Live chat suggested someone here might be able to help me troubleshoot…
I’ve been working on some custom USB C to USB A cables recently (4 pin USB 2.0 only). Finished my first cable, plugged it in with the excitement of biting into a new flavour of ice cream for the first time and… nothing. I can’t figure out where I’ve gone wrong. Perhaps someone here might be able to point me in the right direction.
Here’s the datasheet for the USB C connector I’m using. I’ve added some color coordinated lines to help with the confusing presentation of the pin mapping. 954.pdf (277.2 KB)
Here’s my novice soldering work (2 sets of USB C to A cables) :
I’ve checked for shorts using my multimeter and everything checks out.
I’ve also checked continuity from one end to the other end of the wire, as well as from the soldering pads on the USB C PCB to the pins connecting to the plug (so from C4 to A6, C5 to A7, D5 to B4/B9 etc.)
I’m at a complete loss here as to why the cable won’t work! Have I wired something wrong or is there something else I’m missing?
Update: When attempting to plug in a keyboard I get “Port Reset Failed” under the Device Manager.
The only thing I can think of is a host/device setting issue (USB C needs to be told to operate as a host or as a device end). But there are no resistors on the USB C board to switch the setting and no documentation for the part as two what it’s factory setting is.
Appreciate any guidance whatsoever!