Ok thank you very much for the reply it is very useful.
Le jeudi 30 juin 2016 15:45:28 UTC+2, Wulf Man a écrit : > http://referencedesigner.com/books/si/time-and-distance.php > > > > this can explain to you your issues > > > > > > > > On 6/30/2016 6:28 AM, Gerald Coley wrote: > > > > > 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, <larbi....@gmail.com> > 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 beagleboard...@googlegroups.com. > > 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 > > > > ger...@beagleboard.org > > http://beagleboard.org/ > > gco...@emprodesign.com > > > > > > > > > > > > -- > > 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 beagleboard...@googlegroups.com. > > 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. -- 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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/4deed23e-febb-40c4-8790-3ad961d11a5e%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
