DMA
DMA-------(Direct Memory Access)直接存储器访问
外部设备不通过CPU直接与系统内存交换数据的接口技术。即是一种无需CPU的参与就可以让外设和系统内存之间进行双向数据传输的硬件机制。
Non-CPU-intervened data transfers
between a peripheral and CPU (system memory) or between two different peripherals or
between two different gateways of the same peripheral
are collectively referred to as DMA in FX3
. All the data in the DMA
subsystem flows through the system memory.
AHB(Advanced High Performance Bus)高性能总线