Password protected

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@Talon2

does this chip come password protected??

Yep, but just the config bytes by default, not the actual user memory:

New NExT not allowing writes

See in page E3 the AUTH0 byte is set to 04? That means the entire user memory from page 04 down are under the protection of the password feature. Something somewhere changed the AUTH0 byte in page E3. It just means you will have to authenticate first in order to write changes to the user memory. Probably the best way around it would be to reset the password to factory FF FF FF FF. Depending on the batch the default password will be DNGR or NExT. From the product page; Because of this, we set a d…

@Talon2

trying to copy iso1444-3a

What exactly are you trying to do?