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TVP3010M Datasheet(PDF) 7 Page - Texas Instruments |
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TVP3010M Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 90 page  1–1 1 Introduction The TVP3010C and the TVP3010M palettes are commercial and military versions, respectively, of an advanced Video Interface Palette (VIP) from Texas Instruments implemented in the EPIC ™ 0.8-micron CMOS process. Differences between the two versions are outlined in separate tables. In both versions, 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-color 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. Both devices are software compatible with the INMOS ™ IMSG176/8 and Brooktree™ 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 five TTL inputs, CLK0 – CLK4, and is software selectable. Additionally, CLK1/CLK2 and CLK3/CLK4 can be selected as differential ECL clock sources. The video, shift-clock, and reference-clock outputs provide a software-selected divide ratio of the chosen clock input. The reference clock can optionally be provided as an output on CLK3, and a data-latch clock can optionally be input on CLK4. The TVP3010C and the TVP3010M have three 256 8 color look-up tables with triple 8-bit video digital-to-analog converters (DACs) capable of directly driving a doubly-terminated 75- Ω 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 provides 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. Each 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. Both the TVP3010 VIP and the TVP3010M VIP are highly system integrated. Either device can be connected to the serial port of a VRAM device without external buffer logic and each device can be connected to many graphics engines directly. The split shift register transfer function, which is supported by VRAM, is also supported by the TVP3010C and TVP3010M. The system-integration concept is carried to manufacturing testing and field diagnosis levels. To support these testing and diagnostic levels, several highly-integrated test functions have been designed to enable simplified testing of the palette, the graphics board, and the graphics system. EPIC is a trademark of Texas Instruments Incorporated. XGA is a registered trademark of International Business Machines Corporation. TARGA is a registered trademark of Truevision Incorporated. INMOS is a trademark of INMOS International Limited. Brooktree is a trademark of Brooktree Corporation. |
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