The tide graph shows tidal movements for the current date in accordance with the current time as kept in the Timekeeping Mode.Today the VESA is announcing that they are publishing the “DisplayPort Alternate Mode on USB Type-C Connector Standard.” Working in conjunction with the USB-IF, the DP Alt Mode standard will allow standard USB Type-C connectors and cables to carry native DisplayPort signals. Timekeeping Use the Timekeeping Mode to set and view the current time and date. How to Program an IC Chip In any mode (except when a setting screen is on the display), press L to illuminate the display.
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Internally USB handles this matter via the CC sense pins, which are responsible for determining cable orientation. USB alternate modes do not encapsulate other protocols (ala Thunderbolt) but instead allocate lanes to those other signals as necessary, with muxes at either end handling the switching to determine what signals are on what lanes and where they need to come from or go. By doing so a Type-C cable is then able to carry native DisplayPort video alongside its other signals, and from a hardware standpoint this is little different than a native DisplayPort connector/cable pair.From a hardware perspective this will be a simple mux. Through the Alt Mode specification, DP Alt Mode will then in turn be allowed to take over some of these lanes – one, two, or all four – and run DisplayPort signaling over them in place of USB Superspeed signaling. USB Type-C – which immediately implies using/supporting USB 3.1 signaling – uses 4 lanes (pairs) of differential signaling for USB Superspeed data, which are split up in a 2-up/2-down configuration for full duplex communication. With USB 3.1 and Type-C the USB-IF was looking to create a single cable that could carry everything, and now that DisplayPort can be muxed over Type-C, USB is one step closer to that with the ability to carry native video.Samsung provides innovative semiconductor solutions, including DRAM, SSD, processors, image sensors with a wide-ranging portfolio of trending technologies.From a technical level the DP Alt Mode specification is actually rather simple.
DisplayPort 1.3’s HBR3 mode will be supported, but like USB’s Superspeed+ (10Gbps) mode this is officially only specified to work on cables up to 1M in length. So while adapters work over Type-C, all of them will need to be active adapters.From a cabling standpoint DP Alt Mode will have similar allowances and limitations as USB over Type-C since it inherits the physical layer. 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.
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But we’ll have to see what shipping devices are like.More broadly, this could be used to enable single-cable connectivity for laptops and tablets, with a single Type-C cable providing power to the laptop/tablet while also carrying input, audio, video, additional USB data, and more. The MUX concept is rather simple for hardware but I do get the impression that devices with multiple Type-C ports will only enable it on a fraction of their ports, hence the need for a logo for consumers to identify these ports. To that end there will even be a forthcoming identification mark (similar to DP++) that will be used to identify Type-C ports that are DP Alt Mode capable, to help consumers identify which ports they can plug their displays into. This would be a massive boon to Ultrabooks and tablets, where the former only has a limited amount of space for ports and the latter frequently only has one port at all. With the ability to carry video data over USB, this allows for devices that make use of both in a fashion similar to Thunderbolt or DockPort, but with the greater advantage of the closer cooperation of the USB-IF and the superior Type-C physical layer.At its most basic level, DP Alt Mode means that device manufacturers would no longer need to put dedicated display ports (whether DisplayPort, VGA, or HDMI) on their devices, and could instead fill out their devices entirely with USB ports for all digital I/O. Meanwhile DP Alt Mode is currently only defined to work on passive USB cables, with the VESA seemingly picking their words carefully on the use of “currently.”Because of the flexibility offered through the DP Alt Mode, the VESA and USB-IF have a wide range of options and ideas for how to make use of this functionality, with these ideas ultimately converging on a USB/DisplayPort ecosystem.
Thunderbolt development will of course be an ongoing project for Intel, however for DockPort this is basically the end of the road. More likely though we’ll see this concept first rolled out in dock form, with a single dock device connecting to an external monitor and otherwise serving as the power/data hub for the entire setup.Speaking of which, this does mean that USB via DP Alt Mode will more directly be competing with other standards such as Thunderbolt at DockPort. And since Type-C can carry DisplayPort 1.3 HBR3, this means that even when driving a display there will still be 2 lanes of USB Superspeed+ available for any devices attached to the display.
That means they’ve done quite a bit of work to future-proof the connector, including plenty of pins with an eye on supporting speeds greater than 10Gbps in the future.For that reason the possibility is on the table of ditching the DisplayPort physical layer entirely and relying solely on Type-C. In designing the Type-C connector and cabling, the USB-IF has specific intentions of having the Type-C connector live for a decade or more, just like USB Type-A/B before it. However it’s clear from today’s announcement that DisplayPort over USB has beaten USB over DisplayPort as the preferred multi-signal cabling solution, leaving DockPort with a limited duration on the market.It’s interesting to note though that part of the reason DP Alt Mode is happening – and why it’s going to surpass DockPort – is because of the Type-C physical layer.
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