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Eighth Semester B.E. Degree Examination, Dec.2013 lJan.20l4

g lt -- I \-\,E PART _ B !I4I CEHTRAL IcI4

Embedded System Design

' == 'f,m€i 3 hrs. Max. Marks:1.,.0,O,

""7d"."i;..,..- Note: Answer FIYEfull questions, selecting',"..,,',-,.' at leost TWO questionsfrom each part. i 1,,,,,:,t,

,i-l.g rr-', , ..*,t:".E ..=...:::.:r.,. PART - A€ I a. L[st a. pair of design metrics that may compete with one another, prodding an intuitiveE explbnbtion of the reason behind the competition. $u ir (06 Marks)

'f; b. W^hat it-""--rq#k"a window? Derive the percentage revenue loss .qrrilil"for any rise angle,o'E rather theiqi4ist for 45 degrees. ",,'; " (08 Marks)

E E c. For a particular product, you determine the NRE cost and unit',cobt to be the following forH= the three listed IQ technologies: '

t 5 FBGA: ($10.00G,$s0), ASrC: ($50.000, $10). {LSI: ($200,000, $5).i .' Determine precise volqgnes for which each technology yields the lowest totalcost. (06 Marks)oolt r -

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f; ; 2 a. List and define three main Or.jCF technologies:..H,ow are the benefits of using each of three

; : different design technologies trelpful to desigrqrs? (06 Marks)t()

; E b. What is single-purpose processor? What are the benefits of choosing a single-purposeq A processor over the general purpose proiessor? (04 Marks)

f € c. Design soda machine controller,. g{ven thqt soda coats 75 cents and your machine acceptsI 5 ouarters only. Draw the blackrhx'view, coryre with a state diagram and the state table,b u . :'.-:-; ! minimize the logic and then

ff46+4he final ciidffifl.= (10 Marks)

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: E 3 a. What is meant by pipelinihi? And why it is used in insiiuction execution? t06 Marks)

€ € b. Explain in detail the general software design tooh that are used by embedded system-+ i designers. -,ti (06 Marks)

E * c. Distlnguish in b€t,fueen timer and counter. '''r,i'"".,',, (04 Marks)

+ $ d. Explain in detail the operation and initialization sequence of LCD* (04 Marks)5rdav"l

9 E 4 a. Givq-11-''.5- iOO UHz crystal-controlled oscillator and a 32-bit and ml,rtnumber of 16-bitE E teffihl-count timers, design a real-time clock that output the date and time down to(c E -----e--

= # rnttrliseconds. You can ignore leap years. Draw a diagram and indicate termi4$rpount values

AF" " for alltimers. (06 Marks)

5 g b. How-to control the speed of DC motor by using PWM? loo naa'6

E H "..";' .. Given an analog input signal whose voltage ranges from -5 to 5V, and 8-bia.difritalq :, " encoding, calculate the correct encoding l.2Y and then trace the il]Egq.iye approxirfr#ion.

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; encoding, calculate the correct encoding l.2Y and thentrace the ilfgges{ye approxirfmtio*6 € approach to find the correct encoding.

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(08 Marks).-N'

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E 5 a. What is interrupt latency? Ard explain ttre fuctors affecting t,\l*\ LIBRARY j\; J;peMarks)E b. Explain briefly the operation of round-Robin with intemrptr. \\- .1i/ (06 Marks)

.T c. How to selecting an software architecture for your system affigffgld"o'#flacteristics ofvarious software architecture? *.s;z

(08 Marks)

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6a.b.

c.

^-_^306EC82

Describe the function of scheduler with suitable transition diagram. (06 Marks)Define semaphore and list oftried-and-ture ways to mess up with semaphores. (06 Marks)Explain the role timer function in RTOS. (08 Marks)

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