Microprocessors and Peripherals - Dec 2013

Electronics Engineering (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 the memory segmentation in Intel 8086 processor with its advantages and disadvantages(10 marks) 1 (b) Explain interrupts of Intel 8086 microprocessor.(10 marks) 2 (a) Design an 8086 based system with following specifications:-
(i) 8086 working at 8MHz
(ii) 32 kbytes EPROM using 16kb devices
(iii) 64 kbytes RAM using 32kB devices
Draw the complete schematic of the design indicating address map.(10 marks) 2 (b) Explain the following Intel 8086 assembly language instruction giving example
(1) TEST
(2) NOP
(3) STOS
(4) DAA
(5) SAR(10 marks) 3 (a) Explain the operating modes of 8255 PPI including handshaking operation.(10 marks) 3 (b) Explain the operating modes of 8254 PIT.(10 marks) 4 (a) Explain the modes of operation of DMA Controller.(10 marks) 4 (b) What do you understand by bus arbitration? Explain different bus arbitration techniques with diagram.(10 marks) 5 (a) Explain the 8288 bus controller block diagram. Explain its use.(10 marks) 5 (b) Explain the operation of three 8259 PIC in cascaded mode.(10 marks) 6 (a) Explain with neat diagram memory read and write machine cycle in maximum mode.(10 marks) 6 (b) Explain addressing modes of 8085 with example.(10 marks)

Write shorts notes any four of the following:-

7 (a) RS-232 Serial Interface Standard.(5 marks) 7 (b) 8284 Clock Generator.(5 marks) 7 (c) Fixed port and Variable Port addressing.(5 marks) 7 (d) Generation of Reset Signal in 8086 based system.(5 marks) 7 (e) String Instructions.(5 marks)