Arithmetic Circuits & Full Adders

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  • Thread starter KongMD
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  • #1
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Homework Statement


An arithmetic circuit has two select lines S1 and S2 and does the following arithmetic operations using a full adder:

[function table]

Determine the simplified Boolean functions for Xi and Yi for a single stage of the circuit given inputs A & B are n-bit registers.


Homework Equations




The Attempt at a Solution


All I want to know is how to turn the given function table into a truth table so I can construct the logic diagram. Is the Carry-in part of the table? If so, that would make this question a 5x5, which is something we've never done (columns for S1, S0, Ai, Bi, Cin). This stuff is so confusing - sorry that I can't articulate better.

Other questions: Looking at my notes for a similar exercise, Xi is often Ai. Why? Where do these variables come from??
 

Answers and Replies

  • #2
lewando
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[function table]
Are you going to provide this?
 

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