我的设计目标就是最后的芯片数一定要尽量少，更准确的说，是要让最后的电路板尽量小，因此，这些小不点的串行移位寄存器中标了。
My design goal was to have the fewest chips in the end. More correctly it was to have the smallest board space used.
这个寄存器定义了将用于数据通信的物理串行接口。
This register defines the physical serial interface which will be used for data communications.
移位寄存器是一种能以串行和并行方式输入信息的装置。
The shift register is a device in which information may enter sequentially or in parallel.
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