cablesserialusb
I'm trying to build a Suzy Q Cable to debug a Chromebook, but I can't get it working.
The instructions are here.
What I have tried:
Edit:
On the original cable schematic it looks like A8 and B8 is reversed?
I've used Proto Advantage with success in the past. Specifically, you could buy the 20-pin (or less) FFC-to-DIP adapter and give them a Digikey part number for an 18-pin FFC connector, and they will assemble everything and then ship it to you. The adapter boards that I received from them were nicely done.
For a length of a few inches, twisted pair or not probably won't matter - ribbon cable will likely work just fine in most environments.
For option 2, I assume you mean something like this? (though probably with both ends female)
Those cables should work fine if you can find a source in the length you need - really short ones are probably uncommon though. The fact that those cables aren't twisted for about an inch on each end is why I suspect you'd be fine without twisted pairs.
Those cables are for 2 USB ports, and are keyed so they can't be plugged in backwards - so you could use one set for your USB signal, and the other for the GPIO pins.
Best Answer
I found the problem, this breakout board is available as 'Male' and 'Female' version, the pcb silkscreen is intended for the socket version (female) so the plug version (male) is basically reversed.
The correct pinout for this specific breakout board is:
A fully working cable only needs the two resistors and the USB plug cable, additional joints for VCC/GND are not needed (at least on my device).