ARM Architecture - Bus Architecture
Why is it important for a DMA controller to support bus mastering in ARM architecture?
Why is it important for a DMA controller to support bus mastering in ARM architecture?
hard📝 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Define bus mastering
Bus mastering allows a device like DMA controller to take control of the bus independently.Step 2: Explain importance in ARM
This lets DMA transfer data directly without CPU intervention, improving efficiency.Step 3: Exclude unrelated options
Bus mastering does not affect CPU speed, memory size, or reset CPU.Final Answer:
To independently control the bus and transfer data without CPU -> Option BQuick Check:
Bus mastering = DMA controls bus independently [OK]
Quick Trick: Bus mastering lets DMA control bus without CPU help [OK]
Common Mistakes:
- Confusing bus mastering with CPU speed or memory size
- Thinking bus mastering resets CPU
Master "Bus Architecture" in ARM Architecture
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