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Spreadsheet for DDR3 Fly-by topology

Rishat , 09-24-2020, 05:19 AM

Could you please provide a DDR3 spreadsheet for Fly-by topology the same like the T-branch one from Lesson 4 of the Advanced PCB Layout Course?
robertferanec , 09-26-2020, 02:25 AM
We have spreadsheet for OpenRex: https://www.imx6rex.com/open-rex/

Here it is:

Hope this helps
Rishat , 09-27-2020, 11:07 PM
Hi Robert, thank you very much. So you say I should manually measure every net by the tool "Measure Selected Objects" to fill those cells in the spreadsheet, right? Is there any other way to fill the spreadsheet?
robertferanec , 09-28-2020, 08:26 AM
You can ... or this can be also a way to do it:
Rishat , 09-29-2020, 05:18 AM
Originally posted by robertferanec
You can ... or this can be also a way to do it:
In spite of using xSignals in length matching should I still fill the spreadsheet?
robertferanec , 09-29-2020, 06:20 AM
We do it. Simple reason is, that Altium keeps changing the algorithm what calculates the total length, spreadsheet is always the same and easy to verify.
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