White Paper
Graphic Display Controller IC Technology
Memory Utilization and Data Traffic Pattern in
Fujitsu Graphics Display Controller ICs
Fujitsu Microelectronics America, Inc.
April 2007
| Contents | |
| Introduction | 2 |
| Prioritizing Graphics Memory Access | 2 |
| Data Traffic Pattern in a typical Fujitsu GDC | 3 |
| Dedicated Memory Architecture: Optimized for Performance | 3 |
| Unified Memory Architecture: Optimized for Economy | 5 |
| Conclusion | 5 |
Introduction
Fujitsu has a successful history of developing Graphic Display Controller (GDC) products for embedded applications such as automotive information and navigation display. Beginning with the introduction of the MB86290 in 1999, the GDC product family has evolved to include the low-end, feature-rich MB86276, designed for North American markets, all the way to the high-end and power-efficient MB86297.
One of the important design considerations for using these GDCs is graphics memory utilization. This paper will examine the traffic pattern across the different interfaces in a typical Fujitsu GDC, then identify potential bottlenecks in the system. Finally, it will compare the dedicated and shared architectures for graphics memory, proposing a balanced approach between the two that also optimizes system performance, cost, and board space utilization.
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