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Altera_Forum's avatar
Altera_Forum
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15 years ago

cyloneIII board questions

hi. maybe the reason of DDR SDRAM is different from the SDRAM,I often meet the question,that is: Downloading 02000000 ( 0%) Downloading 02007E18 (78%) Downloaded 32KB in 0.5s (64.0KB/s) ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

A ddr ram doesn't degrade when reading data from and writing to, unlike a flash eprom. The only possibility is that the board was defective from the beginning (bad component or bad soldering).

Do you use a precompiled .sof file for configuring the fpga for the demo project or did you recompile the demo project. In the first case the above hardware problem is the only plausible choice. In the second case you probably have some bad compilation setting in Quartus.