M.Sc. (Semester (CBCS) Examination Mar/Apr-2018
Electronics
ADVANCED MICROCONTROLLERS
Time: 2½ hrs
Max. Marks: 70
Instructions: Attempt five questions. Q. 1 and 2 are compulsory. Answer any three questions from Q.3 to Q.7 Figures to the right indicate full marks.
Q.1
Choose the alternatives given below.
08
of PIC 16F877 is an 8-bit timer with a prescaler and a postscaler.
Timer 2
Timer 3
Timer 1
Timer 0
In Pulse Width Modulation mode of PIC microcontroller, the CCPx pin produces up to a resolution PWM output.
9-bit
8-bit
10-bit
None of these
register is used to configure USART of PIC 16F877 Microcontroller.
TXSTA
STATUS
PIE1
UDR
Each Port pin of PIC 16F877 Microcontroller sink or source
10
15
25
35
In AVR register forms 16 bit Z register.
R26-R27
R28-R29
R30-R31
None of these
of PIC 16F877 microcontroller has a weak internal pull-up.
PORTA
PORTC
PORTD
PORTB
AVR atmega8 Microcontroller has instructions.
95
100
135
35
Register is used to configure PORT of AVR as Input or Output.
DDR
TRIS
PIN
None of these
State True or false.
06
ADFM bit of ADMUX is used for Result Format Selection.
LD instruction of AVR helps to Store data in Memory from data of source memory address.
PORTA of AVR atmega8 has a weak internal pull up.
In PIC 16F877 microcontroller, If VDD falls below VBOR for longer 100μS, the brown-out situation will reset the device.
ADLAR of ADMUX is used to select result justification of ADC.
To select Bank 2 and 3 of PIC microcontroller at a time, the IRP bit of status register is set.
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SLR-UJ-324
Q.2
Answer any two of the following:
10
Write note memory structure of PIC 16F877 microcontroller.
Explain in detail interfacing of Optocoupler to PIC microcontroller.
Compare LP and ST instructions of AVR microcontroller.
Explain in detail DC motor controlling by using PWM techniques of PIC microcontroller.
04
Q.3
Write note on configuration of On-chip ADC of PIC microcontroller.
08
Explain in detail Watch Dog Timer of AVR atmega8.
06
Q.4
Explain in detail interfacing of LCD to AVR microcontroller.
08
Write a note on Timer 2 of PIC microcontroller.
06
Q.5
Write note on USART of PIC microcontroller.
08
Write note on Architecture of AVR atmega8 microcontroller.
06
Q.6
Write a note Interrupts of PIC microcontroller.
08
Explain firing of Relay using AVR microcontroller.
06
Q.7
Write note on clock and reset circuit of PIC microcontroller.
08
Write a note on features PIC16F877 microcontroller.
06