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# 3441Lab4 - with the eight combinations and the theoretical...

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ECE 3441 Laboratory IV: Modular Design and Hierarchy Performed by Due October 26, 2007

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Goals of the Lab (1) To become more familiar with SimUaid. (2) To test and implement the “Full Adder” Circuit in SimUaid. (2) To test the operation of the macro-circuit “full-adder” in SimUaid. (3) To design a binary adder and subtracter using SimUaid. (4) To learn how to use switches in SimUaid. Procedures Step 1: Become familiar with section 4.7 from the text book. Implement and simulate the “Full Adder” Circuit in SimUaid using XOR, AND, and OR gates. Test the operation of the macro-circuit “full-adder” in SimUaid. Step 2: Design a circuit with two 8-bit inputs and a control input C using the full-adder macro. The design must be capable of adding or subtracting depending on the value of C. Create eight simulations which consist of the eight possible combinations. Draw a table
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Unformatted text preview: with the eight combinations and the theoretical and experimental results. Use switches for inputs. Xin Yin Sout Cout 11100101 11100001 11000110 1 11100101 00011111 00000100 1 00110101 00010111 01001100 00110101 11101001 00011110 1 11111000 01011011 01010011 1 11111000 10100101 10011101 1 00001111 10100101 10110100 00001111 01011011 01101010 Conclusion In this lab we learned how to design, implement, and test a full binary adder and subtracter using SimUaid. We also learned how to use switches as inputs and how to utilize the “full-adder” macro in SimUaid. In order for our circuit to perform the correct operation depending on the value of C we used a three-state buffer and multiplexer combinational circuit. Another lesson learned is how to create virtual connections in SimUaid to avoid messy circuits and drawing unnecessary amounts of wires....
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