Manonmaniam Sundaranar University (MSU) 2010 B.Sc Electronics Manonmanium Sundaranar University - Question Paper

Code No. 1341 Sub. Code: 3EL61
B.Sc. DEGREE EXAMINATION, APRIL 2010
ELECTRONICS
Sixth Semester
MICRO CONTROLLER
(For those who joined in July 2006 and 2007)
Time: three Hours Max. Marks: 100
part - A (10 x one = 10 Marks)
ans ALL the ques. select the accurate ans
1. A microprocessor contains
(a) RAM (b) ROM
(c) I/O ports (d) none of the above
2. 8051 is a __ bit micro controller.
(a) 4 (b)8
(c) 12 (d) 16
3. Which of the subsequent is a high level language?
(a)C (b) BASIC
(c) PASCAL (d) All the above
4. Which 1 of the subsequent flags is set,
whenever the outcome of a signed number
operation is too large?
(a)CY (b)AC
(c)P (d)OV
5. Indicate the instruction associated with BCD addition.
(a)ADDC (b)DA
(c) SWAP (d) All the above
6. LJMP is a __ byte instruction.
(a)l (b)2
(c)3 (d)4
7. Which timer of 8051 is used to set the band rate?
(a) Tinier 1 (b) Timer 0
(c) Both (a) and (b) (d) None of the above
8. The transfer of data using parallel lines is __ but __.
(a) slower, less expensive
(b) faster, less expensive
(c) faster, more expensive
(d) slower, more expensive
9. If D3 - Do = 0111 is the data learn from the columns, which column does the pressed key belong to?
(a) Column 0 (b) Column 1
(c) Column two (d) Column 3
10. DAC 808 is a __ output D-to-A converter.
(a) current (b) voltage
(c) Both (a) and (b) (d) none of the above
part - B (5 x six = 30 Marks)
ans ALL the ques. choosing either (a) or (b)
11. (a) List the important features of 8051 MC. (or)
(b) define the organization of external memory in 8051.
12. (a) explain the CALL instructions of 8051.(or)
(b) Write a time delay program and compute the delay, assuming a crystal frequency of 11.0592 MHZ.
13. (a) Write a program in 8051 to get the x value from PI and send x2 to P2 continuously.
(or)
(b) Write a program in 8051, to add 2 8-bit numbers.
14. (a) discuss memory space decoding. (or)
(b) How will you test the design of microcontroller?
15. (a) discuss the working of a successive approximation ADC.
(or)
(b) How will a keyboard be interfaced to 8051?
part - C (5 x 12 = 60 Marks)
ans ALL the ques. choosing either (a) or (b)
16. (a) discuss the architecture of 8051 with a block diagram.
(or)
(b) explain the serial data Input/Output interrupts in 8051.
17. (a) explain the different addressing modes of 8051, with suitable examples.
(or)
(b) explain the data transfer and Bit manipulation instructions of 8051.
18. (a) Write a program in 8051 (i) to subtract 2 8-bit numbers (ii) to multiply 2 8-bit numbers
(or)
(b) Write a program in 8051, to obtain the biggest number of an array.
19. (a) Write note on;
(i) Memory mapped I/O , (ii) Memory decoding
(or)
(b) explain the basics of serial data communication.
20. (a) discuss how a DAC is interfaced to 8051.
(or)
(b) explain how a stepper motor is interfaced to 8051.

Earning:   Approval pending.