L23 - CS61C L23 Combinational Logic Wawrzynek, Fall 2007...

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Unformatted text preview: CS61C L23 Combinational Logic Wawrzynek, Fall 2007 UCB 10/19/2007 John Wawrzynek (www.cs.berkeley.edu/~johnw) www-inst.eecs.berkeley.edu/~cs61c/ CS61C Machine Structures Lecture 23 - Representing and Designing Combinational Logic Circuits 1 CS61C L23 Combinational Logic Wawrzynek, Fall 2007 UCB Combinational Logic (CL) circuits Our previous adder circuit is an example. Output is a function of the inputs only. Similar to a pure function in mathematics, y = f(x). (No way to store information. No side effects) If we change X, Y will change immediately (after a short delay). Very important: This is not like a function call! F is active and doing what it does continuously. It is not invoked or called. y i = f i (x0 , . . . . , xn-1), where x, y are {0,1}. 2 CS61C L23 Combinational Logic Wawrzynek, Fall 2007 UCB Truth Tables Uniquely Defne CL Function 3 CS61C L23 Combinational Logic Wawrzynek, Fall 2007 UCB What do we need to know about CL?...
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L23 - CS61C L23 Combinational Logic Wawrzynek, Fall 2007...

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