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Flash Configuration Error LED

Altera_Forum
Honored Contributor II
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Hello, 

 

I am using the Arria V starter board. After programming to flash memory at address 0x100000 the "D10 Error LED" lights up when "the FPGA configuration from flash memory fail".  

I am still able to program my system and download software to Nios cores, the program runs properly, and the Flash memory contents are correct. 

 

Something obviously does go wrong during start up because usually the LED display shows "Not connected" but now it is a bunch of black boxes.When I reset flash memory everything is fine. 

Is this big a deal? How do I know what part of flash I can safely overwrite? 

 

I am not using the whole flash device and have set the upper address bits to zero (only the range 0x0-0x400000). Is this region of flash not usable? 

 

Thanks 

Jonah
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