第七讲 移位寄存器 移位寄存器是暂时存放数据的部件,同时它还具有移位功能。 一、特点和分类 从逻辑结构上看,移位寄存器有以下两个显著特征:(1)移位寄存器是由相同的寄存单元所组成。一般说来,寄存单元的个数就是移位寄存器的位数。为了完成不同的移位功能,每个寄存单元的输出与其相邻的下一个寄存单元的输入之间的连接方式也不同。(2)所有寄存单元共用一个时钟。在公共时钟的作用下,各个寄存单元的工作是同步的。每输入一个时钟脉冲,寄存器的数据就顺序向左或向右移动一位。通常可按数据传输方式的不同对CMOS移位寄存器进行分类。移位寄存器的数据输入方式有串行输入和并行输入之分。串行输入就 The seventh shift register Shift register is the temporary storage of data components, it also has a shift function. First, the characteristics and classification From the logical structure, the shift register has the following two salient features: (1) The shift register is composed of the same register unit. In general, the number of register locations is the number of bits in the shift register. In order to accomplish different shift functions, the connection between the output of each register cell and the input of the next register cell next to it is also different. (2) All registers share one clock. Under the function of the public clock, the work of each register unit is synchronized. Each time a clock is input, the register data is sequentially shifted to the left or right by one bit. The CMOS shift registers are usually classified according to the type of data transfer. Shift register data input has a serial input and parallel input points. Serial input on it