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Valued Contributor III
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Write Protection issue on EPCS

Hi, I'm using CyclonIII with standard AS configuration scheme with EPCS64. 

 

My project includes writing/reading parameters to/from EPCS Flash memory by NIOS. 

 

How can I protect Configuration Image on EPCS Flash from accidental overwriting? 

 

Thanks.
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Valued Contributor III
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EPCS flash devices have a block protection feature which helps to prevent unintentional data overwriting. You can select the protected blocks through a 3-bit configuration in status register.  

Refer to the EPCS datasheet, page 16 and following.
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Valued Contributor III
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Thank you for your response.  

Yes, I know about this register but I don't realy want to alter EPCS Controller design in order to access this register. 

Is there another way to config this reg?
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Valued Contributor III
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I think, the protection can be changed in the flash programmer tool, it has been discussed in the forum before.

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Valued Contributor III
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Could you possibly point me at this topic in the forum? I've not found it.

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