參數(shù)資料
型號: SSD1905QT2
廠商: Electronic Theatre Controls, Inc.
英文描述: LCD Graphics Controller CMOS
中文描述: LCD圖形控制器的CMOS
文件頁數(shù): 129/153頁
文件大?。?/td> 863K
代理商: SSD1905QT2
SOLOMON
Rev 1.3
10/2002
SSD1905
120
17 Virtual Display Mode
Virtual display refers to the situation where the image to be viewed is larger than the physical display. The
difference can be in the horizontal, vertical or both dimensions. To view the image, the display is used as a
window into the display buffer. At any given time only a portion of the image is visible. Panning and scrolling
are used to view the full image. Panning describes the horizontal (side to side) motion of the display area.
Scrolling describes the vertical (up and down) motion of the display area.
The Main Window Display Start Address register specifies the starting address of main window image in the
display buffer. The Main Window Line Address Offset register determines the number of horizontal pixels in
the virtual image. Figure 17-1 : Main Window inside Virtual Image Area illustrates the situation.
320 x 240
Virtual Image Area
240 x 160
Main Window
Panning
Scrolling
Figure 17-1 : Main Window inside Virtual Image Area
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