Single DRAM LCD/VGA Controllers
Description
CL-GD62XX
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®
Preliminary Data Book
FEATURES
s IBM®_VGA hardware-compatible s Integrated RAMDAC™ s Integrated programmable frequency synthesizer
— 65 MHz at 5.
0V; 40 MHz at 3.
3V
Single DRAM LCD/VGA Controllers for Monochrome/ Color Notebook Computers
OVERVIEW
The CL-GD62XX (CL-GD6205/’6215/’6225/’6235) family of advanced single-chip flat panel VGA controllers are designed for use in portable systems with stringent power consumption and form-factor requirements.
Product family pin compatibility provides easy upgrade capability to color or higher-performance systems.
Integration of the frequency synthesizer, RAMDAC, monochrome and color STN/TFT panel interfaces minimizes the form-factor requirement for color and monochrome graphics subsystems.
All necessary panelpower sequencing logic has been integrated into the CL-GD62XX family, and a complete graphics subsystem can be built using only two active components (in less than three square inches).
The CL-GD62XX family uses a single 256K x 16 DRAM (or four 256K x 4 DRAMs) for video memory.
For added flexibility, dual-CAS*-DRAM and dual-WE*-DRAM configurations are supported.
With integrated Frame-Accelerator technology, the CL-GD62XX controllers feature low-power LCD operation, yet support high LCD panel vertical-refresh rates.
No additional DRAMs are required for frame (cont.
)
s Supports single 256K x 16 DRAM configuration
— Symmetric or asymmetric RAS/CAS-address DRAM
s Color STN panel support (CL-GD6225/’6235 only)
— Dual-scan color STN panel support (CL-GD6235 only) — 8- and 16-bit interfaces (no extra components required) — Up to 256 simultaneous colors from a palette of 256K
s Integrates color TFT panel support
— Supports 9-, 12-, 15-, and 18-bit TFT panels — Up to 256 simultaneous colors from a palette of 256K
s Connects directly to local bus, ISA bus (PC AT) or PI bus (CL-GD6205 connects to ISA bus only) s Windows performance-improvement features
— — — — True packed-pixel addressing Improved d...
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