Practice Components Of A Typical Dma Controller (29.4.2) - Overview of DMA and Interrupt Driven I/O

Practice: Components of a Typical DMA Controller

Lesson 29.4.2Overview of DMA and Interrupt Driven I/O

Practise this section

10 questions

Flashcard drill
5 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
Define Direct Memory Access (DMA).
Show hintHide hint
Think about how devices share information with memory.
Question 2.
What is the role of the Data Count Register in a DMA controller?
Show hintHide hint
Consider what you need to know before you start transferring data.
3Question 3.
What does DMA stand for?
- Direct Mode Access
- Direct Memory Access
- Dynamic Memory Access
Show hintHide hint
Focus on the function it describes.
4Question 4.
True or False: In burst transfer mode, the CPU can perform other tasks while the DMA controller is active.
- True
- False
Show hintHide hint
Think about the prioritization of bus access.
Question 5.
A DMA controller is designed to handle burst transfers of large data-sized 10 MB. If the system has a 32-bit data bus, how many total transfers will be required, and how does this impact the CPU’s operation?
Show hintHide hint
Consider the byte-to-transfer relationship and divide accordingly.
Question 6.
If a system using cycle stealing mode needs to transfer data and the CPU experiences a 10% delay per byte transferred, calculate the total delay for transferring 2000 bytes. What strategies could mitigate this delay?
Show hintHide hint
Think about how delays accumulate during each cycle's transfer.

6 more questions in this section. Enroll free to practise them all.