The MFC ‘handshaking” signal is sent from memory to the CPU when the memory sub-
ID: 3760747 • Letter: T
Question
The MFC ‘handshaking” signal is sent from memory to the CPU when the memory sub-system has finished the requested operation. Why is this signal necessary? Explain with answer.
I. The memory has a variable response time.
II. The RAM may be going through a refresh cycle, and so it is or has been temporarily unavailable
III. If reading, it can serve as a signal that the MDR can be safely clocked and the CPU can receive the data or instruction.
A I, II & III
B I & II
C I only
D II only
E None of the above
Explanation / Answer
D II only