Learning Forum

[michaelpmarquez]

How do you determine the reason why certain nets are listed in red font in the Nets panel in AED? Right clicking on them doesn't provide any information. If they were errors I would assume they would be shown when running from the main menu Layout>Nets>Select All Net Violation.

[Yang Zhao]

Hello,

The nets in Red color are Power/Ground Net. You can assign one net as a Power/Ground net by right-clicking and click "Add to Power/Ground Net"

[michaelpmarquez]

Yang thank you for the response. I have a follow up question. If the design is an imported Allegro .brd file how does AED determine which nets to automatically assign to the Power/GND nets? It doesn't seem to be based on whether the Net Type in Allegro is set to Signal vs. Power or whether the Net Class is set to PWR or None. It seems to mainly classify copper pour regions it sees in the .brd file as Power/GND but I noticed that it doesn't classify all copper pour regions as such. The only other criteria I can see is it is based on a parsing of the net name to figure out it is a power/GND net when it finds net names such as "1P3_SUPPLY_A" or "1V35" but it also seems to classify nets with names such as "SYNC", "TX1A_N", "UNNAMED..." as power/GND as well.

[Yang Zhao]

Hello Michael, when importing a brd into AEDT, the big planes with the "Poly" type are identified as "Power/Ground," and the thin traces with the "Line" type are identified as "Signal."

 

[michaelpmarquez]

Yang thanks again