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 Quicklogic. 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 volt programming and 13.5ma programming current to any target antifuse. Although the programming overhead is high, the antifuses are programmed to an average 50 Cl resistance, thus providing for high performance operation of the FPGA.
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