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.

s Video playback acceleration

— Single-pass X, Y interpolated scaling

— Hardware occlusion for three video windows

— YUV-to-RGB conversion

— Color and chroma key

— 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

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.

RDRAM

Memory Size

Screen Resolution

(Double-Buffered)

Color Depth

(Double-Buffered)

Z-Buffer

Off-Screen

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