Forum Discussion
Altera_Forum
Honored Contributor
12 years agoThat I can only speculate.
My impression is that, in general, FPGA tools work with a "gate level" representation of the circuit which mashes up the physical delay into abstractions. And as a result, they end up doing/having to do weird things. I have to admit I have considerably more difficulty following TQs path information than I have with IC tools. I was only taking issue with the concept that Tsu/Th are always negative by convention.