May i know what is the exactly clock frequency for cyclone iv EP4CE22

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