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Altera_Forum
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17 years ago

Altera PLL and SDC timing constraints for Timequest

Hi all, is it possible to export SDC scripts from a altPLL megafunction? I think in most cases it is only necessary to retype all values from the megafunction to the TimeQuest SDC script, ...
Altera_Forum's avatar
Altera_Forum
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17 years ago

Not directly from the ALTPLL MegaWizard (although not a bad idea). As Ben pointed out, derive_pll_clocks will provide this for you. You can then use the write_sdc with the -expand option to get the SDC commands into a file:

create_timing_netlist

derive_pll_clocks

update_timing_netlist

write_sdc -expand <filename>.sdc