GD7541 データシートの表示（PDF） - Cirrus Logic
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GD7541 Datasheet PDF : 4 Pages
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CL-GD7541/GD7543
Super VGA LCD Controller
OVERVIEW
The GUI-accelerated SVGA LCD controllers — CL-GD7541
and CL-GD7543 — are the latest members of the pin compati-
ble CL-GD754X family. They provide the performance and inte-
gration required for the next generation of mid-range to premium
portable computers.
The CL-GD7541/GD7543 uses Cirrus Logic’s advanced 0.6-µm
CMOS process to provide improved 3.3-V operation and sup-
port for 1024 × 768 CRT refresh rates of 70 Hz. In addition,
increased performance can be achieved through the use of
high-speed Extended-Data-Out (EDO) / Hyper-Page-Mode
DRAMs. A complete graphics subsystem can be built using only
three active components: the CL-GD7541/GD7543 and two
DRAMs.
Both the CL-GD7541 and CL-GD7543 provide the following
CL-GD7542 features: BitBLT GUI acceleration, true-color capa-
bility, support for 800 × 600 LCDs, and mixed-voltage operation
for low power consumption.
The CL-GD7543 fully supports all features of the CL-GD7542,
including MotionVideo™ Acceleration (MVA™) for playback of
Video for Windows .AVI (audio-video interleaved) files.
For the cost-sensitive value market, the CL-GD7541 provides
most of the performance and features of the CL-GD7543,
including TV-out, Feature Connector, 3D game acceleration,
and 2-Mbyte display memory. However, the CL-GD7541 does
not support the MVA hardware playback enhancements, relying
instead upon standard primary surface DCI support.
UNIQUE FEATURES
Design Flexibility
s Pin-compatible with CL-GD7542
s Big-endian byte ordering in display memory with PCI host
interface
High Performance
s BitBLT engine, color expansion, hardware cursor, linear
addressing, and 32-bit memory interface
s 32-bit local bus interface, operating at up to 33 MHz,
includes support for PCI with burst mode
s Hardware ‘pop-up’ icons
Multimedia
s 8-bit dynamic Feature Connector port
s Interface to NTSC/PAL analog encoders
s Drivers supplied for 3D-graphics libraries and emerging
APIs (advanced programming interface) for games
MVA™ (CL-GD7543 only)
s MVA™ (MotionVideo™ Acceleration)
s Multi-format frame buffer and YCrCb-to-RGB color space
conversion
s 2× hardware scaling for playback
Enhanced LCD Support
s 800 × 600 LCD support (both TFT and dual-scan STN) with
comprehensive resolution-compensation support
s Enhanced frame-rate modulation
s Intelligent dithering algorithm expands the number of bits per
primary color (RGB) on TFT or STN LCDs
Power Management
s 3.3-V, 5.0-V, or mixed-voltage support
s Hardware-initiated Standby and Suspend modes and
VESA® DPMS support for CRTs
BENEFITS
Ì CL-GD754X family offers products for a wide range of market
segments. Design knowledge gained with any CL-GD754X
device can be leveraged over entire CL-GD754X family.
Ì Supports ’X86 designs with little-endian data; supports
PowerPC™ designs with big-endian data.
Ì Accelerates GUIs such as Microsoft® Windows®; provides
high resolution and color-depth capabilities.
Ì Increases system throughput; PCI interface allows use in
’X86, PowerPC™, or other platforms.
Ì Provides hot-key display for on-screen symbols such as
battery ‘fuel gauge’ and contrast/brightness controls.
Ì Allows overlay capability for live ‘TV in a window’.
Ì Integrated design can be developed to display computer-
generated data on a TV or to record to a VCR.
Ì Supports emerging standards for DOS and Windows®-based
3D applications.
Ì Hardware enhancement for playback of Video for Windows
.AVI files.
Ì Displays separate graphics and video windows at
independent color depths.
Ì Enlarges video clips with little or no frame-rate reduction.
Ì Supports latest LCD technology and enables full use of the
display area whether in graphics or text mode.
Ì Improves display quality; increases stability of shades.
Ì Displays high- and true-color modes with smooth shading (no
contouring) on all supported LCD types.
Ì Minimizes operating power consumption; provides
manufacturing flexibility.
Ì Reduces power consumption; supports Energy Star
monitors for ‘green PC’ compliance.
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