The present invention is used in an FPGA device having programmable logic cells and a programmable interconnect array. In a preferred embodiment in which the logic cells are programmed using transistors controlled by memory cells and the interconnect structure is programmed using antifuses, a configuration...http://www.google.de/patents/US5291079?utm_source=gb-gplus-sharePatent US5291079 - Configuration control unit for programming a field programmable gate array and reading array status
