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mappy5's avatar
mappy5
Icon for New Contributor rankNew Contributor
3 years ago

how to set timing constraint for clock

In the case of the circuit shown in the figure, how should the timing constraint be set? Do CLK_1 and CLK_2 need timing constraints? create_clock -name {in_CLK} -period 20.0 [get_ports {in_CLK}]...
mappy5's avatar
mappy5
Icon for New Contributor rankNew Contributor
3 years ago

Is this the right way to set timing constraints on CLK_1?

create_generated_clock -name CLK_1 -source [get_registers {yyy:xxx|half_1}] -divide by 245760 [get_registers {yyy:xxx|CLK_1}]

 

  • sstrell's avatar
    sstrell
    Icon for Super Contributor rankSuper Contributor
    3 years ago

    Yes, that's the idea, though like I said, you probably have to create a clock for half_1 as well.