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ddr3 bitswap and write leveling

zagrosmega , 09-25-2017, 04:01 AM
Hi All.
Write leveling is a feature for ddr3 ram to remove skew in fly-by mode :
Is it possible to swap ddr3 x16 data bus when using tree topology for imx6 controller?

Thanks a lot.
robertferanec , 09-27-2017, 09:10 AM
Yes, you can do bit / byte swapping. Just follow the swapping rules.

For write leveling it doesn't really matter if you are using fly-by or Tree-topology. Have a look at some designs (e.g. google for iMX6 Design guide), you can use both, fly-by and tree topology and you can do the pin swapping in both cases.
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