I am using MK64FN and having trouble while unsecuring this IC on my own board.The image of detailed issue as attachment.I searched some solutions in forum but it doesn't work.Looking forward to your help.
Does it work if you do the same thing with a FRDM-K64F board? If so, it could be related to your board layout (unlikely, but just a point to consider).
The more important thing is: have you disabled mass erase on your device (see How (not) to Secure my Microcontroller | MCU on Eclipse and Preventing Reverse Engineering: Enabling Flash Security | MCU on Eclipse ). If yes, then you won't be able to recover your device.
I hope this helps,
After soldering a brand new IC on my own board, i tried to unsecure the IC but it still failed.
Here is the pulse measured on Reset pin. It is unusual?
Retrieving data ...