test2-spring2007

# test2-spring2007 - 2 to decimal 3(10 points Carry-lookahead...

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1 of 2 Boise State University Department of Electrical and Computer Engineering, EE 230 Digital Systems Test 2, Day: April 4, 2007, Location: ET 103, Time: 10:40am to 11:55am Name: ______________________________ Instructions : Show all steps and logic circuits for full or partial credits. It is very important that you write clearly, so that your test can be graded appropriately and fairly. This is a closed book and closed notes test. ABSOLUTELY NO calculator. 1. (20 points) Design the following function F using: f = BC + A B C + AB C + AB , with A as MSB, and C as LSB. a. one 4-to-1 multiplexer with other necessary basic logic gates, b. one 2-to-1 multiplexer with other necessary basic logic gates, c. one 3-to-8 decoder with necessary basic logic gate, and d. two-input LUTs. 2. (10 points) Convert the following numbers a. (215.56) 10 to binary b. (00101011.1011)

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Unformatted text preview: 2 to decimal 3. (10 points) Carry-lookahead adder versus ripple-carry adder a. which one uses more resources b. which one is faster c. which one is better 4. (10 points) 2’s complement representation is more suitable for use to represent negative numbers. Why? 5. (10 points) How many bits is the result when you ADD two 4-bit numbers? What is an overflow signal ( Explain what is overflow without using the word “overflow” )? How do you generate the overflow signal? Assuming this is an unsigned addition. 6. (15 points) a. what’s the main difference between latch and flip-flop? b. what is flip-flop setup time? c. what is flip-flop hold time? 7. (25 points) Complete the following timing diagram. Clock Resetn D Q Q w z 1 y 1 Clock Resetn D Q Q w z 2 y 2 2 of 2 Clock w y 1 z 1 y 2 z 2...
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test2-spring2007 - 2 to decimal 3(10 points Carry-lookahead...

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