(No difference)
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And if you don't already have it, you need to get some USB cables, like these: *[http://www.ebay.com/sch/i.html?_from=R40&_sacat=0&_sop=15&_nkw=shielded%20mini%20usb%20cable&_sop=15 Mini USB A Male to USB B 5 Pin Male Shielded Cable] *[http://www.ebay.com/sch/i.html?LH_BIN=1&_from=R40&_sacat=0&_nkw=usb+male+to+female+extension+shielded&_sop=15 USB Male to Female Extension Shielded Cable]
如果没有的话,你可能还要准备一两根USB线: 一个是延长CP2102的USB延长线(不用延长的话可以不买), 一个是连接 Teensy 开发板的 mini-usb 线(Teensy可能有不同的接口,而且买Teensy的时候常常送一根很短的mini-usb线)