Introduction
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Automatic discovery, negotiation, and training of link out of reset
Supports traditional PCI style traffic (asynchronous snooped, PCI ordering)
Supports traditional AGP style traffic (asynchronous non-snooped, PCI Express-
relaxed ordering)
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Hierarchical PCI-compliant configuration mechanism for downstream devices (i.e.,
normal PCI 2.3 Configuration space as a PCI-to-PCI bridge)
Supports “static” lane numbering reversal. This method of lane reversal is
controlled by a Hardware Reset strap, and reverses both the receivers and
transmitters for all lanes (e.g., TX[15]->TX[0], RX[15]->RX[0]). This method is
transparent to all external devices and is different than lane reversal as defined in
the PCI Express Specification. In particular, link initialization is not affected by
static lane reversal.
1.3.5
Graphics Features
The GMCH provides an integrated graphics device (IGD) delivering cost competitive
3D, 2D and video capabilities. The GMCH contains an extensive set of instructions for
3D operations, 2D operations, motion compensation, overlay, and display control. The
GMCH’s video engines support video conferencing and other video applications. The
GMCH uses a UMA configuration with up to 256MB of DVMT for graphics memory. The
GMCH also has the capability to support external graphics accelerators via the PCI
Express Graphics (PEG) port but cannot work concurrently with the integrated
graphics device. High bandwidth access to data is provided through the system
memory port.
1.3.6
SDVO and Analog Display Features
The GMCH provides interfaces to a progressive scan analog monitor and two SDVO
ports. For the GMCH, the SDVO ports are multiplexed with PCI Express x16 graphics
port signals. The GMCH supports two multiplexed SDVO ports that each drive pixel
clocks up to 270 MHz. The SDVO ports can each support a single-channel SDVO
device. If both ports are active in single-channel mode, they can have different display
timing and data.
The digital display channels are capable of driving a variety of SDVO devices (e.g.,
TMDS, TV-Out). Note that SDVO only works with the Integrated Graphics Device
(IGD). The GMCH is capable of driving an Advanced Digital Display (ADD2) card or
Media Expansion Card. The Media Expansion Card adds video-in capabilities. The
GMCH is compliant with DVI Specification 1.0. When combined with a DVI compliant
external device and connector, the GMCH has a high-speed interface to a digital
display (e.g., flat panel or digital CRT).
The GMCH is compliant with HDMI specification 1.1. When combined with a HDMI
compliant external device and connector, the external HDMI device can support
standard, enhanced, or high-definition video, plus multi-channel digital audio on a
single cable.
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Datasheet
INTEL [ INTEL ]
