anyone explain : High voltage programmer can reset lock bits without loosing code or program from atmega328? Gammon Forum : Electronics : Microprocessors : High-voltage programming for... Gammon Forum : Electronics : Microprocessors : High-voltage programming for AVR chips

No, the current code in the flash will be deleted Otherwise there would be no point in lock bits From the Atmega328 datasheet (chapter 26.5): Lock bits can be set in software in Serial or Parallel Programming mode, but they can be cleared by a Chip Erase command only.

[image] Understanding Lock Bits, Fuse Bits and Code Security Programming Questions The only way to clear the lock bits is a full chip erase. However, the lock bits will not normally prevent the code from being read by the bootloader.

To do this you need to edit bootloader first. But you can't if the lock bits forbids it.

[Unlock Atmega Attiny Fuse Doctor Fuse Repair Programmer] please see in this video programmer jumper prevent the code.

High voltage programmer can reset lock bits without loosing code or program from atmega328?

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pradippatel80494 July 6, 2023, 6:40am 3

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High voltage programmer can reset lock bits without loosing code or program from atmega328?

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