I have a few XC95108 (-20 speed grade), PC84 package. One of them programs OK using a self designed test board and xilinx published parallel port JTAG circuit. The rest of these CPLDs dont program. Impact s/w erases them properly, but while programming, it just doesnt seem to be doing nothing. Probing the JTAG signals on the CPLD does show some activity, but the programming doesnt finish. Any tips? I have tried various cable lengths between the Dongle and the CPLD board and it doesnt help.
Thanks,
FPGANewbie