Questions about the PinePhone component list

[amosbatto]

there's only one DU and it's on the memory bus so I'm guessing it's an integrated circuit for memory
ED diodes are zener diodes used to protect circuits from back voltage
FB seems to be some sort of transciever

I figured out that "FB" is for ferrite bead. I think that "ED" stands for electrostatic discharge, which Zener diodes can be used to protect against.

Here is what I put in the wiki:

DU : Only used in the "DU1", which is an integrated circuit for memory
ED : Zener diode to protect against electrostatic discharge
FB : ferrite bead