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參數(shù)資料
| 型號： | TVP3030-250 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Video Interface PALETTE Exract(1600×1200，24位真彩色視頻接口調(diào)色器) |
| 中文描述： | 視頻接口調(diào)色板Exract（1600 × 1200,24位真彩色視頻接口調(diào)色器） |
| 文件頁數(shù)： | 36/107頁 |
| 文件大小： | 689K |
| 代理商： | TVP3030-250 |
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2–20
To program for VGA mode 2, bit MCR7 in the multiplex control register must be logic 1 to select VGA mode,
and bit MCR6 must be logic 0 to latch VGA7–VGA0 and the VGA video controls with CLK0. The clock
selection register bits CSR3–CSR0 must be 0111 for CLK0 data latching.
2.8.3
Pseudo-Color Mode
In pseudo-color mode (sometimes called color indexing), the pixel-bus inputs are used to address the
palette-RAM. The pallete RAM functions as a color look-up table. The data in each RAM location is
comprised of 24 bits, 8 bits for each of the red, green, and blue color DACs. The pseudo-color mode is further
grouped into 3 submodes. In each submode, a pixel bus width of 8, 16, 32, 64, or 128 bits may be used.
Data should always be presented on the least significant bits of the pixel bus. For example, when a 64-bit
pixel bus width is used, the pixel data must be presented on P63–P0. See Tables 2–16 and 2–17 for more
details.
Submode 1 uses four bit planes to address the color palette. The four bits are fed into the low-order address
bits of the palette with the four high-order address bits being defined by the palette-page register. This mode
provides 16 pages of 16 colors and can be used at multiplex ratios of 2:1 to 32:1.
Submode 2 uses four bit planes to address the color palette. Each byte of the pixel bus contains two pixels
which are in reverse order (nibble swapped). The first pixel is latched in on the upper four bits and the second
pixel is latched in on the lower four bits of each byte. The 4-bit pixels are fed into the low order address bits
of the palette with the four high order address bits being defined by the palette page register. This mode
provides 16 pages of 16 colors and can be used at multiplex ratios from 2:1 to 32:1.
Submode 3 uses eight bit planes to address the color palette. Since all eight bits of palette address are
specified from the pixel port, the palette-page register is not used. This mode provides 256 colors and can
be used at mulitplex ratios from 1:1 to 16:1.
NOTE:
The color-key switching function must be disabled (index: 0x38 = 0x00) and the
palette RAM must be selected for display (MSC5=0) when in the pseudo-color
mode. This is the default condition at reset. See Section 2.10.
2.8.4
Direct-Color Mode
In direct-color mode, 24, 16, 15, or 12 bits of data can be transferred directly to the RGB DACs with the same
amount of pipeline delay as the overlay data and the video control signals. Depending on which direct-color
mode is selected, overlay is provided by utilizing the remaining bits of the pixel bus to address the palette
RAM. This results in a 24-bit RAM output that is then used as overlay information to the DACs. The overlay
capability is designed to work with the color-key switching function to provide overlay in specific windows
or on a pixel-by-pixel basis on the direct-color display as discussed in Section 2.1. See Tables 2–16 for more
details on selecting the direct-color modes. See NOTES in the following section.
Submodes 1 and 2 are packed-24 modes. See section 2.8.6 for a description of the packed-24 modes.
Submodes 3 and 4 are the 24-bit direct-color modes that use eight bits to represent each color and eight
bits for overlay. The 128-bit-wide pixel bus of the TVP3030 allows multiplex ratios of 1:1, 2:1, or 4:1.
Submode 3 is organized as overlay, red, green, blue, while submode 4 is organized as blue, green, red,
overlay.
Submode 5 is the XGA-compatible (5–6–5) 16-bit-color mode supporting five bits of red, six bits of green,
and five bits of blue data. The TVP3030 supports multiplex ratios for this mode of 1:1, 2:1, 4:1, and 8:1.
Overlay is not available in this mode.
Submode 6 is the TARGA-compatible (1–5–5–5) mode that uses 15 bits for color and 1 bit for overlay. It
allows 5 bits for each of red, green, and blue data and one bit for overlay. The TVP3030 supports 1:1, 2:1,
4:1, and 8:1 multiplex ratios in this mode.
Submode 7 is the (6–6–4) configuration. It provides six bits of red, six bits of green, and four bits of blue.
The TVP3030 supports 1:1, 2:1, 4:1, and 8:1 multiplexing in this mode. Overlay is not available in this mode.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TVP3030-250MEP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TVP3033 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette |
| TVP3033-175 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette |
| TVP3033-175PPA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Video DAC with Color Palette (RAMDAC) |
| TVP3033-220 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette |
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