Final Examination Solutions Fall 2011

PwnHero Final Examination Name: December 5,2011 Student #: Time limit:3 hours Examiners: V. Geurkov, L. Kirischian Notes: * A\*^,F \,rr" fu',rrshuctrcn :et a) closed oooo.-^.,^ ^^,^..r^e^_ \n fr.r*,t pr b) Simple arithmetic calculators are allowed. c) Complex programmable calculators, cell phones and WiFi connected devices are strictly prohibited driring the exam period. d) No questions during the exam. State any assumptions. e) Answer neatly all questions. Unclear answers will not be accepted. 0 For each question, show the process that is used to derive the answer. Correct answers without required explanations / calculations will not be accepted. g) Circle your professor's name and hand in these sheets. General Questions What makes a microcontroller different from a microprocessor? i) Internal CPU data registers and program counter (PC) ii) External memory units providing storage of programs iii) Embedded address and data bus to access memory iv) Embedded perinheral devices (norts. timers, AI)C. etc.) [1 mark] COE-538 / BME-538 - Microprocessor Systems L 1. lil.il $q,tol c.,NR'liu 2. The CPU bus consists of 20 address lines and 8 data lines. Answer to the following questions: a) The address space available for the ,r"*Sl}fr,H$.irt#ral devices is equal to: [1 mark] brnnrydiXi\ I oddrcs lt* \ \,ls ,. i) 65,536locations; ii) 64Klocations; iii) 256Klocations; iv) l024Klocations. Show your calculations below and circle the correct answer out of the listed above: Address area = 220 -ztox2ro=lo24K wJ Aa{ies hs )o \its b) How many E-clocks are necessary for the CPU to write a 32-bit result into memory, if each byte reading/writing cycle requires 4 E-clocks: i) 4 E-clocks; ii) 8 E-clocks; iii) 12 E-clocks iv) 16 E-clocks. Show your calculations below and circle the right answer out of the listed above: Number of clock cycles: 32 / 8:4 read/write w *Iu t* 0,so 2\?", i . L^L*LrL = 16 rrder*l anurqel*t {,r Rttese 'l- \b nunhus [1 mark] thyt"--tu{r p{ b{bx ffi=]6, s 32-\'ft reru[ : ifr -- t [.4"s t*il I -:''= E-daks PwnHero.com