MU Electronics Engineering (Semester 5)
Microcontroller and Applications
December 2013
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1 (a) Design 8085 based system with following specification
Draw detail interface diagram.
(i) CPU operating at 3 Mhz
(ii) 16KB EPROM using 4KB device
(iii) 32KB RAM using 8KB device
Give its memory mapping & I/O mapping and use absolute decoding approach.
15 M
1 (b) Explain addressing modes with example of 8085 microprocessor
5 M

2 (a) Explain the Interrupt structure of 8085 microprocessor
10 M
2 (b) Explain with block diagram interfacing of 8255 PPI and 8085 microprocessor with control word for data transfer in handshake mode.
10 M

3 (a) Draw timing diagram for
(i) Opcode fetch
(ii)Memory read
(iii) I/O read
6 M
3 (b) Explain SIM & RIM instructions of 8085 microprocessor
4 M
3 (c) Explain interrupt structure of 8051 microcontroller
10 M

4 (a) Explain following instructions used in ARM with one example each
(i) LDM/STM (ii) BIC (iii) ADD/SUB (iv) MVN (v) BEQ
10 M
4 (b) Explain the CPSR register of ARM7 processor.
5 M
4 (c) Explain the flag register of 8085 microprocessor
5 M

5 (a) Write a program to generate square wave of 1KHz frequency using 8155 timer. (Timer operating at 3 MHz)
10 M
5 (b) Write a program to multiply two numbers for 8085 microprocessor
10 M

6 (a) Draw & Explain block diagram of 8259 peripheral IC
10 M
6 (b) Explain addressing modes with example of 8051 microcontroller
10 M

Write a short note on
7 (a) TCON & TMOD registers of 8051 Microcontroller
7 M
7 (b) Addressing modes of ARM processor
7 M
7 (c) Stepper motor interfacing with 8051 microcontroller
7 M



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