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Length match in DDR3 FLYBY (need som like virtual pin?)

Hello,

I'm relative new in Orcad and I'm working on a board with two DDR3 RAM.

Address lines have flyby termination, so I've to route traces from CPU ball to first RAM then to second one and at last to the resistor.

Here you are a hand made diagram with two lines routed

At the moment address lines are in one Match Group but this is not the right rule. I need to setup a rule like this

match addresses net from CPU to RAM1 (blu lines in my diagram)
match addresses net from RAM1 to RAM2 (red lines in my diagram)
net from RAM2 to resistor doesn't care

In Mentor programs there's Virual Pin objet for this rules but in Cadence I'm not skilled

Can anybody help me?

Thank you

Stefano

avant over 5 years ago

You can set up pin pairs in the min/max delay section.

You need to enter time or length values before exiting or the pin pairs will be lost.
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Leotordo over 5 years ago in reply to avant

tomorrow I'll try, my working day is ended

thank you

Stefano
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