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Altera_Forum
Honored Contributor
Honored ContributorHow to connect DDR2 clock?
In my design, a DDR2 SDRAM module is connected to the EP3C120, but I don't know how to connect the clk pins. There are two pairs of differential clk signal in my DDR2 SDRAM module: clk0, clkn0, clk1 and clkn1. Can they be connected to the regular user I/O? Thanks!
3 Replies
Altera_ForumYou can just use regular IO pins. Just make sure you run the fitter in Quartus and address any ALTMEMPHY complaints before laying out the PCB.
- Altera_Forum
But in the EP3C120, each pll has only one pair of clock output signals. But my DDR2 SDRAM module requires two pairs. Should I connect them to two different plls respectively?
- Altera_Forum
use the pll_out_p and pll_out_n
