On the first falling edge of clock, the FF-3 is set, and stored word in the register is Q 3 Q 2 Q 1 Q 0 = 1000.Īpply the next bit to D in. Block Diagram Operationīefore application of clock signal, let Q 3 Q 2 Q 1 Q 0 = 0000 and apply LSB bit of the number to be entered to D in. Q 3 is connected to the input of the next flip-flop i.e. D 3 is connected to serial data input D in. If an entry of a four bit binary number 1 1 1 1 is made into the register, this number should be applied to D in bit with the LSB bit applied first. Let all the flip-flop be initially in the reset condition i.e. There are four mode of operations of a shift register. The registers that allow such data transfers are called as shift registers. The binary data in a register can be moved within the register from one flip-flop to another. The n-bit register will consist of n number of flip-flop and it is capable of storing an n-bit word. Such a group of flip-flop is known as a Register. To increase the storage capacity in terms of number of bits, we have to use a group of flip-flop. Flip-flop is a 1 bit memory cell which can be used for storing the digital data.
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