Each stage is set or reset corresponding to the input data at the time the shift pulse occurs. When the shift pulse occurs the data input is shifted in to that stage. The shift pulse is applied to each stage operating each simultaneously. Figure 1: Shift Registers (a) JK (b) D-type For the D-type stage the single data input line is connected as the D-input. Notice that the date input consists of opposite binary signals, the reference data signal going to the J input and the opposite data signal going to the K input. The shift register can be built using RS, JK or D flip-flops various types of shift registers are available some of them are given as under.Ī four stage shift-left register is shown in figure 1.
The data in a shift register is moved serially (one bit at a time). If in these registers the connection is done in such a way that the output of one of the flip flop forms in input to other, it is known as a shift register. A register will thus contain a series of bits which can be termed as a word or a byte. A single flip flop is supposed to stay in one of the two stable states 1 or 0 or in other words the flip flop contains a number 1 or 0 depending upon the state in which it is. When a number of flip flop are connected in series it is called a register. Shift RegisterĪ shift register is a storage device that used to store binary data.
#Basic data movement in shift registers serial
The input to a register or output from it may be either in serial or parallel form depending upon the requirement. Each flip flop can store 1-bit of information and therefore for storing a n-bit word n-flip-flops are required in the register for example a computer employing 16-bit word length requires 16 flip-flops to hold the number before it is manipulated. Flip flops are often used to make a register. A register is a device which is used to store information.
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