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EMMC Tap Points

The CC uses it's EMMC module in 4-line mode. VCCQ and VCC are shorted together to 3.3v. During tapping the MCU must be powered down and/or held reset with the onboard button.

EMMC Pin Tap Point PCB Side Remarks
VCC/VCCQ Any 3v3 line, or R28 opposite pad from D3 tap point
GND The board's GND
CMD R32 Bottom The pad next to the "R"
CLK R167 Bottom The pad next to the "7"
D0 R51 BOTTOM The pad opposite from the text
D1 R53 Top the pad closer to the crystal
D2 R52 Bottom The pad opposite from the text
D3 R28 Bottom The pad toward the text

Top side traces & tap points

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Credit to thijskunst and rabirx on the OpenCentauri Discord.

Bottom side traces & tap points

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Credit to thijskunst and rabirx on the OpenCentauri Discord.