Aaeon ECM-5716 Series User Manual page 21

User' s Manual
The Intel 855GM/855GME GMCH have an integrated dual channel LFP Transmitter
interface to support LVDS LCD panel resolutions up to UXGA The display pipe provides
panel up-scaling to fit a smaller source image onto a specific native panel size, as well as
provides panning and centering support. The LVDS port is only supported on Pipe B. The
LVDS port can only be driven by Pipe B, either independently or simultaneously with the
Analog Display port. Spread Spectrum Clocking is supported: center and down spread
support of 0.5%, 1%, and 2.5% utilizing an external SSC clock.
The DVO B/C interface is compliant with the DVI Specification 1.0. When combined with a
DVI compliant external device (e.g. TMDS Flat Panel Transmitter, TV-out encoder, etc.),
the GMCH provides a high-speed interface to a digital or analog display (e.g. flat panel,
TV monitor, etc.). The DVO ports are connected to an external display device. Examples
of this are TV-out encoders, external DACs, LVDS transmitters, and TMDS transmitters.
Each display port has control signals that may be used to control, configure and/or
determine the capabilities of an external device. The GMCH provides two DVO ports that
are each capable of driving a 165-MHz pixel clock at the DVO B or DVO C interface.
When DVO B and DVO C are combined into a single DVO port, then an effective pixel
rate of 330 MHz can be achieved. The DVO B/C ports can be driven by Pipe A or Pipe
B. If driven on Pipe B, then the LVDS port must be disabled.
The ICH4 is a highly integrated multifunctional I/O Controller Hub that provides the
interface to the PCI Bus and integrates many of functions needed in today' s PC platform.
The GMCH and ICH4 communicate over a dedicated hub interface. The 82801DB ICH4
functions and capabilities include:
PCI Rev. 2.2 compliant with support for 33MHz PCI operations
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Supports up to 6 Request/Grant pairs (PCI slots)
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Power management logic support
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Enhanced DMA controller, interrupt controller, and timer functions
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Integrated IDE controller; Ultra ATA/100/66/33
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USB host interface; 3 host controllers and supports 6 USB ports; includes a EHCI
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high-speed 2.0 USB controller
Integrated LAN controller
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System Management Bus (SMBus) compatible with most IC devices; ICH4 has both
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bus master and slave capability
AC ' 97 2.3 compliant link for audio and telephony codecs; up to 6 channels
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Low Pin Count (LPC) interface
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FWH Interface (FWH Flash BIOS support)
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Alert on LAN* (AOL and AOL2)
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8 ECM-5716 Series User' s Manual