Honored Contributor
Honored ContributorThank you gee for your document it's great help!
Hi jasonkee111, Have you tried to look at this document an433 application note from altera? I think it's better than the cookbook to understand... To try to answer some of your questions: 1. The min_Tco could be put on the launch clock, or the latch clock for the previous data, it's the same constraint 2. When new data arrives your old data becomes invalid, then yes, the data invalid points to old data 3. The first representation (arrow) only takes in consideration the Tco (max) after the launch edge, the second one adds another constraint which is the hold required time after the latch edge. Another constraint means you have less time, that's why the arrow has different size... 4. No it's not that easy...What gives you the positive or negative sign is the clock edge you're looking at and the type of constraint (does data have to be there before or after the edge...??) Page 2: 1. we are trying to set output delay here, so clearly it's output pins... good luck!
