AVR-Chat

You need to make sure that the write will complete before power goes
out of spec.
You also need to make sure that the address you're writing to is
correct, and that the data is correct.

Generally, when not actively using the EE, I leave the EEAR pointing
at 0x00, so that a wild write for whatever reason, should overwrite
this address, which I dont use.

When I set up a program to specifically investigate this in the 8515,
I never caught a single instance of EE corruption, when the code
followed the rules above.

Maybe one other complication could be the low power crystal
oscillator, that has the magic ability to hose up anything..
Never use the low power crystal oscillator!