Clock Frequency Definition

Clock frequency is defined as the inverse of time difference between two consecutive rising or falling clock edges when they cross a specific reference level. Clock frequency can be calculated by taking an inverse of the clock period.

Clock Frequency DspSee Symbol

Active Edge	Clock Frequency
Falling	Falling edge clock frequency is the inverse of time difference between two consecutive falling clock edges when they cross a specific reference level.
Rising	Rising edge clock frequency is the inverse of time difference between two consecutive rising clock edges when they cross a specific reference level.
Both	It is the inverse of time difference between two consecutive clock edges (a rising & a falling) when they cross a specific reference level.

Significance of statistics:
Mean	The mean clock frequency should be as close to the required clock frequency as possible. A lower frequency will result in a slower system speed. A higher frequency will result in smaller timing margins.
Min	The min clock frequency should be as close to the required clock frequency as possible. A lower clock frequency will result in lesser system speed.
Max	The max clock frequency should also be as close to the required clock frequency as possible. A higher clock frequency will result in lesser timing margins.
Peak cy-cy	Very important. The peak cycle-to-cycle clock frequency should be as small as possible. A higher value will result in higher cycle-to-cycle jitter and a smaller timing margin.
Peak-to-peak	The peak-to-peak value should be as small as possible. Higher peak-to-peak values can cause problems with PLLs.

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