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Home FAQ about DisplayPort

FAQ about DisplayPort

Answer on questions and small facts about DisplayPort

 

Q: Who is the designer of the DisplayPort standard?

The interface is designed by VESA – Video Electronics Standards Association. This is a association that contains of NEC Home Electronics, Westeren Digital/Paradise Systems, Video 7, Tecmar, STB Systems, Renaissance GRX, Orchid Technology, Genoa Systems and ATI Technologies.Q: When where DisplayPort invented/produced?

 

Q: What is the advantages over DVI, VGA and LVDS

- Open standard for all VESA members – for free!

- Reduced EMI (Electromagnetic interference)

- up to 4 simultaneous High Resolution (1080P/60) monitors over one cable.

- Can drive displays panels directly, eliminating scaling and circuits for control. This allow thinner displays.

- Longer cables with full bandwidth (up to 33 meters)

- Transfer other type of data between monitor and computer. For example webcam/microphone.

Q: When was Displayport invented?

Designed in 2006 and produced in 2008.

Q: What is maximum data bitrate / bandwidth ?

Up to totally 17,28 Gbit per second (up to 4 lanes with 5,4Gbit per second, per lane)

Q: How many audio channels?

From 1 to 8 Channels  - 16 or 24 bit PCM.

Q: What is maximum cable length?

3meters with a passive cable, and 33 meters with active cable.

Q: Is DisplayPort compatible with VGA, HDMI or DVI?

Short answer YES.

You only need to use a small passive adapter.

PS: You can only use “single-link” HDMI/DVI when using an adapter, because of pin-limitation.

If you want to use Dual-link HDMI/DVI or the analog VGA, you need a active converter with external power.

 

Q: How do the connector looks like, and what are the pin-setup?

This is a image of the External connector for the source. PCB

DisplayPort 20 pin Connector

 

Pin 1 ML_Lane 0 (p) Lane 0 (positive)
Pin 2 GND Ground
Pin 3 ML_Lane 0 (n) Lane 0 (negative)
Pin 4 ML_Lane 1 (p) Lane 1 (positive)
Pin 5 GND Ground
Pin 6 ML_Lane 1 (n) Lane 1 (negative)
Pin 7 ML_Lane 2 (p) Lane 2 (positive)
Pin 8 GND Ground
Pin 9 ML_Lane 2 (n) Lane 2 (negative)
Pin 10 ML_Lane 3 (p) Lane 3 (positive)
Pin 11 GND Ground
Pin 12 ML_Lane 3 (n) Lane 3 (negative)
Pin 13 CONFIG1 connected to Ground1)
Pin 14 CONFIG2 connected to Ground1)
Pin 15 AUX CH (p) Auxiliary Channel (positive)
Pin 16 GND Ground
Pin 17 AUX CH (n) Auxiliary Channel (negative)
Pin 18 Hot Plug Hot Plug Detect
Pin 19 Return Return for Power
Pin 20 DP_PWR Power for connector (3.3 V 500 mA)
  1. Pins 13 and 14 may either be directly connected to ground or connected to ground through a pulldown device.
  2. This is the pinout for source-side connector, the sink-side connector pinout will have lanes 0–3 reversed in order; i.e., lane 3 will be on pin 1(n) and 3(p) while lane 0 will be on pin 10(n) and 12(p)

Standard cable: