Can 2.5V Crystal oscillator be used for reference clk of DDR3L（1.35V）in C10GX？

[TGao]

The bank of Crystal oscillator input is 1.35V. it's the ddr3l bank ,and I'm not sure whether 2.5V/1.8V Crystal osi can used for reference clock of ddr3l?

Ted

[BoonT_Intel]

Hi Sir,

I believe the DDR3L reference clock is set to SSTL135 IO standard? If yes, you may check is the 2.5V OSC able to meet the VIH/VIL requirement of the SSTL135 IO standard.

You may check the VIH/VIL requirement from C10 GX datasheet. Since it is clock, please refer to AC column.

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyclone-10/c10gx-51002.pdf#page=17