Processor Architectures & Interfacing - Dec 2014

Information Technology Engineering (Semester 4)

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.

Answer any one question from Q1 and Q2

1 (a) State instruction example for the following addressing modes of 80386 showing physical address generation:
(i) Direct
(ii) Based indexed
(iii) Scale indexed with displacement.(6 marks) 1 (b) Draw the general segment descriptor format. Explain how G (granularity) bit affects the LIMIT field.(6 marks) 2 (a) Compare and contrast:
(i) .COM and .EXE
(ii) NEAR procedure and FAR procedure.(6 marks) 2 (b) Explain with suitable control signals, the timing diagram of a non-pipelined write cycle of the 80386 processor.(6 marks)

Answer any one question from Q3 and Q4

3 (a) Draw and explain Programmer's model of 80386 in protected mode operation.(6 marks) 3 (b) What is privileged instruction ? Explain two examples of it.(6 marks) 4 (a) State and explain the difference between all operating modes of 80386.(6 marks) 4 (b) Explain IDT of 80386 in detail wih diagram and format.(6 marks)

Answer any one question from Q5 and Q6

5 (a) Draw and explain Architecture of 8051 Microcontroller.(7 marks) 5 (b) Explain any three addressing modes in 8051 microcontroller with example.(6 marks) 6 (a) Explain the following instructions in 8051:
i) ORL A, #36
ii) MUL AB
iii) SWAP A.(6 marks) 6 (b) Explain program status word (PSW) in 8051 microcontroller.(7 marks)

Answer any one question from Q7 and Q8

7 (a) State and explain SFR's required for serial communication in 8051 microcontroller.(7 marks) 7 (b) Draw and explain TCON and TMOD SFR's of 8051 microcontroller.(6 marks) 8 (a) List and explain an two operating modes of Timer of 8051.(7 marks) 8 (b) Explain different types of interrupt in 8051.(6 marks)