AnsweredAssumed Answered

K26 locked

Question asked by Kari Makelainen on Jan 21, 2019
Latest reply on Jan 23, 2019 by Mark Butcher

Hi, I have in our production series some issues on MK26FN2M0 being locked.

Seems like the chip can not be unlocked permanetly.

We are using J-link commander V6.34c to unlock the chip and then J-Flash v6.34c to erase chip.

After power cycle, the chip is locked again and needs to be unlocked to get connected.

We have pcba:s coming to us from assembly house and there seems to be no physical faults in the board.

By replacing the cpu in rework station, gets the board working ok.

Any ideas what elese than faulty chip could cause this ?