Regarding section 3.5.6 Four chips T topology routing examples: the pdf shows three layers of DDR3 routing, but there is clearly a fourth layer used that isn't shown. Would it be possible to get a screenshot of the missing layer?
Generally, for all routing examples, refer to the i.MX6Q SABRE SD board PCB
design files, available as the i.MX6_SABRE_SDP_DESIGNFILES package on the NXP
web site (check the "Schematics" section):
Have a great day,
Artur
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