The Clocks Tool instantly re-calculates the state of the entire clock system after each change of settings from the clock source up to the clock outputs.
The current state of all clock outputs is listed in the Clock Outputs
view located on the right side of the clock sources. The displayed value can be:
- Frequency – Indicates that a clock signal is active and the output is fed with the shown frequency. The tool automatically chooses the appropriate frequency units. In case the number is too long or has more than three decimal places, it's shortened and only two decimal places are shown, followed by an ellipsis (‘…’), indicating that the number is longer.
- “Inactive” text – Indicates that no clock signal flows into the clock output or is disabled due to some setting.
Figure 1. Setting the core clock frequency
In case the tool has reached/attained the required frequency, it appears locked and is
displayed as follows:
Figure 2. Tool attains the required frequency
In case the tool is not able to reach/attain the required frequency or some other
problem occurs, it's displayed as follows:
Figure 3. Tool encounters problem
The frequency value in square brackets [ ] indicates the value that the tool is
actually using in the calculations instead of the value that has been requested.
Note: You can edit or set requirements only for the clock source and the output
frequencies. The other values can be adjusted only when no error is reported.