Microprocessor B tech Paper 2020 CSJM Kanpur University
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.
Note-All questions are compulsory. Each question carries 2 marks.
Q 1- Explain in brief the working of the instruction XTHL with example & also find 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 flag register of μP 8086.
Q 5- Explain the various operational command words of 8259.
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 find 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.