51系列单片机中实现DMA数据传送

Realize data transfer of DMA in 51 serial single-chip microcomputer

51单片机在数据传送中容量明显不足,应用接口扩展电路和DMA控制器,通过存储器扩展,在几乎不占用单片机资源的情况下,实现了单片机控制系统的DMA数据传送。该方法可用于软盘驱动器或高速采样的接口设计中。

The 51 serial single-chip microcomputer is obviously inadequate capacity in data transfer.By extending the memory,the data can be transferred by using the interface to expand the circuit and the DMA controller with little share in the single-chip mircrocmputer's resources.This method can be used to design the interface of the floppy disk driver or the high-speed sampling circuit.