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Chapter 3 Hardware
XTX 820 Reference Manual 39
Table 3-19. Simplified Keyboard, Mouse, and Infrared (IrDA) Port Pin/Signal Descriptions (J3)
J3
Pin #
Signal Description
98 KBDAT Keyboard Data – This signal provides the keyboard data.
96 KBCLK Keyboard Clock – This signal provides the clocks to the keyboard.
94 MSDAT Mouse Data – This signal provides the mouse data.
92 MSCLK Mouse Clock – This signal clocks the data from the mouse.
GND Signal Ground
61 IRTX IR Transmit Data (HPSIR or ASKIR)
59 IRRX IR Receive Data (HPSIR or ASKIR)
Note: The shaded area denotes power or ground.
Video Interface
The Memory & Graphics Hub (Northbridge) chip (82915GM) provides the integrated video controller
for the CRT, LVDS, SDVO, and TV Out ports. The 82915GM video chip features are listed here and
with the specific video port on the following pages.
♦ See Table 3-20 for the CRT information.
♦ See Table 3-21 for the LVDS information.
♦ See Table 3-23 for the TV Out information.
♦ See Table 3-29 for the SDVO information.
Internal Graphics Features
• Supports up 128 MB of system memory dynamically allocated by Dynamic Video Memory
Technology (DVMT) 3.0
• Provides Intel® Dual-Frequency Graphics Technology
• Provides Intel® Smart 2D Display Technology
• Provides High Quality 3D Setup and Render Engine
• Provides High Quality Texture Engine
• Supports Dual Independent display pipes
Video Engine
• Supports Hardware Motion Compensation for MPEG2
• Provides Sub-Picture and De-interlacing support
• Provides Dynamic Bob and Weave support
• Provides Video Overlay support
CRT Interface
The CRT interface supports the following features:
• Supports maximum DAC frequency up to 400 MHz
• Supports 8-bits for each RGB DAC or 24-bit RAMDAC
• Supports up to 2048 x 1536 @ 75Hz (QXGA) and 1920 x 1080 @ 85Hz for HDTV
• Supports DDC2B compliance
Refer to Table 3-20 for the Simplified CRT Interface Pin/Signal Descriptions.