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Altera_Forum
Honored Contributor
Honored ContributorCyclone V E Development Board Kit
Hi all, I have Cyclone V E Development board kit. In the user guide, it said the frequency could go up to 810 MHZ by using Clock Control Application. But in the Cyclone V datasheet, it said "Glo...
Altera_ForumHonored Contributor
Honored ContributorLet me clarify this:
1. The Cyclone V E dev Kit has an external on-board programmable oscillator Si570 whose frequency range is 10Mhz to 810MHz. This means that you can use this Si570 oscillator to generate any frequency between this range. You could use this as an input to the FPGA also. 2. The Cyclone V Series FPGA thats on the board has 4 PLLs, whose max frequency is 560-660MHz. This means that these PLLs, depending on the exact device, can generate clocks with a maximum frequency of 550-650MHz. The core logic in the FPGA may be optimized for these operating frequency ranges to ensure you do not have any clock jitter/routing issues as well as timing issues.
