[En-Nut-Discussion] Code protection

[Harald Kipp]

At 05:54 13.05.2006 +0100, you wrote:
>i have no experience  on Code protection, just got some question,
>if i enable code protection to prevent people copying the firmware,
>will i able to write the new firmware to the MCU again ?
>and did anyone can give an introduction some basic code protection working 
>method you guys using ??

Check the ATmega datasheets regarding fuses. You need to erase
the chip to disable the protection. After erasing you can
re-program it with new firmware.

These
http://www.atmel.com/dyn/resources/prod_documents/doc2541.pdf
http://www.atmel.com/dyn/resources/prod_documents/doc2589.pdf
might be of interest too.

Harald