Fujitsu car navigation image display controller

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Fujitsu's MB86276 is based on Fujitsu's innovative three-dimensional (3D) image display controller MB86296, which is designed for high-end cars. The new two-dimensional (2D) image display controller (GDC) MB86276 is ideal for the mid-range car navigation and entertainment market, which is emerging in North America and is likely to become the future of the Asian market. The MB86276 2D Image Display Controller (GDC) also features many features of high-end 3D devices, including dual display support, image capture, alpha blending, and 16-bit Z-buffer for low-end 3D operation.

The MB86276 2D image display controller has an engine and video input unit originally designed for the Fujitsu MB96296 3D GDC. It also has built-in alpha blending, anti-aliasing and chroma key functions as well as upper and lower image counters. The new device's optimized central processor ensures a more direct CPU connection, so the device can be connected to a wide range of processors and controllers from different manufacturers. All operating system drivers developed for Fujitsu's original 3D image display controller family can be applied to the 2D image display controller with a little modification.

The internal frequency of the MB86276 is 133MHz and the displayed reference operating frequency is 400.9MHz. The display resolution is between 320 x 240 and 1280 x 768. Six-layer stacked windows (each with a Color depth of 8, 16 or 24 bits/pixel) can be used simultaneously, as well as size, position and priority. The maximum value of the logic layer is 4096 x 4096 pixels. By using alpha mapping, the private layers can be easily mixed and randomly assigned to any of the six layers to 8 bits per pixel. In addition, each pixel can be mixed to ensure clarity.

The device also supports internal and external direct memory access (DMA), and the 32-bit external SDRAM interface can support 64MB of image memory. The device also has an I2C interface and GPIO inputs and outputs.

Dual display output ensures multiple applications

The MB86276 features all the 2D features of the MB96296 3D Image Display Controller, including texture mapping, alpha blending, Gouraud shading, flat shading and innovative dual display output. With the dual display mode, the image display controller can simultaneously drive two interconnected display devices having the same resolution.

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