Answer to Question #242390 in Electrical Engineering for hhhhhh

Question #242390

design a circuit that would be able to shift bits but also store them for a duration of time. explain what are the technicalities of such a circuit


1
Expert's answer
2021-09-26T11:55:43-0400

The two selection lines S1 and S2 are connected to the selection inputs of all four multiplexers.

The selection lines choose the four bits of one register and transfer them into the four-line

common bus.

When both of the select lines are at low logic, i.e. S1S0 = 00, the 0 data inputs of all four

multiplexers are selected and applied to the outputs that forms the bus. This, in turn, causes the

bus lines to receive the content of register A since the outputs of this register are connected to the

0 data inputs of the multiplexers.

Similarly, when S1S0 = 01, register B is selected, and the bus lines will receive the content

provided by register B.

The following function table shows the register that is selected by the bus for each of the four

possible binary values of the Selection line

 A common busy sstem is shown below with the corresponding truth table:






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