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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Build for multiple speed grades

I have a design for speed grade C8. Now purchase would like to buy chips with speed grade C7. Will the binary that was build for speed grade C8 function properly in a chip with speed grade C7 ? ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Hi,

Given a given quartus_fit result, you can re-run TimeQuest for multiple speed grades by using the --speed command-line argument. In your case, you can just re-run the analysis for the "7" speed grade:

quartus_sta mydesign --speed 7

Using the GUI, you will need to manually open the "Create Timing Netlist..." dialog box ("Netlist" menu) and use the "Speed" drop down to select "7".

Hope this helps.