Hi, I am working on a Virtex4 FX design, when the system clock runs at
100MHz, the memory controller core does not work correctly. Then I inserted ChipScope trying to identify the problem, but once it is inserted, the problem is gone!I know it is of timing problem since if I lower the system clock to
50MHz, there is no problem either.It looks like that after the chipscope is inserted, somehow the routing is altered in favor of the memory controller.
I just wonder if there are any trick so that Chipscope insertion does not impact design routing?