Xilinx CPLD design techniques online documentation
This entry was posted in CPLD, documentation and tagged Xilinx.
Xilinx has an online searchable database of information on programming their CPLD devices. It includes a number of cool tips and code samples for implementing bidirectional signals, clock dividers, global nets as well as information on CPLD attributes, the schematic library and controlling I/O pin voltages. In many cases code examples are provided in VHDL, Verilog, and ABEL along with schematic.