301467-005 Datasheet, PDF (234/426 Pages) Intel Corporation – Express Chipset

Functional Description
R
12.5.2
Intel^® SDVO Modes
The port can be dynamically configured in several modes:
• Standard. This mode provides baseline SDVO functionality. Supports Pixel Rates between
25 and 200 MP/s. Utilizes three data pairs to transfer RGB data.
• Extended. This mode adds Alpha support to data stream. Extended mode supports Pixel rates
between 25 MP/s and 200 MP/s. The mode uses four data channels and is only supported on
SDVOB. Leverages channel C (SDVOC) Red pair as the Alpha pair for channel B (SDVOB).
Note: Operating in extended SDVO mode is mutually exclusive to the use of a second display
on SDVO.
• Dual Standard. This mode uses Standard data streams across both SDVOB and SDVOC.
Both channels can only run in Standard mode (3 data pairs) and each channel supports Pixel
Rates between 25 and 200 MP/s.
⎯ Dual Independent Standard (82915G only). In Dual Independent Standard mode, each
SDVO channel will see a different pixel stream. The data stream across SDVOB will not
be the same as the data stream across SDVOC.
⎯ Dual Simultaneous Standard. In Dual Simultaneous Standard mode, both SDVO
channels will see the same pixel stream. The data stream across SDVOB will be the same
as the data stream across SDVOC. The display timings will be identical, but the transfer
timings may not be (i.e., SDVOB clocks and data may not be perfectly aligned with
SDVOC clock and data as seen at the SDVO device(s)). Since this mode uses just a
single data stream, it uses a single pixel pipeline within the GMCH.
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Datasheet