The Spartan™ and XC4000 series FPGA device family software support is considered stable and mature. The device support has been decoupled from the current ISE™ software to maintain this integrity.
New or existing designs targeting the Spartan, Spartan-XL, and XC4000 series device families can continue to use this software indefinitely.
Synthesis can be accomplished by using Synopsys FPGA Compiler-II, Synplicity Synplify, or Mentor Graphics LeonardoSpectrum™. The Spartan and XC4000 series device families were never supported by Xilinx Synthesis Technology.
The following Xilinx design entry tools can be used with LeonardoSpectrum™ as part of an integrated design flow:
Schematic capture can be accomplished with any tool that will produce an EDIF netlist for the Spartan or XC4000 series devices.