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Exactly which 'clock frequency' are you referring to? There are a number of data sheet parameters that refer to min/max clock frequencies.
For example, 'clock tree' performance range maximum is anywhere from 350MHz to 500MHz, depending on speed grade of the device.
You have to ask a lot more specific questions.
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Hi, I would like to clarify if you are looking for the PLL input clock frequency of Cyclone IV devices. You can refer to the Cyclone IV device datasheet, Table 1.25:
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyclone-iv/cyiv-53001.pdf
Thank you
Regards,
Chia Ling
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