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Fujitsu display controller operates at 200MHz

Posted: 21 Feb 2002 ?? ?Print Version ?Bookmark and Share

Keywords:fujitsu microelectronics europe? fujitsu? controller ic? graphics ic? graphics display controller?

The MB86293 "Coral" graphics display controller operates at an internal frequency of 200MHz (400MHz for display dot clocks)twice that of previous devicesenabling its rendering engine to achieve what is claimed to be a 10-fold improvement in texture-mapping and drawing-image quality.

Manufactured using 0.18?m technology, the Coral also offers a 64-bit memory bus, a multiple geometry engine, and supports six display layerscompared with four for earlier controllers. It also provides enhanced display layer management functions and is suited for use in multimedia automotive in-vehicle navigation and infotainment, and mobile appliance applications.

This bandwidth allows a greater rate of access for graphics elements such as polygons, provides for the display of larger images, and delivers improved scanning functions within the display controller. The bandwidth also provides for Alpha mapping, which enables alpha-blendingthe process which allows each screen element to be viewed at different levels of transparency.

Coral allows the assignment of 8 bits per pixel, enabling each pixel to be priority-selected and mixed to control transparency to a more defined degree. This feature also enhances bit block transfer, which can now be combined with alpha-mapping.

The display controller is capable of accepting computer graphics signals with resolution from 320x200 pixels to 1,024x746 pixels. With six display layers, higher resolutions can also be achieved. The six-layer display supports four different 256-color palettes, and offers 24-bit and 16-bit resolution, direct color or 8-bit resolution, and indirect color.

The MB86293 also integrates a dedicated unit for texture-mapping, allowing complex scenes with many map images to be displayed with great clarity. A line depth facility that defines correct respective level of intersecting map lines is also included.

Coral integrates a new video input upscaling facility that allows the display of high-resolution, full-screen mode multimedia pictures. Both upscaling and downscaling can be set independently in horizontal and vertical directions in pixel or line resolutions. The external video input of device conforms to the RBT-ITU656 standard and permits video signals to be displayed together with generated graphics.

The video input is capable of accepting, TV tuner, DVD player or camera signals in PAL or NTSC video formats. The video stream is read, modified, and written to a video buffer memory independent from the display scanning process. The progressive or interlaced video can then be grabbed, scaled, and displayed through PIP.

Coral addresses up to 64MB of external SDRAM or FCRAM, and is capable of adjusting picture sizes to optimize the available memory space. It consumes a maximum 1.5W (200MHz) and operates at a temperature range of -40C to 85C.

Housed in either QFP or BGA packages, the MB86293 is compatible with host CPU buses including Fujitsu FR, Hitachi SH3 and SH4, and NEC V83, without external glue logic. It is also binary-compatible with previous-generation graphic display controllers, including the Cremson, Orchid, and Scarlet devices.

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