* - Paranoid Studio's US2AX (V1, V2 and V3 hardware revisions)
* - PJRC Teensy (1.x and 2.x versions)
* - Sparkfun U2 Breakout Board
+ * - Stange ISP Programmer Board
* - TCNISO Blackcat USB JTAG
* - Tempusdictum Benito
* - Tom's USBTINY-MKII (all revisions and versions)