Microprocessor B.tech Paper 2020 Kanpur University

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UNIVERSITY INSTITUTE OF ENGINEERING & TECHNOLOGY
END-SEMESTER EXAMINATION 2020
B.TECH IIIrd YEAR
ELECTRONICS & COMMUNICATION ENGINEERING MM:40
SUB: MICROPROCESSOR CODE: ECE-S 304/401 TIME: 03Hrs
Note - Attempt all Sections as directed.
Section- A
Note-All questions are compulsory. Each question carries 2 marks.
Q 1- Explain in brief the working of the instruction XTHL with example & also nd the machine Cycle &T states.
Q 2- Draw a schematic with an explanation to demultiplex the bus AD7- AD0 using D type latch 74LS373.
Q 3- write program to generate a square wave of frequency 2 kHz on Pc6 pin of 8255. System CLK frequency is 3 MHz.
Q 4- Explain the ag register of μP 8086.
Q 5- Explain the various operational command words of 8259.
Section-B
Note - Attempt any Six questions. Each question carries 3 marks.
Q 6- Design memory with following address range for 8085 system EPROM 8000 TO 8FFFH, RAM A000 TO AFFFH Memory
devices available - EPROM 2KX8 AND RAM 4K X4. Use suitable decoder for chip select logic circuit.
Q 7- Draw the timing diagram for instruction IN CD H by showing all the control and status signals.
Q 8- Explain all the internal registers of 8259.
Q 9- Draw the interfacing circuit to connect 7- segment display digit with 8085 using 8255. Also write the program to
display E.C.E.( E.C.E in 7– segment display) after every 20 milli- -seconds if system CLK frequency is 3 MHz.
Q 10- Write an ALP in 8086 to nd out the average of the elements of an array.
Q 11- What is the function of I(NTA)' in the operation of 8259? Explain it by suitable example.
Microprocessor B.tech Paper 2020
Kanpur University
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Q 12- A block of data is stored in memory from location 2050 H onwards and the length of data block is present in
memory location 204F Write an ALP in 8085 to store all the Even numbers from location 3000 H onwards and store
all the Odd numbers from location 3100 H onwards.
Section- C
Note- Attempt any Three questions. Each question carries 4 marks
.
Q 13- Explain the various types of Interrupts of μP 8085 and also explain all the instructions which is related to
Interrupt control.
Q 14- Explain, with example, the various addressing modes of μP 8086.
Q 15- Draw the interfacing circuit to connect 12 - bits ADC with 8085 using 8255. Write a program to read digital
(ADC) data using interrupt driven I/O and store the reading in memory from location 2200 H onwards and also
multiply this data and store the result in memory in sequence.
Q 16- Draw the interfacing to connect single 8259 with 8085 system and write the program to initialize 8259 so
that vector location for IR0 will be 9CC0 H. There is 4 byte spacing in vector location and edge-triggered interrupt
request.

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Microprocessor B.tech Paper 2020 Kanpur University
UNIVERSITY INSTITUTE OF ENGINEERING & TECHNOLOGY END-SEMESTER EXAMINATION 2020 B.TECH
IIIrd YEAR ELECTRONICS & COMMUNICATION ENGINEE...

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