GD7541 データシートの表示（PDF） - Cirrus Logic

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GD7541

(CL-GD7541 / CL-GD7543) SVGA LCD Controller / GUI Accelerated

Cirrus Logic 

CL-GD7541/GD7543

Preliminary Product Bulletin

FEATURES

s Single-chip Super VGA LCD controller

— Pin compatible with CL-GD7542

— IBM® VGA hardware-compatible

s GUI acceleration

— BitBLT (bit block transfer) engine

— Color expansion for 8- or 16-bit pixels

— True packed-pixel addressing for 8 and 16 bpp

— Programmable linear memory addressing

— 32 × 32 or 64 × 64 hardware cursor

s Multimedia acceleration and enhancement

— 8-bit feature connector port for video overlay

— Interface to analog encoders for NTSC/PAL-out

— MVA™ (MotionVideo™ Acceleration) CL-GD7543 only

q True-color, full-motion video playback

q Multi-format frame buffer

q Integrated YCrCb: RGB color space converter

q 2× horizontal/vertical hardware scaling

s 32-bit direct-connect CPU host bus interfaces

— ’486 CPU local bus (up to 50 MHz @ 5 V)

— VESA® VL-Bus™

— PCI system bus with burst support: big-endian byte-

order hardware support for PowerPC™

s Scalable 1- and 2-Mbyte display memory

— Two or four 256K × 16 DRAMs, or four 512K × 8 DRAMs

— Extended-Data-Out/Hyper-Page-Mode DRAM support

s Integrated programmable frequency synthesizer

— Core VCLK up to 80 MHz @ 5 V; 77 MHz @ 3.3 V

— Core MCLK up to 60 MHz @ 5 V; 50 MHz @ 3.3 V

— Vertical refresh rates up to 75 Hz (depending on the

graphics mode, MCLK, and voltage level of core VCC)

GUI-Accelerated

SVGA LCD Controller

for Portable Computers

s 64 × 64 pixel size hardware pop-up icons

— Displays up to four independently controlled, 4-color icons

s Integrated 24-bit true-color RAMDAC

— 640 × 480 non-interlaced, 16M colors (CL-GD7543 only)

— 800 × 600 non-interlaced, 64K colors

— 1024 × 768 non-interlaced, 256 colors

— 1280 × 1024 interlaced, 256 colors

s Support for 640 × 480 and 800 × 600 LCDs

— Dual-scan color and monochrome STN LCDs

— Color TFT LCDs (9-, 12-, 18-, and 24-bit interfaces)

— Dithering algorithm automatically adds up to 6 bits per

primary color without decreasing spatial resolution

— Enhanced frame-rate modulation algorithm improves

display quality with fast-response STN LCDs (~100 ms)

— SimulSCAN™ (simultaneous CRT and LCD)

— Full-screen VGA support on 800 × 600 LCDs

s Power-management capabilities

— 3.3-V, 5.0-V, and mixed-voltage operation

— Hardware-suspend input pin or software-suspend option

— Self-refresh DRAMs or DRAM refresh via 32-kHz clock

— Internal timers for Standby mode and backlight control

— LCD power sequencing

— VESA® DPMS (Display Power Management Signaling)

— DDC-1 (Display Data Channel) support

s EIAJ standard 208-pin quad flat package

System

Block Diagram

3.3 or 5 V

256K × 16

DRAM

3.3 or 5 V

CL-GD7541

or

CL-GD7543

208-Pin PQFP

Analog

Encoder

3.3 or 5 V

STANDARD TV

3.3 or 5 V

3.3 or 5 V

REFERENCE FREQUENCY

OPTIONAL VIDEO

OVERLAY PORT

PCB

5

4

3

2

1

0

ANALOG CRT

5

4

3

2

1

0

MONOCHROME OR COLOR

LCD (640 × 480 or 800 × 600)

February 1995

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