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I think my FRDM-KW41Z board is "bricked". How do I fix the problem?

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I think my FRDM-KW41Z board is "bricked". How do I fix the problem?

‎02-06-2019 09:34 AM
685 Views
e_m412
Contributor I

I am using the FRDM-KW41Z and I keep getting this message "Readout protection is set and mass erase is disabled. J-Link cannot unprotect the device" after attempting to debug. How do I "unbrick" this board?

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‎02-06-2019 10:46 AM
591 Views
BlackNight
NXP Employee
NXP Employee

I'm affraid that you really bricked your microcontroller and you cannot access it any more (see How (not) to Secure my Microcontroller | MCU on Eclipse  for details).

With readout protection enabled and mass erase disabled the device is scured and locked and you have no way to regain access (that's the purpose of this feature).

The only way is to unsolder the device and solder a new one.

If mass erase is *not* enabled, then you still can unlock the device with a mass erase, see

Unlocking and Erasing FLASH with Segger J-Link | MCU on Eclipse 

I hope this helps,

Erich

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