Embedded System Design - Dec 2011

Electronics & Communication (Semester 7)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1 (a) what is market window?why is it important for products to reach the early in window ?justify.(8 marks) 1 (b) Explain how the top-down design process improves the productivity(6 marks) 1 (c) Using the revenue model of fig.q1(c) derive percentage revenue loss equation for any rise angle,rather than just for 45 degree? (6 marks) 2 (a) write a simple algorithms for finding the GCD of two integer numbers.write the FSMD for this algorithms Explain how it can be optimize.write the optimize FSMD and its advantages (10 marks) 2 (b) Briefly explains the purpose of the data path and controller,in a single purpose processor (10 marks) 3 (a) Explain how stepper is controlled using driver.Give relevent hardware and software details (10 marks) 3 (b) In successive approximation,ADC calculate the correct encoding of 5v,given an analog signal whos e voltage ranges from 0 to 15v and 8 bit digital encoding.also determine the resolution of the ADC.(10 marks) 4 (a) What is memory hireachy?how does the cache operate?Discuss the cache mapping techniques.List its merits and demerits (10 marks) 4 (b) Describe the j² and IEEE 802.11 protocols (10 marks) 5 (a) explains how the interrupt works in a microprocessor.with an example,explain the classic shared data problem ,when the data is shared between an interrupt and a task .(10 marks) 5 (b) Explain the real time OS architecture (5 marks) 5 (C) What is the interrupt latency?what factors affect it ?(5 marks) 6 (a) Explain with an example,how round robin architecture works.What is its limitation (10 marks) 6 (b) what are the three different states of tasks in RTOS?How is the state of each task tracked ?(5 marks) 6 (c) How does a typically RTOS binary semaphores works ?Explain.(5 marks) 7 (a) Mentioned the two rules of interrupt routine in an RTOS enviroment.With an example brifly expalin what happens each rule is violated.(15 marks) 7 (b) compare characteristic of the four software architecture for scheduling .(5 marks) 8 (a) Illustrate with suitable example the problems of 'delay embrace and 'priority inversion (12 marks) 8 (b) explain the method to solve the memory space and methods to save power.(8 marks)