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In a distributed bus arbitration system, devices fail to detect each other's requests, causing bus conflicts. What is the likely error?

medium📝 Analysis Q7 of 15
ARM Architecture - Bus Architecture
In a distributed bus arbitration system, devices fail to detect each other's requests, causing bus conflicts. What is the likely error?
AMissing or faulty request signal lines between devices
BArbiter is granting bus access too quickly
CBus clock frequency is too low
DDevices have different data widths
Step-by-Step Solution
Solution:

  1. Step 1: Understand distributed arbitration requirements

    Devices must communicate requests to each other via signals.

  2. Step 2: Identify cause of failure to detect requests

    If signals are missing or faulty, devices cannot coordinate bus access.

  3. Final Answer:

    Missing or faulty request signal lines -> Option A

  4. Quick Check:

    Distributed arbitration needs working request signals [OK]
Quick Trick: Devices must see each other's requests via signals [OK]
Common Mistakes:
  • Blaming clock speed or data width for arbitration conflicts
  • Assuming arbiter speed affects distributed arbitration

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