331-F09-exam_1-solutions

331-F09-exam_1-solutions - ECE 331 Fall 2009 Exam I 100...

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Unformatted text preview: ECE 331 Fall 2009 Exam I 100 Points 50 Minutes CLOSED BOOK - CLOSED NOTES Problem Pa e s Value Score 1 l 20 2 2-3 37 3 4 17 4 5 10 5 5 6 6 6 10 TOTAL Instructions: 1. Check to be sure that you have all 6 pages. 2. Work only in the spaces provided. 3. Keep your eyes on your own work. Cheating will be dealt with to the full extent of University policy. PRINT NAME: ms; SECTION NO.: l. (20) Short Answers. Use only the space provided. a. Develop the truth table for the tri~state device shown below. (4) b. What is the base—lOrange for a 5—bit, 2’s complement number? (2) a: . “ms t ; , ~25 E "t" 2g- mi wwws'ig} .x ems ' a «fif’DeMorgan’s Law for n-variables. (6) g r a g {final fiat-vi “5 figs; ‘3; gist:ng is gas}; ‘3?“ “H d. What four features should you look at first when choosing a new microcontroller for a given application? (4) e. What is the minimum number address bus lines necessary t address 195210 individual 8-bit wide memory locations? (2) “m”? Eff/4%. 5952 g s g; W W f. If a given microprocessor can address up to K memory locations, how wide (in bits) must an address be? (2) 2533: (a tug? gmel’wb E 2. (37) Application of Arithmetic Principals. A. (8) Convert the following to 16—bit 2’s complement format. Give answer in hexadecimal notation. 25f) géfi , ‘ "2“ Z _ I 9 vi 359710: E EV agar; 2:» 51W» in «E‘- flss gas “it Efiiatiea 2 3532—5 B. (8) Find the base-10 value considering the following asl6-bit, 2’s complement number given in hexadecimal notation. CBE016= t” igfiiiii Mae gait Etta; agate «was. it; any: in we teams; ass-z: .2: 322%: are was: is $2.", "are? we 333.2%in C. (21) Consider the following hexadecimal strings. Perform the indicated arithmetic as the 68HC12 would do it and determine the final values of the indicated flags. Show all work and give your answers in hexadecimal. (7 points each) i.E3—CB Cg; W7C) mtg We @fiti we}? 3. (17) Consider the following 3—Variab1e function: F(X,Y,Z) = (Z + XY') + (X + Z)‘ A. (6) Manipulate the function to a canonical minterm form and express as 21110). : Er: sway? mfg 3 E2 Eases? awsffi 9 ms) forms. POS (product—of—su ><\ . .i g a Ema; '5; X as: a; Z w > s 5%; _ é , i i 5' Eta/:th 3" X +‘ '3‘?” gm, i§ if? :05 W E a w a , , ~ w " Em m swam % {am as; C. (3) Express the function in a minimum NAND form. é a ., ‘37" x was “‘8 FA 2m: X *i’ an é K433 5w» “’33 W“ .‘ g , a; s a 5 ’ g; a ’ *r r ' g ML: flex?» :5 aw geysfivga, 4 A ; Mg pi! fflflsfi’g g a: s g 5:} fl 3 & fw‘é “civil” if 354 g {Mag r 4. (10) Design a 1—bit controlled complementer circuit using only AND, OR and NOT gates. You do not have to draw the circuit; just provide the minimum form equation in SOP or POS (your choice). ‘ f‘» 5. (6) Fill in the names (indicated by numbers 1-6) of the components of the standard Von Neumann architecture model shown below. 6. (10) Laboratory Related Question: Consider the NAND form equation F(A,B,C) = (A‘C) + (AB). Prove by use of a K—map that the function is in minimum form and show the wiring diagram to implement the function on the 7400 quad 2—input NAND chip shown below. On the right are inputs A, B and C. Use pin 6 as the output, F. Also, include the power and ground connections shown on the bottom left. Q) n/g g??? f g to answer? $5 5Volt GNDWWMWMWWW ...
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331-F09-exam_1-solutions - ECE 331 Fall 2009 Exam I 100...

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