CS9211-VNG National Semiconductor, CS9211-VNG Datasheet - Page 16

• Manufacturer Part Number: CS9211-VNG
• Manufacturer: National Semiconductor

Specifications of CS9211-VNG

• Operating Temperature (max): 85C
• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Not Compliant

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Functional Description
3.2
The block diagram of the CS9211, along with the basic sys-
tem interconnections are shown in Figure 3-4. Details of
each block will be discussed in this section.
The CS9211 interfaces directly to industry standard 8-, 16-
and 24-bit color or monochrome single or dual-scan STN
flat panels (not all combinations are supported). It can also
support 18-bit active matrix thin-film-transistor (TFT) with
one or two pixels per clock.
The digital RGB or video data that is supplied by the
CS5530A is converted into a suitable format to drive the
supported panels. The heart of the device is the Frame
Rate Modulator (FRM), which provides the ability to display
various intensities of each primary color. Dithering logic is
included to further increase the apparent number of colors
that can be displayed. To support the DSTN panels, a
memory controller that interfaces to external EDO DRAM
or SDRAM (used as a frame buffer) is built into the
Companion
CS5530A
Geode™
FUNCTIONAL BLOCKS
I/O
18
4
4
Dither
Generator
Timing
DSTN
(Continued)
Serial-IF/Register Block
18
Figure 3-4. CS9211 Block Diagram
DSTN/
XGA
FRM
16
CS9211. A configurable timing generator provides timing
pulses tailored to the panel being driven. The CS9211 sup-
ports automatic power sequence of panel power supplies.
The device contains a CRC generator which may be used
for self-validation during silicon validation.
Each pixel on an SSTN or DSTN LCD panel consists of
three primary color components: red, green, and blue.
Each primary color component, for a given pixel, can be
turned on or off; there are no intermediate intensities. A
total of eight colors can be generated for a given pixel
through various combinations of turning each color compo-
nent on or off. In order to generate more colors, frame rate
modulation and dithering are used. The CS9211 is capable
of generating 256K different colors, based on the 18-bit
RGB pixel inputs.
3
TFT
DRAM/SDRAM
24
Controller
Memory
3
37
Engine
CRC
3
24
Interface
Panel
SSTN,
DSTN
Panel
TFT,
Revision 2.1
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