Forum Discussion

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

What is micro Setup time?

Can anyone please explain what "micro setup time [uTsu]" means. Thanks, AA
HTork's avatar
HTork
Icon for New Contributor rankNew Contributor
6 years ago

Continuing on this really old thread.

The is the information I get on setup slack in TimeQuest.

As you can see, micro setup time [uTsu], is added to the data required path, making the setup slack larger, not smaller.

Isn't this in contradiction to what is mentioned above.

Hope for some help to clearify this.

sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
6 years ago

uTsu is the silicon-based setup timing requirement. It is the latest time before the clock edge that the data must arrive. Look in the Waveform tab to see how it is used to designate the data required time. The timing report you've posted shows the latest data must arrive, taking uTsu into account, and based on the clock edge arriving at the destination register. Normally, I see this value as negative since it should be subtracted from when the clock arrives to calculate the required time. I'm not sure why it's positive in the screenshot. Can you post the waveform tab?

#iwork4intel