Micro-HDMI Pinout
The smallest HDMI connector (Type D) carrying all 19 HDMI signals in a micro-USB-sized shell.
Overview
Micro-HDMI (Type D) is the most compact HDMI connector, common on action cameras, drones, and tablets. It carries the full 19-pin HDMI signal set - three TMDS data pairs, a TMDS clock pair, DDC, CEC, HEAC/utility, hot-plug, and +5V - identical in function to full-size Type A.
Although the signals match Type A, the physical pin numbering is completely rearranged to fit the small shell, so Type D cannot mate with other HDMI types without an adapter. It supports the same resolutions and HDMI features as the standard connector.
Pinout
| Pin | Name | Function | Description |
|---|---|---|---|
| 1 | Hot Plug Detect / HEAC- | GND / AUDIO | Hot-plug detect, doubles as HEAC- (HDMI Ethernet/audio return) |
| 2 | Utility / HEAC+ | SIGNAL | Reserved utility line, doubles as HEAC+ |
| 3 | TMDS Data2+ | PAIR / VIDEO / DATA | TMDS data channel 2, positive |
| 4 | TMDS Data2 Shield | GND / PAIR / VIDEO / DATA | Shield for TMDS data channel 2 |
| 5 | TMDS Data2- | PAIR / VIDEO / DATA | TMDS data channel 2, negative |
| 6 | TMDS Data1+ | PAIR / VIDEO / DATA | TMDS data channel 1, positive |
| 7 | TMDS Data1 Shield | GND / PAIR / VIDEO / DATA | Shield for TMDS data channel 1 |
| 8 | TMDS Data1- | PAIR / VIDEO / DATA | TMDS data channel 1, negative |
| 9 | TMDS Data0+ | PAIR / VIDEO / DATA | TMDS data channel 0, positive |
| 10 | TMDS Data0 Shield | GND / PAIR / VIDEO / DATA | Shield for TMDS data channel 0 |
| 11 | TMDS Data0- | PAIR / VIDEO / DATA | TMDS data channel 0, negative |
| 12 | TMDS Clock+ | PAIR / VIDEO / CLK | TMDS clock, positive |
| 13 | TMDS Clock Shield | GND / PAIR / VIDEO / CLK | Shield for the TMDS clock pair |
| 14 | TMDS Clock- | PAIR / VIDEO / CLK | TMDS clock, negative |
| 15 | CEC | SIGNAL | Consumer Electronics Control |
| 16 | DDC/CEC/HEAC Ground | GND / I2C | Ground for DDC, CEC and HEAC |
| 17 | SCL | I2C / CLK | DDC clock (I2C SCL) |
| 18 | SDA | I2C / DATA | DDC data (I2C SDA) |
| 19 | +5V Power | POWER | +5V power |
Notes
- Type D pin numbering differs from Type A and Type C; signals are functionally identical.
- HEAC (HDMI Ethernet and Audio Return Channel) shares pins 1, 2 and 14 region depending on mode.
Reference: HDMI Specification (Type D) / PinoutGuide Micro-HDMI· verified 2026-06-27