Mini DisplayPort Pinout
VESA's compact 20-pin DisplayPort connector with the same signals in a smaller shell.
Overview
Mini DisplayPort (mDP) carries the identical 20-pin DisplayPort signal set - four main-link lanes, an AUX channel, hot-plug, config, and DP_PWR - in a much smaller connector introduced by Apple and adopted by VESA. It is electrically compatible with full-size DisplayPort via a passive cable.
The physical pin numbering differs from the full-size connector: the lanes, AUX, config, and ground pins are interleaved differently in the smaller shell, though the signals are functionally the same. The same mechanical connector is also used by Thunderbolt 1 and 2.
Pinout
| Pin | Name | Function | Description |
|---|---|---|---|
| 1 | GND | GND | Ground |
| 2 | Hot Plug Detect | AUDIO | Hot-plug detection |
| 3 | ML_Lane 0+ | PAIR | Main link lane 0, positive |
| 4 | CONFIG1 | SIGNAL | Configuration / cable-adapter detect |
| 5 | ML_Lane 0- | PAIR | Main link lane 0, negative |
| 6 | CONFIG2 | SIGNAL | Configuration / cable-adapter detect |
| 7 | GND | GND | Ground |
| 8 | GND | GND | Ground |
| 9 | ML_Lane 1+ | PAIR | Main link lane 1, positive |
| 10 | ML_Lane 3+ | PAIR | Main link lane 3, positive |
| 11 | ML_Lane 1- | PAIR | Main link lane 1, negative |
| 12 | ML_Lane 3- | PAIR | Main link lane 3, negative |
| 13 | GND | GND | Ground |
| 14 | GND | GND | Ground |
| 15 | ML_Lane 2+ | PAIR | Main link lane 2, positive |
| 16 | AUX_CH+ | SIGNAL | Auxiliary channel, positive |
| 17 | ML_Lane 2- | PAIR | Main link lane 2, negative |
| 18 | AUX_CH- | SIGNAL | Auxiliary channel, negative |
| 19 | GND | POWER / GND | Ground / DP_PWR return |
| 20 | DP_PWR | POWER | +3.3V power, up to 500mA |
Notes
- Same signals as full-size DisplayPort but a different physical pin layout.
- Mechanically identical to Thunderbolt 1/2 ports; sink-side reverses lane order.
Reference: VESA Mini DisplayPort Connector Standard 1.0 / PinoutGuide mDP· verified 2026-06-27