【摘要】 :提出了一种实现双数据通道 DMA传输的新方法 ,并成功地应用于光子相关计中 ,得到了满意的实验结果 .并以 82 3 7DMA控制器为例 ,详细地分析了工作在命令传输方式的 82 3 7与外设、CPU之间的操作时序 ,提出了实现双数据传输方式的逻辑设计 ,拓宽了 DMA控制器的处理能力更多还原

【Abstract】 A method of implement dual transfer mode by using the 8237 DMAC is proposed in this paper,which is applied successfully in the photon correlator,the result of experiment we have obtained is satisfactory。 As an example, the operate timing among 8237 working in the demand transfer mode,peripheral and CPU is also analyzed in detail,the logic design of implementing dual transfer mode is presented,and the process ability of DMA controller is widened.更多还原