General > General Technical Chat
Inside USB-C Cables
SiliconWizard:
--- Quote from: coppercone2 on March 25, 2024, 07:05:14 am ---does anyone else want a phone with banana jacks on it instead of this crazy cable??? The 2mm banana jacks would work here OK, or even a recessed binding post, so you can stick a wire in there
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Only if it can be used as a small lab power supply. ;D
tom66:
--- Quote from: tooki on March 24, 2024, 11:02:29 am ---There shouldn’t be. The USB-C standard requires a “channel configuration” chip to be present.
And it makes sense, because the pins can be used very differently depending on what the application is. USB 2 doesn’t need the high-speed lines, USB 3.0 uses the high-speed lines with twisted pair wiring, USB 3.1 uses them with micro-coaxial cables, and I don’t know what DisplayPort mode actually requires…
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Are you sure a chip is required? To make a charging or USB data cable, we just use a resistor (5.1k) from CC to GND.
Someone:
--- Quote from: tom66 on March 25, 2024, 09:52:10 am ---
--- Quote from: tooki on March 24, 2024, 11:02:29 am ---There shouldn’t be. The USB-C standard requires a “channel configuration” chip to be present.
And it makes sense, because the pins can be used very differently depending on what the application is. USB 2 doesn’t need the high-speed lines, USB 3.0 uses the high-speed lines with twisted pair wiring, USB 3.1 uses them with micro-coaxial cables, and I don’t know what DisplayPort mode actually requires…
--- End quote ---
Are you sure a chip is required? To make a charging or USB data cable, we just use a resistor (5.1k) from CC to GND.
--- End quote ---
Yes, passive cables are A-OK for some modes. But the usual suspects are muddying the waters and pretending like everyone only wants a bleeding edge "full featured" cable:
https://en.wikipedia.org/wiki/USB-C
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