Greetings From: "andy pugh" <bodge...@gmail.com> >> A dozen or so shorted I/O lines is unlikely to cause FPGA damage (ask >> me how I know)
>My 7i43 survived having _all_ the pins on one connector shorted to >GND. It's distressingly easy to do if you crimp the ribbon cable a bit >wrong. Apologies if it is too obvious, but some might not have seen this simple IDC cable tester. I test every cable I make now my eyes are not so good. Take a pin header with the required number of pins - one sawn out of a scrap PCB and cleaned up will do. Run a length of bare copper wire along the "even" pins and solder it to each pin. Plug in the cable to be tested. Connect one probe of a bleeping multimeter to this wire and run the other probe along the odd pins. A bleep will indicate a short which is bound to be between adjacent wires - i.e. odd and even pin. A quicker version that does not identify where the fault is, is to wire the odd pins together and have the meter across the two wires. Of course, open circuits are harder to do but less common in new cables. John Prentice ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
