Slices exist in the CLB. Each slice contains two lookup tables and two registers.In each slice, there are other logics such as multiplexer F5 F6 F7 and F8 multiplexer routing and carry logic.
FPGA XC5200 Family 23K Gates 1936 Cells 83MHz 0.5um Technology 5V 208-Pin HSPQFP EP
FPGA Spartan-3 Family 50K Gates 1728 Cells 725MHz 90nm Technology 1.2V 132-Pin CSBGA
FPGA Spartan-3 Family 50K Gates 1728 Cells 725MHz 90nm Technology 1.2V 100-Pin VTQFP
FPGA Spartan-3A Family 50K Gates 1584 Cells 667MHz 90nm Technology 1.2V 144-Pin TQFP
FPGA Spartan-3A Family 50K Gates 1584 Cells 770MHz 90nm Technology 1.2V 256-Pin FTBGA
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