Timothy Miller wrote: >> From my work on the XC3S1500 parts, I seem to remember that Xilinx >> recommend connecting unused BRAM pins to pwr -- including the parity >> bits if they're not used. > > Is that for power-consumption purposes? I usually just leave them > unconnected. What does ISE do about unconnected I/Os? >
>From XAPP463, "Using Block RAM in Spartan-3 Generation FPGAs, page 8: Unused Inputs Tie any unused data or address inputs to logic '1'. Connecting the unused inputs High saves logic and routing resources compared to connecting the inputs Low. I'm not _sure_ what ISE does with unused IOs, but from what I've seen it _appears_ that it connects them to gnd. Can someone confirm this? HTH, Peter -- E-mail: [EMAIL PROTECTED] Website: http://www.peter-b.co.uk "If you're not part of the solution, you're part of the precipitate." _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
