Xilinx Documents

• Introduction to Xilinx Products (pdf)
• Spartan article (pdf)

Tool Flow

• Xilinx Alliance-based Design Flow
• FPGA Express-based Design Flow

Data Sheets

• XC4000 E and X Series Data Sheet (includes IOB description) (pdf)
• XC4000XL Electrical Specifications (pdf)
• XC4000XLA/XV Family Data Sheet (pdf)
• XC4000XLA Electrical Characteristics (pdf)
• XC4000XLA Package Pinouts (pdf)
• XC4000XV Electrical Characteristics (pdf)
• XC4000XV Package Pinouts (pdf)
• Spartan and Spartan XL Data Sheet (pdf)

Answers Database

• Estimating Power Consumption for 3.3v Devices
• 5v Power Tolerance
• Spartan / XL Footprint Compatibility
• Comparison Between Spartan and XC4000E

Application Notes

• Choosing a Xilinx Product Family (pdf)
• I/O Characteristics in the 'XL FPGAs (pdf)
• Conserving Power With Auto Power Down Mode in Spartan XL FPGA's (pdf)
• Using Manual Power Down Mode With Spartan XL FPGA's (pdf)
• A Simple Method of Estimating Power in XC4000XL/EX/E FPGA's (pdf)