Programming antifuses in Crosspoint´s FPGA

This paper describes how Crosspoint programs antifuses in its fine grain architecture. It compares the programming circuits used by Crosspoint to the circuits used by Actel and Quick-logic. Every antifuse in Crosspoint´s FPGA can be uniquely programmed using a three dimensional addressing scheme to independently drive each electrode of the antifuse. The circuitry supports 10 V programming and 13.5 mA programming current to any target antifuse. Although the programming overhead is high, the antifuses are programmed to an average 50 Ω resistance, thus providing for high performance operation of the FPGA