Routing Allwinner H3 with 347 balls bga?

[Rerouter]

I thought I answered this for you last year?

DDR3 layout requirement?

Ok, Had a better look at that Allwinners pinout, and i would say definitely on 4-6 layer. Almost all the center is taken up by the grounds and power planes, meaning you have your decoupling on the far side and happy days. Leaving you with roughly 4 balls deep at any point around the chip with plenty of missing pads to allow for some routing cleverness. which would be only 2 signal layers to escape. e.g. on a 4 layer, Signal - GND - GND / Plane - Signal. you would just make sure on the 4th your s…