S32KのトピックRe: S32K116 is locked while Flash Erase using CSEC. How to unlock it? Is there any tool?

S32K116 is locked while Flash Erase using CSEC. How to unlock it? Is there any tool?

muhammetkalayci — Tue, 07 Feb 2023 07:14:53 GMT

Hello,

my MCU is locked while flash erasing due to secured flash memory in CSEC operations.

I found out the problem but now I want to unlock my MCU.

Is there any way unlocking it? hard resetting? maybe NXP has a tool for that?

(I cannot connect not debugging, nor j-flash)

I am open to any solution.

Re: S32K116 is locked while Flash Erase using CSEC. How to unlock it? Is there any tool?

Senlent — Tue, 07 Feb 2023 09:49:26 GMT

Hi@muhammetkalayci

1.please try to use J-LINK to read the register of MDM_AP

for example:

Senlent_0-1675763344079.png

According to AN4507 :https://www.nxp.com/search?keyword=AN4507&start=0

"If the user disables mass erase with no other means to unsecure the device (no backdoor key and no firmware means of changing the default security options), then that device will be permanently secured."

2.If your J-Link can not connect to MCU, you can have a try to use the software provided in the below link.

Bricking and Recovering FRDM-KL25Z Boards: Reset, SWD Clock and Low Power

https://mcuoneclipse.com/2013/06/16/bricking-and-recovering-frdm-kl25z-boards-reset-swd-clock-and-low-power/

Re: S32K116 is locked while Flash Erase using CSEC. How to unlock it? Is there any tool?

muhammetkalayci — Mon, 13 Feb 2023 08:06:21 GMT

Hello,

I have tried both of them. In the first one, there was a power connection issue.

As a result, they did not solve the issue.

@Senlent Now, I want to ask if there is not any way to unlock mcu; I need a clear guide for erasing flash that will not lock again any chance.

Because this is 3rd mcu that is locked and I dont have much in backup.

Please provide me a clear and solid guideline.

Thank you,

Sincerely.

Re: S32K116 is locked while Flash Erase using CSEC. How to unlock it? Is there any tool?

Senlent — Mon, 13 Feb 2023 09:59:44 GMT

Hi@muhammetkalayci

you can take a look at the AN12130,

https://www.nxp.com/docs/en/application-note/AN12130.pdf

The chapter:3.2.5.2 Mass erase and CSEc considerations

In order for you to better understand these modules, you can also take a look at the following two documents

Using the Kinetis Security and Flash Protection Features

Getting Started with CSEc Security Module

These are some application notes I could find, maybe they can help you