ARM Architecture - Bus Architecture
If a bus fault occurs due to a peripheral access, what is the likely cause?
If a bus fault occurs due to a peripheral access, what is the likely cause?
medium📝 Analysis Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Analyze bus fault on peripheral access
Bus fault can occur if the peripheral is missing or powered off, causing invalid access.Step 2: Exclude unrelated causes
CPU clock speed, cache, or interrupts do not directly cause bus faults on peripheral access.Final Answer:
Peripheral is not powered or not present -> Option CQuick Check:
Peripheral missing = Bus fault [OK]
Quick Trick: Bus fault on peripheral means missing or unpowered device [OK]
Common Mistakes:
- Blaming CPU clock speed
- Confusing cache with bus fault cause
- Thinking interrupts cause bus fault
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