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Posted Date: 19 Jul 2009 Posted By: guna Member Level: Gold
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2007 Basara University B.E Information Technology Microprocessor Question paper
Date: 27-11-2007 Total Marks: 100
Time: 10.00a.m. To 1.00p.m.
Instructions: 1) Q.1 from section-1 and Q.5 from section-2 are compulsory.
2) Solve any two questions from Q.2, Q.3, and Q.4
3) Solve any two questions from Q.6, Q.7, and Q.8
SECTION-1
Q.1 a)State whether true/false. Justify (any five)[Marks 10=2*5]
1) POP D is data transfer of instruction.
2) ALE signal is required because higher order bus is multiplexed with data in 8085.
3) 'Opcode FetCh ’machine cycle is of 4t states for all instructions.
4) RST 4.5 pin causes microprocessor 8085 to go in to ‘WAIT’ state.
5) If register H=OOH, L=OIH, then by using DCX h instruction will set zero flag.
6) RST5 is a direct addressing mode type instruction.
b)Accumulator A contains 11H. What flags will be affected by executing following program excerpt?[Marks 4]
MVI B, 2BH
CMP B
HLT
c) Explain the function of READY signal of 8085 with timing diagram.[Marks 6]
Q.2 a) Explain the memory mapped I/O mode used in 8085. [Marks 6]
b) Explain the execution of the following instruction in each machine cycle.[Marks 9]
8085 H CC 9700 H
Q.3 a) Assume that the accumulator contents data bytes 88 hand instruction MOV C, A 4FH is fetched. List the steps decoding and executing the instruction.[Marks 8]
b) Explain the control and status signals of 8085.[Marks 5]
Q.4 a) Explain single stepping with diagram.[Marks 8]
b) Explain with timing diagram instruction of IN 82 H.[Marks 7]
SECTION-2
Q.5 a) with the help of 8279 block diagram explains display section of 8279. [Marks 8]
b) Interface ADC 0809 to the microprocessor with 8255 .Select input channel 2 for conversion.[Marks 7]
Q.6 a) Explains in detail synchronous transmission and synchronous receptors.[Marks 8]
b) With the help of block diagram explain successive approximation. [Marks 7]
Q.7 a) Explain the sequence of operations for DMA transfer using HOLD and HALD signal.[Marks 7]
b) Explain the following command word formats for 8279.[Marks 8]
1) Clear mode
2) Keyboard/display mode
Q.8 a) Draw and explain the block diagram for 8251.[Marks 8]
b) Draw the interfacing for ADC 0809 WITH 8085.[Marks 7]
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