13. What happens when the HOLD input to the 8086/8088 is placed at its logic 1 level?

the microprocessor stops executing software and place its address, data and control bus into high impedance state

15. Explain the operation of the LOCK pin.

it locks peripherals off the system

16. What conditions do the QS1 and QS0 pins indicate about the 8086/8088?

it shows the status of the internal instruction queue

17. What three housekeeping chores are provided by the 8284A clock generator?

1- clock signal is provided 2- RESET input is synchronized 3- READY input is synchronized

26. Why are buffers often required in an 8086/8088-based system?

because the 8086/8088 microprocessor capable of driving only 10 unit loads and large systems often require many more

36. What does the ASYNC input to the 8284A accomplish?

select one or two stages of synchronization for ready

The system must be DEMULTIPLEXED before interfacing with memory or I/O why?

Memory and I/O interface require a stable address signal for data transfer and continuously changing address signal duo to multiplexing would lead to incorrect data access

it represents the time delay between the start of T1 and the appearance of the address on the memory address bus

it denotes the data setup time which occurs before T3, and it signifies the time required for the data to stabilize and become valid for sampling by the microprocessor

The Read Only Memory permanently stores programs and data to the system

Why ROM often called nonvolatile memory?

because its contents do not change even if power is disconnected

erasable programmable read-only memory, a type of ROM, is more commonly used when software must be changed often

programmable read only memory, is programmed by burning silicon oxide fuses and once it is programmed it cannot be erased

EPROM (erasable programmable read-only memory), requires wait states to operate properly

because of its long access time

difference between a ROM and a RAM

RAM is written under normal operation, but a ROM is programmed outside the computer

why After 2 or 4ms, the contents of the DRAM must be completely rewritten (refreshed)?

because the capacitors lose their charges

Define DDR (double-data rate)

DDR memory transfers data at each edge of the clock, making it operate at twice the speed of SDRAM

why it is necessary to decode the address sent from the microprocessor?

Without an address decoder, only one memory device can be connected to a microprocessor, which would make it useless

Micro - الفصل الثاني

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Micro - الفصل الثاني

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FILL IN THE BLANK QUESTION

1 min • 1 pt

2- Is the 8086/8088 TTL-compatible?

FILL IN THE BLANK QUESTION

1 min • 1 pt

4- What information appears on the address/data bus of the 8088 while ALE is active?

FILL IN THE BLANK QUESTION

1 min • 1 pt

5- What are the purposes of status bits S3 and S4?

FILL IN THE BLANK QUESTION

1 min • 1 pt

6. What condition does a logic 0 on the 8086/8088 RD pin indicate?

FILL IN THE BLANK QUESTION

1 min • 1 pt

7. Explain the operation of the TEST pin and the WAIT instruction.

FILL IN THE BLANK QUESTION

1 min • 1 pt

8. Describe the signal that is applied to the CLK input pin of the 8086/8088 microprocessors.

FILL IN THE BLANK QUESTION

1 min • 1 pt

9. What mode of operation is selected when MN/MX pin is grounded?

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Micro - الفصل الثاني

60 questions

2- Is the 8086/8088 TTL-compatible?

4- What information appears on the address/data bus of the 8088 while ALE is active?

5- What are the purposes of status bits S3 and S4?

6. What condition does a logic 0 on the 8086/8088 RD pin indicate?

7. Explain the operation of the TEST pin and the WAIT instruction.

8. Describe the signal that is applied to the CLK input pin of the 8086/8088 microprocessors.

9. What mode of operation is selected when MN/MX pin is grounded?

10. What does the WR strobe signal from the 8086/8088 indicate about the operation of the
8086/8088?

11. When does ALE float to its high-impedance state?

12. When DT/R is a logic 1, what condition does it indicate about the operation of the
8086/8088?

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Micro - الفصل الثاني

60 questions

2- Is the 8086/8088 TTL-compatible?

4- What information appears on the address/data bus of the 8088 while ALE is active?

5- What are the purposes of status bits S3 and S4?

6. What condition does a logic 0 on the 8086/8088 RD pin indicate?

7. Explain the operation of the TEST pin and the WAIT instruction.

8. Describe the signal that is applied to the CLK input pin of the 8086/8088 microprocessors.

9. What mode of operation is selected when MN/MX pin is grounded?

10. What does the WR strobe signal from the 8086/8088 indicate about the operation of the8086/8088?

11. When does ALE float to its high-impedance state?

12. When DT/R is a logic 1, what condition does it indicate about the operation of the8086/8088?

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10. What does the WR strobe signal from the 8086/8088 indicate about the operation of the
8086/8088?

12. When DT/R is a logic 1, what condition does it indicate about the operation of the
8086/8088?