Protect the code

[NF9Ω]

http://www.mcucrack.com/ and http://www.waferstar.com/en/index.shtml doing this job for all microcontrollers.

I know some devices extract code from AT51/52 micro.
Just insert microcontroller, Press start button, and all code save in 24c64 in 4 min.
I always protect microcontroller to apply 24v 10ma power source only once to eny pin of PORT0 ( that are not used )with respect ground , No one extract code after this.