4 Resolution and refresh frequency limits.3.1.2 Cable bandwidth and certifications.3.1.1 Compatibility and feature support.Active VGA adapters are powered by the DisplayPort connector directly, while active dual-link DVI adapters typically rely on an external power source such as USB. For analog VGA/ YPbPr and dual-link DVI, a powered active adapter is required for compatibility and does not rely on dual mode. This adapter enables compatibility mode and converts the signal from 3.3 to 5 volts. However, dual-mode DisplayPort ports are designed to transmit a single-link DVI or HDMI protocol ( TMDS) across the interface through the use of an external passive adapter. The DisplayPort interface uses an LVDS signal protocol that is not compatible with DVI or HDMI. In addition, the interface is capable of carrying bi-directional USB signals. A bi-directional, half-duplex auxiliary channel carries device management and device control data for the Main Link, such as VESA EDID, MCCS, and DPMS standards. The video signal path can range from six to sixteen bits per color channel, and the audio path can have up to eight channels of 24-bit, 192 kHz PCM audio that is uncompressed. ĭisplayPort can be used to transmit audio and video simultaneously, although each is optional and can be transmitted without the other. The use of data packets also makes DisplayPort extensible, meaning additional features can be added over time without significant changes to the physical interface. This allows for higher resolution using fewer pins. It permits the use of internal and external display connections, and unlike legacy standards that transmit a clock signal with each output, the DisplayPort protocol is based on small data packets known as micro packets, which can embed the clock signal within the data stream. The interface is backward compatible with other interfaces, such as HDMI and DVI, through the use of either active or passive adapters.ĭisplayPort is the first display interface to rely on packetized data transmission, a form of digital communication found in technologies such as Ethernet, USB, and PCI Express. ĭisplayPort was designed to replace VGA, FPD-Link, and Digital Visual Interface (DVI). The interface is primarily used to connect a video source to a display device such as a computer monitor, and it can also carry audio, USB, and other forms of data.
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and 30/20 pins for internal connections between graphics engines and built-in flat panels.ġ.62, 2.7, 5.4, 8.1, or 20 Gbit/s data rate per lane 1, 2, or 4 lanes (effective total 5.184, 8.64, 17.28, 25.92, or 77.37 Gbit/s for 4-lane link) 2 or 720 Mbit/s (effectively 1 or 576 Mbit/s) for the auxiliary channel.Ī Mini DisplayPort receptacle (center), with a Thunderbolt 3 port (left) and power input (right)ĭisplayPort ( DP) is a digital display interface developed by a consortium of PC and chip manufacturers and standardized by the Video Electronics Standards Association (VESA). Optional, maximum resolution limited by available bandwidthĢ0 pins for external connectors on desktops, notebooks, graphics cards, monitors, etc. Optional 1–8 channels, 16 or 24-bit linear PCM 32–192 kHz sampling rate maximum bitrate 36,864 kbit/s (4,608 kB/s)
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