Punjab Technical University 2004 B.E Electronics & Tele-Communication Engineering Microprocessors & its Applications - Question Paper

Microprocessors & its Applications
Instruction to Candidates :
1) Section - A is compulsory.
2) Attempt any 4 ques. from part - B.
3) Attempt any 2 ques. from part - C.
Dec. 2004


part - A (Marks : two each)
Q. one (a) Differentiate ranging from :
(i) Interrupt and Trap
(ii) Memory mapped I/O and I/O mapped I/O
(iii) Serial and parallel I/O
(iv) Microprocessor and Microcomputer
(v) LDA 2000h and STA 2000h
Q. one (b) List different modes of 8255.
Q. one (c) list different modes of 8254.
Q. one (d) What do you understand by Call and Return Instruction?
Q. one (e) The contents of A register is 04 h. What will be the contents of A register if a register is rotated right eight times ?
Q. one (f) Why 2’s complement method is used for representation of negative numbers in computers?
part - B (Marks : five each)
Q. 2 What do you understand by a microprocessor? elaborate its components? Draw the block diagram of 8085 microprocessor?
Q. 3 Discuss the different addressing modes of a 8086 Microprocessor with examples.
Q. 4 Write an assembly language program to multiply 2 unsigned number.
Q. 5 Write an assembly language program to divide 16 bit Unsigned number with eight bit unsigned number.
Q. six Differentiate ranging from RIM and SIM instruction.
part - C (Marks : 10 each)
Q. 7 Draw the block diagram of 8085 and discuss the function of every pin.
Q. 8 (a) Write an assembly language program to transfer two k of bytes of data from memory location 2000h onwards to peripheral onwards using DMA controller. presume CH0 address =d0h, Ch0 TC = d1h, Mode set register =d8h.
(b) List different hardware and software interrupts of 8085 along with their addresses. provide their priority in case of hardware interrupt.
Q. 9 (a) Write down control word in Mode 0 for the subsequent 8255 :
Port A Port B Port C
0 0 0
0 0 1
0 1 0
0 1 1
Where 0 stand for output and one stand for input ?
(b) Draw the block diagram of 8279 and discuss its different block.

Earning:   Approval pending.