Universal Shift Register Diagram. The input is given to the and gate 1 of the flip flop 1 as shown in the figure via serial input pin. A unidirectional shift register is capable of shifting in only one direction.
The block diagram of 3 bit siso shift register is shown in the following figure. Ic 74395 4 bit universal shift register with three state outputs. A bidirectional shift register is capable of shifting in both the directions.
The functional diagram of the shift register is shown below.
These universal shift registers can perform any combination of parallel and serial input to output operations but require additional inputs to specify desired function and to pre load and reset the device. Universal shift register is a register which can be configured to load and or retrieve the data in any mode either serial or parallel by shifting it either towards right or towards left. Now let we have a register which can capable to transfer data in both the shift right and shift left along with the necessary input and output terminals for parallel transfer then it is called a shift register with parallel load or universal shift register now what are the parameters should have in a universal shift register. The input is given to the and gate 1 of the flip flop 1 as shown in the figure via serial input pin.
