301467-005 Datasheet, PDF (252/426 Pages) Intel Corporation – Express Chipset

Functional Description
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Analog Content Protection
Analog content protection is provided through the external encoder using Macrovision 7.01. DVD
software must verify the presence of a Macrovision TV encoder before playback continues.
Simple attempts to disable the Macrovision operation must be detected.
Connectors
Target TV connectors support includes the CVBS, S-Video, Component, and SCART connectors.
The external TV encoder in use will determine the method of support.
12.7.2.2.4 Control Bus
Communication to SDVO registers and if utilized, ADD2 PROMs and monitor DDCs, are
accomplished by using the SDVO_CTRLDATA and SDVO_CTRLCLK signals through the
SDVO device. These signals run up to 1 MHz and connect directly to the SDVO device. The
SDVO device is then responsible for routing the DDC and PROM data streams to the appropriate
location. Consult SDVO device datasheets for level shifting requirements of these signals.
Intel^® SDVO Modes
The port can be dynamically configured in several modes:
• Standard – This mode provides baseline SDVO functionality. The mode supports pixel rates
between 25 and 200 MP/s. It uses three data pairs to transfer RGB data.
• Extended (82915G only) – This mode adds Alpha support to data stream. Extended mode
supports pixel rates between 25 MHz and 200 MP/s. The mode uses four data channels and is
only supported on SDVOB. It leverages channel C (SDVOC) Red pair as the Alpha pair for
channel B (SDVOB).
• 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. This mode is only supported on the
82915G/82915GV/82915GL/82910GL GMCH.
⎯ 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 uses just a single data
stream, it uses a single pixel pipeline within the GMCH.
12.7.3
Multiple Display Configurations
Microsoft Windows* 2000 and Windows* XP operating systems have enabled support for multi-
monitor display. Since the GMCH has several display ports available for its two pipes, it can
support up to two different images on different display devices. Timings and resolutions for these
two images may be different. The GMCH supports Intel Dual Display Clone, Intel Dual Display
Twin, and Extended Desktop.
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Datasheet