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EE319K_FINAL_2009

# EE319K_FINAL_2009 - EE319K Fall 2009 Final Exam Version A...

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EE319K Fall 2009 Final Exam Version A Page 1 of 12 Jonathan Valvano December 15, 2009 First:________________ Last:____________________ This is a closed book exam. You must put your answers in the space provided. You have 3 hours, so allocate your time accordingly. Please read the entire exam before starting. Please read and affirm our honor code: “The core values of The University of Texas at Austin are learning, discovery, freedom, leadership, individual opportunity, and responsibility. Each member of the university is expected to uphold these values through integrity, honesty, trust, fairness, and respect toward peers and community.” (4) Question 1. You are working for an engineering firm and have been given the task to design a new DAC. After completing the design and construction of an initial prototype, you now have to test it. List four experimental parameters you will measure to evaluate the quality of your new DAC. These parameters will be measurable with test equipment, like you used in lab or like the professor/TAs demonstrated to you in this class. For each parameter, give both the name of the parameter and the definition of the parameter. You do not need to give the experimental procedure, rather simply list four names and four definitions of the parameters. I do not mean physical parameters like size, weight, or color. Furthermore, I do not mean economic factors like production costs, profit, mean time between failures, or maintenance costs. Part a) Give a parameter and its definition Part b) Give a parameter and its definition Part c) Give a parameter and its definition Part d) Give a parameter and its definition

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EE319K Fall 2009 Final Exam Version A Page 2 of 12 Jonathan Valvano December 15, 2009 (6) Question 2. What is the voltage V? V +5 20 k Ω 10 k Ω 10 k Ω __________ (10) Question 3. Write a C function to sample ADC channels 3 and 4 of the 9S12DP512. Assume the ADC initialized for a 10-bit sample, sequence length is 2, and the ADC clock is 1 MHz. Implement right-justified conversions, and return by value the larger of the two ADC samples.
EE319K Fall 2009 Final Exam Version A Page 3 of 12 Jonathan Valvano December 15, 2009 (15) Question 4. Write three C functions that operate the SCI0 module. (5) Part a) Write an initialization function that turns on both the transmitter and receiver for the SCI0. Set the baud rate equal to 38400 bits/sec. You may assume the E clock is 8 MHz. (5) Part b) Write a C function that outputs one ASCII character to SCI0 using busy-wait synchronization and call by value parameter passing. (5) Part c) Write a C function that outputs an ASCII string to the SCI0. You may assume the variable length string is null-terminated. Use call by reference parameter passing.

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EE319K Fall 2009 Final Exam Version A Page 4 of 12 Jonathan Valvano December 15, 2009 (5) Question 5. Write assembly code that implements the unsigned operation RegD = 0.3456*RegX, eliminating overflow and minimizing dropout errors. (5) Question 6.
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EE319K_FINAL_2009 - EE319K Fall 2009 Final Exam Version A...

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