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參數(shù)資料
| 型號(hào)： | TVP3020-175 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Video Interface PALETTE(視頻接口調(diào)色器) |
| 中文描述： | 視頻接口盒（視頻接口調(diào)色器） |
| 文件頁數(shù)： | 7/98頁 |
| 文件大?。?/td> | 582K |
| 代理商： | TVP3020-175 |
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1 Introduction
The TVP3020 Viewpoint Palette is an advanced Video Interface Palette (VIP) from Texas Instruments
implemented in EPIC
0.8-micron CMOS process. Maximum flexibility is provided by the pixel multiplexing
scheme. The scheme accommodates 64-, 32-, 16-, 8-, and 4-bit pixel buses without any circuit modification.
This enables the system to be easily reconfigured for varying amounts of available video RAM. The device
supports selection of little- or big-endian data format for the pixel-bus-frame buffer interface. Data can be
split into 1, 2, 4, or 8 bit planes for pseudo-color mode or split into 12-, 16- or 24-bit true-color and direct-color
modes. For the 24-bit direct color modes, an 8-bit overlay plane is available. The 16-bit direct- and true-color
modes can be configured to IBM XGA
(5, 6, 5), TARGA
(5, 5, 5, 1), or (6, 6, 4) as another existing format.
An additional 12-bit mode (4, 4, 4, 4) is supported with 4 bits for each color and overlay. An on-chip, IBM
XGA-compatible hardware cursor is incorporated so that further increases in graphics system performance
are possible. The device is also software compatible with the IMSG176/8 and Bt476/8 color palettes.
An internal frequency doubler is incorporated, allowing convenient and cost-effective clock source
alternatives to be utilized.
An auxiliary windowing function and a pixel-port-select function are provided so that overlay or VGA
graphics can be displayed on top of direct color inside or outside a specified auxiliary window. Color-keyed
switching of direct color and overlay is also supported.
Clocking is provided through one of three inputs (2 TTL- and 1 ECL/TTL-compatible) and is software
selectable. The video, shift clock, and reference clock outputs provide a software-selected divide ratio of
the chosen clock input.
The TVP3020 has three 256-by-8 color lookup tables with triple 8-bit video digital-to-analog converters
(DACs) capable of directly driving a doubly terminated 75-
line. The lookup tables are designed with a
dual-ported RAM architecture that enables ultra-high speed operation. Sync generation is incorporated on
the green output channel. Horizontal sync and vertical sync are fed through the device and optionally
inverted to indicate screen resolution to the monitor. A palette-page register is used to provide the additional
bits of palette address when 1, 2, or 4 bit planes are used. This allows the screen colors to be changed with
only one microprocessor interface unit (MPU) write cycle.
The device features a separate VGA bus that allows data from the feature connector of most VGA-supported
personal computers to be fed directly into the palette without the need for external data multiplexing. This
allows a replacement graphics board to remain downwards compatible by utilizing the existing graphics
circuitry often located on the motherboard.
The Viewpoint VIP is highly system integrated. It can be connected to the serial port of VRAM devices
without external buffer logic and connected to many graphics engines directly. The split shift-register transfer
function, which is supported by VRAM, is also supported by the TVP3020.
The system-integration concept is carried to manufacturing test and field diagnosis. To support these,
several highly integrated test functions have been designed to enable simplified testing of the palette, the
graphics board, and the graphics system.
NOTE:
The TVP3020 includes circuits that are patented and circuit designs that
have patents pending.
EPIC is a trademark of Texas Instruments Incorporated.
XGA is a registered trademark of IBM.
TARGA is a registered trademark of Truevision Incorporated.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TVP3020-135 | Video Interface PALETTE(視頻接口調(diào)色器) |
| TVP3025-135 | Video Interface PALETTE(三PLL，視頻接口調(diào)色器) |
| TVP3025-175 | Video Interface PALETTE(三PLL，視頻接口調(diào)色器) |
| TVP3030-175 | Video Interface PALETTE Exract(1600×1200，24位真彩色視頻接口調(diào)色器) |
| TVP3030-220 | Video Interface PALETTE Exract(1600×1200，24位真彩色視頻接口調(diào)色器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TVP3020-175MDN | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette |
| TVP3020-175PCE | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette |
| TVP3020-200MDN | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TVP3020-200PCE | 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) |
| TVP3020-220MDN | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette |
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