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→The method of using the 13pin interface of the development board to expand the USB interface
<li>If you need to connect two USB devices to the 13pin interface at the same time, you will find that the 5V and GND pins on the 13pin interface are not enough. At this time, one of the USB devices can use the 5V and GND pins in the 26pin interface. The location is as shown in the figure below Shown:</li>
[[File:zero3-img24-1.png]]
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