week5a - Pocket Calculator Know how to implement the...

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Unformatted text preview: Pocket Calculator Know how to implement the arithmetic circuits What if you want to have some additional logic circuits: AND OR Addition Subtraction Need circuits to handle routing Standard Circuit Elements Develop implementations of important Building Blocks Used in Networks, Computers, Stereos, etc. Multiplexer: Combine N sources onto 1 wire Decoder: Determine which input is active Encoder: Convert binary to one-of-N wires Multiplexer An element that selects data from one of many input lines and directs it to a single output line Input: 2 N input lines and N selection lines Output: the data from one selected input line Multiplexer often abbreviated as MUX Multiplexer Implementation 4:1 MUX Multiplexer Expansion Construct a 16:1 MUX using 4:1 MUXs Multiplexers in General Logic Implement F = XYZ + YZ with a 8:1 MUX 8:1 MUX 1 2 3 4 5 6 7 S2 S1 S0 F Multiplexers in General Logic (cont.) Implement F = XYZ + YZ with a 4:1 MUX S1 S0 4:1 MUX 1 2 3 F Decoders...
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week5a - Pocket Calculator Know how to implement the...

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