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Altera_Forum's avatar
Altera_Forum
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8 years ago

Signal Tap II reading a "1" from SO of FLASH CHIP always, without changes. why?

I'm creating a very simple Flash controller as a school project. The flash chip is MX25L3206E and the FPGA is 5CEFA4F23C8. I created the code attached and routed the proper pins from the chip. After ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

I finally solved the problem, Datasheet does not mention it, it is necessary to erase the sector everything it is intended to write anything to it, so if you want to write something, prior to the command write you also have to properly send the command SE sector erase. So I have to work with the onchip ram to backup and rewrite the sector everytime, I don't understand exactly the reason for this, maybe someone else know why, maybe I'm wrong.