How do i allow usb to transfer on smart switch for mac
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#How do i allow usb to transfer on smart switch for mac full
In a regular DisplayPort 1.4 cable, there are four data lines that transfer DP data at 8.1 Gbps unidirectionally this configuration is possible within a passive full featured USB Type-C to Type-C cable by configuring four USB data lines as Alt Mode and having them transfer DP data in one direction per lane, over four lanes.
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The DisplayPort protocol works a little differently where it only transfers data in one direction. Per the USB 3.2 Gen 2x2 specification, one lane can transmit up to 10 Gbps, so if both lanes are used to transmit data concurrently, this means that 20 Gbps can be transmitted and 20 Gbps can be received over the 4 lanes. The USB protocol transfers data bidirectionally, allowing it to transmit and receive data per lane from one end of the cable to the other using one positive and one negative wire each. How can the Type-C connector support full performance of DisplayPort 1.4? It has to do with how the SuperSpeed lanes are configured. Obtaining DisplayPort Performance through a Type-C Cable Additionally, CC and GND lines are also required to be available, ensuring that the USB Power Delivery protocol is available to support USB Power Delivery device operation. Even if all SuperSpeed lanes are being used for full DisplayPort performance, USB 2.0 High-Speed pins will become activated, allowing the user to obtain at least a 480 Mbps bandwidth. In either configuration, the DisplayPort Aux channel uses the SBU pins within the Type-C connector.īecause certain pins are required to be included and available for use within a Type-C cable no matter the configuration, it allows users to expect certain features including USB and video data transfer and power charging. With the recently released DisplayPort 2.0 specification and the coming soon cables, this increases to an incredible 16K x 8K at 30bpp, 60 Hz refresh, 4:4:4 HDR format with compression. If all four lanes are used to enable Alt Mode for DisplayPort, it will allow DisplayPort to operate at its full performance at up to 8K x 4K at 24bpp, 60Hz refresh, 4:2:0 format for one display, per the DisplayPort 1.4 specification. In the two lane mode, the Alt Mode for DisplayPort protocol can support 4K resolution at 60 Hz, or HDR 4K at 60 Hz using 4:2:0 and 12bpp. If USB data transmission is required, it will use two lanes, leaving the remaining two for Alt Mode, otherwise, all four lanes are available for Alt Mode. With USB 3.2, two or four of the differential high speed lanes can be used for Alt Mode. Photo by Tony Webster on Flickr Alt Mode Configuration Supports DisplayPort Protocolīecause DisplayPort signaling supports packetized data transmission like USB, enabling DP through Alt Mode on the differential SuperSpeed wires is possible. With USB specification 3.2 and the 2x2 mode, the cable can support bidirectional bandwidth of up to 20 Gbps by using two lanes simultaneously with each lane carrying 10 Gbps, thus creating a dual lane operation that can reach up to 20 Gbps. There are four differential high speed lanes – for USB there are two SuperSpeed receiver differential pairs and two SuperSpeed transmitter differential pairs, sometimes called a lane. USB Type-C cables include four pairs of SuperSpeed wires, which can be used for high speed data transfer or can be configured as Alt Mode to support third party protocols. Specifically, the DisplayPort video protocol can be configured using Alt Mode, which can be carried out over the USB Type-C standard. Inside the Type-C connector, there are 24 pins that serve a variety of functions that make these configurations possible. Inside Type-C and its SuperSpeed PairsĪ USB Type-C cable connection can act as a USB host, USB device, USB-PD power consumer, USB-PD power supplier, and as a DisplayPort video connection.
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In this article, we’ll discuss how DisplayPort protocols operate on Alt Mode over a Type-C cable and how it compares to the operation of a standard DisplayPort cable. This allows users to take advantage of multiple technologies all through a single cable, maximizing efficiency. One of Type-C’s features that allows for its flexibility is Alt Mode, which can optionally support non-USB signals including DisplayPort (DP) technology. In the world of cables, USB Type-C is considered to be the most powerful and versatile connector type to date.