This interface can be used to data exchange with peripheral apparatus for processor and controller which have not SPI interface function.

通过该方法的介绍，使得那些没有SPI接口功能的处理器和控制器能够扩展SPI接口，以便同外部设备进行数据交换。

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Difficulty of system Extending and transplant are found by means of PCI (Peripheral Component Interface) bus motion controller or PC (Programmable controller).

系统的扩展和移植难度发现的PCI(外设组件接口)总线运动控制器或PC(可编程控制器)的手段。

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