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Altera_Forum
Honored Contributor
8 years agoHi,
There is no ppm spec for DDR4 refclk. Both FPGA and HPS DDR4 refclk will be connected to IOPLL input clock pin. For IOPLL input clock spec, we only have jitter spec as shown in attached A10 datasheet. Best Regards, Anand Raj Shankar (This message was posted on behalf of Intel Corporation)