On Sun, May 8, 2011 at 10:46 AM, Oli Glaser wrote= : > At the very least - I made a 2-layer test board for a 64 pin FPGA that > "worked", but for any serious use you need power and ground planes for > decoupling and controlled impedance purposes, plus the extra routing > space. Look into high speed digital techniques and you will see why all > this is necessary. Xilinx should have some relevant documentation on > their site, about the optimum setup for their chips, how many IOs can > switch at once, thermal considerations, etc. Looks like I need a degree in EE. I'll go sit in the EE lectures at my university in my spare time next year. This looks like some serious stuff. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .