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Altera_Forum
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10 years ago

What is the max ddr2 clock frequency support by cycloneiv?

For EP4CE30F23C6N device, what is its max clock to drive external ddr2? I just find one statement on handbook "support to DDR2 SDRAM interface up to 200Mhz" Where I can find the detail specific...
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Altera_Forum
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10 years ago

The practical answer - yes. If you wish to use Altera's DDR2 IP.

Cyclone IV will support much higher external clock output frequencies. Refer to the PLL Specifications in the cyclone iv device datasheet (https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/hb/cyclone-iv/cyiv-53001.pdf), and table 1-25. A -6 part will support up to 472.5MHz, depending on I/O standard. However, putting that to use as part of a DDR2 interface is another matter and not something to be undertaken lightly.

Cheers,

Alex