So fyi, there are only three wires on this lead. There is the braided outer, a nice thick red wire, and a little green wire.
the source (PSU) has a pull-up resistor on CC1/CC2
the sink (rpi) has a pull-down on CC1/CC2
the C<->C cable has a CC wire connecting CC1 on both sides
the e-marked C<->C cables have an active chip that is powered by the CC2 pin from both ends, and has a pulldown
if you plug the usb-c in backwards, the CC1/CC2 are swapped
the pi5 PSU has the cable permanently attached, so the CC1/CC2 cant be swapped on that end
its not an e-marked cable, so the red path is missing, and that leaves CC2 unconnected
so the green wire youve found, is the CC wire, that is expecting a pull-down on the sink end
requesting higher voltages/currents (above the default 3A) requires a digital protocol on that CC wire
Statistics: Posted by cleverca22 — Mon Feb 12, 2024 3:20 pm