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Service Guide 4-13
4.3.6 C&T 65550 High Performance Flat Panel / CRT VGA Controller
The C&T 65550 of high performance multimedia flat panel / CRT GUI accelerators extend CHIPS’
offering of high-performance flat panel controllers for full-featured notebooks and sub-notebooks.
The C&T 65550 offers 64-bit high performance and new hardware multimedia support features.
High Performance
Based on a totally new internal architecture, the C&T65550 integrates a powerful 64-bit graphics
accelerator engine for Bit Block Transfer (BitBLT), hardware cursor, and other functions intensively
used in graphical user interfaces (GUIs) such as Microsoft Windows™. Superior performance is
also achieved through a direct 32-bit interface to the PCI local bus. The C&T65550 offers
exceptional performance when combined with CHIPS advanced linear acceleration driver
technology.
Hardware Multimedia Support
The C&T65550 implements independent multimedia capture and display systems on-chip. The
capture system places data in display memory (usually off screen) and the displya system places it
in a window on the screen.
The capture system can receive data from either the system bus or from the ZV enabled video port
in either RGB or YUV format. The input data can also be scaled down before storage in display
memory (e.g., from any size larger than 320x240 down to 352x248). Capture of input data may also
be double buffered fro smoothing and to prevent image tearing.
The display system can independently place either RGB or YUV data from anywhere in display
memory into an onscreen window which can be any size and located at any pixel boundary (YUV
data is converted to RGB “on-the-fly” on output). Non-rectangular windows are supported via color
keying. The data can be functionally zoomed on output up to 8x to fit the onscreen window and can
be horizontally and vertically interpolated to scale or zoom artifacts. Interlaced and non-interlaced
data are supported in both capture and display systems.
Versatile Panel Support
The C&T65550 supports a wide variety of monchrome and color Single-Panel, Single-Drive (SS)
and Dual-Panel, Dual-Drive (DD) standard and high-resolution passive STN and active matrix
TFT/MIM LCD and EL panels. For monchrome panels, up to 64 gray scales are supported. Up to
4096 different colors can be displayed on passive STN LCDs and up to 16M colors on 24-bit active
matrix LCDs.
Low Power Consumption
The C&T65550 employs a variety of advanced power management features to reduce power
consumption of the display sub-system and extend battery life. Although optimized for 3.3V
operation. The C&T65550 controller’s internal logic, memory interface, and panel interfaces can be
independently configured to operate at either 3.3V or 5V.
Software Compatibility / Flexibility
The C&T65550 are fully compatible with VGA at the register, and BIOS levels. CHIPS and third-
party vendors supply fully VGA-compatible BIOS, end-user utilites and drivers for common
application programs.