This paper makes a comparison among the following methods: DMA, Global Memory and Host Port Interface (HPI) and illustrates the hardware structure and software programming of HPI by an example of TMS320C54x, the typical chip of Texas Instrument.

• 下文比较了数据交换所采用的各种技术 ,包括 DMA、全局存储器和 HPI( Host portinterface) ,并通过 TI( Texas Instrument)的典型芯片TMS3 2 0 C5 4 x着重讨论了 HPI接口的硬件结构与软件编程。