高速数据采集系统中的DMA技术

DMA Technology in Fast Data Collect System

本文介绍了高速数据采集系统中的DMA控制器的功能；从A／D转换器的工作时序和RAM的写时序出发，叙述了采用DMA技术的高速数据采集系统的组成和工作原理，给出了相应的原理框图和时序图。这种系统特别适合于快速变化的动态信号的大量数据采集。

This paper introduces the functions of a DMA controller in fast data collect system. It's working principle and architecture which adopted the DMA technology is especially described started from the A/D transmission and RAM working time order. At last, the working principle diagram and time order diagram is given out. This system is very suited for the fast change dynamic signals batch data collect.