Microprocessor B tech Mid Paper 2017 CSJM Kanpur University
SUB: MICROPROCESSOR (ECE-S304) (2k17) MM: 20
SEMESTER: Vth Mid Semester Examination Time: 1.5 Hrs
Note Attempt all the Questions. A calculator is not allowed. No opcode table is allowed.
Note: Attempt all the questions. Each Question carries 2 Marks.
Q 1- Explain the PSW with an example.
Q 2- Explain in brief the following instructions and also find the addressing mode of the instruction.
(i) RAL (ii) XRA A
Q 3- Write at least Four instructions that reset the Accumulator with proper explanation
Note: Attempt all the questions. Each Question carries 3 Marks.
Q 4- Calculate the execution time of the instruction SHLD Addr. it the crystal frequency of an 8085 system is 3MHZ. Also, explain the different machine cycles that execute by this instruction.
Q 5- After the execution of the following program. find the final value of registers A, D, E, H, L & Flag by showing the necessary calculations. The program is given below
MVI A, 35 H
ADI 20 H
MOV E, A
MOV D, A
LXI H, AAAAH
MOV A, H
Note: Attempt all the questions. Each Question carry 4 Marks.
Q 6- Interface 4 Kbytes EPROM and 2 Kbytes RAM with 8085 system. There should be 2 Kbytes space free between EPROM and RAM. The starting address should be 8000 H Memory devices available EPROM 4K X 8 and RAM 1K X4 Use suitable decoder for chip select logic circuit.
Q 7- Write an ALP to perform the subtraction X Y using 2’s complement method where X and Y are two, 16-bit numbers present in memory from 2000H onwards and 300e H onwards. Store the result in memory from 4000 H onwards.