When running my Spartan-6 design with an ICAP, I receive hold violations on the pins of the ICAP.
How can I work around this?
For some recent characterization results, the input pins of the ICAP have an incorrect hold time requirement in the speed file for Spartan-6.
The hold time needs to change from 0ps to ~1200ps for LX9, LX16, LX25, LX45T, LX75T, LX100T, and LX150T devices.
The workaround is to add a LUT in the data paths that drive the ICAP.
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