M.Sc. (Electronic Science)(Semester (CBCS) Examination, 2017
MICROPROCESSORS AND MICROCONTROLLERS
Day Date: Thursday, 20-04-2017 Max. Marks: 70
Time: 10:30 AM to 01.00 PM
N.B. Q. No. and are compulsory.
Attempt any three from Q. No.
All questions carry equal marks.
Use of non programmable calculator is allowed.
Q.1 Select the most correct alternative: 08
1. Which of the following instruction is an example of the direct
addressing mode?
MOV @R0 MOV R0, #10H
MOV 10H, A MOV R5, A
2. Which instruction cannot force the 8086 processor out of
state?
Interrupt request Reset
Hold Both a and b
3. 8086 can access up to memory locations.
2MB 1 MB
4 MB 8 MB
4. The 8086 has queue pipelined architecture.
4 byte 4 bit
8 byte 16 bit
5. Which command enables the PIC microcontroller to enter into
the power down mode during operation of watching timer

SLEEP RESET
STATUS CLR
6. Which operational feature of PIC allows it to reset especially
when the power supply drops the voltage below 4
Built-in Power-on-reset Brown-out-reset
Both a b None of the above
7. PIC microcontroller has address bus for data Memory.
32 bytes 8 bytes
12 bit 128 bytes
8. In 8086, BIU prefetches the instruction from memory and store
them in
Stack Register
Memory Queue
Page 1 of 2
State true or false: 06
1. Physical address in 8086 microprocessor is the 20 bit address.
2. The 8086 has external clock generator.
3. In minimum mode operation of 8086 microprocessor, the
control signals are issued by the 8288 bus controller.
4. The PIC microcontroller has Harvard architecture.
5. The PICI 18 contains a program stack that stores up to 41
return addresses.
6. Polling interrupt in microcontroller can continuously monitor the
status of a given device.
Q.2 Answer the following. 14
Explain the interrupts of a PIC microcontroller. 05
Briefly explain the minimum mode configuration of 8086. 05
List the features of PIC 18FXXXX microcontroller. 04
Q.3 Explain the addressing modes of 8086 with the help of examples? 10
Write an ALP in 8086 to find a sum of numbers in array? 04
Q.4 Explain the branching and looping instructions in 8086 with
suitable example for each.
10
Describe any four assembler directives used in 8086 assembly
language programming.
04
Q.5 Draw and explain the pin configuration of 8086 and explain the
function of each.
10
Write an assembly language program for multiplication of 16- bit
number using 8086 instructions.
04
Q.6 Give a detailed account of the architecture of PIC microcontroller. 10
Write a note on overview features of PIC 18F microcontroller. 04
Q.7 Interface a smart LCD to PIC microcontroller. Write the ALP for
interfacing.
10
Explain the watchdog timer of PIC microcontroller. 04