how: simple way for code protection (read out firmware) LPC55S16

[Ralf_Rademacher]

Hi there

i just implemented a baremetal firmware on named Controller.

now i want to protect my firmware from being read out. How should i realize this?

In other controllers all i had to do was, setting a code protection bit. here it seems more complex and i did not find any concrete example.

best

Ralf

[Ralf_Rademacher]

Alice,

can you please provide an example?

BR

Ralf

[Alice_Yang]

Hello Ralf,

Sorry there isn't example.

BR

Alice

[Ralf_Rademacher]

Hi Alice,

I understand there is no example available right now. However, could you create one as you are the manufacturer of the LPC55S16? It would be very helpful.

BR

Ralf

[Alice_Yang]

Hello Ralf,

Yes, lpc55xx family differs from other controllers, there isn't simple way to protect code to read out.

For this chip, you can use life cycle states, while it is more complex , you can refer to thread:

https://community.nxp.com/t5/LPC-Microcontrollers/Does-LPCXpresso55S69-have-a-flash-readout-protecti...  

And User Manual of lpc55s16.

BR

Alice

[Ralf_Rademacher]

Hey Alice_Yang,

many thanks for your response. unfortunately I do not really understand how it should work.

may i ask you, if you could provide me an detailed example? I just want to protect my code and algorithms from being read. like on ohne Microcontrollers, where they had fuse bits or something else, which didnt allow customers to read out firmware and replicate through disassembling.

As a manufacturer, is it possible to remove the read protection once it has been set, or is it irreversible once it has been set?

BR

Ralf

[Alice_Yang]

Hello Ralf_Rademacher,

I know your meaning, while there isn't the simple way with this chip like you said"like on ohne Microcontrollers, where they had fuse bits or something else, which didnt allow customers to read out firmware and replicate through disassembling.". 

BR

Alice