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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 All,

thanks! The problem has been resolved. The problem is the DLL and the board power supply.

DLL dqs delay output varies too much according the ripple from power supplier(about 100-150mv).