Switchbox

Switchboxes are especially used in integrated circuits with programmable logic (e.g. FPGAs). They are used to establish configurable signal paths between logic blocks. The present invention is based on the task to present a switchbox with a small number of multiplexers and configuration bits, which can both forward a signal in signal direction and can implement a change of direction.The task is solved by using switchboxes consisting of direction multiplexers and at least one direction change multiplexer. Thus the signal direction can be changed arbitrarily without increasing the size of the direction change multiplexers.