Dvi - Compaq 8000 - Elite Convertible Minitower PC Introduction Manual

NOTE: The above pinout refers to the VESA DDC (Display Data Channel) version of the VGA connector, which is
currently the most widely used. It is identified by the blue color of the center part of the receptacle.

DVI

The Digital Visual Interface, or DVI, standard was published by the Digital Display Working Group
(DDWG) in 1999. The DDWG was an ad-hoc consortium of seven PC-industry companies – HP, Compaq,
Intel, IBM, NEC, Fujitsu, and Silicon Image (the developer of the Transition Minimized Differential
Signaling or TMDS electrical interface on which the standard was based). DVI became the first
reasonably-successful digital display interface for PC monitors. However, the DDWG group has not met
for over five years, and may be considered defunct. Further development of the DVI specification is not
expected.
DVI is available in two forms: DVI-I, which includes both a VGA-compatible set of analog video signals
and a digital interface, and DVI-D, which is digital-only. The digital interface may provide either one or
two links, depending on the data capacity needed. In DVI parlance, a single link consists of three
differential data pairs and a clock pair, and provides 4.8 Gbits/second of raw data capacity. Dual-link
versions of either DVI add three additional data pairs, for 9.6 Gbits/sec. total capacity. DVI-I and DVI-D
may be distinguished by the four-pin Microcross™ section which carries the analog video signals; it is not
present in DVI-D implementations.
DVI is currently the most popular digital interface for monitors, and will likely continue in use for several
more years. However, due to the size and relatively high cost of the connector, it is now expected to lose
PC market share to the newer DisplayPort standard, and has already been virtually replaced in the CE/
TV market by HDMI.
Figure 3 DVI-D Connector
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