ARM Architecture - Bus Architecture
A 64-bit bus runs at 100 MHz. What is the theoretical maximum data transfer rate in megabytes per second (MBps)?
A 64-bit bus runs at 100 MHz. What is the theoretical maximum data transfer rate in megabytes per second (MBps)?
medium📝 Analysis Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Calculate bits per second
64 bits x 100,000,000 Hz = 6,400,000,000 bits/sec.Step 2: Convert bits to bytes and then to MBps
Divide by 8 to get bytes: 6,400,000,000 ÷ 8 = 800,000,000 bytes/sec. Then divide by 1,000,000 for MBps: 800,000,000 ÷ 1,000,000 = 800 MBps.Step 3: Check options carefully
800 MBps matches 800 MBps, but question asks for theoretical max data transfer rate in MBps, which is 800 MBps.Final Answer:
800 MBps -> Option AQuick Check:
Bits/sec ÷ 8 = Bytes/sec [OK]
Quick Trick: Divide bits/sec by 8 for bytes/sec [OK]
Common Mistakes:
- Confusing bits with bytes
- Forgetting to divide by 8
- Mixing MBps with Mbps
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