STUPIDSID
VTU Electronics and Communication Engineering (Semester 4)
Microcontroller for Embedded Systems
December 2012
Microcontroller for Embedded Systems
December 2012
1 (a)
Mention the difference between RISC and CISC processor.
6 M
1 (b)
Explain function of following pins of 8051:
i) EA
ii) ALE
iii) PSEN
iv) RST
i) EA
ii) ALE
iii) PSEN
iv) RST
6 M
1 (c)
Explain the internal memory organization of 8051.
6 M
2 (a)
With necessary examples, explain immediate, bit direct and indexed addressing mode of 8051.
6 M
2 (b)
Explain the effect of following instructions:
i) MOVX A, @dptr
ii) DJNZ R3, next
iii) DA A
iv) LJMP label
i) MOVX A, @dptr
ii) DJNZ R3, next
iii) DA A
iv) LJMP label
8 M
Write a program segment to realize following:
2 (c)
i) Exchange contents of external data memory 8100 h with contents of internal data memory 40 h.
ii) Exchange contents of A-register and B-register using stack
ii) Exchange contents of A-register and B-register using stack
6 M
3 (a)
What do you understand by assembler directives? Explain the following assembler directives:
i) ORG
ii) END
iii) EQU
i) ORG
ii) END
iii) EQU
8 M
3 (b)
Write an ALP to convert a 2-digit BCD number to binary.
6 M
3 (c)
Write a delay program to generate a delay of 10 ms. Assume a crystal of 11.0592 MHz. Show delay calculation clearly.
6 M
4 (a)
Explain the usage of the port pins of 8051.
6 M
4 (b)
With necessary interface diagram, write a C program to generate a triangular wave using DAC interface.
6 M
4 (c)
With necessary interface diagram, write a program to display "VTU2012" on a LCD interface.
8 M
5 (a)
Mention the difference counter mode and timer mode of operation. With necessary format, explain the various bits of TMOD-SFR.
6 M
5 (b)
Write an 8051 C program to generate a square wave of 2 kHz using timer 1, mode 2. Show the calculations clearly. Assume a crystal frequency of 11.0592 MHz.
8 M
5 (c)
Explain the interrupts of 8051 clearly mentioning the vector address and priorities.
6 M
6 (a)
Explain the various modes of serial communication operations.
6 M
6 (b)
Write a program to transmit a message "VTU" serially at a band rate of 9600. Take crystal frequency as 11.0592 MHz.
8 M
6 (c)
Explain with a neat diagram, the functional block diagram of 8255.
6 M
7 (a)
With necessary block diagram, explain the architecture of MSP 430.
8 M
7 (b)
Explain clock system of MSP 430.
8 M
7 (c)
Explain the use of registers PxDIR and PxOLT.
4 M
8 (a)
Explain various low power operations modes of MSP 430.
10 M
8 (b)
Explain the bits of TCON register. Write an 8051 C program to toggle only bit P1.5 continuously every 50 msec. Use timer 1 to generate the delay. Assume XTAL=11.0592 MHz.
10 M
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