一种基于DSP的通用存储器接口的设计

Design of a DSP-based Universal Memory Interface

DSP芯片的通用存储器接口可以满足DSP芯片访问片外存储器的需求,减少DSP芯片中嵌入式存储器的面积,提升DSP芯片整体性能。设计一款高性能的通用存储器接口是DSP芯片设计工作中的重要环节。设计并实现了一种基于DSP的通用存储器接口,支持多种同步或异步的ROM、SRAM和Flash存储器,支持存储器突发访问,支持外部总线共享。经过仿真验证,存储器接口可以正常工作。目前已成功应用于一款32位DSP芯片中。

Universal memory interface in DSP chip is able to meet the demands of accessing external memory and reduce the embedded memory in the DSP chip area, thereby enhancing the overall performance of the DSP chip. The design of a high-performance universal memory interface is of great importance in designing a DSP chip. The paper designs and develops a universal memory interface based on DSP, which is compatible with a variety of synchronous or asynchronous ROM, SRAM and Flash memory, supports memory burst access and enables external bus sharing. Simulation shows that the memory interface works well. The design has been successfully used in a 32-bit DSP chip.