Peritek VCD-V, User Manual

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Peritek
2-30 Installing Your Peritek Graphics Board
2.5.5 Digital Video Connector (VCD-V only)
The digital video connector is configured at the factory to support a variety
of different requirements.
Type 1 supports 1 pixel per clock time, up to 8
bits/pixel. Type 2 supports 2 pixels per clock, up to 4 bits/pixel.
Connection tables are shown on the next 2 pages.
The issue of whether the graphics board should source power to the panel
is somewhat controversial. This is because there is a wide variety of panels
available and some draw a considerable amount of power. Peritek
recommends that you evaluate the power requirements carefully. In
addition, some panels require controlled power sequencing. It has been
Peritek's experience that if the panel and the graphics board are powered
on and off simultaneously that additional sequence control is not required.
Nevertheless, some users feel more strongly. The VCD-V as it exists today
does not include sequenced power. An ECO procedure does exist and can
be supplied if necessary.
The next circuit revision (available 4/95) will include seq5 and
+12 sources on the digital connector. It will also include a wider video
data output path (up to 24 bits).
With respect to the Type 1 panels, since the VCD-V has an 8 bit output
port, and the human eye is least sensitive to variations in blue, the three
bits of blue available on the color panels has been reduced to two bits by
connecting B0 (LSB) and B2 (MSB) together for PX Windows
applications. If you are not using PX Windows, you are free to connect the
lines up in any way you wish. The following table shows some sample
color values.