Difference between revisions of "CSC270 Final Exam 2011"
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| − | ==Problem #1: Analysis, Design, Wiring, Testing, Operation ( | + | ==Problem #1: No 7442 chips (0.75 points)== |
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| + | Fictitious situation: You come to the lab ready to wire up your solution to a problem requiring you to implement a 3-bit output port for the 6811 and you discover that all the 7442 circuits have been taken away. You only have a limited time, and you cannot order or buy new ones. Your only solution is to use whatever is in the lab (FH143) to make your port work, as demonstrating the operation of your 3-bit output port is a required part of the assignment. Explain your solution to circumvent this unfortunate turn of events. Use logic diagrams in your explanations. | ||
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| + | You do not need to demonstrate the correct operation of your solution. | ||
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| + | ==Problem #2: 1/2 second delay (0.75 points)== | ||
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| + | In a recent lab you had to design an output port and activate two LEDs in such a way that the LEDs were on for 1 second at a time, then would switch state. | ||
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| + | Explain how you would design a similar solution, but when the delay is now 0.5 seconds. You can use whatever is available in FH143. | ||
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| + | You do not need to demonstrate the correct operation of your solution. | ||
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| + | ==Problem #3: Analysis, Design, Wiring, Testing, Operation (2.5 points)== | ||
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[[Image:CSC270 trafficLight.jpg | right | 150px]] | [[Image:CSC270 trafficLight.jpg | right | 150px]] | ||
*Using the 6811 or a state-machine made of D-flipflop, wire up a circuit that controls the three lights of a traffic-light (Green, Orange, Red). | *Using the 6811 or a state-machine made of D-flipflop, wire up a circuit that controls the three lights of a traffic-light (Green, Orange, Red). | ||
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You cannot ask anybody to help you debug the wiring. No debugging help from the instructor either. The goal of this exam is for you to show that you can go from the formulation of a problem to a working hardware solution '''on your own'''. | You cannot ask anybody to help you debug the wiring. No debugging help from the instructor either. The goal of this exam is for you to show that you can go from the formulation of a problem to a working hardware solution '''on your own'''. | ||
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===The reduced-point options=== | ===The reduced-point options=== | ||
| − | * You can pass on the wiring part of this problem and get at most 1 | + | * You can pass on the wiring part of this problem and get at most 1 out of 2.5 points for the whole problem by turning in the written part. |
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| − | + | * You can simplify the design to use only one switch for a maximum of 2 out of 2.5 points for this whole problem. | |
| − | + | * You can simplify some more the design and implement only three blinking lights with no switches for 1.5 out of 2.5 points. | |
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Revision as of 08:08, 19 April 2011
--D. Thiebaut 10:24, 13 April 2011 (EDT)
This final exam is take-home. It is open-books, open-notes, and open-Web. It is due a week after it is made available, at 4:00 p.m. on Wed. May 4, 2011.
You cannot discuss the details of this exam with anyone except your instructor. No question will be answered in person after 2:30 a.m. on 4/29/11. Instead, if you have questions regarding the exam, you are to send them via email to thiebaut@cs.smith.edu, and the question and its answer will be broadcast back to the hole class via email.
The exam is given under the rules of the Smith College Honor Code.
Make sure you reference all work/resources you use to answer the questions below.
