Design a 4-bit shift register

Objectives

Review Logisim in the CS201 lab material and particularly Introduction to Logisim
Review D-flip-flop and Multiplexers (MUX-4)
Build a 4-bit shift register circuit 

Preparation

• Read the lab notes

Lab Assignments

1. Create a circuit project Lab1.circ in the Logisim.
2. Add a circuit testing D-Flip-Flop
3. Add a circuit testing a 4-1 Multiplexer
4. Build a 4-bit shift register using four D-flip-flops and four multiplexers (MUX-4).
   Make sure that you have selection inputs control over it.

   	Select Inputs	Function
   	S1	S0			 
   	------------------------
   	0	0	Store
   	0	1	Shift left
   	1	0	shift right
   	1	1	Load
   
   

   
   Here is the design diagram for you to design the circuit:

   

   Hand-In

   1. Submit the file Lab1.circ which includes all the circuits needed.
   2. Submit the file Lab1.pdf which contains the following:
      • Screenshot of the testing circuit of the one bit D-flip-flop
      • Screenshot of the testing circuit of the one bit 4-1 Multiplexer
      • Screenshot of the circuit implementing the above 4-bit shift register design, with proper labels for the inputs/outputs.
      • Test your circuit with different input values.
        Screenshots of the four different scenarios.