Intel altera Cyclone V SoC - Page 42

Target Frequency
The Target frequency control allows you to specify the frequency of the clock. Legal
values are between 10 and 810 MHz with eight digits of precision to the right of the
decimal point. For example, 421.31259873 is possible within 100 parts per million
(ppm). The Target frequency control works in conjunction with the Set New
Frequency control.
Default
This control sets the frequency for the oscillator associated with the active tab back to
its default value. This can also be accomplished by power cycling the board.
Set New Frequency
The Set New Frequency control sets the programmable oscillator frequency for the
selected clock to the value in the Target frequency control for the Si570 and Si571.
Frequency changes might take several milliseconds to take effect. You might see
glitches on the clock during this time. Altera recommends that you reset the FPGA
logic after changing the frequencies.
Figure 17. The Clock Control—Si5338
Related Information
• Cyclone V SoC Development Board Reference Manual
• Skyworks Solutions
5. Board Test System
830285 | 2024.10.07
Cyclone
®
V SoC Development Kit User Guide
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