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參數(shù)資料
| 型號(hào)： | GM2115 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | ANALOG INTER FACE XGA/SXGA ONPANEL LCD PANEL CONTROLLER |
| 中文描述： | 模擬國際米蘭的XGA / SXGA ONPANEL液晶顯示器控制器 |
| 文件頁數(shù)： | 41/54頁 |
| 文件大?。?/td> | 1339K |
| 代理商： | GM2115 |
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***
Genesis Microchip Confidential ***
gm2115/25 Preliminary Data Sheet
June 2002
39
C2115-DAT-01B
(CELLMAP_XSZ+1) * CELLMAP_YSZ +
18 * ROUND(Number of 1-bit per pixel fonts / 2) +
18 * (Number of 2-bit per pixel fonts) +
36 * (Number of 4-bit per pixel fonts) <= 4096
For example, an OSD menu 360 pixels wide by 360 pixels high is 30 cells in width and 20
cells in height. Many of these cells would be the same (e.g. empty). In this case, the menu
could contain more than 32 1-bit per pixel cells, 100 2-bit per pixel cells, and 16 4-bit per
pixel cells. Of course, different numbers of each type can also be used.
4.12.2 Color Look-up Table (LUT)
Each pixel of a displayed cell is resolved to an 8-bit color code. This selected color code is
then transformed to a 24-bit value using a 256 x 24-bit look up table. This LUT is stored in
an on-chip RAM that is separate from the OSD RAM. Color index value 0x00 is reserved for
transparent OSD pixels.
4.12.3 OSD Position
The OSD menu can be positioned anywhere on the display region. The reference point is
Horizontal and Vertical Display Background Start (DH_BKGND_START and
DV_BKGND_START in Figure 18).
4.12.4 OSD Stretch
The OSD image can be stretched horizontally and/or vertically by a factor of two, three, or
four. Pixel and line replication is used to stretch the image.
4.12.5 Blending
Sixteeen levels of blending are supported for the character-mapped and bitmapped images.
One host register controls the blend levels for pixels with LUT values of 128 and greater,
while another host register controls the blend levels for pixels with LUT values of 127 and
lower. OSD color LUT value 0 is reserved for transparency and is unaffected by the blend
attribute.
Blend levels for binary codes “1111” through “0000” are 6.25%, 12.5%, 18.75%, 25%,
31.25%, 37.5%, 43.75%, 50%, 56.25%, 62.5%, 68.75%, 75%, 81.25%, 87.5%, 93.75%,
100%. Blend percentage level refers the percentage of the output data that is OSD.
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