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AM5727的DDR3布局布线问题?

Other Parts Discussed in Thread: AM5728

我想问下 1. AM5728的DDR3地址控制线是走T点还是菊花链拓扑(目前有三个DDR芯片,其中一个Ecc用),如果是菊花链,Ecc的这颗DDR颗粒放在第一个还是第二个,还是第三个位置。如果是T拓扑,Ecc颗粒怎么放置?

2. AM5728的DDR3布线线长有要求吗?此要求可在哪里看到?