The price of AVR's crack is about $300.
I want to use this method:
1,Write code into the MCU;
2,Use high-voltage( example:+12V) connect to MISO(or MOSI,or SCK)pin,for destroy ISP interface;
3,Use high-voltage connect to one pin of PORTD,for destroy the parallel interface;
4,Update the code by UART in self-programming mode.
May I do it?