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Altera_Forum
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15 years ago

Anyone can run DDR2 stably with Stratix IV?

Anyone can run DDR2 stably with Stratix IV and Quartus 9.1 Sp2 or above? I've tried about 8 board(the same PCB layout) which has 1 Stratix IV 530 ES device and 7 Stratix IV 530 FPGA. The board wit...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Hi,

What's the PHY speed you were running at? and the FPGA device / speed grade?

Mine is -4 speed. I still have the problem after ajusting "Addr/Cmd clock setting" to 240 (looks the best for the board,please ignore the picture I attached. It was the problem of "Addr/Cmd clock setting") and "Addr/cmd to CK skew" from 0.3ns to -0.3ns.