參數(shù)資料
型號(hào)： TVP3026-135
廠商： Texas Instruments, Inc.
英文描述： Video Interface PALETTE Exract(組合像素模式視頻接口調(diào)色器)
中文描述： 視頻接口調(diào)色板Exract（組合像素模式視頻接口調(diào)色器）
文件頁(yè)數(shù)： 34/107頁(yè)
文件大小： 707K
代理商： TVP3026-135
2–20
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 16:1.
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 8:1.
NOTE
The port select and color-key switching functions must be disabled and set for
palette graphics when in the pseudo-color mode. This is the default condition at
reset. See Section 2.8, Port Select and Color-Key Switching
2.6.4
Direct-Color Mode
In direct-color mode, 24, 16, 15, or 12 bits of data can be transferred directly to the RGB DACs but with the
same amount of pipeline delay as the overlay data and the 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 port select and color-key switching functions to provide overlay in
specific windows or on a pixel-by-pixel basis on the direct-color display as discussed in Section 2.8
,
Port
Select and Color-Key Switching See Table 2–17 for more details on selecting the direct-color modes. See
NOTES in the following section.
Submodes 1 and 2 are packed-24 modes. See subsection 2.6.6, Packed-24 Modes for a description of the
packed-24 modes.
Submodes 3 and 4 are the 32-bit direct-color modes that use eight bits to represent each color and eight
bits for overlay. The 64-bit-wide pixel bus of the TVP3026 allows multiplex ratios of 1:1 or 2:1. Submode 3
is organized as overlay, red, green, and blue, while submode 4 is organized as blue, green, red, and 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 TVP3026 supports multiplex ratios for this mode of 1:1, 2:1, and 4:1. 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 TVP3026 supports 1:1, 2:1,
and 4:1 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
TVP3026 supports 1:1, 2:1, and 4:1 multiplexing in this mode. Overlay is not available in this mode.
Submode 8 is the 4–4–4–4 configuration. It provides 12 bits of direct color and 4 bits of overlay. It allows
four bits for each of red, green, and blue data. The TVP3026 supports 1:1, 2:1, and 4:1 multiplexing ratios
in this mode.
2.6.5
True-Color Mode
In true-color mode, the palette RAM is partitioned into three independent 256-word x 8-bit memory blocks
that can be individually addressed by each color field of the true-color data. The independent memory blocks
provide data for a single DAC output. With this architecture, gamma correction for each color is possible.
Since the palette is used in true-color mode, there is no memory space to be used for the overlay function.
All of the true-color submodes are the same as direct color except that overlay is not available. See
Table 2–17 for more details on mode selection, and see NOTES below.
相關(guān)PDF資料
PDF描述
TVP3026-175 Video Interface PALETTE Exract(組合像素模式視頻接口調(diào)色器)
TVP3026-175M Video Interface PALETTE Exract(組合像素模式視頻接口調(diào)色器)
TVP3026-220 Video Interface PALETTE Exract(組合像素模式視頻接口調(diào)色器)
TVP3026-250 Video Interface PALETTE Exract(組合像素模式視頻接口調(diào)色器)
TX24 60.8 MM 5 X 8 DOT MATRIX DISPLAYS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TVP3026-135AMDN 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette
TVP3026-135APCE 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette
TVP3026-135BMDN 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette
TVP3026-135BPCE 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette
TVP3026-135MDN 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)
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