Microcontroller and Applications - Dec 2013

Electronics Engineering (Semester 5)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 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 marks) 1 (b) Explain addressing modes with example of 8085 microprocessor(5 marks) 2 (a) Explain the Interrupt structure of 8085 microprocessor(10 marks) 2 (b) Explain with block diagram interfacing of 8255 PPI and 8085 microprocessor with control word for data transfer in handshake mode.(10 marks) 3 (a) Draw timing diagram for
(i) Opcode fetch
(ii)Memory read
(iii) I/O read (6 marks) 3 (b) Explain SIM & RIM instructions of 8085 microprocessor(4 marks) 3 (c) Explain interrupt structure of 8051 microcontroller(10 marks) 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 marks) 4 (b) Explain the CPSR register of ARM7 processor.(5 marks) 4 (c) Explain the flag register of 8085 microprocessor(5 marks) 5 (a) Write a program to generate square wave of 1KHz frequency using 8155 timer. (Timer operating at 3 MHz)(10 marks) 5 (b) Write a program to multiply two numbers for 8085 microprocessor(10 marks) 6 (a) Draw & Explain block diagram of 8259 peripheral IC (10 marks) 6 (b) Explain addressing modes with example of 8051 microcontroller(10 marks)

Write a short note on

7 (a) TCON & TMOD registers of 8051 Microcontroller(7 marks) 7 (b) Addressing modes of ARM processor(7 marks) 7 (c) Stepper motor interfacing with 8051 microcontroller(7 marks)