描述
移位寄存器有数据输入端(IN)、移位时钟端(CP)及复位端(R),必须按照输入(IN)、时钟(CP)、复位(R)和SFT指令的顺序进行编程。当移位时钟由OFF→ON时,将(D1~D2)通道的内容,按照从低位到高位的顺序移动一位,最高位溢出丢失,最低位由输入数据填充。当复位端输入ON时,参与移位的所有通道数据均复位,即都为OFF。
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