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)