How do you program EB40A flash memory?

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I'm looking into programming the EB40A flash memory (AT49BV1614A). Does
anyone have an example of how to program this? The first megabyte contains
the boot code. The document says to write 0xaa to 0x555 etc. to enter
"product identification mode". But I'm afraid that I might overwrite part
of the boot code that is in low flash memory.

Can someone explain how this works?

thanks,
David


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