Subject Code: 16EC2T01 R16
PRAGATI ENGINEERING COLLEGE :: SURAMPALEM
(AUTONOMOUS)
III B.Tech II Semester Regular Examination May-2019
MICROPROCESSORS AND MICROCONTROLLERS
(for EEE only)
Time: 3 hours Max Marks: 60M
Question paper consists Part-A and Part-B
Answering the Questions in Part A is Compulsory,
Answering any Four Questions from Part-B
Part-A
[6X2=12M]
1. a) If the stack segment register contains 3000h and stack pointer register contains
8434h,what is the physical address of the top of the stack in 8086 microprocessor?
b) Explain i)LEA ii)LDS/LES data transfer instructions of 8086 microprocessor.
c) Describe the Bit Set/Reset (BSR) mode of operation for 8255 using relevant
diagram.
d) List out the data types supported by 80386
e) List the salient features of 8051.
f) List the interrupts supported by PIC 16C61
Part-B
[12X4=48M]
2. a) Explain register organization of 8086? [6M]
b) Explain the salient features of Pentium Processor? [6M]
3. a) Explain memory addressing modes of8086? Give an example for each addressing
mode? [6M]
b) Differentiate between maximum mode and minimum mode of 8086. [3M]
c) Explain the different logical instructions of 8086 microprocessor. [3M]
4. a) Draw the block diagram of 8259 and explain each block. [6M]
b) Explain the architecture and operation of 8257 DMA controller with a neat block
diagram. [6M]
5. a) Write architectural differences between 80386 and 80486. [6M]
b) Explain the concept of segmentation and paging in 80386. [6M]
6. a) Explain about timers and counters in 8051. [6M]
b) Explain the working of 8051 oscillator and clock. [6M]
7. a) Explain Data conversions and data types in c for PIC? [6M]
b) List the interrupts supported by PIC 16C61 and discuss them in brief? [6M]
