Research Essay

1562 Words Dec 30th, 2014 7 Pages
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Code No: RR321402

RR

SET-1

B. Tech III Year II Semester Examinations, December/January -2011-12 MICROPROCESSORS (MECHANICAL ENGINEERING(MECHATRONICS)) Time: 3 hours Max. Marks: 80 Answer any five questions All questions carry equal marks --1.a) What are various addressing mode in 8085 microprocessor? Explain with suitable example. b) Explain following instructions in detail with the help of examples. i) RAR ii) CPI data iii) CALL addr (Label) iv) SPHL v) XRI data. [8+8] 2.a) b) Draw the structure of 8086 flag register and explain the function of the flags with examples. Explain the function of the following instructions of 8086. i) IN ii) LAHF iii) LDS iv) XLAT v) XCHG [8+8] Discuss various branch instruction
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www.jntuworld.com

Code No: RR321402

RR

SET-2

B. Tech III Year II Semester Examinations, December/January -2011-12 MICROPROCESSORS (MECHANICAL ENGINEERING(MECHATRONICS)) Time: 3 hours Max. Marks: 80 Answer any five questions All questions carry equal marks --1.a) Discuss various branch instruction of 8086 microprocessor, that are useful for relocation? b) Write an 8086 assembly Language program to convert a BCD Number to a Binary Number. [8+8] 2.a) b) 3.a) b) What is an interrupt? Explain different types of interrupts supported by 8086 What are the priority-rules that follow to resolve the problem when two interrupt occurs at the same time? [8+8] Explain string manipulation instructions of 8086 with suitable examples. Write an assembly program to find out whether a given byte is in the string or not. If it is in the string, find out the relative address of the byte from the starting location of the string. [8+8] Distinguish between programmed I/O and interrupt I/O in case of 8086 processor. Interface an 8 × 8 key board using two 8255 ports and write a program to read the code of a pressed key. [8+8] What are the various steps involved in ADC interfacing? Interface ADC 0808 with 8086 using 8255 ports. Use port A of 8255 for transferring digital data output of ADC to the CPU and port C for

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