Question 1: Explain what SIM is. Describe the bit pattern of the accumulator for SIM instruction.
Question 2: List all the operating modes of 8155A programmable device.
Question 3: Write a brief note on any of the applications of the microprocessors.
Question 4: Describe the DMA controller 8257?
Question 5: Draw the block diagram of 8255 microprocessor and describe its working. What do you mean by Control Word?
Find out the control word for the given configuration of 8255:
Port A – Output
Mode of port A – Mode 1
Port B – Output
Mode of port B – Mode 0
Port C lower (pins PC0 – PC2) – Output
Question 6: What do you mean by 8254? Describe its different operating modes. Write down its areas of applications?
Question 7: Describe main components of 8259 with the help of appropriate diagram.
Question 8: Describe USART in detail.
Question 9: Describe the functional diagram of keyboard and the display controller.
Question 10: Describe the functional diagram of 8155 and illustrate its control word.