Rastergraf Topaz, User Manual

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Rastergraf
1-20 General Information
1.6.4 Flat Panel Displays
The graphics boards support 24-bit-per-pixel Flat Panel displays with
either dual LVDS channels (1024 x 768 max) or using an external encoder
connected to the Digital Out (see figure above), a single DVI channel
(optional on Tropos and Duros). LVDS is available only via the PMC Pn4
rear panel I/O connector for all boards except Topaz, which has a front
panel connector option as well.
1.6.4.1 DVI
The Topaz/Stratus/Garnet (optional on Tropos/Duros) is supplied with a
DVI compliant transmitter. It provides high quality 24-bit true color
digital output over twisted pair cables up to 3 meters in length. This length
may be increased by using shielded twin-ax or fiber-optic cables. Displays
ranging up to 1600 x 1200 are supported when best quality cables are
used.
The DVI serializer is driven by the “Flat Panel” display controller section
of the SM731. Three TMDS data channels send data at 1.65 Gbps per
channel. Connections are made either through the front panel DVI-I
connector or the rear panel I/O (PMC Pn4) as specified at order time.
Figure 1-14 DVI Flat Panel Output Block Diagram
1.6.4.2 LVDS
The LVDS interfaces can be used to drive two independent panels, one
displaying data from the Primary controller and the other displaying data
from the Secondary controller. They can also be combined to drive a
single, two pixels per clock, high-resolution panel. Each LVDS block
compresses 24 bits of RGB data and 4 bits of LCD timing into four
differential wire pairs, up to 392 MB per second at a maximum clock rate
of 112 MHz. A fifth differential pair transmits the interface clock. This