3 EVM Hardware
This section describes how to connect, set up, and program the HDC3020EVM.
Figure 3-1. HDC3020EVM
3.1 EVM Power Supply
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 I
2
C 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.
3.2 Input/Output Connectors
The EVM can be broken off into two sections. The headers on module are not populated and they can be used
to debug the firmware by using a 4-wire cable. The through holes can also be used as a test point to probe these
signals during EVM operation.
EVM Hardware
4
HDC3020EVM User Guide
SNAU267A – JUNE 2021 – REVISED JUNE 2021
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