Microprocessor and Peripherals - Dec 2012

Electronics & Telecomm. (Semester 4)

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) Explain need of demultiplexing of ADO-AD7 of 8085 microprocessor.(5 marks) 1 (b) Explain difference between AJMP, 5JMP, LJMP instructions of 8051 microcontroller.(5 marks) 1 (c) Write program to 8255 PPI to read data from C_L and transfer it to Port C_U.(5 marks) 1 (d) Describe features of ARM controller.(5 marks) 2 (a) Draw and explain Timing diagram of LDA DOSOH.(10 marks) 2 (b) What is difference between memory mapped I/O and I/O mapped I/O? Interface 8085-8255 in I/O mapped I/O.(10 marks) 3 (a) Draw and explain architecture of 8051 microcontroller.(10 marks) 3 (b) Write a 8051 assembly language program to transfer message ?WELCOME? serially at 9600 boud 8 bit data, 1 stop bit.(10 marks) 4 (a) Explain addressing modes of ARM controller with examples.(10 marks) 4 (b) Write a program to generate square wave with pulse width of 100 as using 8155. Assume clock frequency is 3MHz.(10 marks) 5 (a) Interface 16KB EPROM using 8KB chip and 8KB RAM using 4KB chip. Use absolute decoding.(10 marks) 5 (b) Explain interrupt structure of 8051 microcontroller and related SFRs.(10 marks) 6 (a) Explain instruction DAA of 8085 with an example what are the contents of Reg A after following Program executed: [ ?egin {align} 6000:& MVI A, 11 H \ & MVI B, 22 H \ & LXI H, 600 C \ & CALL ADDs \ &INR A \ &HLT \ ADDs: & XTHL \ & ADDB \ &RET end{align} ](10 marks) 6 (b) Explain internal structure of I/O ports of 8051 microcontroller.(10 marks) 7 (a) Explain SIM and RIM instruction of 8085 microprocessor.(10 marks) 7 (b) Write a program for 8051 microcontroller to count the number of 1's and number of 0's in 8-bit number.(10 marks)