You use the PCB SW tools to give you the lengths of each trace. The distance from one layer to the next is not that significant and is well within the needed tolerance.
Gerald On Sat, Jun 25, 2016 at 6:16 PM, <[email protected]> wrote: > Hello, > > I am designing my own board based on the am3358 and one ddr3 chip. I > looked at the bbb project to have a example of layout and i have a question > about length matching for the ddr3 interface. How the length matching has > been done if different layers are used? The signal on the outer layers > doesnt travel at the same speed as the inner layers. > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/0f800b4e-6e8d-4e20-962d-7efb1d709ec2%40googlegroups.com > . > For more options, visit https://groups.google.com/d/optout. > -- Gerald [email protected] http://beagleboard.org/ [email protected] -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAHK_S%2Be0PNUqUP1v48RB0NYGMapggiESACpxC5-jg9uKH34HcA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
