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The Texas Instruments HDC3020 Evaluation Module (HDC3020EVM) enables designers to evaluate the operation and performance of the HDC3020 Relative Humidity and Temperature Sensor. The EVM hosts an MSP430F5528 microcontroller (MCU) as well as the HDC3020. The MCU is used to control the HDC3020 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 MCU section of the board to reduce thermal mass surrounding the HDC3020. The HDC3020EVM is configured by default to use the HDC3020 device with I2C address 0x44 (7 bit).
The EVM contains one HDC3020 (see Table 1-1)
DEVICE | IC | PACKAGE |
---|---|---|
U1 |
HDC3020 |
2.5 mm × 2.5 mm DFN |
This section describes how to connect, set up, and program the HDC3020EVM.
The HDC3020EVM power is supplied through the USB connector. The interface is used to access the device’s registers and read the conversion data from the HDC3020 through the I2C communication protocol. The LDO (U4) converts the 5 V from the USB to 3.3 V used by the HDC3020 and the MSP430. The EVM can be directly inserted into a USB port on a PC or laptop, or connected to the latter using the appropriate USB cable.