2. Technical Information

Here is the design and pinout arrangement of the HDMI interface.

Pin 1 - TMDS Data2+
Pin 2 - TMDS Data2 Shield
Pin 3 - TMDS Data2-
Pin 4 - TMDS Data1+
Pin 5 - TMDS Data1 Shield
Pin 6 - TMDS Data1-
Pin 7 - TMDS Data0+
Pin 8 - TMDS Data0 Shield
Pin 9 - TMDS Data0-
Pin 10 - TMDS Clock+
Pin 11 - TMDS Clock Shield
Pin 12 - TMDS Clock-
Pin 13 - CEC
Pin 14 -Reserved (N.C. on device)
Pin 15 - SCL
Pin 16 - SDA
Pin 17 - DDC/CEC Ground
Pin 18 - +5 V Power
Pin 19 - Hot Plug Detect

LEGEND

TMDS (Transition-Minimized Differential Signaling): A technology for transmitting high speed data used in the HDMI and DVI interfaces. Consists of three channels that carry audio/video and auxiliary data, which are capable of 3.4 Gps throughput per channel. CEC (Consumer Electronics Control): Allows the communication of control and command signals between any participating connected components. CEC features are built in at the manufacturer's discretion - if you have all HDMI CEC-enabled components connected, you would be able to send commands to all components with the touch of one remote control button. Commands include Power On/Off, Play, System Standby, Record, and more. SCL (Serial Data Clock): Synchronizes data transfer SDA (Serial Data Access): Transfers data. DDC (Display Data Channel): Allows the communication of display specifications and capabilities, such as manufacturer name, product type, supported audio/video formats and resolutions, etc.

Supported Formats

All primary video formats are currently supported, including PAL, NTSC, ATSC and others. Video resolution goes up to 1440p or 2560x1440 progressive (Blu-ray and HD-DVD currently offer 1080p). Color is 48-bit (over 280 trillion colors) with a refresh rate up to 120 Hz.

Supported audio formats include:
Compressed audio - Dolby Digital, DTS, and so forth.
Multi-Channel Audio - SACD, DVD Audio
Uncompressed (PCM) - Up to 8 channels with 24-bit sampling rates @ 192 kHz
Lossless - Recently added support for Dolby TrueHD and DTS-HD Master Audio