DVI Connector Pinout: TMDS Data 2+ Pin

This article provides the exact pin assignment for TMDS Data 2+ within a standard Digital Visual Interface (DVI) connector. It covers the specific pin location, its operational role in the Transition-Minimized Differential Signaling (TMDS) protocol, and how it pairs with adjacent lines to deliver reliable digital video data.

Exact Pin Assignment

The exact pin number for TMDS Data 2+ on a standard DVI connector (including DVI-D and DVI-I configurations) is Pin 2.

Function and Signal Pairing

DVI uses TMDS to transmit high-speed digital video data using differential pairs. Each TMDS channel requires a positive line, a negative line, and a dedicated ground shield to reduce electromagnetic interference:

• Pin 1: TMDS Data 2- (Negative differential signal)
• Pin 2: TMDS Data 2+ (Positive differential signal)
• Pin 3: TMDS Data 2/4 Shield (Ground shield for the Data 2 pair, as well as Data 4 in dual-link connections)

Color Channel Mapping

In standard single-link RGB video transmission, the TMDS channels correspond directly to primary color data:

• TMDS Data Channel 0 (Pins 17/18): Carries the Blue color component and synchronization signals (HSync and VSync).
• TMDS Data Channel 1 (Pins 9/10): Carries the Green color component.
• TMDS Data Channel 2 (Pins 1/2): Carries the Red color component.

Therefore, Pin 2 is directly responsible for carrying the positive phase of the digital Red color channel data. If Pin 2 is damaged or disconnected, the display will typically suffer from signal loss or missing red color information.