value in hexadecimal into the box and click enter. The text box changes to normal text
and the GUI will send a command to the EVM to update the device register
Figure 23. Entering New Value for Register on Register Page