The TWR file is generated by Xilinx's static timing analysis tool, a timing analyzer. This file contains timing delay information related to the delay constraints added to the design.
FPGA Spartan-3A Family 50K Gates 1584 Cells 770MHz 90nm Technology 1.2V 256-Pin FTBGA
FPGA Spartan-3A Family 50K Gates 1584 Cells 770MHz 90nm Technology 1.2V 100-Pin VTQFP
FPGA XC5200 Family 23K Gates 1936 Cells 83MHz 0.5um Technology 5V 160-Pin PQFP
FPGA XC5200 Family 23K Gates 1936 Cells 83MHz 0.5um Technology 5V 304-Pin HPQFP
FPGA Virtex-II Family 1M Gates 11520 Cells 650MHz 0.15um Technology 1.5V 575-Pin BGA
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