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Hi GPK,
That helps a lot. I'm thinking the constraint I had was nonsense. I changed it to:
set_output_delay -clock CLK 1.23 [get_ports {EXT_CLK}]
which also makes the unconstrained ports and paths problems go away.
Is the above constraint now correct?
If so, what does it mean in English, and how should I calculate the delay value? (I just stuck in 1.23)
If not, how should it be written?
Thanks for your patience
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Hi,
the value depends on the requirements of the receiving device. Are the data latched in with the pos- or negedge ? What is the required setup time ?
Kind regards
GPK
Honored Contributor
