TM4C123GH6PZ: How to recover the locked device

Hi Charles,

Thank you for your reply.

These solutions you mentioned are perform chapter 4.3.4.3 in datasheet, right?

And let me ask one more question.

If execute only protection described chapter 8.2.3.3 is performed at once, are there any way to unlock the device?

Regards,

U-SK

Hi,

U-SK said:

These solutions you mentioned are perform chapter 4.3.4.3 in datasheet, right?

Yes, your understanding is correct.

U-SK said:

If execute only protection described chapter 8.2.3.3 is performed at once, are there any way to unlock the device?

Once it is in execute-only protection, you will not be able view the content of the flash memory. It is different than permanently disabling JTAG access. Although the flash memory is not readable, the debugger can still connect to the device. You don't need to 'unlock' the device in execute-only mode. You simply just erase the flash or load a new program.

Hi Charles,

Thank you for your reply.

>You simply just erase the flash or load a new program.

But it seems that execution only mode can not elase or rewrite according to below description in datasheet.

Could you clarify if we can erase and write flash or unlock?

Regards,

U-SK

Hi U-SK,

  I'm sorry to give you the wrong answer. You are right that in execute-only mode you cannot erase. You will need to 'unlock' the device using either the LM flash programmer or Uniflash. 

Hi Charles,

Thank you for your reply.

In case Execution only mode, Uniflash and LM Flasher can unlock with same way as the solution in the below post? 

https://e2e.ti.com/support/microcontrollers/other/f/908/p/922318/3407328#3407328

Regards,

U-SK

Hi Charles,

Thank you for your reply.

I understand!

Regards,

U-SK