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gongmh's avatar
gongmh
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2 years ago

The question about arria10-netlength

hello, I downloaded this table(10AS032EF29_netlength.xlsx) from the official website, but there are two columns in it: Total Length (mm) and Total Delay (ps). Which data should I take as the criteri...
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AqidAyman_Altera's avatar
AqidAyman_Altera
Icon for Regular Contributor rankRegular Contributor
2 years ago

Hello,


I got some input from the internal team on this question.


This design has been routed in strip line and microstrip line routing. These two have a difference speed between them. The speed in the microstrip line is faster compared to the strip line. Thats why the ratio is not fix.


Regards,

Aqid


gongmh's avatar
gongmh
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2 years ago

hello ,

Do you mean that there are microstrip lines and strip lines inside the FPGA? So the two values are different?

My understanding is that the delay should be the same in FPGA inside, Because the routing is already established.

best wishes,

gongmh