Please find important questions from Unit_5
Part A (2 Marks)
1.
What is difference
between watch dog timer and ordinary timer?
2.
What is the need for
de-bouncing the keyboard?
3.
How do you calculate baud rate for
serial communication for 8051?
4.
Specify the two types of
serial communication.
5.
State the difference
between RET and RET1 instruction in 8051.
6.
Differentiate
Timers and counters. Draw TCON and illustrate
7. List
the registers used for Serial programming in 8051
8. A
count value of FFFBH is loaded into TH0 and TL0 registers, Determine the delay
generated by Timer 0 in Mode1
9.
What is the difference
between SJMP and LJMP
10. What
is the necessity to interface DAC with micro controller?
11. Differentiate between microprocessor and microcontroller?
12. Define XTAL1 and XTAL2.
13. What are register banks in 8051 microcontroller?
14
Differentiate RRA and RRCA instruction in 8051 microcontroller.
15. Draw the format of PSW of 8051.
16.
What is SFR?
17. Draw
the interfacing diagram of LCD with 8051 controller
18. Specify
the two types of serial communication.
Part B (16 Marks)
1.Draw the diagram to
interface a stepper motor with 8051 microcontroller and explain also write an 8051 ALP to run the
stepper motor in both forward and reverse direction with delay
2. Explain 8051 serial
communication modes with associated registers.
Write an ALP to asynchronously
transmit the string “ARUN” using Timer1 mode 2 to set Baud rate
3. Explain different
modes of operation of 8051 Timers with its associated registers. Write an 8051 ALP to
generate 50% Duty cycle square waveform on P2.7. Use timer 0 Mode 1 to generate
delay.
4. Draw the circuit diagram to
interface a matrix keyboard with microcontroller and explain the algorithm of
how microcontroller recognizes the key-press with flowchart.
5. Draw the circuit diagram to interface an
LCD with microcontroller and explain how
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to display the data using LCD.
6. Write
a program to generate the square, triangular and trapezoidal waveforms using
8051 microcontroller
7. Write
a program to interface a sensor device with 8051 microcontroller
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