Microprocessor & Microcontroller 2 - May 2012

Electronics Engineering (Semester 6)

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) Explain rotate instructions of PIC18F microcontroller.(5 marks) 1 (b) Explain flag register of 8086 microprocessor.(5 marks) 1 (c) Explain MOVLW and COMF instructions in PIC 18.(5 marks) 1 (d) Explain the need of handshaking signals used with various modes of 8255PPI.(5 marks) 2 (a) Explain working and interface of numeric data processor 8087 with 8086.(10 marks) 2 (b) What are the different functional blocks of 8259 Programmable Interrupt Controller? Explain their role in process of interrupt handling.(10 marks) 3 (a) Discuss in brief, the memory organization of PIC18F microcontroller. What is the purpose of processor stack?(10 marks) 3 (b) Give two examples of each type of addressing modes in 8086 given below:-
(i) Direct addressing.
(ii) Based addressing.
(iii) Implicit addressing.
(iv) Immediate addressing.
(v) Based and Indexed addressing.(10 marks) 4 (a) Draw and explain 8086 system operating in maximum mode.(10 marks) 4 (b) Write a program to perform 32 bit x 32 bit multiplication.(10 marks) 5 (a) Explain different addressing modes of PIC18F. (10 marks) 5 (b) Draw timing diagrams for minimum mode of 8086 -
(i) Read bus cycle.
(ii) Write bus cycle.(10 marks) 6 (a) Explain any two applications of timer in PIC18F and write a program to calculate delay of 100?s (Frequency is 40MHz).(10 marks) 6 (b) Design 8086 based micro computer system using minimum mode owing specifications -
(i) CPU working at 5MHz.
(ii) 32kb SRAM (16kb x 8 devices)
(iii) 32kb EPROM (8kb x 8 devices)
Draw neat schematic and use exhaustive decoding. (10 marks)

Write Short Notes on:-

7 (a) PIC 18 Reset.(5 marks) 7 (b) Comparative study of salient features of 8086 and Pentium. (5 marks) 7 (c) DMA Controller modes.(5 marks) 7 (d) Mixed Language programming. (5 marks)