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Seat No.: Enrolment No.:
GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING SEMESTER -VI • EXAMINATION SUMMER 2018
Subject Code: 361704 Date: 05/05/2018
Subject Name: Microcontroller
Time:10:30 AM to 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Each question carry equal marks (14 marks)
Q.1

Compare microprocessor and microcontroller with its block diagram.
07



07

Draw architecture of 8051 microcontroller and list its hardware features.




Q.2

List addressing modes of 8051 and explain each with necessary examples.
07



07

How many ports are there in 8051? explain any two ports with its internal structure.




OR

Explain TCON TMOD special function register in 8051 microcontroller.
07

TMOD
Q.3

Compare MOVX and MOVC with examples.
07


MOVX MOVC
07

Explain following instructions:
ADDC A,R0 RLC XCH A,R0 MUL AB MOV A,R7
CPL C CLR P1.2



ADDC A,R0 RLC XCH A,R0 MUL AB MOV A,R7
CPL C CLR P1.2

OR
Q.3

Compare XCHD and SWAP with examples.
07


XCHD SWAP
07

List and explain four conditional instructions with examples.




Q.4

Explain PUSH and POP instructions with suitable examples.
07
2/2


PUSH and POP
07

Write a programme to load R0 with data 28H transfer content of R0 and internal memory location 28H to external memory locations 2000H and 2001H


R0 28H R0 28H 2000H 2001H

OR
Q.4

Explain IP and IE special function register with functions of each bit.
07


IP IE
07

If A=38H, B=FFH and R1=58H than perform following operations and write result in accumulator in each case ANL A,#69H CPL A XRL A,R1 ORL A,B


A=38H, B=FFH R1=58H ANL A,#69H CPL A XRL A,R1 ORL A,B

Q.5

Draw interfacing diagram A/D Converter with 8051 microcontroller and explain in brief.
07



07

Draw interfacing diagram LCD Display with 8051 microcontroller and explain in brief.


LCD

OR
Q.5

Draw interfacing diagram D/A Converter with 8051 microcontroller and explain in brief.
07



07

Design interfacing diagram of external 32 KB RAM and 16 KB ROM with 8051 microcontroller and explain in brief.


32 KB RAM 16 KB ROM