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CL-GD546X Datasheet(PDF) 2 Page - Cirrus Logic

Part # CL-GD546X
Description  64-Bit Graphics Engine with Integrated 3D Game Acceleration(CL-GD5464)
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CL-GD546X Datasheet(HTML) 2 Page - Cirrus Logic

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CL-GD546X
Laguna
™ Family VisualMedia™ Accelerators
Based on the CL-GD5462, the CL-GD5464 incorpo-
rates a 3D module, PCI bus mastering, and a newer,
230-MHz DAC. The CL-GD5464 offers very cost-
effective hardware acceleration for the latest gener-
ation of 3D games that rely heavily on texture map-
ping to achieve a dramatic experience for the end
user. The rendering performance is tuned to
Microsoft’s Direct3D game API. The CL-GD5464 is
also compatible with many other 3D game APIs on
the market.
The CL-GD5464 operates as a PCI bus master for
maximum system throughput. Use of the PCI bus
master reduces the system cost by optionally storing
texture maps, Z-buffer, and display list instructions
for 3D operation in system memory.
The CL-GD5465 also supports Intel’s AGP (acceler-
ated graphics port) for higher bandwidth between
the system memory and the graphics subsystem.
Both the CL-GD5462 and CL-GD5464 are one-
channel devices with bandwidth up to 600 Mbytes
per second. While maintaining the same pin layout,
future Laguna family members will use two Rambus
channels to increase the bandwidth to 1.2 Gbytes
per second.
FEATURES (cont.)
s Video playback acceleration
— Single-pass X, Y interpolated scaling
— Hardware occlusion for three video windows
— YUV-to-RGB conversion
— Color and chroma key
s Rambus® memory architecture
— Low-latency devices supported
— Single memory for color-buffer, Z-buffer, and texture
store
s V-Port
™ for peripheral expansion
— MPEG decoder
— TV tuner
— Teleconferencing
s Integrated VGA controller
s Integrated 230-MHz palette DAC and clock synthe-
sizer (CL-GD5462 is 170 MHz)
— Supports resolutions up to 1600
× 1200 at 85 Hz
— True-color operation up to 1024
× 768
— Hardware cursor
s DDC (display data channel) level 2B-compliant
monitor signaling
s ‘Green PC’ power-saving features support
— DPMS (display power management signaling)
— System power-down
OVERVIEW (cont.)
FEATURES/OVERVIEW
3D GRAPHICS AND VIDEO MODES (CL-GD5464)
The following table shows some of the video data formats associated with each of the graphics display
modes for the CL-GD5464.
a Additional texture maps can be stored in system memory and accessed by the CL-GD5464 bus master capability.
RDRAM
Memory Size
Screen Resolution
(Double-Buffered)
Color Depth
(Double-Buffered)
Z-Buffer
Off-Screen
Texture Memorya
1 Mbyte
640
× 480
8 bpp
Host based
> 350 Kbytes
1 Mbyte
320
× 240
16 bpp
16 bit
> 450 Kbytes
2 Mbyte
640
× 480
16 bpp
16 bit
> 150 Kbytes
2 Mbyte
640
× 480
16 bpp
Host based
> 600 Kbytes
2 Mbyte
485
× 380
16 bpp
16 bit
> 800 Kbytes


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