XST Question

How do I buffer a signal in XST as I feel it is getting overloaded. if I write Signal1

Reply to
Loading thread data ...

if the signal is a clock signal you can instantiate a BUFG or multiple BUFGs to optain load manual load balancing


Reply to
Antti Lukats

You can add "-max_fanout 50" (or whatever fanout you want) to the .xst-configfile or edit the appropriate GUI-form.... That setting is global, but it should be possible to pass it as an signal attribute.

         Georg Acher, acher@in.tum.de
 Click to see the full signature
Reply to
Georg Acher


Look at the constraints guide, you can set max fanout for a specific signal or you can do it globally.

Reply to
General Schvantzkoph

We are using a 20 input (each 8 bit wide) coregen instantiated MUX operating at

160 MHz on a Vitex-E device. When placed and routed in ISE6.2i, we get that the timing-error that the mux select lines are having fanout problem. We tried duplicating the net source, but still the problem persists. Any Help please.
Reply to

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.