TeDaDeS
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ED posted this:12mA is what the rotator chip can consume from it's power line voltage.What I ment by "it's not that much" is I assume even a tiny trace can handle 12mA. So I assume they are trying to keep the traces as small as possible and the fab might have issues having good quality at that low pitch. But I'm only speculating what the cause could be that it's required to use a larger pitch trace.
That says nothing about the actual signal strength coming in and going out. I suspect those may have needed to be wider traces to decrease signal weakening as it's going through this bit-sorting-rotation chip instead of straight to a display?
"Apparently the LCD cable and some traces were too thin for the power needed, which was a good guess."
So the question would be, how small are the traces that they couldn't handle 12mA. Pretty small or the fab couldn't accurately produce this kind of small pitch.