Unexpected power drops or timing mismatches during a standard write cycle can corrupt the option bytes, leaving the chip in an accidental locked state. 2. Standard Software vs. Exclusive Unlock Tools
If the tool allows, try to the chip first. If you can read but not write, it is a configuration issue rather than a connection issue. 3. Adjust Voltage Settings writing flash programmer fail unlock tool exclusive
Used by: Uniflash, FreeCalypso Tools