Kurukshetra University 2009-4th Sem B.Tech - Question Paper

BT-4/M09
Microprocessor and Interfacing
Paper: ECE-216E
time:three hours][maximum marks:100
Note:-attempt only 5 ques. by selecting at lowest 1 ques. from every unit.
UNIT 1

1.a) elaborate different addressing modes in 8085 microprocessor? discuss with suitable example. 10

b) write a program for multiplication of 2 16 bit numbers. 10


2.a) draw the internal architecture of 8085 processor. discuss in detail. 10
b)define an interrupt. define the interrupt response of an 8085 processor 10

UNIT 2
3.a) expalin the subsequent pins of 8086 micro processor.
i. BHE/S7
ii. RQ/GT
iii. MN/MX
iv. RD
v. TEST. 10

b) draw and explain the timing diagram of 8086 microprocessor during learn and write operation 10


4. discuss the subsequent instruction of 8086:
i. DAA
ii. RXR
iii. SAR
iv. IDIV
v. AAA 5x4


UNIT 3

5.a) discuss the 'mode0' of 8255 with control word and status word. also draw the timing diagram for the mode. 10.

b) discuss the block diagram of 8255. 10


6. a) draw an interface of 8255 with 8086 at 80H as an I/O address of port A. interface 5 7-segment displays with 8255. write an ALP to display 1,2,3,4 and five over the 5 display continuously as per their positions starting with one at lowest significant position. 10

b) b) discuss operation of Dual slope kind analog to digital converter with help of suitable diagram. 10

UNIT 4

7. a) draw the block diagram of 8253 and discuss the function of every block. 10

b) draw the pin diagram of 8259 and discuss the function of every block. 10

8. a) explain how 8253 is used to generate square wave. 10

b) explain the DMA process. Draw and discuss the block diagram of 8237 DMA chip. 10

Earning:   Approval pending.