Question

Question #5 (3 marks): The content of a 4-bit register is initially 1001. The register is shifted six times to the right, with the serial input (SI) being 010010. What is the content of the register after each shift? --------- --------- Serial in (SI) Serial in (SI) NO D1Q1 - D 2 Q2 Io D3 03 _ Dr D3 Q3 DO QO Serial out (SO) CE CE HCE LACE 1 Shift Clock - Q3 Q2 Q1 QO 1 0 0 1 Initial content of register Content after first shift Content after second shift Content after third shift Content after fourth shift Content after fifth shift Content after sixth shift

Answer 1

	Q3	Q2	Q1	Q0
Initial content of register	1	0	0	1
Content after first shift	0	1	0	0
Content after second shift	1	0	1	0
Content after third shift	0	1	0	1
Content after fourth shift	0	0	1	0
Content after fifth shift	1	0	0	1
Content after sixth shift	0	1	0	0

in each shift Q3 accepts 1 bit from input and Q3 bit transfers to Q2 , Q2 transfers to Q1 and so on .

In below fig I tried to demonstrate how a serial in serial out shift register takes input and gives output .

Serial data input Serial data output On On O o