ST ST72F651, User Manual, Page: 13 / 30

UM0452 USB power/GUI mode of evaluation board
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Figure 8. GUI on start up with board not connected
4.2 Powering of board in GUI mode
Follow these steps in order to power the board in GUI mode:
1. Adjust the power selection switch (S1) to select USB power mode as explained in
Figure 4 .
2. Plug the USB cable in the USB socket (J2) on the board. As soon as the USB cable is
plugged in, the red LED lights up.
Note: This LED (USB) shows only that power is connected or not. Power to board is selected
through the power selection switch (S1).
3. After plugging in the USB cable and if the power switch is correctly set, then the status
in the status bar of GUI changes to "Connected" as shown in
Figure 9 .