Rastergraf
General Information 1-17
1.5.2 DVI-I Connector
The DVI front panel connector is a DVI-I (analog/digital)
(
) connector. DVI uses the DVI TMDS encoded
data format, which allows longer data cables and reduces emitted noise.
Each of the three differential pairs carries nine digital video (TTL) lines. A
separate pair carries the PLL clock for the TMDS system. TMDS requires
that the length of all pairs must be closely matched. The Borealis boards
use a THine THC63DV164 DVI transmitter. Data sheets and application
notes are available on the THine web page (
).
You can access the VGA from the DVI-I connector with an adapter
(Molex 88741-8700, available from Digikey). It supplies analog video
(only) to a standard VGA connector. There is no split-off for DVI. You
can also get cables and/or adapters that provide both analog
and
digital or
just analog
or
digital.
Rastergraf strongly urges you to obtain commercially manufactured cables
and/or adapters that are available from Rastergraf, Molex, and other
suppliers. But, if you really want to roll you own, the board side connector
part number is Molex 74320-1004 with Molex 71781-0001 (or equivalent)
jackposts with Loctite. A cable that would work is Mogami W3206-8
(
http://www.mars-cam.com/ccd/mogami/digital6.html
Table 1-5 DVI-I Connector Pinout
DVI-I
Pin
Description
1
DVI_TX2L
2
DVI_TX2H
3
DVI_TX2
Shield/Ground
6
DDCCK
7
DDCDA
8
Vertical
Sync
9
DVI_TX1L
10
DVI_TX1H
11
DVI_TX1
Shield/Ground
14
Fused +5 Volts, .25A max
15
Ground
17
DVI_TX0L
18
DVI_TX0H
19
DVI_TX0
Shield/Ground
22
DVI_TXC
Shield/Ground
23
DVI_TXCH
24
DVI_TXCL
4, 5, 12, 13, 16, 20, 21
n/c
C1
Red
C2
Green
C3
Blue
C4
Horizontal Sync
C5
Analog
Ground