The JTAGkey is based on the FTDIChip FT2232L, is a USB 2.0 device and is used for:
http://www.koka-in.org/~kensyu/handicraft/diary/20080926.html
Amontec JTAGkey (FT2232)
原文：http://www.cnblogs.com/shangdawei/p/4763139.html
