3.3. ARM Cortex-M0 Bus Interface

Try these first

1. 1.

   What does AHB stand for?

   Hint

   Think about what type of bus it is.

2. 2.

   What is an example of Memory-Mapped I/O?

   Hint

   Consider how you would access a peripheral.

3. 3.

   What does the AHB-Lite bus do?

   • A low-speed data bus
   • An advanced high-performance data bus
   • A basic address bus

   Hint

   Think about the performance aspect of the bus.

4. 4.

   True or False: DMA requires CPU intervention for memory access.

   • True
   • False

   Hint

   Consider what DMA is supposed to do.

5. 5.

   Given a scenario where data is being transferred from a sensor to memory using traditional I/O versus DMA, analyze the potential performance differences.

   Hint

   Think about what happens to the CPU's workload during the transfers.

6. 6.

   Design a simple embedded system using the ARM Cortex-M0 where DMA could be crucial. Explain your design decisions.

   Hint

   Consider what kinds of tasks the CPU must manage versus what can be offloaded.