DisplayPort pinout — 20-pin plug and receptacle
The standard full-size DisplayPort connector has 20 contacts. This reference maps the plug and receptacle views to four Main Link pairs, the AUX channel, HPD, configuration pins and DP_PWR.
Scope: This pinout covers the full-size DisplayPort connector as seen from the mating face. Mini DisplayPort and USB-C DisplayPort Alt Mode use different connectors and numbering.
Connector overview
| Property | Value |
|---|---|
| Connector | Full-size DisplayPort plug and receptacle |
| Contacts | 20 numbered contacts |
| Signals | Four Main Link pairs, AUX, HPD and configuration |
| Power | DP_PWR: auxiliary +3.3 V supply on contact 20 |
Pinout diagram
The diagram shows the mating faces. The plug and receptacle are mirrored; a solder-side or PCB view is different again. Check the connector manufacturer's drawing before wiring.
Pin assignment table
Color key : Main Link 0 · Main Link 1 · Main Link 2 · Main Link 3 · Ground · Configuration · AUX · Control · Power
| Pin | Signal | Function |
|---|---|---|
| 1 | ML_Lane 0+ | Positive conductor of Main Link lane 0 |
| 2 | GND | Ground and return for the adjacent Main Link pair |
| 3 | ML_Lane 0− | Negative conductor of Main Link lane 0 |
| 4 | ML_Lane 1+ | Positive conductor of Main Link lane 1 |
| 5 | GND | Ground and return for the adjacent Main Link pair |
| 6 | ML_Lane 1− | Negative conductor of Main Link lane 1 |
| 7 | ML_Lane 2+ | Positive conductor of Main Link lane 2 |
| 8 | GND | Ground and return for the adjacent Main Link pair |
| 9 | ML_Lane 2− | Negative conductor of Main Link lane 2 |
| 10 | ML_Lane 3+ | Positive conductor of Main Link lane 3 |
| 11 | GND | Ground and return for the adjacent Main Link pair |
| 12 | ML_Lane 3− | Negative conductor of Main Link lane 3 |
| 13 | CONFIG1 | Configuration pin 1; adapter identification depending on equipment |
| 14 | CONFIG2 | Configuration pin 2; function depends on equipment |
| 15 | AUX+ | Positive conductor of the bidirectional auxiliary channel |
| 16 | GND | AUX channel reference ground |
| 17 | AUX− | Negative conductor of the bidirectional auxiliary channel |
| 18 | HPD | Display connection detection (Hot Plug Detect) |
| 19 | RETURN | Return for the auxiliary DP_PWR supply |
| 20 | DP_PWR | Auxiliary +3.3 V supply; not intended to power a display |
Signal group roles
- Main Link : Pins 1–12 contain four differential Main Link pairs and their grounds. The lane count and data rate used depend on link negotiation between source and display.
- AUX : AUX+ and AUX− (15 and 17) form the bidirectional channel for configuration, identification and link management; pin 16 is its ground reference.
- HPD / CONFIG : HPD (18) signals display presence. CONFIG1 and CONFIG2 (13 and 14) support configuration or adapter detection depending on the hardware.
- DP_PWR : DP_PWR (20) provides limited auxiliary power, returning on pin 19. It is not the display's main power supply.
Checks before wiring
- Compare the mating-face view with the drawing for the actual plug or receptacle.
- Keep each differential pair and its return path in accordance with the component and connector guidance.
- Confirm CONFIG1/CONFIG2 behavior and DP_PWR limits in the specifications for both devices.