Cortex M3 bootloader corruption

Hi,

What are the reasons that can create Cortex M3 bootloader corruption?
In my board, Randomly bootloader is getting corrupted.

If you're talking about a self written bootloader, (as opposed to the ROM bootloader) I've had this kind of issue due to EMC issues before.

To fix it, I had to do several hardware EMC fixes to my PCB, mostly added ESD protection.

I also made sure any flash write function in my software had a software lock on it, in other words additional checks that a flash write was desired and it wasn't some strange behaviour.

Thanks for the reply. I will check come back.

In which section of the circuit you have added the ESD protective components?

It all depends on where the ESD is getting in for your board. There is no one-size-fits-all protection for this type of problem.

You need to do tests, perhaps in a lab to see if you can reproduce the issue.

As a temporary attempted fix, you can try to remove or make any flash write code more robust.