User guide

User Guide CC3-CAJUN • Low Power CompactPCI CPU
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 Hamm • Germany
Tel. [phone] • Fax. [phone] • [e-mail] • www.ekf.com
Graphics Subsystem
The graphics subsystem is part of the Intel 82815 Graphics/Memory Controller Hub (GMCH),
supporting the following features:
C 3-D Hyper Pipelined architecture
C Full 2-D hardware acceleration
C Motion video acceleration
C 3-D graphics visual and texturing enhancements
C Integrated 24-bit 230MHz RAMDAC
C DDC2B compliant
C Hardware motion compensation for software MPEG2 decode
C Integrated graphics memory controller
The CC3-CAJUN is provided with the DVI-I graphics connector. This is both, a digital and analog
interface. Recent digital input flat-panel displays are widely available with this connector style
(e.g. the NEC Mitsubishi Ambix series, or the Samsung Syncmaster series 193T/213T/214T). For
classic monitors, adapters or adapter cables can be used for converting from DVI-I to the 15-pin
HD D-SUB connector.
A special display transmitter chip is used for serializing/deserializing the differential DVI signals.
The SiI164 (Silicon Image) transmitter uses PanelLink® Digital technology to support displays
ranging from VGA to UXGA resolutions (25 - 165Mpps) in a single link interface. The SiI164
transmitter has a highly flexible interface with 12-bit (½ pixel/clock) or 24-bit (1 pixel/clock)
input for true color (16.7 million) support. It can be foreseen, that DVI will overcome the legacy
analog and proprietary digital interfaces in the near future.
The GMCH supports several video resolutions and refresh rates. A partial list is contained in the
table below. Please note, that flat-panel displays should be operated with their maximum
resolution at 60Hz refresh rate.
i815 GMCH Video Modes and Clock Rates (Partial List)
Resolution/
Refresh Rate
60Hz 70Hz 72Hz 75Hz 85Hz
640x480 25.175MHz 28MHz 31.5MHz 31.5MHz 36MHz
800x600 40MHz 45MHz 50MHz 49.5MHz 56.25MHz
1024x768
65MHz
75MHz - 78.75MHz 94.5MHz
1152x864 80MHz 96MHz 99MHz 108MHz 121MHz
1280x1024
108MHz
128.89MHz 132MHz 135MHz 157.5MHz
1600x1200 162MHz 189MHz 195MHz 202.5MHz 229.5MHz
Video modes marked italic/blue: Suitable for popular flat-panel displays