Samsung DeX uses USB-C Alt Mode to output a full desktop interface to a monitor or TV. It uses DisplayPort Alt Mode combined with USB 3.0 data and USB PD power in the same cable.
| Pin | Name | Function | Type |
|---|---|---|---|
| A2 | TX1+/DP0+ | DP lane 0 positive | BUS |
| A3 | TX1-/DP0- | DP lane 0 negative | BUS |
| A10 | RX2-/DP1- | DP lane 1 negative | BUS |
| A11 | RX2+/DP1+ | DP lane 1 positive | BUS |
| B2 | TX2+/DP2+ | DP lane 2 positive | BUS |
| B3 | TX2-/DP2- | DP lane 2 negative | BUS |
| B10 | RX1-/DP3- | DP lane 3 negative | BUS |
| B11 | RX1+/DP3+ | DP lane 3 positive | BUS |
| A8 | SBU1 | DP AUX positive | BUS |
| B8 | SBU2 | DP AUX negative | BUS |
| A4 | VBUS | Power | PWR |
| A5 | CC1 | Alt mode negotiation | BUS |