U3
eMMC 4GB
IC
WFBGA-153
On-board flash
About this component
The default boot device on Rev C. The AM3358 ROM reads it in 4-bit mode, and Linux switches to 8-bit afterwards. A board that boots from microSD but not from eMMC is usually fixed by reflashing the eMMC from an SD-card flasher image; physical replacement of this BGA part is rarely needed. Part variants: The SRM lists two approved 4 GB parts: Micron MTFC4GLDEA-0M WT and Kingston KE4CN2H5A-A58. Earlier revisions had a smaller eMMC.
What it does on this board
Holds the default Linux image.
Pinout & readings
No pinout or reference readings yet — these show what each pin does and what a healthy part should measure.