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CL-GD5462 Datasheet(PDF) 2 Page - Cirrus Logic |
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CL-GD5462 Datasheet(HTML) 2 Page - Cirrus Logic |
2 / 3 page 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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