[En-Nut-Discussion] ATmega2561 Fuses

[Dusan Ferbas]

Hi guys,

those, who tested 2561 chips - Did you notice something similar to 
following when working with this chip ?

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I was able to flash basemon code once. It worked. I was able to flash 
another basemon (different version) 2nd time.
An attempt to flash the first version (3rd time) failed.

Chip now returns all 1s (0xFF) to ISP programmer.
We have no possibility to further program the chip, neither to 
change, even to read fuses.

P.S. When we replace 2561 with ATmega128, change chip type in AVR 
Studio, ISP works.


Dusan