At 03:06 PM 8/27/2010, Denny Esterline wrote: > > The Xilinx 9536 (it's a CPLD, given your application going to an FPGA > > isn't worth it) should fit the bill (if you need more logic, the 9572 > > has twice the capacity with the same footprint if you choose your > > package right). I'm just back from holidays and am thus just catching up with this=20 thread, but I have a slightly off-the-wall suggestion to offer. The guys at Dangerous Prototypes and The Gadget Factory have designed=20 a kick-ass logic analyzer based on a Xilinx FPGA. Its available from=20 Seeed Studios for less than US $45, including shipping. Note that=20 the price does NOT include the cables and clips if you plan to order=20 one for use in its intended purpose. The board contains two large (ish) chips: the PIC18F24J50 (USB=20 interface) and the Spartan3E XC3S250E FPGA. It also contains the=20 input buffer chip, boot ROM and 2 or 3 PSU regulators. The=20 regulators can supply at least 150mA - might be more. 16 of the FPGA i/o pins are fed by a 5V tolerant input buffer and are=20 thus input only. Another 16 i/o lines come out to header pin holes=20 and can be input or output. The PIC is used only for loading the=20 boot ROM that the FPGA reads on power-up and is therefore not a=20 factor in your 'no micros' policy - the FPGA doesn't even have to=20 know that the PIC exists (but it can). This board is a dandy FPGA development platform and is tidy enough=20 that you can use the board as-is in your final product. All that you=20 need to do is to supply the input and output signal=20 conditioning. The on-board headers make that easy. Some links: The development tools are free downloads. Hope this helps! dwayne --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .