SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 316

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

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Video Processor Module
6.1
Figure 6-1 shows a top-level block diagram of the Video
Processor. For information about the relationship between
the Video Processor and the other modules of the SC2200,
see Section 1.2 on page 16. The Video Processor module
includes the following functions:
• Video Input Port
• Video Formatter
— CCIR-656 decoder
— Capture Video/VBI modes
— Direct Video mode
— Asynchronous video interface
— Horizontal/vertical scalers
— Filters
VIP Data
GX1 Graphics Data
Capture Video/VBI Data to
GX1 Video Frame Buffer
Video Data from GX1 Video Port
MODULE ARCHITECTURE
Capture Video/VBI
Direct Video/VBI
Controller and
Bus Master,
Controller
VIP
Figure 6-1. Video Processor Block Diagram
(Continued)
Video
Mux
Video
Data
316
• Mixer/Blender
• Outputs
• Dot Clock PLL
The following subsections describe each block in detail.
— Overlay with color/chroma key
— Gamma correction
— Color space converters
— Alpha blender
— CRT interface with DACs
— TFT interface
Horizontal Downscaler,
and Vertical Upscalers,
Line Buffer, Horizontal
Video Formatter
and Filters
Overlay with Gamma
RAM and Alpha
Mixer/Blender
Blending
DACs
CRT_IF
TFT_IF
Revision 3.0