10.5.1. Steps for Accessing Memory Data

Try these first

1. 1.

   What does the Control Unit do in a CPU?

   Hint

   Think of the control unit as the traffic director for data.

2. 2.

   What is the purpose of the Memory Address Register (MAR)?

   Hint

   Remember, MAR points where to find data in memory.

3. 3.

   What should be enabled for a register to output data?

   • Control Signal
   • Data Line
   • Address Bus

   Hint

   Think about what initiates data flow.

4. 4.

   A contention situation occurs when:

   • True
   • False

   Hint

   Imagine traffic jam with more cars than paths!

5. 5.

   Describe what would happen if both R1 and R2 are set to output to the internal bus without proper control.

   Hint

   What analogy can you think of with traffic?

6. 6.

   If the timing of signals in a CPU is off, what kinds of errors can occur?

   Hint

   How does a synchronization clock help prevent this?