We have given the following question:
Design a 4-bit, shift-right register with D flip flops, and use two of these registers to implement a circuit that detects the sequence (x1,x0)=3,0,2,1 (the rightmost digit, "1" in this case, is the first going in, see example). Information shifts one position right each time a positive edge of CK arrives.
I know how a shift register works, but this thing
Information shifts one position right each time a positive edge of CK arrives is confusing me a lot. I do not understand how can we implement a shift-register that shifts the information to right at positive edge of a clock.
I would be really thankful if someone would help me out and tell me if I a missing something or if I am wrong anywhere. Thanks in advanced.