Intel BX80646I74770 HDMI Source, HDMI Sink, HDMI* Overview, HDMI Tx, HDMI Rx, Hot-Plug Detect

December 2013 Order No.: 328897-004

Processor—Interfaces

make up the TMDS data and clock channels. These channels are used to carry video, audio, and auxiliary data. In addition, HDMI carries a VESA DDC. The DDC is used by an HDMI Source to determine the capabilities and characteristics of the Sink.

Audio, video, and auxiliary (control/status) data is transmitted across the three TMDS data channels. The video pixel clock is transmitted on the TMDS clock channel and is used by the receiver for data recovery on the three data channels. The digital display data signals driven natively through the PCH are AC coupled and needs level shifting to convert the AC coupled signals to the HDMI compliant digital signals.

The processor HDMI interface is designed in accordance with the High-Definition Multimedia Interface with 3D, 4K, Deep Color, and x.v.Color.

Figure 8. HDMI* Overview

HDMI Source	HDMI Sink
HDMI Tx	HDMI Rx
	TMDS Data Channel 0
	TMDS Data Channel 1
	TMDS Data Channel 2
	TMDS Clock Channel
	Hot-Plug Detect
	Display Data Channel (DDC)
	CEC Line (optional)

Digital Video Interface

The processor Digital Ports can be configured to drive DVI-D. DVI uses TMDS for transmitting data from the transmitter to the receiver, which is similar to the HDMI protocol except for the audio and CEC. Refer to the HDMI section for more information on the signals and data transmission. To drive DVI-I through the back panel the VGA DDC signals are connected along with the digital data and clock signals from one of the Digital Ports. When a system has support for a DVI-I port, then either VGA or the DVI-D through a single DVI-I connector can be driven, but not both simultaneously.

The digital display data signals driven natively through the processor are AC coupled and need level shifting to convert the AC coupled signals to the HDMI compliant digital signals.

Desktop 4th Generation Intel® Core™ Processor Family, Desktop Intel® Pentium® Processor Family, and Desktop Intel® Celeron® Processor Family

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