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DisplayPort Alternate Mode for USB Type-C Announced - Video, Power, & Data All Over Type-C(2)
Nov 12, 2018

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Meanwhile since DP Alt Mode means that Type-C carries native DisplayPort signaling, this enables several different interoperability options with other Type-C devices and legacy DisplayPort devices. On the hardware side Type-C ports can be used for the sink (displays) as well as the source (computers), so one could have a display connected to a source entirely over Type-C. Otherwise simple Type-C to DisplayPort cables can be constructed which from the perspective of a DisplayPort sink would be identical to a real DisplayPort cable, with the cable wired to expose just the DisplayPort signals to the sink. Or since these cables will be bidirectional, a legacy DisplayPort source could be connected to a Type-C sink just as well.


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This also means that since DP Alt Mode is such a complete implementation of DisplayPort, that DisplayPort conversion devices will work as well. DisplayPort to VGA, DVI, and even HDMI 2.0 adapters will all work at the end of Type-C connection, and the VESA will be strongly encouraging cable makers to develop Type-C to HDMI 2.0 cables (and only HDMI 2.0, no 1.4) to make Type-C ports usable with HDMI devices. In fact the only major DisplayPort feature that won’t work over a Type-C connector is Dual-Mode DisplayPort (aka DP++), which is responsible for enabling passive DisplayPort adapters. So while adapters work over Type-C, all of them will need to be active adapters.





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