Selected Xilinx software and most fee-based LogiCORE™ IP cores require a FLEXNet license key to enable use by customers.
Xilinx Software Tools
FLEXNet license keys are required by certain Xilinx software tools. See the Licensing FAQ for more information.
Xilinx LogiCORE IP cores licensed with ISE® Design Suite Software at no additional charge do not require an additional key.
Fee-based LogiCORE IP Cores
Simulation Only Keys
Simulation Only keys allow you to perform functional simulation only. They are shipped with the ISE™ software for most fee-based LogiCORE IP cores.
Hardware Evaluation Keys
Hardware Evaluation keys allow you to simulate and implement your design, run timing analysis and generate a time-limited bitstream to program a Xilinx FPGA. The core in the programmed device will function in hardware for anywhere from 2 to 8 hours, depending on the core.
Hardware Evaluation keys for Processor IP cores are shipped with the ISE Design Suite Embedded Edition software.