How to constrain skew between multiple routes

Mike,

SDC itself does not have an easy way to do this. I believe the only way to do this with SDC proper is for you to predetermining the amount you want to allocate for the routes, and then using set_max_delay and set_min_delay to target that delay.

That said, TimeQuest has a non-SDC command that can be used to control skew across signals: set_max_skew

The following link shows the help for it:

set_max_skew help page (http://quartushelp.altera.com/11.1/master.htm#mergedprojects/tafs/tafs/tcl_pkg_sdc_ext_ver_1.0_cmd_set_max_skew.htm?gsa_pos=2&wt.oss_r=1&wt.oss=set_max_skew)