M.Sc. (Semester II) (CBCS) Examination Mar/Apr-2018
Electronic Science
PIC MICROCONTROLLER
Time 2½ Hours
Max. Marks: 70
Instructions: Q.1 and Q.2 are compulsory. Attempt any three questions from Q. 3 to Q.7. All questions carry equal marks. Use of nonprogrammable calculator is allowed.
Q.1

Select the correct alternatives:-
08
PIC18Fxxxx is bit microcontroller.
4
8
18
32
is not true about PIC microcontroller.
It is a RISC microcontroller
It has Von-Neumann architecture
It has separate program and data memories
None of these
With 4MHz clock crystal, the execution time of PIC instruction is
1
0.1
10
¼
PIC register controls port I/O direction.
INDF
IODIR
TRISA
PCLATH
instruction/instructions do not clear the watchdog timer of PIC.
CLRWDT
CLEAR
SLEEP
both b and c
In PIC18Fxxxx devices the stack allows any combination of up to program calls and interrupts to occur.
6
8
16
31
PIC microcontrollers RETURN instruction takes machine cycles to execute.
1
2
4
8
device use SDA/SCL lines.
RS232
I2C
SPI
all of these
Q.1
B)State true and false
06
The Program Counter of PIC18Fxxxx device is 21 bits wide.
GOTO is a conditional jump instruction.
Most PORT pins of PIC microcontroller can drive LED directly.
For PIC18Fxxxx devices, the WDT is driven by the INTRC source.
PIC microcontroller is Reset by holding the MCLR pin high.
LM35 sensor is calibrated digital output temperature sensor.
Q.2
Give a brief account
A)List main features of PIC18Fxxxx microcontrollers.
05
B)Write a short note on PicKit2 kit.
05
C)Explain the need of optocoupler.
04
Q.3
A)Draw and explain the architecture of PIC microcontroller.
08
B)Write a program to generate square wave on PORTB_0 pin.
06
Q.4
A)What is the need of RESET? Explain the reset sources of PIC18Fxxxx microcontroller.
10
B)Explain the applications of Timer in embedded systems.
04
Q.5
A)Give a brief overview of MPLAB IDE.
10
B)Explain any two assembler directives.
04
Q.6
A)Design a humidity measurement system in RH% around PIC18Fxxxx microcontroller.
08
B)Write a program to transfer message "Hello" serially to PC with baud rate 2400, assume crystal frequency of 20MHz.
06
Q.7
A)Draw a schematic of DAC interfacing with PIC microcontroller and write a program to generate saw-tooth wave at the DAC output.
08
B)Draw schematic and write a program to drive Bicolor LED using PIC microcontroller.