Buffers of programmable depths are used in the instruction and reply paths of cascaded devices to account for possible differences in latencies between the devices. The antifuse may include: a device isolation layer defining a first active region in a semiconductor substrate; a first and second junction regions provided in the first active region; a second active region formed over the first junction region; a gate insulating layer formed over the first active region and the second active region; and a gate electrode formed over the gate insulating layer. Each one of the logic sections is fed a corresponding one of a plurality of request signals for the common resource. The input signal identification content of the signal identification circuit 3 can be changed according to the signal identification data. The top surface has a plurality of crimping openings which each expose one of the receptacles and the needle hole end therein.