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Altera_Forum's avatar
Altera_Forum
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10 years ago

set_max_skew command

I'm clocking a data bus out of my Cyclone V and want to constrain the maximum skew between data lines. I'm using; # 100 ps max skew set_max_skew -to [get_ports data_out [*]] 0.1 It seem...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Again, maybe I'm missing something, but I thought that when I apply the constraint;

set_max_skew -to [get_ports data_out[*]] 0.1

I'm telling Quartus that when it compiles the design, it should do so in a way that maintains a maximum skew between my data outputs of 100ps. If it fails to meet that criterion, then it gets reported as a timing violation, much the same as a failure to meet tSU/tH. No?