It appears that this is a student assignment but it's not clear from your message if the assignment includes designing a hardware circuit using an fpga or if it is just to program an fgpa in an existing circuit.
It is a free topic assignment. I have to do something, and I want do do a small usb logic analyzer, because I know I can do it. One option was to use a XC9572XL, which I know how to set up and program, or I could just put a small fpga so that I can have proper functionality and expand it at some later time.
I could actually use a module, and I do indeed have one, but I would like to do it all on a single pcb. Since I always used Xilinx stuff, I would like to use an Xilinx fpga, just because I already know how the Xilinx ide works.
As for the schematic, any recommendations of a properly built open source module that I could clone the schematic from that includes something like a Spartan 3 XC3S200, or any other Xilinx fpga that is cheap, non bga and runs on 3.3V?