Unformatted text preview: F(x,y,z) = Π (0, 3, 4, 5, 7) using one or more 8-to-1 multiplexers. c. (Extra Credit) F 1 (s,t) = Σ (1, 2) and F 2 (s,t) = Σ (0, 1) using one 8-to-1 multiplexer and logic gates. State all assumptions. Answer either question 4 or 5. Circle your choice. 4. (2 points) Why is priority required for encoders? Draw the truth table a four input priority encoder. Your encoder should have an enable input and an output that indicates data is available. What is the output of the encoder circuit when I 1 and I 2 are selected? 5. (2 points) What is the difference between a full adder and a half adder? Determine the sum and carryout (of MSB) for a 3-bit Adder-Subtractor circuit with the following inputs: M = 1, A = 011, B = 110. Write the mathematical equation the circuit is implementing. Question Score 1 /2 2 /2 3a /2 3b /2 3c /1 4 or 5 /2 Total /10...
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- Fall '06
- Binary-coded decimal, Prime number