Rashtrasant Tukadoji Maharaj Nagpur University 2009 B.E Electronics & Communication Engineering Summer , Faculty of Engineering and Technology, MICROPROCESSOR AND INTERFACING - Question Paper

part A

1. (a) describe SSI, MSI, LSI, low level language, high level language.
(b) Differentiate ranging from absolute and partial decoding with suitable example.
(c) describe byte, nibble, word.

2. (a) discuss with example addressing modes of 8085.
(b) Draw and discuss how control signals are generated and how demultiplexing scheme is implemented in 8085.
(c) discuss briefly any 3 assembler directives used in 8085.

3. (a) Draw the timing diagram of LDA 9000H.
(b) Write a program to organize the provided series of eight bytes in descending order. presume suitable data.

4. (a) discuss in about PSW. Also briefly what are PUSH and POP operation.
(b) discuss in detail with timing diagram the operation of call of CALL and RET instruction.

5. (a) Write a program to generate a delay of 1second using loop within loop techniques. presume suitable frequency of system.
(b) Write a program to perform multiplication of 2 8bit numbers stored in consecutive memory location. Also store the outcome of the number.

part B

6. (a) discuss the formats of data transfer.
(b) Draw the timing diagram of RSTs.

7. (a) Draw and discuss interrupt vector diagram.
(b) describe EI, DI, RIM, SIM instruction.

8. (a) Interface eight LED with 8085 using Latch 74 LS 373. presume suitable address. Also write instruction to turn lash the LED.
(b) discuss handshaking used by 8255 and generate triangular wave. presume suitable data.

9. Interface stepper motor with 8085 and a program to rotate the motor clockwise.

10.(a) Interface 4*5 keyboard with 8085 using 8255. Also write a program for detecting key closure and place the key code in accumulator.
(b) discuss the concept of multiplexed display interfacing using suitable example.

Earning:   Approval pending.