You are using a deprecated Browser. Internet Explorer is no longer supported by Xilinx.
M1 PAR: Is there a way to prevent route-thrus?
Keywords: par, route-thru, route-through,
Is there a way to prevent route-thrus?
There is no command line option to prevent PAR from generating
route-thrus. However there are a couple of things you can
try, depending on the situation.
1 Map the logic explicitly using FMAPs, HMAPs, and location
If all combinational logic and I/O are explicitly constrained, there is less potential for generating route-thrus.
If you can pinpoint the logic associated with the route-thru,
you may be able to do this on a more limited subset of the
2 If you observe *bonded* IOBs being used as route-thrus, this
would be a bug in the software.
For XC3000 or XC5200 designs, there is a PAR patch that
corrects the problem.
Was this Answer Record helpful?