User manual

Kontron Compact Computers AG SMX945 Detailed Manual V1.1

3.6. Graphics Controller

The Intel 945GM Express Chipset

The GMCH IGD provides a highly integrated graphics accelerator delivering high performance 2D, 3D and

video capabilities. With its interfaces to UMA using a DVMT configuration, an analog display, a LVDS port

and two digital display ports (e.g. flat panel), the GMCH can provide a complete graphics solution.

The GMCH also provides 2D hardware acceleration for block transfers of data (BLTs). The BLT engine

provides the ability to copy a source block of data to a destination and perform raster operations (e.g.,

ROP1, ROP2 and ROP3) on the data using a pattern, and/or another destination. Performing these common

tasks with the hardware reduces the CPU load and thus improves performance.

High bandwidth access to data is provided through the system memory interface. The GMCH uses tiling

architecture to increase the system memory efficiency and thus maximize effective rendering bandwidth. The

Intel 945GME GMCH also improves 3D performance and quality with 3D Zone Rendering technology.

The GMCH has four display ports, one analog and three digital. These provide support for a progressive

scan analog monitor, a dedicated dual channel LVDS LCD panel, and two DVO devices. Each port can

transmit data according to one or more protocols. The DVO ports are connected to an external device that

converts one protocol to another. 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 data that is sent out of the display port is selected from

one of two possible sources, Pipe A or Pipe B.

3.6.1. Analog Display Port

The Intel 945GM GMCH has an integrated 400MHz, 24bit RAMDAC that can directly drive a progressive

scan analog monitor pixel resolution of up to 1600x1200 at 85Hz refresh and up to 2048x1536 at 72Hz

refresh. The analog display port can be driven by Pipe A or Pipe B.

3.6.2. Integrated LVDS Port

The Intel 945GM GMCH has an integrated dual channel LFP transmitter interface to support LVDS LCD

panel resolutions up to UXGA with center and down spread SSC support of 0.5%, 1%, and 2.5% utilizing an

external SSC clock. 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.

3.6.3. Integrated DVO Ports

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 GMCH provides two DVO ports

that are each capable of driving a 165MHz 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 330MHz 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.

4. DESCRIPTION OF THE JUMPERS

Note…

There are no jumpers on this product!