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PIMPRI CHINCHWAD COLLEGE OF ENGINEERINGSector 26, Pradhikaran, Nigdi, Pune 44

SUBJECT: Microprocessor and Interfacing TechniquesCLASS: S.E. COMP A Section

SUBJECT INCHARGE: Mrs. Preethi S.J.

QUESTION BANK OF UNIT 3

1. What is Interrupt? What is interrupt service routine? What is interrupt vector table? Explain

8086 interrupt types [16]

2. Draw and explain the block diagram of 8259 PIC [8]

3. Explain priority modes in 8259 [6]

4. Draw 8259 initialization flow chart and explain command words/control words of 8259 in

detail [8]

5. Explain the master-slave configuration of 8259 with the help of suitable diagram. Describe

the use of CAS0,CAS1 and CAS2 lines in a system with cascaded 8259s [8]

6. Draw and explain the functional block diagram of IC 8253/54 [6]

7. List the differences between 8253 and 8254 [4]

8. What are different modes of operation of 8253 programmable timer? Explain with the help of

waveforms [10]

9. Design a programmable timer using 8253. Interface 8253 at an address 0040H for counter0.

Draw the interfacing diagram. Operating frequency for 8086 and 8253 is 6Mhz and 1.5Mhz

respectively. Write the ALP to generate square wave of 1ms. Show the control word formatand delay calculations clearly.

10. Design a mono-stable multivibrator to obtain a pulse width of 5msec with 8253 using an

external clock of 100Khz.

QUESTION BANK OF UNIT 4

1. With the help of block diagram explain various modes of operation of 8255 [10]

2. Draw and explain the internal block diagram of 8279 [8]

3. Explain 8279 commands [10]

4. Explain the following: [24]

Encoded scan

Decoded scan

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2-key lock out

n-key roll over

Display ram

FIFO/Sensor RAM

Keyboard debounce

Scanned keyboard mode

Scanned sensor matrix mode

Strobed input

Left entry display mode

Right entry display mode

5. Explain FIFO Status register [4]

6. Differentiate between synchronous and asynchronous serial communication [8]

7. Draw and explain the block diagram of 8250 UART [8]

8. Draw and explain the block diagram of 8251 USART and explain in brief [8]

9. Draw and explain command and mode word formats of 8251A [8]

10. Explain various registers available in 8250 [8]

11. Explain the functional block diagram of 8237 DMA controller [8]

12. Explain the different operating modes of 8237 DMAC. Also name the different

programmable registers available in 8237 along with their functions. [8]

13. Draw and explain functional block diagram of DAC 0830. Explain the interfacing of DAC0830 with 8086. [8]

14. Discuss the following modes of DMA Transfer [6]

Single transfer mode

Block transfer mode

Demand transfer mode

QUESTION BANK OF UNIT 5

1. Explain R/2R ladder techniques of D/A conversion. What are the different sources of errors

in DAC? [8]

2. What is ADC? Which are different methods for ADC? Explain the successive approximation

ADC with block diagram [8]

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3. Explain Data acquisition system with examples [6]

4. Interface a stepper motor with 8086. What is full stepping and half stepping modes? Write

initialization routine for the same [10]

5. Discuss the different types of force and pressure transducers [8]

6. Define the following terms of D/A converters [8]

Resolution

Accuracy

Monotonicity

Conversion time

7. Write short notes on

LVDT

Flow sensors

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