We know that one flip-flop can store one-bit of information. In order to store multiple bits of information, we require multiple flip-flops. The group of flip-flops, which are used to hold (store) the binary data is known as register . If the register is capable of shifting bits either towards right hand side or towards left hand side is known as shift register . An ‘N’ bit shift register contains ‘N’ flip-flops. Following are the four types of shift registers based on applying inputs and accessing of outputs. Serial In − Serial Out shift register Serial In − Parallel Out shift register Parallel In − Serial Out shift register Parallel In − Parallel Out shift register Serial In − Serial Out (SISO) Shift Register The shift register, which allows serial input and produces serial output is known as Serial In – Serial Out (SISO) shift register. The block diagram of 3-bit SISO shift register is shown in the following figure. This block d...
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