Microcontroller and Applications - May 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.

Attempt the following

1 (a) Explain following signals of 8085
1) ALE,
2) READY,
3) INTR
(5 marks) 1 (b) Explain addressing modes of 8085? (5 marks) 1 (c) Explain different assembly directives of 8051? (5 marks) 1 (d) Explain control word of 8255? (5 marks) 2 (a) Explain interrupt structure of 8051? (10 marks) 2 (a) Explain different modes of operation of 8254?(10 marks) 3 (a) Explain register architecture of ARM processor?(10 marks) 3 (b) Explain architecture of 8051 with neat label diagram?(10 marks) 4 (a) Explain interfacing of 8259 with 8085 showing decoding logic?(10 marks) 4 (b) Explain architecture of 8051?(10 marks) 5 (a) write an assembly language program to read 4 x 4 interface through 8255?(10 marks) 5 (b) Explain interfacing of external memory with 8051?(10 marks) 6 (a) Compare variant of 8051 such as 89C51,89C52,89C2051 and 89C2052?(10 marks) 6 (b) Explain different I/O mapping techniques. Give suitable examples?(10 marks)

Write Short notes:

7 (a) Serial communication supported by 8085.(5 marks) 7 (b) Program status word of 8051. (5 marks) 7 (c) Interrupt acknowledge bus cycle of 8085? (5 marks)