ATSTK600-RC51 is a Routing card for 64 pin XMEGA in TQFP socket supplements the STK600 Starter Kit. The AVR device connects to the STK600 using an innovative routing and socket card sandwich system which routes the signals from the device to the appropriate hardware. The routing cards sit between the generic socket card and the STK600. The routing system is purely passive. No electronic components route the signals. So all I/O pins are directly accessible on the connectors with no altering of the electrical behaviour. The routing card design provides a low cost solution to support upcoming devices as the socket is the cost driving factor. The routing card has one pair of electric pads underneath to mate with the STK600 spring loaded connector and in addition with one pair of pads on top where the socket card connector connects.