topic Re: How to enable Mass Erase from Secure State in Kinetis Microcontrollers

How to enable Mass Erase from Secure State

sonkiet — Tue, 28 Jun 2011 00:35:41 GMT

Hi all,

When I started new project with IAR and load a simple program LED blink to TWR-K60N512, the Kinetis K60 ran into secure state. Unfortunately, the flash is being config as Mass Erase Dissable. I found the way to recover the MCU to normal state but not success. Do anyone has the solution to get out secure state with mass erase dissable?

Please help.

Re: How to enable Mass Erase from Secure State

dhaval_v_shah — Tue, 28 Jun 2011 11:00:24 GMT

Hi,

This link may help.

http://supp.iar.com/Support/?note=77989

Regards,

d2v0

Re: How to enable Mass Erase from Secure State

dhaval_v_shah — Tue, 28 Jun 2011 11:33:33 GMT

Hi,

Mass Erase Disable has no effect till Flash security is enabled. If Flash security is in secured state and Mass Erase is Disabled there is no way to unsecure device.

You may have to replace IC on board.

d2v0

Re: How to enable Mass Erase from Secure State

sonkiet — Tue, 28 Jun 2011 15:50:48 GMT

Thanks d2v0.

It's look like I have to stop my project for a period of time because no IC available @ my location now, and not easy to replace the IC. The best way is have to order new board. How Freescale and IAR let this problem occurred, it is very critical.... Why don't have the hardware method to reboot and erase all chip without replace IC?

Thanks,

Kiet

Re: How to enable Mass Erase from Secure State

dhaval_v_shah — Tue, 28 Jun 2011 17:38:13 GMT

I do agree with you Kiet. There has to be a way to recover the board atleast for the boards designed for development purpose.

I am also having one locked board lying on my desk. This one got locked when trying a demo code with IAR.

IAR doesn't seems to be a mature tool chain, I use Keil and they have handled locking bits very well.

d2v0