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TL866A and trouble reading ATMEGA328P
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ebastler:

--- Quote from: SA on January 16, 2024, 12:14:17 pm ---If I reset the fuse of Atmega328p by using high voltage programmer, will I be able to read from read protected chip?

--- End quote ---

That would not be a very effective protection then, right? No, it does not work that way. "The Lock bits can only be cleared by executing Chip Erase", see section 28.7 of the chip's manual.
coromonadalix:
unless as stated you use some glitch procedues   or even uncap the ic,   reading it is a NO  by normal means

resetting the fuse will kill the content,  as stated an high voltage programmer will do the same as erasing and resetting the bits, once done  the content is dead


you have fuses for spi access
fuses for read only  etc ....   
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