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GATE | CS 2022 | Question 40
Consider a digital display system (DDS) shown in the figure that displays the contents of register X. A 16-bit code word is used to load a word in X, either from S or from R. S is a 1024-word memory segment and R is a 32-word register file. Based on the value of mode bit M, T selects an input word to load in X. P and Q interface with the corresponding bits in the code word to choose the addressed word. Which one of the following represents the functionality of P, Q, and T?
(A)
P is 10:1 multiplexer; Q is 5:1 multiplexer; T is 2:1 multiplexer
(B)
P is 10:210 decoder; Q is 5:25 decoder; T is 2:1 encoder
(C)
P is 10:210 decoder; Q is 5:25 decoder; T is 2:1 multiplexer
(D)
P is 1:10 de-multiplexer; Q is 1:5 de-multiplexer; T is 2:1 multiplexer
Answer
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