Chapter 10
228 MIPS R4000 Microprocessor User's Manual
10.1 Signal Terminology
The following terminology is used in this chapter (and book) when
describing signals:
• Rising edge indicates a low-to-high transition.
• Falling edge indicates a high-to-low transition.
• Clock-to-Q delay is the amount of time it takes for a signal to
move from the input of a device (clock) to the output of the
device (Q).
Figures 10-1 and 10-2 illustrate these terms.
Figure 10-1 Signal Transitions
Figure 10-2 Clock-to-Q Delay
1 2 3 4
high-to-low
transition
low-to-high
transition
single clock cycle
clock input
Q
data in
data out
Clock-to-Q
delay
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