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312 AMD Geode™ SC1200/SC1201 Processor Data Book
Video Processor Module
32579B
Display Modes
• CRT modes:
— 640x480x16 bpp at 60-85 Hz vertical refresh rates
— 800x600x16 bpp at 60-85 Hz vertical refresh rates
— 1024x768x16 bpp at 60-85 Hz vertical refresh rates
— 1280x1024x8 bpp at 60-75 Hz vertical refresh rates
• TFT modes:
— TFT on IDE: FPCLK max is 40 MHz
— TFT on Parallel Port: FPCLK max is 80 MHz
— 640x480x16 bpp at 60-85 Hz vertical refresh rates
— 800x600x16 bpp at 60-85 Hz vertical refresh rates
— 1024x768x16 bpp at 60-75 Hz vertical refresh rates
— 1280x1024x8 bpp at 60 Hz vertical refresh rate
• TV modes:
— NTSC: 720x480 and 640x480
— PAL: 720x576 and 768x576
— BGU481 package does not support simultaneous
TV/CRT or TV/TFT operation
7.1 Module Architecture
Figure 7-1 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 SC1200/
SC1201 processor, see Section 2.2 on page 22. The Video
Processor module includes the following functions:
• Video Input Port
— CCIR-656 decoder
— Capture Video/VBI modes
— Direct Video/VBI modes
• Video Formatter
— Asynchronous video interface
— Horizontal/Vertical scalers
— Filters
• Mixer/Blender
— Overlay with color/chroma key
— Gamma correction
— Color space converters
— Alpha blender
• TV Encoder
— Horizontal scalers
— Scan rate converter
— Flicker filter
— VESA Video Interface Port Rev. 1.1 Task B encoder
— TV Timing Generator
— TV encoder
• Outputs
— TV interface with DACs
— CRT interface with DACs
— TFT interface
— Video Output Port (VOP)
• Dot Clock PLL
The following subsections describe each block in detail.
Figure 7-1. Video Processor Block Diagram
VIP
Capture Video/VBI
Bus Master,
Video Formatter
Horizontal Downscaler,
Line Buffer, Horizontal
and Vertical Upscalers,
and Filters
Mixer/Blender
Overlay with Gamma
RAM and Alpha
Blending
TVOUT
Flicker Filter,
Horizontal Scaling,
Capture Video/VBI Data to
GX1 Video Frame Buffer
VIP Data
Video or VBI Data from GX1 Video Port
Video
Mux
VBI
Mux
Video
Data
TFT_IF
CRT_IF
VOP
TV_IF
DACs
DACs
VESA Encoder,
Timing Generator,
and TV Encoder
Controller and
Direct Video/VBI
Controller
VBI
Data
GX1 Graphics Data