RFHDMI over USB-C: Connection and Pinout
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This article explains how you can use an HDMI over USB-Type C cable, essentially a USB-C cable that outputs an HDMI signal. This lets you connect smart devices like tablets, smartphones, and laptops to various types of displays.
HDMI: High Definition Multimedia Interface
Figure 1 shows a typical HDMI to USB converter application.
HDMI Over USB-C
Here are some key features of the HDMI connector interface:
- Supports both compressed and uncompressed digital audio, as well as uncompressed video.
- Supports popular audio formats such as DTS and Dolby.
- Handles video formats like 720p, 1080i, 1080p, and 480p.
- Compatible with NTSC and PAL standards.
- Allows for 8 channels of uncompressed audio with different sample sizes (16-bit, 20-bit, 24-bit) and sampling rates from 32 KHz to 192 KHz.
As shown in Figure 1, you can connect HDMI-supported source devices like PC monitors, projectors, and TV monitors to USB Type-C compliant devices like laptops, smartphones, desktops, and tablets.
HDMI Pin Diagram and Description
Figure 2 shows the HDMI connector of Type-A.
The following table details the pin designations for the HDMI Type-A connector (width: 13.9 mm, Height: 4.45 mm):
HDMI connector
| Pin Number | Designation |
|---|---|
| 1 | TMDS Data 2+ |
| 2 | TMDS DATA 2 Shield |
| 3 | TMDS Data 2- |
| 4 | TMDS Data 1+ |
| 5 | TMDS Data 1 Shield |
| 6 | TMDS Data 1- |
| 7 | TMDS Data 0+ |
| 8 | TMDS Data 0 Shield |
| 9 | TMDS Data 0- |
| 10 | TMDS Clock+ |
| 11 | TMDS Clock Shield |
| 12 | TMDS Clock- |
| 13 | CEC |
| 14 | No connection |
| 15 | DDC Clock |
| 16 | DDC Data |
| 17 | Ground |
| 18 | +5V Power |
| 19 | Hot Plug Detect |
There are other types of HDMI connectors, including Type C (width: 10.42 mm, Height: 2.42 mm) and Type D (Width: 6.4 mm, Height: 2.8 mm).
In the table, TMDS stands for Transition Minimized Differential Signaling. This technology is used for high-speed serial data communication and employs the 8b/10b encoding technique.
USB Type-C Plug Pin Diagram
USB Type-C Plug Connector Interface
Figure 3 depicts the pins of a USB Type-C Plug. For more detailed information, refer to articles specifically about the USB Type-C interface.
