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B.tech Microprocessor Papers PDF Download

B.tech Microprocessor Papers PDF Download

UNIVERSITY INSTITUTE OF ENGINEERING & TECHNOLOGY

MID- SEMESTER EXAMINATION -2017  CSJM KANPUR

ELECTRONICS & COMM. ENGG

SUB MICROPROCESSOR CODE: ECE-S 304/401 TIME 1:30

Note: Attempt all the questions. Attempt all sub-parts of a question at a place.

Q 1- Calculate, how many address lines and data lines are necessary to address 4 Megabytes of memory.

Q 2- Explain the status signals of the processor.

Q 3- Explain the working of DAA instruction with an example.

Q 4- What is a stack top? Explain XTHL with an example.

Q 5- Calculate the execution time of the following program if the crystal frequency of an 8085 system is 4MHz

 

LXI D, AB05H

 

L1:LDAX D

 

DCR E

 

JNZ

Q 6-     LXI SP, 0010H

LXI D, 0040H

LXI B, 0030H

LXI H, 0020H

DAD SP

SPHL

XCHG

L:        DCX D

MOV A, H

ORA E

JNZ L

After the execution of the following program, whether the loop will be executed or not. If executed then how many times this loop will be executed, Give the proper reason and necessary calculation.

Q 7- A block of 10 bytes is present in memory from location ABCD H.Write an ALP to arrange this data block in reverse order from the location DCBA H.

Q 8- 20 data bytes are stored from memory location 4000 H onwards. Write an ALP to find the even and odd numbers and if the numbers are even then store it from 5000 H onwards otherwise, store it from 6000H onwards.

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