Computer Science · Digital Logic
Consider a digital display system (DDS) that displays the contents of a register X. A 16-bit code word is used to load a word into 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 a mode bit M, a component T selects an input word to load into X. Components P and Q interface with the corresponding bits in the code word to choose the addressed word from S and R, respectively. Which one of the following represents the functionality of P, Q, and T?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1P is a 1 : 10 de-multiplexer; Q is a 1 : 5 de-multiplexer; T is a 2 : 1 multiplexer
- 2P is a 10 : 210 decoder; Q is a 5 : 25 decoder; T is a 2 : 1 multiplexer✓
- 3P is a 10 : 210 decoder; Q is a 5 : 25 decoder; T is a 2 : 1 encoder
- 4P is a 10 : 1 multiplexer; Q is a 5 : 1 multiplexer; T is a 2 : 1 multiplexer
Correct answer
P is a 10 : 210 decoder; Q is a 5 : 25 decoder; T is a 2 : 1 multiplexer
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