Magma Timing Issue with calculation of latency values !!

[abhi_123]

magma io latency

Hi All !!

I am using config timing adjust latency to model source latency in my design.I have a multiple clock design.
On the basis of this it calculates certain latency values (best : XXXX worst:XXXX).

My query is on what basis are these values calculated?
What is the logic/algorithm/fundamental the tool follows to calculate these.

I will be greatful for a quick reply.
Thanks in Advance,
Abhi

 

[cdic]

Re: Magma Timing Issue !!

refer to the man page for "run timing adjust latency", it's same idea as "set IO latency" in Astro/Apollo, only valuable after clock tree synthesis.

 

[spauls]

Re: Magma Timing Issue !!

Magma will take the weighted average values of cells across path to calculate latency.

 

[xworld2008]

Re: Magma Timing Issue !!

config timing adjust latency (medium, average,bundary_medium,bundary_average etc.), depend on your config,the result is different. for example, if you set as bundary_medium, latency values (best : XXXX worst:XXXX) is the medium value for insertion delay for all FF related IO.