Understanding Lock Bits, Fuse Bits and Code Security

[westfw]

@mruser

Does this mean if you programmed the lock bits for complete security, a high voltage programmer could change these fuses and still read the flash memory? Does using a HVP clear the memory??

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.