ARM Architecture - Bus Architecture
In a system combining bus arbitration with power management, what arbitration strategy best reduces power consumption while ensuring fair access?
In a system combining bus arbitration with power management, what arbitration strategy best reduces power consumption while ensuring fair access?
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Consider power management goals
Reducing power means minimizing unnecessary bus activity and idle device wake-ups.Step 2: Evaluate arbitration strategies
Dynamic priority lowers priority of inactive devices, saving power and allowing fair access.Step 3: Compare with other options
Fixed priority can starve devices; random or no arbitration wastes power and causes conflicts.Final Answer:
Dynamic priority arbitration that lowers priority of inactive devices -> Option BQuick Check:
Power-efficient arbitration = Dynamic priority [OK]
Quick Trick: Dynamic priority adapts to device activity for power saving [OK]
Common Mistakes:
- Choosing fixed priority which can waste power
- Ignoring power impact of arbitration method
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