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Valued Contributor III

boot problem with ddr2 sdram

does anyone successfully port uclinux to nios board with ddr2 sdram? 

i have a board with cycloneii and ddr sdarm, and when i run uclinux in ddr2 ram, sometime niosii ide uart jtag print: verified failed .It seems something is wrong with ddr2 sdram .does anyone know where is the problem? in addition , the ddr2 sdram can run successfully in other system.
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