And the KVM switch allows you to change the source and USB devices at the same time by simply pressing the hotkey.

KVM 切换器让你只要按下热键，就可以同时更改源设备和 USB 设备。

So USB device read endpoint one out complete.

这样USB设备读取端点一出就完成了。

If you plug in a USB device, it doesn't have an address assigned yet.

如果您插入 USB 设备，它还没有分配地址。

And then you have a USB device that you can use to load code into the chip.

然后你就有了一个 USB 设备，你可以用它来将代码加载到芯片中。

An example of this is the Juul, which not only looks like a USB device but can also be plugged into a USB outlet to charge.

这方面的一个例子是 Juul，它不仅看起来像 USB 设备， 而且还可以插入 USB 插座充电。

Every time you plug in a USB device, the USB host stack is going to read some so-called descriptors, which tell the operating system what kind of device is that.

每次插入 USB 设备时，USB 主机堆栈都会读取一些所谓的描述符，告诉操作系统这是什么类型的设备。