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about sdram a/d bus shared

Altera_Forum
Honored Contributor II
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hi all: 

 

In tne altera reference design, the SDRAM not share address/data bus with flash, 

 

sram, lan chip. But in my design I shared sdaram address/data bus with flash to 

 

reduce IO pins. Now I meet a problem. I can run the single program fine without  

 

OS.But when I run uClinux 2.6 os on own board the system will boot fail.The fail 

 

information is CRC erro. However I run the same uClinux 2.6 os on altera cyclone 

 

1c20 dev board, it is work fine.The difference is my design shared the SDRAM a/d 

 

bus with flash.I think maybe the reason is disturb. 

 

Who can give me some advice to solve the question? 

 

Thank a lot!
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