J3
microSD
Connector
microSD socket
microSD slot
About this component
Used to boot alternative images or to run the eMMC flasher. The board's boot button selects microSD as the boot source at power-up. Unreliable SD booting is usually a card or image problem; the slot's spring contacts can also bend if a card is forced in.
What it does on this board
Bootable microSD card slot.
Pinout & readings
No pinout or reference readings yet — these show what each pin does and what a healthy part should measure.