--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
On Sun, Feb 5, 2017 at 9:30 PM, Internet <[email protected]> wrote: > Regarding USB C you are right that there are four differential pairs on >> the connector. However, for communication only two pairs are used because >> the USB 3.1 protocol only uses two. On the device that has a USB C >> connector you need a dedicated controller that manages the orientation of >> the plug. Then the two data lines are connected to the right pins on the >> connector through a multiplexer. The other two pairs on the connector are >> for no use in USB mode but if you want to use USB C in alternate mode (e.g. >> DisplayPort), signals can be rerouted. >> >> You can find all the information on usb.org >> <http://t224.mjt.lu/lnk/AEUAHWykN94AAAAAAAAAAGbE2wkAASHlFNUAAAAAAAZHgABYl5lfeaEfW2hMTR63ZGLMHX5RrAAGAjk/1/ZviPu0ichkU-Gm4llF2oBw/aHR0cDovL3VzYi5vcmc> >> (zip archive with full specification). >> >> This basically means that the EOMA68 standard has two differential pairs >> that are not used for USB but if your intention was to make it available >> for USB C, an internal multiplexer would be needed. >> >> argh! no, it was a misunderstanding. ha. very funny. it means i accidentally made room for 4 extra wires... which could be used to upgrade the *second* USB port to USB3.1 as well. that's frickin hilarious. l.
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