Ever get stuck choosing the right logic chip combination or voltage level translator? Give up the hunt and create your own custom logic chip. CPLDs can give you the logic you need, with the pinout you want, while saving board space and board revisions.

 

The Xilinx XC9500XL family has some of the cheapest and readily-available CPLDs. This development board from Dangerous Prototypes will help you build your first custom logic chip using simple schematic entry, Verilog, or VHDL.

• XC9572XL CPLD with 72 macrocells
• 5volt tolerant inputs
• On-board 3.3volt power supply for core and pins
• Selectable 3.3volt or external supply for pins (1.8volt to 3.3volt)
• LEDs for output
• Push button for input
• Populated JTAG header
• Easy to program with the Bus Pirate
• Open source (CC-BY-SA)

 

• Hardware design
• CPLD programming and development tutorials (lots and lots of info)
• XC9572XL datasheet
• Free Xilinx ISE development software
• XC9500XL vs CoolRunner-II