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YGV627 Datasheet

  • YGV627

  • AVDP3E - Advanced Video Display processor 3 Enhanced

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YGV627
AVDP3E
Advanced Video Display processor 3 Enhanced
s
OUTLINE
YGV627 is a VDP (Video Display Processor) that realizes higher resolution, multi-color and high speed drawing
by adopting a synchronous DRAM as the video memory, while maintaining the register compatibility with
YGV617B that is used for controlling the high minuteness On Screen Display (OSD).
Since the device is capable of displaying bitmap images with various resolutions ranging from NTSC to SVGA on
the monitors with any size of screen including wide screen, it can be used for controlling OSD for various display
units. Also, it is capable of representation of varied images in accordance with the application because numerous
number of colors can be selected such as the one in the range from 16 to 65536 RGB color display, or natural image
display using YCbCr.
In addition, the existing system can be up-graded easily thanks to the basic features from YGV617B such as a high
speed drawing function, character drawing function, synchronization with external video signal, digital video input /
output function, and hardware cursor display function.
s
FEATURES
YGV627 is capable of selecting two modes by using the setting of
ENH
pin.
For convenience, the case of using
ENH
pin with LOW level (enabled) is referred to as 鈥渆xpansion mode鈥?in this
document. In the expansion mode, all the functions can be used.
The case of using
ENH
pin with HIGH level (disabled) is referred to as 鈥渃ompatibility mode鈥? In the compatibility
mode, the software compatibility with YGV617B is maintained, but the functions enhanced for YGV617B cannot
be used. These modes should be used in accordance with the purpose of the application of this device.
[Display functions]
q
Three screen configuration including bitmap screen, sprite cursor screen and external input video screen
(or single color border screen)
q
Monitor synchronization frequency, dot clock frequency, and display screen resolution can be specified optionally.
q
Display dot clock up to 40 MHz (Example of resolution: NTSC, PAL, VGA, SVGA, NTSC wide, and VGA wide)
q
Support with progressive scanning and interlaced scanning
q
Resolution of sprite cursor screen is 32
X
32 dots. (The sprite cursor can also be used as cross-hair line cursor.)
q
Smooth hardware scroll function
q
Upper / lower two division display on the bitmap screen (The two sections can be scrolled independently).
q
256 word
X
16 bit CLUT is built-in (The number of display colors of 32768 colors or 65536 colors can be selected.)
q
Display colors: 16 palette color, 256 palette color, 32768 RGB color, 65536 RGB color, YCbCr422 (ITU601)
q
YCbCr (ITU601) -to-8 bit RGB decoder is built-in.
q
偽
blending function that mixes with external input screen or single color border screen. (64 intensity levels)
q
Dot clock generation with built-in PLL circuit
q
Generates dot clock that synchronizes with HSYNC of external video signal.
q
Generates dot clock that synchronizes with external input clock. (such as sub-carrier clock)
YGV627 CATALOG
CATALOG No.: LSI-4GV627A2
2001.01

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